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Sample records for color doppler echocardiographic

  1. Acute hemodialysis effects on doppler echocardiographic indices

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    Leila Abid

    2014-01-01

    Full Text Available Conventional echocardiographic (ECHO parameters of systolic and diastolic func-tion of the left ventricular (LV have been shown to be load dependent. However, the impact of pre-load reduction on tissue Doppler (TD parameters of LV function is incompletely understood. To evaluate the effect of a single hemodialysis (HD session on LV systolic and diastolic function using pulsed Doppler echocardiography and pulsed tissue Doppler imaging (TDI, we studied 81chronic HD patients (40 males; mean age 52.4 ± 16.4 years with these tools. ECHO parameters were obtained 30 min before and 30 min after HD. Fluid volume removed by HD was 1640 ± 730 cm [3] . HD led to reduction in LV end-diastolic volume (P <0.001, end-systolic volume (P <0.001, left atrium area (P <0.001, peak early (E-wave trans-mitral flow velocity (P <0.001, the ratio of early to late Doppler velocities of diastolic mitral inflow (P <0.001 and aortic time velocity integral (P <0.001. No significant change in peak S velocity of pulmonary vein flow after HD was noted. Early and late diastolic (E′ TDI velocities and the ratio of early to late TDI diastolic velocities (E′/A′ on the lateral side of the mitral annulus decreased signi-ficantly after HD (P = 0.013; P = 0.007 and P = 0.008, respectively. Velocity of flow progres-sion (Vp during diastole was not affected by pre-load reduction. Pulmonary artery systolic pressure and the diameter of the inferior vena cava decreased significantly (P <0.001 and P <0.001, respectively after HD. We conclude that most of the Doppler-derived indices of diastolic function are pre-load-dependent and velocity of flow progression was minimally affected by pre-load reduction in HD patients.

  2. Quantitative analysis of aortic regurgitation: real-time 3-dimensional and 2-dimensional color Doppler echocardiographic method--a clinical and a chronic animal study

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    Shiota, Takahiro; Jones, Michael; Tsujino, Hiroyuki; Qin, Jian Xin; Zetts, Arthur D.; Greenberg, Neil L.; Cardon, Lisa A.; Panza, Julio A.; Thomas, James D.

    2002-01-01

    BACKGROUND: For evaluating patients with aortic regurgitation (AR), regurgitant volumes, left ventricular (LV) stroke volumes (SV), and absolute LV volumes are valuable indices. AIM: The aim of this study was to validate the combination of real-time 3-dimensional echocardiography (3DE) and semiautomated digital color Doppler cardiac flow measurement (ACM) for quantifying absolute LV volumes, LVSV, and AR volumes using an animal model of chronic AR and to investigate its clinical applicability. METHODS: In 8 sheep, a total of 26 hemodynamic states were obtained pharmacologically 20 weeks after the aortic valve noncoronary (n = 4) or right coronary (n = 4) leaflet was incised to produce AR. Reference standard LVSV and AR volume were determined using the electromagnetic flow method (EM). Simultaneous epicardial real-time 3DE studies were performed to obtain LV end-diastolic volumes (LVEDV), end-systolic volumes (LVESV), and LVSV by subtracting LVESV from LVEDV. Simultaneous ACM was performed to obtain LVSV and transmitral flows; AR volume was calculated by subtracting transmitral flow volume from LVSV. In a total of 19 patients with AR, real-time 3DE and ACM were used to obtain LVSVs and these were compared with each other. RESULTS: A strong relationship was found between LVSV derived from EM and those from the real-time 3DE (r = 0.93, P clinically applicable.

  3. Quantitative analysis of aortic regurgitation: real-time 3-dimensional and 2-dimensional color Doppler echocardiographic method--a clinical and a chronic animal study

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    Shiota, Takahiro; Jones, Michael; Tsujino, Hiroyuki; Qin, Jian Xin; Zetts, Arthur D.; Greenberg, Neil L.; Cardon, Lisa A.; Panza, Julio A.; Thomas, James D.

    2002-01-01

    BACKGROUND: For evaluating patients with aortic regurgitation (AR), regurgitant volumes, left ventricular (LV) stroke volumes (SV), and absolute LV volumes are valuable indices. AIM: The aim of this study was to validate the combination of real-time 3-dimensional echocardiography (3DE) and semiautomated digital color Doppler cardiac flow measurement (ACM) for quantifying absolute LV volumes, LVSV, and AR volumes using an animal model of chronic AR and to investigate its clinical applicability. METHODS: In 8 sheep, a total of 26 hemodynamic states were obtained pharmacologically 20 weeks after the aortic valve noncoronary (n = 4) or right coronary (n = 4) leaflet was incised to produce AR. Reference standard LVSV and AR volume were determined using the electromagnetic flow method (EM). Simultaneous epicardial real-time 3DE studies were performed to obtain LV end-diastolic volumes (LVEDV), end-systolic volumes (LVESV), and LVSV by subtracting LVESV from LVEDV. Simultaneous ACM was performed to obtain LVSV and transmitral flows; AR volume was calculated by subtracting transmitral flow volume from LVSV. In a total of 19 patients with AR, real-time 3DE and ACM were used to obtain LVSVs and these were compared with each other. RESULTS: A strong relationship was found between LVSV derived from EM and those from the real-time 3DE (r = 0.93, P <.001, mean difference (3D - EM) = -1.0 +/- 9.8 mL). A good relationship between LVSV and AR volumes derived from EM and those by ACM was found (r = 0.88, P <.001). A good relationship between LVSV derived from real-time 3DE and that from ACM was observed (r = 0.73, P <.01, mean difference = 2.5 +/- 7.9 mL). In patients, a good relationship between LVSV obtained by real-time 3DE and ACM was found (r = 0.90, P <.001, mean difference = 0.6 +/- 9.8 mL). CONCLUSION: The combination of ACM and real-time 3DE for quantifying LV volumes, LVSV, and AR volumes was validated by the chronic animal study and was shown to be clinically applicable.

  4. Doppler echocardiographic evaluation of midventricular obstruction in cats with hypertrophic cardiomyopathy.

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    MacLea, H B; Boon, J A; Bright, J M

    2013-01-01

    Hypertrophic cardiomyopathy (HCM) is heterogeneous in both people and cats, with variability in the distribution of hypertrophy, hemodynamic characteristics, and Doppler echocardiographic findings. To document the Doppler echocardiographic characteristics of midventricular obstruction in some cats with HCM. Eight cats with hypertrophic cardiomyopathy. Retrospective case series. The medical records of cats presenting to the cardiology service at Colorado State University between February 2009 and January 2012 were reviewed. All cats had a physical examination; Doppler systolic blood pressure measurement; and transthoracic two-dimensional (2D), M-mode, and Doppler echocardiography were performed. A more thorough evaluation of the echocardiographic images and measurements was performed. Cats included in this study had echocardiograms of adequate quality to confirm the diagnosis of midventricular obstruction by documentation of left midventricular concentric hypertrophy; a midventricular turbulent Doppler color flow pattern; and high velocity, late-peaking flow at the area of turbulence. Cats with evidence of systemic hypertension defined as a systolic Doppler blood pressure of greater than 170 mmHg were excluded. All 8 cats had left ventricular hypertrophy at the level of the papillary muscles; left, midventricular hypertrophy; and in 4/8 cats there was apical hypertrophy or basilar hypertrophy of the interventricular septum. Color flow Doppler revealed turbulent flow in 8/8 cats and spectral Doppler (continuous and pulsed wave) revealed increased flow velocities and late-peaking flow profiles at the level of the left midventricle. Two of 8 cats had a bifid midventricular flow profile in which there was a midsystolic decline in left ventricular velocities with elevated velocities extending into early diastole. The peak left ventricular outflow velocity in all 8 cats was normal. A variant of HCM characterized by hypertrophy at the level of the papillary muscles with

  5. Doppler vortography: a color Doppler approach for quantification of the intraventricular blood flow vortices

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    Mehregan, Forough; Tournoux, François; Muth, Stéphan; Pibarot, Philippe; Rieu, Régis; Cloutier, Guy; Garcia, Damien

    2013-01-01

    We propose a new approach for quantification of intracardiac vorticity – Doppler vortography – based on conventional color Doppler images. Doppler vortography relies on the centrosymmetric properties of the vortices. Such properties induce particular symmetries in the Doppler flow data which can be exploited to describe the vortices quantitatively. For this purpose, a kernel filter was developed to derive a parameter –the blood vortex signature (BVS) – that allows detecting the main intracardiac vortices and estimating their core vorticities. The reliability of Doppler vortography was assessed in mock Doppler fields issued from simulations and in vitro data. Doppler vortography was also tested in patients and compared with vector flow mapping by echocardiography. Strong correlations were obtained between the Doppler vortography-derived and the ground-truth vorticities (in silico: r2 = 0.98, in vitro: r2 = 0.86, in vivo: r2 = 0.89). Our results demonstrated that Doppler vortography is a potentially promising echocardiographic tool for quantification of vortex flow in the left ventricle. PMID:24210865

  6. Doppler vortography: a color Doppler approach to quantification of intraventricular blood flow vortices.

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    Mehregan, Forough; Tournoux, François; Muth, Stéphan; Pibarot, Philippe; Rieu, Régis; Cloutier, Guy; Garcia, Damien

    2014-01-01

    We propose a new approach to quantification of intracardiac vorticity based on conventional color Doppler images -Doppler vortography. Doppler vortography relies on the centrosymmetric properties of the vortices. Such properties induce particular symmetries in the Doppler flow data that can be exploited to describe the vortices quantitatively. For this purpose, a kernel filter was developed to derive a parameter, the blood vortex signature (BVS), that allows detection of the main intracardiac vortices and estimation of their core vorticities. The reliability of Doppler vortography was assessed in mock Doppler fields issued from simulations and in vitro data. Doppler vortography was also tested in patients and compared with vector flow mapping by echocardiography. Strong correlations were obtained between Doppler vortography-derived and ground-truth vorticities (in silico: r2 = 0.98, in vitro: r2 = 0.86, in vivo: r2 = 0.89). Our results indicate that Doppler vortography is a potentially promising echocardiographic tool for quantification of vortex flow in the left ventricle. Copyright © 2014 World Federation for Ultrasound in Medicine & Biology. Published by Elsevier Inc. All rights reserved.

  7. Color Doppler artifact in anechoic regions.

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    Mitchell, D G; Burns, P; Needleman, L

    1990-05-01

    For color Doppler imaging, several types of signal processing are employed in order to produce acceptable images of blood flow in blood vessels while suppressing color in moving solid tissue. The processing can produce an artifact in which color may arise from noise or from tissue motion and fill anechoic regions preferentially. This artifact may complicate the differentiation of areas with blood flow from anechoic regions without flow. By using four different color Doppler ultrasound units to image a tissue-equivalent phantom containing anechoic cylinders, artifactual color resulted when gain was raised sufficiently. This color was concentrated in anechoic regions of a gray-scale image that did not contain flow. In two instruments, this artifact was only observed when the transducer was vibrated, simulating tissue motion. In these instruments, the identification of low-frequency, high-amplitude Doppler signals is used to locate moving solid tissue and so suppress color in these regions. In the other two instruments, the presence of echoes within the image suppressed the assignment of color. With both types of processing, color may appear artifactually in echo-free regions without flow, such as fluid collections. Presence or absence of flow should be confirmed by Doppler spectral analysis. An understanding of the origin and appearance of artifactual color can prevent its occurrence from detracting from the usefulness of color Doppler imaging.

  8. [Pilot study of echocardiographic studies using color- and pulsed-wave spectral Doppler methods in blue-crowned amazons (Amazona ventralis) and blue-fronted amazons (Amazona a. aestiva)].

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    Pees, M; Straub, J; Schumacher, J; Gompf, R; Krautwald-Junghanns, M E

    2005-02-01

    Colour-flow and pulsed-wave spectral Doppler echocardiography was performed on 6 healthy, adult Hispaniolan amazon parrots (Amazona ventralis) and 6 blue-fronted amazon parrots (Amazona a. aestiva) to establish normal reference values. Birds were anesthetized with isoflurane in oxygen and placed in dorsal recumbency. An electrocardiogram was recorded continuously and birds were imaged with a micro-phased-array scanner with a frequency of 7.0 MHz. After assessment of cardiac function in 2-D-echocardiography, blood flow across the left and the right atrioventricular valve and across the aortic valve was determined using color-flow and pulsed-wave spectral Doppler echocardiography. Diastolic inflow (mean value +/- standard deviation) into the left ventricle was 0.17 +/- 0.02 m/s (Hispaniolan amazons) and 0.18 +/- 0.03 m/s (Blue fronted amazons). Diastolic inflow into the right ventricle was 0.22 +/- 0.05 m/s (Hispaniolan amazons) and 0.22 +/- 0.04 m/s (Blue fronted amazons). Velocity across the aortic valve was 0.84 +/- 0.07 m/s (Hispaniolan amazons) and 0.83 +/- 0.08 m/s (Blue fronted amazons). Systolic pulmonary flow could not be detected in any of the birds in this study. No significant differences were evident between the two species examined. Results of this study indicate that Doppler echocardiography is a promising technique to determine blood flow in the avian heart. Further studies in other avian species are needed to establish reference values for assessment of cardiac function in diseased birds.

  9. Color Doppler US of the penis

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    Bertolotto, Michele (ed.) [Trieste Univ. Ospedale di Cattinara (Italy). Dept. Radiology

    2008-07-01

    This book provides a comprehensive reference and practical guide on the application of US to penile diseases and conditions. After introductory chapters on technical requirements and penile anatomy, subsequent chapters offer a systematic overview of the diverse applications of color Doppler US. The topics covered include erectile dysfunction, Peyronie's disease, priapism, trauma, tumors, the postoperative penis, inflammation, and fibrosis. Each topic is introduced by a clinical overview with the purpose of clarifying the problems and elucidating what the urologist may expect from color Doppler US. Thereafter, performance of the US study is explained and the pathological anatomy reviewed. High-quality images obtained with high-end US equipment are included. Each chapter also contains a section on the diagnostic information provided by other imaging modalities, and in particular MRI. (orig.)

  10. Right ventricular function in children with bronchial asthma: a tissue Doppler echocardiographic study.

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    Shedeed, Soad A

    2010-10-01

    Asthma is the most common cause of respiratory disability among children. Patients with severe bronchial asthma can experience cor pulmonale later in life, but little is known about the function of the right ventricle early in the disease. This study aimed to investigate the right ventricular function in children with bronchial asthma as detected by tissue Doppler echocardiography. This case-control study compared 60 asthmatic children ages 5 to 15 years between attacks (study group) with 60 apparently healthy children (control group). All the children were subjected to full history-taking, complete physical examination, measurement of peak expiratory flow rate (PEFR), chest x-ray, electrocardiography (ECG), echocardiographic examination, and both conventional and tissue Doppler study. The results of the tissue Doppler study examining the right ventricular diastolic function showed that peak E' velocity (10.08 ± 2.8 cm/s), peak A' velocity (5.7 ± 2.5 cm/s), E'/A' ratio (1.77 ± 0.58 m/s), and isovolumetric relaxation time (IVRT) of the lateral tricuspid annulus (138.9 ± 30.7 m/s) among the asthmatic patients differed significantly from those among the control subjects (12.4 ± 2.3, 7.8 ± 2.1 cm/s; 1.58 ± 0.32, and 91.1 ± 32.6 m/s, respectively). In addition, the E' velocity and IVRT of the lateral tricuspid annulus were significantly different among the mild, moderate, and severe cases (P children were apparently normal, the tissue Doppler echocardiographic study showed right ventricular dysfunction that is positively correlated with the severity of asthma. These findings signify the diagnostic value of tissue Doppler echocardiography for the early detection and monitoring of such deleterious effects among asthmatic patients.

  11. [Color Doppler sonography of focal abdominal lesions].

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    Licanin, Zoran; Lincender, Lidija; Djurović, V; Salihefendić, Nizama; Smajlović, Fahrudin

    2004-01-01

    Color Doppler sonography (CDS--spectral, color and power), harmonic imaging techniques (THI, PHI), possibility of 3D analysis of picture, usage of contrast agents, have raised the values of ultrasound as a diagnostic method to a very high level. THI--non-linear gray scale modality, is based on the processing of higher reflected frequencies, that has improved a picture resolution, which is presented with less artifacts and limiting effects of obesity and gases. Ultrasound contrast agents improve analysis of micro and macro circulation of the examined area, and with the assessment of velocity of supply in ROI (wash in), distribution and time of signal weakening (wash out), are significantly increasing diagnostic value of ultrasound. Besides the anatomical and topographic presentation of examined region (color, power), Color Doppler sonography gives us haemodynamic-functional information on vascularisation of that region, as well as on pathologic vascularisation if present. Avascular aspect of a focal pathologic lesion corresponds to a cyst or haematoma, while coloration and positive spectral curve discover that anechogenic lesions actually represents aneurysms, pseudoaneurysms or AVF. In local inflammatory lesion, abscess in an acute phase, CDS shows first increased, and then decreased central perfusion, while in a chronic phase, a pericapsular vascularisation is present. Contribution of CDS in differentiation of hepatic tumors (hemangioma, HCC and metastasis) is very significant. Central color dots along the peripheral blood vessels and the blush phenomenon are characteristics of capillary hemangioma, peritumoral vascular ring "basket" of HCC, and "detour" sign of metastasis. The central artery, RI from 0.45 to 0.60 and radial spreading characterize FNH. Hepatic adenoma is characterized by an intratumoral vein, and rarely by a vascular hallo. Further on, blood velocity in tumor defined by Color Doppler, distinguishes malignant from benign lesion, where 40 cm/s is a

  12. Power and color Doppler ultrasound settings for inflammatory flow

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    Torp-Pedersen, Søren; Christensen, Robin; Szkudlarek, Marcin

    2015-01-01

    OBJECTIVE: To determine how settings for power and color Doppler ultrasound sensitivity vary on different high- and intermediate-range ultrasound machines and to evaluate the impact of these changes on Doppler scoring of inflamed joints. METHODS: Six different types of ultrasound machines were used....... On each machine, the factory setting for superficial musculoskeletal scanning was used unchanged for both color and power Doppler modalities. The settings were then adjusted for increased Doppler sensitivity, and these settings were designated study settings. Eleven patients with rheumatoid arthritis (RA......) with wrist involvement were scanned on the 6 machines, each with 4 settings, generating 264 Doppler images for scoring and color quantification. Doppler sensitivity was measured with a quantitative assessment of Doppler activity: color fraction. Higher color fraction indicated higher sensitivity. RESULTS...

  13. Infective endocarditis following patch closure of ventricular septal defect: a cross-sectional Doppler echocardiographic study.

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    Shrivastava, S; Radhakrishnan, S

    1989-10-01

    Cross-sectional and Doppler echocardiographic characteristics of infective endocarditis are described in six cases following patch closure of a ventricular septal defect. The patients presented to us with fever one to five months after surgery. Five of them also had congestive cardiac failure. Cross-sectional echocardiography showed large masses over the patch in all cases. Dehiscence of the lower end of the patch was identified in three of them, and, in two cases, the right sinus of Valsalva had ruptured into the right ventricle. Doppler detected turbulent flow in the right ventricle in five cases, and a continuous signal indicating an aorto-right ventricular communication in two cases. A signal indicative of aortic regurgitation was also found in the latter two cases. Staphylococcus aureus was cultured from the blood in three cases and Aspergillus was identified at autopsy in one. The echocardiographic findings were confirmed in three cases (one during surgery and two at autopsy). Dehiscence of the patch and large masses were associated with a poor prognosis.

  14. Pulsed and Tissue Doppler Echocardiographic Changes in Hypertensive Crisis with and without End Organ Damage.

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    Garadah, Taysir; Kassab, Salah; Gabani, Saleh; Abu-Taleb, Ahmed; Abdelatif, Ahmed; Asef, Aysha; Shoroqi, Issa; Jamsheer, Anwer

    2011-01-01

    Hypertensive crisis (HC) is a common medical emergency associated with acute rise in arterial blood pressure that leads to end-organ damage (EOD). Therefore, it is imperative to find markers that may help in the prediction of EOD in acute hypertensive crisis. To assess the clinical presentations on admission; echocardiographic changes of pulsed and tissue Doppler changes in EOD patients compared with no EOD; and the risk of developing end organ damage for clinical and biochemical variables in hypertension crisis. The data of 241 patients with hypertensive crisis with systolic blood pressure (SBP) of >180 mmHg or diastolic blood pressure (DBP) >120 mmHg were extracted from patients files. Patients divided into hypertensive emergency (HE) with EOD, n = 62 and hypertensive urgency (HU) without EOD, n = 179. LV hypertrophy on ECG, echo parameters for wall thickness, left Ventricular mass index (LVMI), Body mass index (BMI), pulse Doppler ratio of early filling velocity E wave to late A wave (E/A) and ratio of E wave velocity to tissue Doppler Em to E wave (E/Em) were evaluated. Serum creatinine, hemoglobin, age, gender, body mass Index (BMI), history of diabetes mellitus, smoking, hypertension, stroke and hyperlipidemia were recorded. Multiple logistic regression analysis was applied for risk prediction of end organ damage of clinical variables. Patients with HE compared with HU were significantly older, with a significantly higher SBP on admission, high BMI and LVMI. Further there were significantly higher E/A ratio on Doppler echo and higher E/Em ratio on tissue Doppler echocardiogram. Multiple regression analysis with adjustment for age and sex shows positive predictive value with odds ratio of SBP on admission >220 mmHg of 1.98, serum creatinine > 120 µg/L of 1.43, older age > 60 year of 1.304, obesity (BMI ≥ 30) of 1.9, male gender of 2.26 and left ventricle hypertrophy on ECG of 1.92. The hemoglobin level, history of smoking, hyperlipidemia and DM were with no

  15. Color Doppler US of superficial adenopathies; Il color Doppler nelle adenopatie superficiali

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    Giovagnorio, F. [Rome Univ. (Italy). 1. Cattedra di Radiologia

    1999-03-01

    Superficial lymph node are frequently involved in different diseases. Their location makes them suitable for effective assessment with high-resolution US and color Doppler has been recently suggested as a tool for increasing sensitivity in lymph node studies. Thus the author investigated the main vascular patterns detectable in abnormal superficial lymph nodes. [Italian] Numerosa malattie con natura differente coinvolgono i linfonodi superficiali: la localizzazione ne consente l'esplorazione con ecografia con alta risoluzione e lo studio mediante eco color Doppler e' stato proposto negli ultimi anni incontrando notevole sviluppo in tempi recenti. Scopo del lavoro e' illustrare il contributo personale nella definizione dei principali quadri riscontrabili nelle diverse adenopatie superficiali.

  16. [Absent pulmonary valve syndrome with ductal origin of the left pulmonary artery. Diagnosis only by 2-D echo doppler color flow mapping].

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    Cazzaniga, M; Rico Gómez, F; Ros Pérez, P; Quero Jiménez, C; Rodríguez Vázquez del Rey, M

    2000-01-01

    A two-month old infant is described with the rare combination of absent pulmonary valve syndrome, ventricular septal defect, pulmonar "anular" stenosis and ductal origin of the left pulmonary artery. The diagnosis that was confirmed in the operating room was made by 2-D echocardiographic Doppler color flow mapping study without the support of cardiac catheterization.

  17. Evaluating Peripheral Vascular Injuries: Is Color Doppler Enough for Diagnosis?

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    Mohd Lateef Wani

    2014-03-01

    Full Text Available Background:: Vascular injury poses a serious threat to limb and life. Thus, diagnosis should be made immediately with minimally invasive methods. Doppler is a good aid in diagnosis of vascular injury. Methods:: The present prospective study was conducted on 150 patients who presented with soft signs (the signs which are suggestive but not confirmatory of vascular injury. They were subjected to color Doppler examination before exploration. The patients with the features of vascular injury on color Doppler were subjected to exploration. On the other hand, those who had normal Doppler were subjected to CT- angiography. Then, the findings of the exploration were matched with those of color Doppler. The data were analyzed using the SPSS statistical software. Results:: Out of the 150 Doppler examinations, 110 (73.33% were reported as positive, while 40 were reported as negative for vascular injury. These were subjected to CT-angiography and seven of them had the features of vascular injury on CT-angiography. All the patients with positive Doppler or CT angiography findings were subjected to exploration. Doppler had a sensitivity of 94% and specificity of 82.5% in diagnosis of vascular injury using Binary classification test. Conclusions:: Color Doppler is an easily available, reliable, and handy method of diagnosing a vascular injury. It has a very high sensitivity and specificity in diagnosis of vascular injuries.

  18. The Doppler echocardiographic myocardial performance index predicts left-ventricular dilation and cardiac death after myocardial infarction

    DEFF Research Database (Denmark)

    Møller, J E; Søndergaard, E; Poulsen, S H

    2001-01-01

    To investigate the value of the Doppler-derived myocardial performance index to predict early left-ventricular (LV) dilation and cardiac death after a first acute myocardial infarction (AMI), Doppler echocardiography was performed within 24 h of hospital admission, on day 5, 1 and 3 months after...... AMI in 125 consecutive patients. The index measured on day 1 correlated well with the change in end-diastolic volume index observed from day 1 to 3 months following AMI (r = 0.66, p 0.0001). One-year survival in patients with Doppler index patients with index > or = 0......, we conclude that the Doppler echocardiographic myocardial performance index is a predictor of LV dilation and cardiac death after a first AMI....

  19. Pulsed and Tissue Doppler Echocardiographic Changes in Patients with Thalassemia Major

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    Taysir S. Garadah

    2010-01-01

    Full Text Available Background Doppler echocardiographic studies of left ventricle (LV systolic and diastolic function in patients with β-Thalassemia Major (β-TM had shown different patterns of systolic and diastolic dysfunction. Aim This cross-sectional study was designed to study the LV systolic and diastolic function in patients with β-TM using Pulsed Doppler (PD and Tissue Doppler (TD echocardiography. Methods All patients were evaluated clinically and by echocardiography, The study included patients with β-TM (n = 38, age 15.7 ± 8.9 years compared with an age-matched control group (n = 38, age 15.9 ± 8.9 years. The pulse Doppler indices were normalized for age and heart rate. Results Compared with control patients, M-Mode showed that patients with β-TM have thicker LV septal wall index (0.659 ± 0.23 vs. 0.446 ± 0.219 cm, P ≤ 0.001, posterior wall index (0.659 ± 0.235 vs. 0.437 ± 0.214 cm, P ≤ 0.01, and larger LVEDD index is (3.99 ± 0.48 vs. 2.170 ± 0.57 mm. P = 0.035. Pulsed Doppler showed high LV trans-mitral E wave velocity (70.818 ± 10.139 vs. 57.532 ± 10.139, p = 0.027 and E/A ratio (1.54 vs. 1.23, P ≤ 0.01. The duration of Deceleration time (DT and isovolumic relaxation time (IVRT were significantly shorter in patients with β-TM (150.234 ± 20.0.23 vs. 167.123 ± 19.143 msec, P ≤ 0.01 and (60.647 ± 6.77 vs. 75.474 ± 5.83 msec, P ≤ 0.001, respectively. The ratio of transmitral E wave velocity to the tissue Doppler E wave at the basal septal mitral annulus E/Em – was significantly higher in β-TM group (14.024 ± 2.29 vs. 12.132 ± 1.82, P ≤ 0.01. The Tissue Doppler systolic velocity (Sm and the early diastolic velocity (Em were significantly lower in β-TM group compared to control (4.31 ± 1.2 cm/s vs. 6.95 ± 2.1, P ≤ 0.01 and 4.31 ± 2.7 cm/s vs. 5.82 ± 2.5, P ≤ 0.01 respectively. The tricuspid valve velocity was significantly higher than controls (2.993 ± 0.569 vs. 1.93 ± 0.471 m/sec, respectively, P ≤ 0

  20. Monitoring treatment response with color and power Doppler.

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    Lagalla, R; Caruso, G; Finazzo, M

    1998-05-01

    Color and power Doppler are now widely used to monitor treatment response because of the latest technologic advances and of the increasing use of echo-enhancing agents. The assessment of treatment response is based on the amount of necrosis obtained and changes in local vascularization indicate a successful treatment. To date, clinical experiences have mainly concerned the treatment of hepatocellular carcinomas, hyperfunctioning nodules of the thyroid and parathyroid glands and the neoadjuvant chemotherapy of breast cancer. Aim of this review is to describe the role and potentials of color and power Doppler in this field. Hepatocellular carcinomas are currently treated with surgery or percutaneous ethanol injection and/or chemoembolization. Treatment response can be monitored with color Doppler: after a successful treatment, color signals are no longer detectable on color Doppler images. Conversely, the presence of arterial signals indicates persistent viable tumor. Unfortunately, color Doppler is limited when the hepatocellular carcinoma is hypovascular, small or deep. Echo-enhancing agents may help overcome these limitations, although spiral computed tomography or dynamic magnetic resonance imaging cannot be replaced yet in the definitive assessment of tumor necrosis. Color and power Doppler are well-established tools in the study of functioning thyroid and parathyroid adenomas after percutaneous ethanol injection. Echo-enhancing agents may improve Doppler sensitivity in the detection of residual viable tissue. Other interesting applications of color and power Doppler in this field are secondary hyperparathyroidism and hyperfunctioning thyreopathies (Graves' disease) treated with mercaptoimidazole. The evaluation of systolic flow velocity in the inferior thyroid artery is more reliable than the quantitative analysis of color signals in monitoring treatment response in Graves' disease. In our experience, systolic velocity in the inferior thyroid artery decreased

  1. Prognostic meaning of coronary microvascular disease in type 2 diabetes mellitus: a transthoracic Doppler echocardiographic study.

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    Cortigiani, Lauro; Rigo, Fausto; Gherardi, Sonia; Galderisi, Maurizio; Bovenzi, Francesco; Sicari, Rosa

    2014-07-01

    The prognostic value of Doppler-derived coronary flow velocity reserve (CFVR) of the left anterior descending coronary artery in patients with type 2 diabetes with preserved left ventricular systolic function and without flow-limiting stenoses on angiography remains undetermined. The study sample consisted of 144 patients with type 2 diabetes (82 men; mean age 62 ± 10 years) with chest pain or angina-equivalent symptoms, no histories of coronary artery disease, and echocardiographic ejection fractions ≥ 50%. All patients underwent dipyridamole stress echocardiography with CFVR assessment of the left anterior descending coronary artery by transthoracic Doppler echocardiography and coronary angiography showing normal coronary arteries or nonobstructive coronary artery disease. Mean CFVR was 2.44 ± 0.57. On individual patient analysis, 109 patients (76%) had CFVR > 2, and 35 (24%) had CFVR ≤ 2. During a median follow-up period of 29 months (interquartile range, 14-44 months), 17 hard events (five deaths, 12 nonfatal myocardial infarctions) occurred. The annual hard-event rate was 13.9% in subjects with CFVR ≤ 2 and 2.0% in those with CFVR > 2. The annual event rate associated with CFVR ≤ 2 was significantly higher both in patients with left ventricular hypertrophy (P coronary artery disease was not an independent predictor of outcomes. Microvascular dysfunction before the occurrence of coronary artery involvement is a strong and independent predictor of outcomes in patients with type 2 diabetes. Vasodilator stress CFVR is a suitable tool to assess microvascular dysfunction in routine clinical practice. Copyright © 2014 American Society of Echocardiography. Published by Mosby, Inc. All rights reserved.

  2. Diagnosis of cervical cancer with transvaginal color Doppler sonography

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    Li-bo DENG; Wei ZHOU; Chang, Shu-Fang; Lin, Ming-Jie

    2011-01-01

    Objective To investigate the imaging features of cervical cancer by transvaginal color Doppler sonography(TVCS),and evaluate the diagnostic value of TVCS.Methods A hundred and thirty cases of cervical intraepithelial neoplasia(CIN) grade Ⅰ-Ⅱ and cervical cancer,diagnosed by Thinprep cytologic test(TCT),cervical biopsy and pathological examination,received TVCS examination.The image characters and color Doppler flow imaging(CDFI) were collected and analyzed.Another 41 cases with normal cervice...

  3. Ultrasonography with color Doppler and power Doppler in the diagnosis of periapical lesions

    Directory of Open Access Journals (Sweden)

    Sumit Goel

    2011-01-01

    Full Text Available Aim: To evaluate the efficacy of ultrasonography (USG with color Doppler and power Doppler applications over conventional radiography in the diagnosis of periapical lesions. Materials and Methods: Thirty patients having inflammatory periapical lesions of the maxillary or mandibular anterior teeth and requiring endodontic surgery were selected for inclusion in this study. All patients consented to participate in the study. We used conventional periapical radiographs as well as USG with color Doppler and power Doppler for the diagnosis of these lesions. Their diagnostic performances were compared against histopathologic examination. All data were compared and statistically analyzed. Results: USG examination with color Doppler and power Doppler identified 29 (19 cysts and 10 granulomas of 30 periapical lesions accurately, with a sensitivity of 100% for cysts and 90.91% for granulomas and a specificity of 90.91% for cysts and 100% for granulomas. In comparison, conventional intraoral radiography identified only 21 lesions (sensitivity of 78.9% for cysts and 45.4% for granulomas and specificity of 45.4% for cysts and 78.9% for granulomas. There was definite correlation between the echotexture of the lesions and the histopathological features except in one case. Conclusions: USG imaging with color Doppler and power Doppler is superior to conventional intraoral radiographic methods for diagnosing the nature of periapical lesions in the anterior jaws. This study reveals the potential of USG examination in the study of other jaw lesions.

  4. Ultrasonography with color Doppler and power Doppler in the diagnosis of periapical lesions

    Science.gov (United States)

    Goel, Sumit; Nagendrareddy, Suma Gundareddy; Raju, Manthena Srinivasa; Krishnojirao, Dayashankara Rao Jingade; Rastogi, Rajul; Mohan, Ravi Prakash Sasankoti; Gupta, Swati

    2011-01-01

    Aim: To evaluate the efficacy of ultrasonography (USG) with color Doppler and power Doppler applications over conventional radiography in the diagnosis of periapical lesions. Materials and Methods: Thirty patients having inflammatory periapical lesions of the maxillary or mandibular anterior teeth and requiring endodontic surgery were selected for inclusion in this study. All patients consented to participate in the study. We used conventional periapical radiographs as well as USG with color Doppler and power Doppler for the diagnosis of these lesions. Their diagnostic performances were compared against histopathologic examination. All data were compared and statistically analyzed. Results: USG examination with color Doppler and power Doppler identified 29 (19 cysts and 10 granulomas) of 30 periapical lesions accurately, with a sensitivity of 100% for cysts and 90.91% for granulomas and a specificity of 90.91% for cysts and 100% for granulomas. In comparison, conventional intraoral radiography identified only 21 lesions (sensitivity of 78.9% for cysts and 45.4% for granulomas and specificity of 45.4% for cysts and 78.9% for granulomas). There was definite correlation between the echotexture of the lesions and the histopathological features except in one case. Conclusions: USG imaging with color Doppler and power Doppler is superior to conventional intraoral radiographic methods for diagnosing the nature of periapical lesions in the anterior jaws. This study reveals the potential of USG examination in the study of other jaw lesions. PMID:22223940

  5. Clinical and Echocardiographic Evaluation of Regional Systolic Function Detected by Tissue Doppler Imaging in Hypertrophic Cardiomyopathy

    Directory of Open Access Journals (Sweden)

    A Sadeghpour

    2009-09-01

    Full Text Available Background: Hypertrophic cardiomyopathy (HCM is the most common type of the genetic cardiovasculardiseases. Regarding to tremendous heterogeneity in the phenotypic expression of HCM, which is generally unrelatedto genotype, we aimed to study, clinical and echocardiographic parameters such as Tissue Doppler Imaging(TDI in various subtypes of HCM patients and evaluate the influence of race and gender in Iranian patients.Methods: Patients with HCM underwent a complete clinical and echocardiographic study including TDI toassess regional systolic contraction( in the 12 segments and early diastolic annular velocity (Em from theseptal mitral annulus.Results: The study comprised 41 patients (20 women, mean age = 41 ± 15 years with mean LVEF 55%±4.8%and mean maximal septal thickness 2.07cm. Considering LVOT gradient>30mmHg, hypertrophic obstructivecardiomyopathy (HOCM was found in 18 (45%. Asymmetric septal hypertrophy (ASH existed in 27 patients(67%, systolic anterior motion of anterior mitral leaflet (SAM in 25 persons (64%. Nineteen patients (46.3%were included in NYHA function class (FC II and 6 (14.7% in FC III or higher. We found syncope in 10(24.4%, chest pain in 4 (9.8%, atrial fibrilation in 14.6 % and ventricular arrhythmias in (17.1% of patients.History of ICD was seen in 7 (17.1% and PPM in 9 cases. Mean E’ velocity was 5.44± 1.65 cm/sec and S velocity5.70± 1.49 cm/sec with significant lower S velocity and E’ in syncope patients. Overall, HOCM patients hadgrade II diastolic dysfunction with E/É >15(17.54±7.46. Majority (25 of cases (61% were categorized in typeIII of HCM. RV involvement was observed in 11 patients (28.2%.No significant differences existed betweenprevalence of syncope and dysrhythmia among HCM and HOCM patients.Conclusion: In our study, we found lower detection of latent HOCM, compared to other studies, suggestive ofinadequate use of appropriate provocative maneuvers such as exercise stress echocardiography and amyl

  6. Color Doppler Ultrasonography in Mapping Oral Squamous Cell Carcinoma

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    Rahul Gandhi

    2015-07-01

    Full Text Available Background: Although Color Doppler Ultrasonography (CDUS is useful in the diagnosis of various diseases of the head and neck, flow signals in oral malignant masses are less studied; hence the present study assesses the usefulness of Color Doppler Ultrasonography in quantifying oral squamous cell carcinoma (OSCC vascularization. In addition, we determine the hemodynamic parameters by spectral analysis obtained during a Color Doppler Ultrasonography procedure. We have studied the usefulness of Color Doppler Ultrasonography in mapping oral squamous cell carcinoma of the buccal mucosa, tongue and lip. Methods: This case-control study enrolled 60 subjects aged 20-70 years. Group A constituted 30 cases diagnosed with oral squamous cell carcinoma and Group B constituted 30 healthy controls. Ultrasonographic investigation of each mass was performed. The spectral waveform (time-velocity Doppler spectrum of the flow signal was analyzed for the pulsatility index, resistive index, peak systolic velocity (m/sec, and end diastolic velocity (m/sec. All patients had real-time, gray-scale sonography and Color Doppler Ultrasonography with spectral wave analysis. Results: The mean value for the resistive index in patients with oral squamous cell carcinoma was 0.40±0.14 whereas for healthy subjects, it was 0.83±0.07. The mean pulsatility index value in malignant patients was 0.86±0.20 while for healthy subjects, it came-out to be 2.61±0.77. Conclusion: These Doppler indices have been shown to be sensitive and specific for the diagnosis of malignant oral tumors. Although Color Doppler Ultrasonography cannot replace histopathological procedures, it plays a definite role as an adjunct to clinical evaluation of oral squamous cell carcinoma patients.

  7. Evaluation of Cardiovascular System in Fibromyalgia Syndrome: Tissue Doppler Echocardiographic Investigation

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    Selma YAZICI

    2010-05-01

    Full Text Available Aim: We aim to investigate besides the cardiac structures and functions by both conventionalmethods and Tissue Doppler Echocardiography (TDE which is a new and useful method inpatients with Fibromyalgia (FM. Additionally, we evaluated QT parameters (QT maximum,QT minimum and QT dispertion with the use of electrocardiography in order to measure theautonomic dysfunction which is a possible mechanism in the pathogenesis of the disease. Methods: The study was performed on 42 patients (mean age 41 years, 38 female and 38completely healthy subjects (35 female, mean age of 42 years who were admitted to the sameclinic were collected as the control group. All the individuals were undergone a completephysical examination, electrocardiography (recordings were displayed at 50 mm/s speed andechocardiography evaluation (both conventional methods and TDE.Results: Analysis of electrocardiographic recordings revealed mildly increased mean QTdispertion in the patient group, but this difference was statistically insignificant. Analysis ofconventional echocardiographic parameters revealed similar results between the patient groupand the control cases. However, an important finding of this study is that significant diastolicdysfunction was found in the patient group which was recorded with the TDE technique. Emwave velocity and Em/Am ratios were significantly lower in patients with FM compared withcontrols (p<0.005, p<0.01, respectively. Sm and Am waves velocities were similar in bothgroups. Conclusion: In this study, significant left ventricular diastolic dysfunction which was detectedby TDE technique can partly explain several symptoms such as fatigue and dyspnea in FM. Inaddition, fully cardiac evaluation of patients with FM might be obtained supporting findingsthe autonomic dysfunction theory in fibromyalgia pathogenesis.

  8. Comparison of power Doppler and color Doppler ultrasonography in the detection of intrasticular blood flow of normal infants

    Energy Technology Data Exchange (ETDEWEB)

    Shin, Sung Ran; Lee, Ho Kyoung; Lee, Won Gyun; Youk, Dong Joon; Rho, Taek Soo; Lee, Min Jin; Lee, Sang Chun [Seoul Red Cross Hospital, Seoul (Korea, Republic of)

    1999-09-15

    To compare color Doppler ultrasonography (US) and power Doppler US in the detection of intratesticular blood flow in normal infants and to asses the symmetry of blood flow. Testicular blood flow was assessed prospectively in 100 testes of 50 infants with both power and color Doppler US. We compared the power Doppler with color Doppler to detect intratesticular blood. When the flow was detected, intratesticular blood flow was graded as follows: grade 1: single intratesticular Doppler signal ; grade 2: multiple intratesticular Doppler signals. The symmetry of intratesticular flow was assessed by using the same method. Intratesticular flow was detected in 72 (72%) and 68 (68%) testes on power and color Doppler US, respectively. In 76 testes (76%), intratesticular flow was detected in either one or both techniques. On power Doppler US, grade 1 was seen in 40 tests and grade 2 in 32 testes. On color Doppler US, grade 1 was noted in 52 testes and grade 2 in 16 testes. Testicular blood flow was symmetric on both power and color Doppler US in each patient. There was no difference between power Doppler and color Doppler ultrasonography in detecting intratesticular blood flow in normal infants.

  9. Ambulatory blood pressure and Doppler echocardiographic indexes of borderline hypertensive men presenting an exaggerated blood pressure response during dynamic exercise

    Directory of Open Access Journals (Sweden)

    F.L. Herkenhoff

    2001-10-01

    Full Text Available Borderline hypertension (BH has been associated with an exaggerated blood pressure (BP response during laboratory stressors. However, the incidence of target organ damage in this condition and its relation to BP hyperreactivity is an unsettled issue. Thus, we assessed the Doppler echocardiographic profile of a group of BH men (N = 36 according to office BP measurements with exaggerated BP in the cycloergometric test. A group of normotensive men (NT, N = 36 with a normal BP response during the cycloergometric test was used as control. To assess vascular function and reactivity, all subjects were submitted to the cold pressor test. Before Doppler echocardiography, the BP profile of all subjects was evaluated by 24-h ambulatory BP monitoring. All subjects from the NT group presented normal monitored levels of BP. In contrast, 19 subjects from the original BH group presented normal monitored BP levels and 17 presented elevated monitored BP levels. In the NT group all Doppler echocardiographic indexes were normal. All subjects from the original BH group presented normal left ventricular mass and geometrical pattern. However, in the subjects with elevated monitored BP levels, fractional shortening was greater, isovolumetric relaxation time longer, and early to late flow velocity ratio was reduced in relation to subjects from the original BH group with normal monitored BP levels (P<0.05. These subjects also presented an exaggerated BP response during the cold pressor test. These results support the notion of an integrated pattern of cardiac and vascular adaptation during the development of hypertension.

  10. Effect of preload alternations on a new Doppler echocardiographic index of combined systolic and diastolic performance

    DEFF Research Database (Denmark)

    Møller, J E; Poulsen, S H; Egstrup, K

    1999-01-01

    The objective of the study was to assess the effect of preload alternations on a nongeometric Doppler index of combined systolic and diastolic myocardial performance (MPI). Doppler echocardiography was performed during Valsalva maneuver, passive leg lifting, and after sublingual administration...

  11. Color M-mode and pulsed wave tissue Doppler echocardiography

    DEFF Research Database (Denmark)

    Møller, J E; Søndergaard, E; Poulsen, S H

    2001-01-01

    To assess the association between color M-mode flow propagation velocity and the early diastolic mitral annular velocity (E(m)) obtained with tissue Doppler echocardiography and to assess the prognostic implications of the indexes, echocardiography was performed on days 1 and 5, and 1 and 3 months...

  12. Color doppler in diagnosis of pathological changes in blood vessels

    Directory of Open Access Journals (Sweden)

    Mladenović Saša

    2014-01-01

    Full Text Available Color Doppler ultrasound is a method that allows noninvasive imaging of blood flow through a blood vessel and analysis of blood vessels, which can be made to flow disturbance and the presence of plaque and narrowing of the blood vessel. Color Doppler ultrasonography allows early detection of pathological changes in blood vessels, which contributes to adequate preventive and therapeutic procedures in the prevention of cerebrovascular disorders. The aim of this paper is to demonstrate the importance of color Doppler ultrasound blood vessels in the diagnosis of pathological changes in the blood vessels of the neck. To create a work used the material of the Cabinet of color Doppler ultrasonography of the Health Center in Donja Gusterica in a prospective study of a random sample of 60 patients were reviewed in January 2014. Gender analysis examined patients, women were 32 (53.33% and 28 men (46.67%. Looking at the age of examined patients, we have found that most of them 43 (71.67% over the age of 50 years, while we found 17 (28.33% patients under 50 years. Atherosclerotic plaques were diagnosed in 36, a change in the shape of the carotid arteries in 29 patients. Atherosclerotic plaque, we usually find the bifurcation ACC and the Origin ACI in 23 (63.89%. Duplex sonography shows what angioneurologists and vascular surgeons are most interested in: the morphology of arterial lesions and hemodynamic effects.

  13. Role of color Doppler ultrasound in the diagnosis of nonpalpable ...

    African Journals Online (AJOL)

    Radiol Med (Torino) 1992; 84:785–791. 13 Gangopadhyay AN, Sharma S, Bhushan V, Shukla RC. Role of preoperative versus post-operative HCG therapy in bilateral nonpalpable undescended testis. J Indian Assoc Pediatr Surg 2005; 10:164–167. Table 1 Site of nonpalpable testes by color Doppler ultrasound. Inguinal ...

  14. Role of color Doppler ultrasound in the diagnosis of nonpalpable ...

    African Journals Online (AJOL)

    ing ultrasonography, computed tomography (CT) scan, arteriography, and magnetic resonance imaging (MRI) have been tried with limited success rate [4]. Color Doppler ultrasound (CDUS) is a simple and non- invasive diagnostic tool. It has been used for the diagnosis of torsion of testes [5,6]. However, there does not exist.

  15. Two dimensional and Doppler echocardiographic evaluation of patients presenting at Obafemi Awolowo University Teaching Hospitals Complex Ile Ife Nigeria a prospective study of 2501 subjects

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    Adebayo RA

    2013-07-01

    Full Text Available Rasaaq Ayodele Adebayo,1 Patience Olayinka Akinwusi,2 Michael Olabode Balogun,1 Anthony Olubunmi Akintomide,1 Victor Oladeji Adeyeye,1 Olugbenga Olusola Abiodun,1 Luqman Adeleke Bisiriyu,3 Suraj Adefabi Ogunyemi,1 Ebenezer Adekunle Ajayi,4 Olufemi Eyitayo Ajayi,1 Adebayo Tolulope Oyedeji5 1Cardiology Unit, Department of Medicine, Obafemi Awolowo University Teaching Hospitals Complex, Ile-Ife, Osun State, 2Cardiology Unit, Department of Medicine, Osun State University, Osogbo, Osun State, 3Department of Demography and Social Statistics, Obafemi Awolowo University, Ile-Ife, Osun State, 4Cardiology Unit, Department of Medicine, Ekiti State University Teaching Hospital, Ado-Ekiti, Ekiti State, 5Cardiology Unit, Department of Medicine, LAUTECH Teaching Hospital, Osogbo, Osun State, Nigeria Background: Echocardiography remains a key noninvasive cardiac investigative tool in the management of patients, especially in a developing economy like Nigeria. In this study, we investigated the indications for transthoracic echocardiography and spectrum of cardiac disease found in patients referred to our cardiac unit for echocardiography. Methods: A prospective two-dimensional, pulsed, continuous, and color-flow Doppler echocardiographic evaluation was done using the transthoracic approach in 2501 patients over an eight-year period. Univariate data analysis was performed for mean age, gender, clinical indications, and diagnoses. Results: The subject age range was less than 12 months to 97 years (mean 52.39 years. There were 1352 (54.06% males and 1149 (45.94% females. The most common indication for echocardiography was hypertension (52.1% followed by congestive cardiac failure (13.9%. Others were for screening (6.1%, arrhythmias (5%, cerebrovascular disease (5%, chest pain (3.3%, chronic kidney disease (3.2%, congenital heart disease (2.6%, cardiomyopathy (1.8%, rheumatic heart disease (1.7%, diabetes mellitus (1.3%, thyrocardiac disease (1.2%, ischemic heart

  16. Tissue Doppler echocardiographic quantification. Comparison to coronary angiography results in Acute Coronary Syndrome patients

    Directory of Open Access Journals (Sweden)

    Allal Joseph

    2005-04-01

    Full Text Available Abstract Background Multiples indices have been described using tissue Doppler imaging (DTI capabilities. The aim of this study was to assess the capability of one or several regional DTI parameters in separating control from ischemic myocardium. Methods Twenty-eight patients with acute myocardial infarction were imaged within 24-hour following an emergent coronary angioplasty. Seventeen controls without any coronary artery or myocardial disease were also explored. Global and regional left ventricular functions were assessed. High frame rate color DTI cineloop recordings were made in apical 4 and 2-chamber for subsequent analysis. Peak velocity during isovolumic contraction time (IVC, ejection time, isovolumic relaxation (IVR and filling time were measured at the mitral annulus and the basal, mid and apical segments of each of the walls studied as well as peak systolic displacement and peak of strain. Results DTI-analysis enabled us to discriminate between the 3 populations (controls, inferior and anterior AMI. Even in non-ischemic segments, velocities and displacements were reduced in the 2 AMI populations. Peak systolic displacement was the best parameter to discriminate controls from AMI groups (wall by wall, p was systematically Conclusion DTI-analysis appears to be valuable in ischemic heart disease assessment. Its clinical impact remains to be established. However this simple index might really help in intensive care unit routine practice.

  17. Ultrasonography and color Doppler in juvenile idiopathic arthritis

    DEFF Research Database (Denmark)

    Laurell, Louise; Court-Payen, Michel; Nielsen, Susan

    2011-01-01

    Background The ankle region is frequently involved in juvenile idiopathic arthritis (JIA) but difficult to examine clinically due to its anatomical complexity. The aim of the study was to evaluate the role of ultrasonography (US) of the ankle and midfoot (ankle region) in JIA. Doppler-US detected...... hypertrophy, effusion) and by color Doppler (synovial hyperemia) before and 4 weeks after US-guided steroid injection. Results US detected 121 compartments with active disease (joints, tendon sheaths and 1 ganglion cyst). Multiple compartments were involved in 80% of the ankle regions. The talo-crural joint...

  18. [Importance of color Doppler in diagnostics of breast diseases].

    Science.gov (United States)

    Kavtaradze, S N; Mosidze, T G

    2010-01-01

    The breast cancer occupies one of the first places among women's malignant neoplasms. Breast cancer case rate annually increases in the majority of the countries of the world. It is very important early diagnostics and active revealing of breast pre-tumor diseases. With the purpose of definition of value of color Doppler, there were inspected 127 patients with various breast pathologies. Breast ultrasonic research, color Doppler and power Doppler allowed obtaining the essential additional data for carrying out of differential diagnostics. According to the results, concentration of vessels in a zone of tumor unit with a primary locating on periphery is characteristic for malignant formations of breast. It is, accordingly, cause of rising vascularisation of tissues of breast, and also high parameters of linear speed of blood-flow - Vmax - 0,34+/-0,05 m/s, Pi (Pulls index )- 1,42+/-0,04, Ri (Resistance index) - 0,71+/-0,02. Parameters of linear rate of a blood-flow are lower for non malignant nodal formations - Vmax from 0,14+/-0,02-0,19+/-0,02 m/s, Pi - 1,42+/-0,12-1,42+/-0,06, Ri - 0,60+/-0,02-0,62+/-0,02. In cases of weak vascularised of nodal formations the method of power Doppler was used. The maximal rate in circumflex vessels of the pathological formations in most cases did not exceed 0,25 m/s, when size of formation was up to 1,5 sm and 0,7 m/s when size of formations was more than 3 sm. At use of ultrasonic intervention combining with color Doppler and power Doppler sensitivity of diagnostics has made 93,8% and specificity - 88,6%. Proceeding from, color Doppler especially in a combination to other methods of research is the effective method, allowing increase of diagnostic accuracy. Dopplerography, allowing to visualization of blood-flow in fine vessels and even perfusion in a tissue of breast, undoubtedly, soon will occupy the one of the conducting places in diagnostics of breast diseases.

  19. Physiological pulmonary branch stenosis in newborns: 2D-echocardiographic and Doppler characteristics and 4 months follow up

    Directory of Open Access Journals (Sweden)

    Amer Yazdanparast

    2004-02-01

    Full Text Available Transient systolic murmurs in neonates and premature infants due to mild left (LPA and right (RPA pulmonary branch stenosis is recognized but follow up studies are lacking. A total of 32 neonates with murmur and 32 controls were evaluated echocardiographically at baseline and in four months follow up. Diameters of LPA and RPA were smaller in patients with murmur. Colour-coded Doppler showed turbulent flow in LPA and RPA in 93% of patients and flow velocities of both pulmonary branches were significantly higher than in controls. The follow up study at 4 months showed absent (23% or decreased murmur (76%. Echocardiographically, absolute and relative diameters of LPA and RPA increased whereas the ratio of main pulmonary artery/aorta did not change suggesting accelerated growth or dilatation of the pulmonary branches. Thus, transient systolic murmurs in neonates are associated with temporary relative hypoplasia of the pulmonary branches which showed increased growth leading to disappearance of the murmur in most cases within 4 months of life.

  20. The pro-BNP Serum Level and Echocardiographic Tissue Doppler Abnormalities in Patients with Beta Thalassemia Major.

    Science.gov (United States)

    Garadah, Taysir S; Mahdi, Najat; Kassab, Salah; Shoroqi, Isa Al; Abu-Taleb, Ahmed; Jamsheer, Anwer

    2010-12-20

    Doppler echocardiographic studies of the left ventricle (LV) function in patients with β-Thalassemia Major (β-TM) had shown different patterns of systolic and diastolic dysfunctions associated with abnormal serum brain natriuretic peptide (BNP). This cross-sectional study was designed to study the LV systolic and diastolic functions and correlate that with serum level of N-terminal pro brain natriuretic hormone (NT- pro BNP) in patients with β-TM using Pulsed Doppler (PD) and Tissue Doppler (TD) echocardiography. The study was conducted on patients with β-TM (n = 38, age 15.7 ± 8.9 years) and compared with an age-matched controls (n = 38, age 15.9 ± 8.9 years). In all participants, PD and TD echocardiography were performed and blood samples were withdrawn for measuring the serum level of NT-pro BNP, ferritin, and alanine transaminase. Patients with β-TM compared with controls, have thicker LV septal wall index (0.65 ± 0.26 vs. 0.44 ± 0.21 cm, P pro-BNP in β-TM was significantly higher compared with controls (37.6 ± 14.73 vs. 5.5 ± 5.4pg/ml, P pro BNP that is positively correlated with the E/Em ratio on tissue Doppler. Furthermore, we confirm our previous findings that patients with β-TM exhibit LV diastolic pattern on echocardiogram suggestive of restrictive type with well preserved left ventricle systolic function.

  1. Associations between abnormal ultrasound color Doppler measures and tendon pain symptoms in badminton players during a season

    DEFF Research Database (Denmark)

    Boesen, Anders Ploug; Boesen, Morten Ilum; Torp-Pedersen, Soren

    2012-01-01

    Color Doppler ultrasound is widely used to examine intratendinous flow in individuals with overuse tendon problems, but the association between color Doppler and pain is still unclear.......Color Doppler ultrasound is widely used to examine intratendinous flow in individuals with overuse tendon problems, but the association between color Doppler and pain is still unclear....

  2. Study of retrobulbar hemodynamics in diabetes via color doppler ultrasound

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    Wei Chen

    2014-09-01

    Full Text Available AIM: To explore the changes of retrobulbar hemodynamics in diabetes via color doppler ultrasound. METHODS: Totally 80 patients(160 eyeswith eye diseases in type 2 diabetes from June 2010 to May 2013 in our hospital were enrolled as research group. By fundus photography and direct ophthalmoscopy, patients were assigned to diabetes without retinopathy group(DNR subgroup, non-proliferative diabetic retinopathy group(NPDR subgroupand proliferative diabetic retinopathy group(PDR subgroup. Of 60 healthy patients(120 eyesover the same period were chosen as control group. The doppler parameters of central retinal artery(CRA, posterior ciliary artery(PCAand ophthalmic artery(OAwere measured.RESULTS: There were significant differences on circulatory parameters of CRA, PCA and OA between both groups(PPPCONCLUSION: The monitoring of retinal blood flow and analysis of blood spectrum morphology via color doppler ultrasound can effectively evaluate the degree of diabetic retinopathy lesions, especially before DR vascular disease. Early detection can reveal the hemodynamic change pattern of DR, facilitating the prevention of diabetic eye complications and improvement of the quality of life.

  3. New approaches to the Doppler echocardiographic assessment of diastolic function: from research laboratory to clinical practice

    Science.gov (United States)

    Pasquet, A.; Garcia, M. J.; Thomas, J. D.

    1999-01-01

    Over the past decade, Doppler echocardiography has become a well-established tool for the diagnosis of left ventricular diastolic dysfunction. Unfortunately, in many clinical situations traditional Doppler indices of transmittal and pulmonary venous flow are inconclusive, primarily due to their dependence on left atrial pressure. Recently, new Doppler indices that are much less dependent on preload have been developed, based on intraventricular flow propagation and intrinsic myocardial velocity. These methodologies provide direct assessment of ventricular relaxation and the small intraventricular pressure gradients essential to efficient filling of the ventricle. We review in this article the theoretical and experiment background of these new echo techniques as well as how they can be implemented in routine clinical practice.

  4. Serial Doppler echocardiographic assessment of left and right ventricular performance after a first myocardial infarction

    DEFF Research Database (Denmark)

    Møller, J E; Søndergaard, E; Poulsen, S H

    2001-01-01

    a first myocardial infarction (MI). To do so, serial Doppler echocardiography was performed in 77 consecutive patients with a first MI. Right ventricular MPI correlated significantly with LV MPI (r = 0.51, P signs of RV MI, the RV MPI was significantly higher (0...

  5. Doppler echocardiographic evaluation of HIV-positive patients in different stages of the disease

    Directory of Open Access Journals (Sweden)

    Werneck Guilherme Lobosco

    1999-01-01

    Full Text Available OBJETIVE: To evaluate by Doppler echocardiography (DE early abnormalities of ventricular function in HIV-positive patients, as well as other cardiac abnormalities that can be detected by this method, with special emphasis on mitral valve flow. METHODS: 84 HIV- positive patients, 59 with CD4 cell count >500/mm³ (Group A and 25 with CD4 cell count 500/mm³ had no abnormalities by DE. Patients with a more advanced infection (those with a CD4 cell count <500/mm³, had a significantly abnormal LV systolic function and a higher incidence of pericardial effusion and mitral regurgitation. Mitral valve inflow by Doppler did not indicate diastolic dysfunction.

  6. Right Ventricular Doppler Echocardiographic Study of Indeterminate Form of Chagas Disease

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    Rogério Gomes Furtado

    2015-03-01

    Full Text Available Background: Patients with indeterminate form of Chagas disease/cardiac normality (ICD/CN exhibited normal electrocardiograms and chest X-rays; however, more sophisticated tests detected some degree of morphological and functional changes in the heart. Objective: To assess the prevalence of systolic and diastolic dysfunction of the right ventricle (RV in patients with ICD/CN. Methods: This was a case–control and prevalence study. Using Doppler two-dimensional echocardiography (2D, 92 patients were assessed and divided into two groups: group I (normal, n = 31 and group II (ICD/CN, n = 61. Results: The prevalence of RV systolic dysfunction in patients in groups I and II was as follows: fractional area change (0.0% versus 0.6%, mobility of the tricuspid annulus (0.0% versus 0.0%, and S-wave tissue Doppler (6.4% versus 26.0%, p = 0.016. The prevalence of global disorders such as the right myocardial performance index using tissue Doppler (16.1% versus 27.8%, p = 0.099 and pulsed Doppler (61.3% versus 68%, p = 0.141 and diastolic disorders such as abnormal relaxation (0.0% versus 6.0%, pseudonormal pattern (0.0% versus 0.0%, and restrictive pattern (0.0% versus 0.0% was not statistically different between groups. Conclusion: The prevalence of RV systolic dysfunction was estimated to be 26% (S wave velocity compared with other variables, suggesting incipient changes in RV systolic function in the ICD/CN group.

  7. Duplex Color Doppler Sonogram of the Orbital Diseases

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Kil Woo; Kim, Chul Soo; Park, Won [Hallym University College of Medicine, Chuncheon (Korea, Republic of)

    1996-06-15

    To evaluate the clinical significance of the color Doppler ultrasound at glaucoma and diseases associated with intraocular hypertension, diabetic retinopathy, central retinal vessel occlusion, and other ocular diseases. We performed color Doppler ultrasound in 194 eyes of the 121 patients consisting of 62 normal, 46 primary open angle glaucoma (POAG), 27 ocular hypertension (OH), 14 normotensive glaucoma (NTG), 13 secondary glaucoma (SG), 13 proliferating diaetic retinopathy (PDR), 10 central retinal venous obstruction (CRVO),5 retinal detachment, and 4 others. The ophthalmic artery flow velocity was measured with the real time Doppler ultrasound using 5{approx}10 MHz linear probe. Sample volume size ranged from 1 to 1.5 mm. Angle corrections were selected below 60 degree. Results were statistically analyzed with paired t-test. Mean peak systolic velocities in the ophthalmic and central retinal arteries among 62 normal eyes were 36.4 {+-} 1 cm / sec and 5.9 {+-}0.3 cm / sec. Mean peak systolic velocities were 32.4 {+-} 2 cm / sec in the POAG, 35.9 {+-} 2 cm / sec in OH, 32.9 {+-}4 cm / sec in the NTG, 42.6 {+-} 3 cm / sec in the PDR, 36.4 {+-} 3 cm / sec in the SG, and 35.2 {+-} 3 in the CRVO. Innormal subjects, mean peak systolic velocity in ophthalmic artery was decreased with increasing age but no statistically significant difference was seen with Paired t-test. Comparing flow velocities between the normal and the glaucomatous lesions showed statistically no significant difference for mean peak systolic velocity. No significant difference was noted between right and left eyes but significant difference between male and female patients with Paired t-test. Mean resistive indices were 0.73 in ophthalmic artery and 0.65 in central retinal artery. Mean sample volume settings were 3.1 cm in depth for ophthalmic artery and 2.7 cm in depth for centralretinal artery. Color Doppler ultrasonogram of the orbit could diagnose the carotid cavernous fistula and the retinal

  8. [Doppler color ultrasonography in the assessment of double kidney transplantation].

    Science.gov (United States)

    Selvaggio, Oscar; Martino, Pasquale; Palazzo, Silvano; Battaglia, Michele; Ditonno, Pasquale; Di Lorenzo, Vito; Selvaggi, Francesco Paolo

    2002-12-01

    In our Transplant Centre, in the last three years, twelve patients with chronic kidney disease underwent a "double kidney" transplant according to Masson technique. Our purpose is the evaluation of ultrasonography and echo-colorDoppler ultrasound in the diagnosis of possible clinical and surgical complications of "double kidney" transplant. The "double kidney" transplant inclusion criteria are the following: donor age > 70 yrs; glomerulosclerosis > 20%; histological score (according to Kandinsky) > 4 and 0.80 (mean 0.82); patients without DGF (group B) had an IR < 0.80 (mean 0.68 and 0.65) (p < 0.05). All patients underwent an eco colorDoppler evaluation after 3 and 6 months; in both groups (A and B) IR was, respectively, 0.75 and 0.71. Surgical adverse events were 41.6% (5/12): 3 urinary obstructions; 1 thrombosis of renal vein; 1 pelvic lymphocele. In all these patients the first diagnostic step was ultrasonography. Ultrasonography, in "double transplant" as in single one, have a very important role in post-transplant evaluation of DGF and surgical complications.

  9. Prediction of placenta accreta by ultrasonography and color Doppler imaging.

    Science.gov (United States)

    Woodring, T Casey; Klauser, Chad K; Bofill, James A; Martin, Rick W; Morrison, John C

    2011-01-01

    To determine the accuracy of ultrasound and color flow Doppler to diagnose placenta accreta. Respectively, ultrasound images consistent with signs of placenta accreta (concomitant previa, numerous vascular lacunae, absent lower uterine segment between bladder-placenta, turbulent or complicated blood flow at the uteroplacental interface) were correlated with findings at the time of surgery and pathologic examination. Over 64 months, 12 cases with suspected placenta accreta by ultrasound were studied. The median gestational age at first diagnosis was 25 weeks and 92% had a previa while all had at least one previous cesarean delivery. At surgery, 83% (10/12) had an adherent placenta requiring hysterectomy (eight accreta, one increta, and one percreta). There were two false positives (one complete previa, one low-lying placenta with vasa previa). Nine of 12 women (75%) required blood transfusions due to a mean hematocrit nadir of 22.7 ± 4.6%. The mean number of packed red blood cell units transfused was 4.9 ± 4.7 units (range 2-17 units). Sonography coupled with color-flow Doppler appears helpful in allowing antenatal diagnosis of accreta.

  10. Doppler echocardiographic study in adolescents and young adults with sickle cell anemia

    Directory of Open Access Journals (Sweden)

    Wolney de Andrade Martins

    1999-12-01

    Full Text Available OBJECTIVE: Anatomical and functional assessment of the heart through Doppler and echocardiography in patients with cell anemia (SCA. METHODS: Twenty-five patients with SCA and ages ranging from 14 to 45 years were prospectively studied in a comparison with 25 healthy volunteers. All of them underwent clinical and laboratory evaluation and Doppler echocardiography as well.The measurements were converted into body surface indices. RESULTS: There were increases in all chamber diameters and left ventricle (LV mass of the SCA patients. It was characterised an eccentric hypertrophy of the left ventricle. The preload was increased (left ventricle end-diastolic volume and the afterload was decreased (diastolic blood pressure, peripheral vascular resistance and end-systolic parietal stress ESPS. The cardiac index was increased due to the stroke volume. The ejection fraction and the percentage of the systolic shortening , as well as the systolic time intervals of the LV were equivalent. The isovolumetric contraction period of the LV was increased. The mitral E-septum distance and the end-systolic volume index (ESVi were increased. The ESPS/ESVi ratio,a loading independent parameter, was decreased in SCA, suggesting systolic dysfunction. No significant differences in the diastolic function or in the pulmonary pressure occurred. CONCLUSION: Chamber dilations, eccentric hypertrophy and systolic dysfunction confirm the evidence of the literature in characterizing a sickle cell anemia cardiomyopathy.

  11. Influence of myocardial infarction size on radionuclide and Doppler echocardiographic measurements of diastolic function

    Energy Technology Data Exchange (ETDEWEB)

    Johannessen, K.A.; Cerqueira, M.D.; Stratton, J.R. (Seattle Veterans Administration Medical Center, WA (USA))

    1990-03-15

    To assess the relation between myocardial infarction size and diastolic function as measured by radionuclide ventriculography and Doppler echocardiography, 83 patients (aged 58 +/- 9 years) without significant valvular disease were studied 8 to 12 weeks after an acute myocardial infarction. Myocardial infarction size was measured by resting thallium-201 tomography. Peak early filling rate (in end-diastolic volumes/s) was measured by gated blood pool scintigraphy. Doppler measures of mitral inflow were peak early (E) and atrial (A) filling velocities, slopes of E and A, percent E and A filling, E/A ratio and diastolic filling period. In univariate analyses, there was a significant inverse correlation between infarction size and the peak early filling rate (r = -0.59, p less than 0.001), and this remained significant (r = -0.63, p less than 0.0001) in an analysis that included 2 other determinants of the filling rate, age and diastolic filling period. Infarction size was directly correlated to the peak E velocity (r = 0.37, p less than 0.01), deceleration of E (r = 0.41, p less than 0.01) and percent E filling (r = 0.31, p less than 0.01), and was inversely correlated to peak A (r = -0.27, p less than 0.05) and percent A filling (r = -0.26, p less than 0.05).

  12. Dynamic color Doppler sonography in the assessment of erectile dysfunctions; Utilizzazione dell'eco color Doppler dinamico del pene nello studio delle disfunzioni erettili

    Energy Technology Data Exchange (ETDEWEB)

    Aversa, A.; Bonifacio, V.; Isidori, A.; Fabbri, A. [Rome Univ. (Italy). Cattedra di Andrologia. Dipt. di Fisiopatologia Medica; Bertucci, B. [Azienda Ospedaliera Pugliese Ciaccio, Catanzaro (Italy). Servizio di Radiologia

    1999-06-01

    The authors investigated the diagnostic accuracy of dynamic color Doppler sonography (D-CDS) in men with erectile dysfunctions (ED). Terminal microcirculation alterations and their correlation with erectile response after drug testing were investigated with power Doppler energy. Penile sonography in the flaccid state can show calcificic plaques and/or fibrosis of the corpora. Redosing of PGE{sub 1} plus phentolamine during D-CDS is a safe procedure and improves diagnostic accuracy in erectile dysfunctions, with significantly fewer non-responders than redosing of PGE{sub 1} alone. Power Doppler energy shows altered morphology of helicine arterioles otherwise missed at color Doppler and is thus recommended to make an accurate diagnosis in some men with erectile dysfunctions. [Italian] Scopo dello studio e' quello di valutare l'accuratezza diagnostica dell'eco color Doppler dinamico del pene nei soggetti affetti da disfunzione erettile. Inoltre si e' voluto verificale la presenza di alterazioni della vascolarizzazione arteriosa terminale con modulo power Doppler e come la presenza di queste alterazioni del microcircolo si correlino con la risposta erettiva della farmacoinfusione intracavernosa. Con l'eco color Doppler penieno basale e' possibile identificare placche calcifiche e/o fibrosi nei corpi cavernosi. Durante la fase dinamica con color Doppler , la re-iniezione con PGE{sub 1} e fentolamina si e' dimostrata sicura e ha migliorato l'accuratezza diagnostica riducendo il numero di soggetti con mancata risposta erettiva rispetto alla sola PGE{sub 1}. Con power Doppler sono state identificate alterazioni morfologiche delle arterioleelicine non visibili con il color Doppler consentendo la diagnosi piu' precisain alcuni casi di disfunzione erettile.

  13. Association between Clinical and Doppler Echocardiographic Parameters with Sudden Death in Hemodialysis Patients

    Directory of Open Access Journals (Sweden)

    Silvio Henrique Barberato

    2016-01-01

    Full Text Available Abstract Background: Sudden cardiac death (SCD is the leading cause of death in maintenance hemodialysis (HD patients, but there is little information about underlying risk factors. Objectives: Evaluate the association between clinical and echocardiographic variables with SCD on HD patients. Methods: Retrospective nested case-control study on chronic HD patients who were prospectively followed. The primary endpoint was SCD. Variables were compared by Student t test, Mann-Whitney or Chi-Square, and independent predictors of SCD were evidenced by multivariate logistic regression. Results: We followed 153 patients (50 ± 15 years, 58% men for 23 ± 14 months and observed 35 deaths, 17 of which were SCD events. When compared to the control group (matched for gender, age, and body mass index there were no differences regarding time on dialysis, traditional biochemical parameters, blood pressure, smoking, use of cardiovascular protective drugs, ejection fraction, left ventricular dimensions, and diastolic function indices. On the other hand, in the SCD group, we found a higher prevalence of previous heart failure, acute myocardial infarction and diabetes, greater left ventricular mass index, greater left atrial size and lower global myocardial performance. After multivariate logistic regression analysis, diabetes (OR = 2.6; CI = 1.3-7.5; p = 0.023 and left ventricular mass index ≥ 101 g/m2.7 (OR = 1.04; CI = 1.01-1.08; p = 0.028 showed independent association with SCD events. Conclusions: HD patients with diabetes mellitus and left ventricular hypertrophy appear to have the highest risk of SCD. Preventive and therapeutic strategies should be encouraged in addressing these risk factors to minimize the occurrence of SCD in HD patients.

  14. Inverse Problem for Color Doppler Ultrasound-Assisted Intracardiac Blood Flow Imaging

    Directory of Open Access Journals (Sweden)

    Jaeseong Jang

    2016-01-01

    Full Text Available For the assessment of the left ventricle (LV, echocardiography has been widely used to visualize and quantify geometrical variations of LV. However, echocardiographic image itself is not sufficient to describe a swirling pattern which is a characteristic blood flow pattern inside LV without any treatment on the image. We propose a mathematical framework based on an inverse problem for three-dimensional (3D LV blood flow reconstruction. The reconstruction model combines the incompressible Navier-Stokes equations with one-direction velocity component of the synthetic flow data (or color Doppler data from the forward simulation (or measurement. Moreover, time-varying LV boundaries are extracted from the intensity data to determine boundary conditions of the reconstruction model. Forward simulations of intracardiac blood flow are performed using a fluid-structure interaction model in order to obtain synthetic flow data. The proposed model significantly reduces the local and global errors of the reconstructed flow fields. We demonstrate the feasibility and potential usefulness of the proposed reconstruction model in predicting dynamic swirling patterns inside the LV over a cardiac cycle.

  15. Percutaneous intracoronary delivery of SERCA gene increases myocardial function: a tissue Doppler imaging echocardiographic study.

    Science.gov (United States)

    Logeart, Damien; Vinet, Laurent; Ragot, Thierry; Heimburger, Michèle; Louedec, Liliane; Michel, Jean-Baptiste; Escoubet, Brigitte; Mercadier, Jean-Jacques

    2006-10-01

    The aim of this study was to examine the efficiency of adenovirus-mediated overexpression of sarco(endo)plasmic reticulum Ca(2+)-ATPase (SERCA1a) gene in a realistic model based on percutaneous intracoronary delivery and on noninvasive functional monitoring. Catheter-based selective coronary delivery of saline or adenoviruses (Ad.CMV.SERCA1a or Ad.CMV.lacZ, 10(10) plaque-forming units) was performed in the circumflex artery of rabbits. Effects were assessed and compared by using serial Doppler echocardiography, hemodynamics, and measurements of SERCA protein and Ca(2+) uptake activity. On day 3, a 21% increase in SERCA proteins and a 37% increase in the maximal rate of Ca(2+) uptake were observed in the transfected left ventricular (LV) walls of Ad.CMV.SERCA1a rabbits. Baseline hemodynamics and conventional echographic measurements of global LV function were poorly affected. In contrast, tissue Doppler imaging (TDI) was able to assess a strong increase in the baseline function of transfected LV walls, as assessed with maximal wall velocities (+32% and +43%, respectively) and strain rates (+18% and +30%, respectively). TDI parameters were closely related to the maximal rate of Ca(2+) uptake (r(2) = 0.68 for the systolic strain rate). Serial TDI analysis during follow-up showed that the effects lasted for 7 days and were no longer detectable 15 days after adenoviruses injection. In conclusion, LV function can be increased by adenovirus-mediated overexpression of SERCA in a clinically relevant model, and TDI provides an accurate and noninvasive tool for monitoring effects on global as well as regional myocardial function.

  16. Benign versus malignant lymphadenopathy : the usefulness of color doppler sonography

    Energy Technology Data Exchange (ETDEWEB)

    Chang, Yun Woo; Hong, Hyun Sook; Park, Jae Ho; Lee, Yong Il; Lee, Hae Kyung; Kwon, Kui Hyang; Choi, Deuk Lin [Soonchunhyang Univ. Hospital, Asan (Korea, Republic of)

    1999-04-01

    To evaluate the vascular pattern of lymph nodes, and the usefulness of color Doppler sonogaphy in differentiating benign from malignant superficial lymphadenopathy. Twenty-six patients were pathologically and clinically confirmed to be suffering from benign reactive lymphadenitis and tuberculosis (n=16) or lymphoma and malignant lymphadenitis (n=10). Lymph node shape was assessed by the ratio of longitudinal diameter to transverse diameter(L/T), and patients were thus assigned to one of two groups : L/T{>=}2, or L/T<2. The hilar vascular pattern of lymph node was assessed by color Doppler sonography and classified as central, eccentric, or absent. On the basis of peripheral vascularity, patients were divided into three groups according to circumferental linear vascularity. An absence of peripheral vascularity was classified as grade 0. If less than half the periphery was covered by linear vascularity, a patient was assigned to as grade I, and if more than half was covered by a vessel, the classification was grade II. Statistically significant differences in L/T ratio were noted between malignant and benign node (p<.001). Of the 16 benign reactive nodes, 13 showed L/T{>=}2, and 3 L/T<2. while in nine of the ten malignant nodes, L/T<2 was noted. Among 16 benign reactive nodes, hilar vascularity was central in 13, eccentric in one, and absent in two. Among the ten malignant nodes, the corresponding totals were nil, four, and Six. The hilar vascular pattern showed statistically significant differentiation between malignant and benign node (p<.05). Among 16 benign reactive nodes, 13 were grade 0, two were grade I, and one was grade II, while among ten malignant nodes, two were grade 0 and eight were grade I. On the basis of vascular pattern, the difference between benign and malignant nodes was statistically significant (p<.05). L/T ratio<2, absent or eccentric hilar vascularity, and the presence of peripheral vascularity are suggestive of malignant lymph node. The

  17. Discrimination between pleural thickening and minimal pleural effusion using color Doppler chest ultrasonography

    Directory of Open Access Journals (Sweden)

    Ali A. Hasan

    2013-07-01

    Conclusions: Application of color Doppler examination increases the accuracy of real time chest ultrasound to discriminate pleural thickening from minimal pleural effusion and hence color Doppler examination proved to be a useful diagnostic tool to real-time gray-scale ultrasound for diagnosis of minimal pleural effusion.

  18. Color and power Doppler combined with Fetal Intelligent Navigation Echocardiography (FINE) to evaluate the fetal heart.

    Science.gov (United States)

    Yeo, L; Romero, R

    2017-10-01

    To evaluate the performance of color and bidirectional power Doppler ultrasound combined with Fetal Intelligent Navigation Echocardiography (FINE) in examining the fetal heart. A prospective cohort study was conducted of fetuses in the second and third trimesters with a normal heart or with congenital heart disease (CHD). One or more spatiotemporal image correlation (STIC) volume datasets, combined with color or bidirectional power Doppler (S-flow) imaging, were acquired in the apical four-chamber view. Each successfully obtained STIC volume was evaluated by STICLoop™ to determine its appropriateness before applying the FINE method. Visualization rates for standard fetal echocardiography views using diagnostic planes and/or Virtual Intelligent Sonographer Assistance (VIS-Assistance®) were calculated for grayscale (removal of Doppler signal), color Doppler and S-flow Doppler. In four cases with CHD (one case each of tetralogy of Fallot, hypoplastic left heart and coarctation of the aorta, interrupted inferior vena cava with azygos vein continuation and asplenia, and coarctation of the aorta with tricuspid regurgitation and hydrops), the diagnostic potential of this new technology was presented. A total of 169 STIC volume datasets of the normal fetal heart (color Doppler, n = 78; S-flow Doppler, n = 91) were obtained from 37 patients. Only a single STIC volume of color Doppler and/or a single volume of S-flow Doppler per patient were analyzed using FINE. Therefore, 60 STIC volumes (color Doppler, n = 27; S-flow Doppler, n = 33) comprised the final study group. Median gestational age at sonographic examination was 23 (interquartile range, 21-27.5) weeks. Color Doppler FINE generated nine fetal echocardiography views (grayscale) using (1) diagnostic planes in 73-100% of cases, (2) VIS-Assistance in 100% of cases, and (3) a combination of diagnostic planes and/or VIS-Assistance in 100% of cases. The rate of generating successfully eight fetal echocardiography views

  19. Color doppler US findings of gestational trophoblastic disease

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Jae Hee; Lee, Myung Hee; Kim, Jee Young; Jung, Jae Keun; Shin, Kyung Sub [Catholic University College of Medicine, Seoul (Korea, Republic of)

    1994-12-15

    The purpose of this study were to evaluate the findings of gestational trophoblastic disease(GTD) at color Doppler imaging (CDI) and to assess the role of CDI in differentiating gestational trophoblastic tumor (GTT) from hydatidiform mole (H-mole). CDI findings of 18 patients with H-mole and 52 patients with GTT were reviewed. Masswas detected in 43(82,7%) patients with GTT. Thirty seven out of 43 masses showed varying degree of intratumoral flows. mean resistive index (RI) of intratumoral flow was 0.39+0.15. H-mole manifestated as a characteristic vesicular mass in 6 patients without history of curretage, while there was no definable mass in 12 patients with history of curretage. The masses of H-mole did not show intratumoral flow. Hypervascularity of adnexae was detected in 44 (84.6%) patients with GTT, whereas only six (33.3%) patients with H-mole showed minimalhypervascularity of adnexae. Mean RI of uterine arteries was 0.69+0.13 in GTT and 0.70+0.15 in H-mole. CDI findings of mass in the uterus, hypervascularity of adnexal region and intramural vessels in patients suspected to have GTD clinically, may suggest GTT. In conclusion, CDI was helpful in the diagnosis of GTD and the differentiation between H-mole and GTT

  20. Significance of CT scan and color Doppler duplex ultrasound in the assessment of Abernethy malformation

    National Research Council Canada - National Science Library

    Nacif, Lucas Souto; Paranaguá-Vezozzo, Denise Cerqueira; Galvão, Flávio Henrique Ferreira; Rocha, Manoel S; Andraus, Wellington; Carrilho, Flair Jose; D'Albuquerque, Luiz Carneiro

    2015-01-01

    .... In this study we highlight the significance of the use of CT scans and Color Doppler Duplex Ultrasound for the diagnosis, treatment and evolution assessment in two adults with Abernethy malformation...

  1. Velocity-estimation accuracy and frame-rate limitations in color Doppler optical coherence tomography

    NARCIS (Netherlands)

    Kulkarni, M. D.; van Leeuwen, T. G.; Yazdanfar, S.; Izatt, J. A.

    1998-01-01

    Color Doppler optical coherence tomography (CDOCT) is a recent innovation that allows spatially localized flow-velocity mapping simultaneously with microstructural imaging. We present a theoretical model for velocity-image formation in CDOCT. The proportionality between the heterodyne detector

  2. Using rotation for steerable needle detection in 3D color-Doppler ultrasound images.

    Science.gov (United States)

    Mignon, Paul; Poignet, Philippe; Troccaz, Jocelyne

    2015-08-01

    This paper demonstrates a new way to detect needles in 3D color-Doppler volumes of biological tissues. It uses rotation to generate vibrations of a needle using an existing robotic brachytherapy system. The results of our detection for color-Doppler and B-Mode ultrasound are compared to a needle location reference given by robot odometry and robot ultrasound calibration. Average errors between detection and reference are 5.8 mm on needle tip for B-Mode images and 2.17 mm for color-Doppler images. These results show that color-Doppler imaging leads to more robust needle detection in noisy environment with poor needle visibility or when needle interacts with other objects.

  3. Studi Penentuan Kecepatan Aliran Darah dan Frekuensi Terimaan Pasien Atherosclerosis Menggunakan USG Color Doppler

    OpenAIRE

    Mulyani, Emba

    2014-01-01

    Jurnal Fisika Medik Studi Penentuan Kecepatan Aliran Darah dan Frekuensi Terimaan Pasien Atherosclerosis Menggunakan USG Color Doppler Mulyani H211 08 507 Pembimbing Utama Sri Dewi Astuty Ilyas,Ssi, Msi Nip.19750513 199903 2 001 Pembimbing Pertama Dahlang Tahir, Msi, Ph.D Nip.19750907 200003 1 001 ABSTRACT Research about Study of determination blood speed of current and freq uency give patient atherosclero sis uses plane USG Color Doppler had be...

  4. Significance of color doppler ultrasonography in the assessment of pancreatic carcinoma vascular invasion

    Directory of Open Access Journals (Sweden)

    Alempijević Tamara

    2006-01-01

    Full Text Available Background/Aim. It is highly appreciated to provide exact data on vascular invasion of pancreatic carcinoma relying as much as possible on non-invasive diagnostic procedures. Color Doppler ultrasonography has been proven as an efficient method for clinical staging of pancreatic carcinoma essential for therapeutic decisions. The aim of this study was to provide an analysis of the sensitivity and specificity for color Doppler ultrasonography in patients suffering from pancreatic carcinoma. Methods. We performed color Doppler ultrasonography examination in 43 patients with pancreatic carcinoma prior to the surgery. The findings of ultrasonography on neoplasm vascular invasion were correlated to the findings obtained during the subsequent surgical procedures. An estimation of neoplastic invasion of certain blood vessels including portal vein, celiac trunk, and superior mesenteric artery and vein is critical for decision making regarding surgical treatment. The patients with metastases of pancreatic carcinoma were excluded from the study. Results. Comparing color Doppler and the surgical findings we estimated the sensitivity for detection of neoplastic vascular invasion ranging from 79−93%, whereas the specificity range was from 83−93%. Conclusion. Color Doppler ultrasonography is a sufficiently sensitive and specific method for evaluation of vascular invasion in pancreatic carcinoma patients. Since color Doppler ultrasonography is a non-invasive, radiation free, and inexpensive diagnostic tool, considering also the results of this and similar studies we could strongly recommend its use for an initial presurgical evaluation of vascular invasion in pancreatic carcinoma patients.

  5. Color Doppler ultrasound characteristics after subinguinal microscopic varicocelectomy.

    Science.gov (United States)

    Akand, Murat; Koplay, Mustafa; Islamoglu, Necat; Altintas, Emre; Kilic, Ozcan; Gul, Murat; Kulaksizoglu, Haluk; Sivri, Mesut; Goktas, Serdar

    2017-01-31

    The present study evaluated the effect of differences in the peak systolic velocity (PSV) and resistive index (RI) in the testicular artery (TA), capsular artery (CA), and intratesticular artery (ITA) after microscopic subinguinal varicocelectomy (MSV) on postoperative pain and semen parameters. Scrotal color Doppler ultrasound (CDUS) measurements were made in 33 patients (age 18-31 years) prior to MSV and 3 and 6 months after MSV. Pain was recorded using a visual analog scale and sperm concentration was determined to analyze the predictive value of the CDUS parameters regarding surgical outcome. A significant decrease in pain scores was observed in most patients at both follow-ups. The first postoperative CDUS revealed a significant increase in the TA-PSV (pPSV and a decrease in the TA-RI, and the PSV in the ITA and CA and RI in the ITA and CA were significantly different from the values obtained pre-operatively and at the first follow-up. A negative correlation was found between the pain level and TA-PSV (r=-0.433, p=0.012), whereas sperm concentration positively correlated with both the TA-PSV and CA-PSV (r=0.534, p=0.001 and r=0.455, p=0.008, respectively). The PSV and RI are useful parameters for detecting changes in testicular microhemodynamics after MSV. In addition, the TA-PSV and CA-PSV can be used to predict improvements in pain and sperm concentration.

  6. Device to enhance visibility of needle or catheter tip at color Doppler US.

    Science.gov (United States)

    Cockburn, J F; Cosgrove, D O

    1995-05-01

    The authors tested a device that allows the tip of a needle to be visualized at color Doppler ultrasonography. The device directs an oscillating air column through a 0.016-inch inner-diameter hollow stylet, creating movement at only the needle tip. The movement is reliably and accurately displayed as a beacon of color at depths of 15 cm in vitro.

  7. A new fringeline-tracking approach for color Doppler ultrasound imaging phase unwrapping

    Science.gov (United States)

    Saad, Ashraf A.; Shapiro, Linda G.

    2008-03-01

    Color Doppler ultrasound imaging is a powerful non-invasive diagnostic tool for many clinical applications that involve examining the anatomy and hemodynamics of human blood vessels. These clinical applications include cardio-vascular diseases, obstetrics, and abdominal diseases. Since its commercial introduction in the early eighties, color Doppler ultrasound imaging has been used mainly as a qualitative tool with very little attempts to quantify its images. Many imaging artifacts hinder the quantification of the color Doppler images, the most important of which is the aliasing artifact that distorts the blood flow velocities measured by the color Doppler technique. In this work we will address the color Doppler aliasing problem and present a recovery methodology for the true flow velocities from the aliased ones. The problem is formulated as a 2D phase-unwrapping problem, which is a well-defined problem with solid theoretical foundations for other imaging domains, including synthetic aperture radar and magnetic resonance imaging. This paper documents the need for a phase unwrapping algorithm for use in color Doppler ultrasound image analysis. It describes a new phase-unwrapping algorithm that relies on the recently developed cutline detection approaches. The algorithm is novel in its use of heuristic information provided by the ultrasound imaging modality to guide the phase unwrapping process. Experiments have been performed on both in-vitro flow-phantom data and in-vivo human blood flow data. Both data types were acquired under a controlled acquisition protocol developed to minimize the distortion of the color Doppler data and hence to simplify the phase-unwrapping task. In addition to the qualitative assessment of the results, a quantitative assessment approach was developed to measure the success of the results. The results of our new algorithm have been compared on ultrasound data to those from other well-known algorithms, and it outperforms all of them.

  8. Ultrasonographic investigation of the Achilles tendon in elite badminton players using color Doppler.

    Science.gov (United States)

    Boesen, Morten Ilum; Boesen, Anders; Koenig, Merete Juhl; Bliddal, Henning; Torp-Pedersen, Soren

    2006-12-01

    The most frequent injuries in badminton players are in the lower extremities, especially in the Achilles tendon. The game of badminton may be related to abnormal intratendinous flow in the Achilles tendon as detected by color Doppler ultrasound. To a certain extent, this blood flow might be physiological, especially when examined after match. Cohort study (prevalence); Level of evidence, 3. Seventy-two elite badminton players were interviewed regarding Achilles tendon pain (achillodynia) in the preceding 3 years. Color Doppler was used to examine the tendons of 64 players before their matches and 46 players after their matches. Intratendinous color Doppler flow was graded from 0 to 4. The Achilles tendon was divided into dominant (eg, right side for right-handed players and vice versa) and nondominant side and classified as midtendon, preinsertional, and calcaneal areas. Of 72 players, 26 had experienced achillodynia in 34 tendons, 18 on the dominant side and 16 on the nondominant side. In 62% of the players with achillodynia, the problems had begun slowly, and the median duration of symptoms was 4 months (range, 0-36 months). Thirty-five percent had ongoing pain in their tendons for a median duration of 12 months (range, 0-12 months). Achillodynia was not associated with the self-reported training load or with sex, age, weight, singles or doubles players, or racket side. Forty-six players were scanned before and after match. At baseline, color Doppler flow was present in the majority of players, and only 7 (16%) players had no color Doppler flow in either tendon. After match, all players had some color Doppler flow in 1 or both tendons. Achillodynia and color Doppler flow were related in the nondominant Achilles tendon (chi-square, P = .008). The grades of Doppler flow also increased significantly after match in the preinsertional area in both the nondominant (P = .0002) and dominant (P = .005) side tendons. A large proportion of the players had experienced

  9. Direct measurement of proximal isovelocity surface area by single-beat three-dimensional color Doppler echocardiography in mitral regurgitation: a validation study.

    Science.gov (United States)

    de Agustín, Jose Alberto; Marcos-Alberca, Pedro; Fernandez-Golfin, Covadonga; Gonçalves, Alexandra; Feltes, Gisela; Nuñez-Gil, Ivan Javier; Almeria, Carlos; Rodrigo, Jose Luis; Perez de Isla, Leopoldo; Macaya, Carlos; Zamorano, Jose

    2012-08-01

    The two-dimensional (2D) proximal isovelocity surface area (PISA) method has some technical limitations, mainly the geometric assumptions of PISA shape required to calculate effective regurgitant orifice area (EROA). Recently developed single-beat, real-time three-dimensional (3D) color Doppler imaging allows direct measurement of PISA without geometric assumptions. The aim of this study was to validate this novel method in patients with chronic mitral regurgitation (MR). Thirty-three patients were included, 25 (75.7%) with degenerative MR and eight (24.2%) with functional MR. EROA and regurgitant volume were assessed using transthoracic 2D and 3D PISA methods. The quantitative Doppler method and 3D transesophageal echocardiographic planimetry of EROA were used as reference methods. Both EROA and regurgitant volume assessed using the 3D PISA method had better correlations with the reference methods than conventional 2D PISA. A consistent significant underestimation of EROA and regurgitant volume using 2D PISA was observed, particularly in the assessment of eccentric jets. On the basis of 3D transesophageal echocardiographic planimetry of EROA, 14 patients had severe MR (EROA ≥ 0.4 cm(2)). Of these 14 patients, 42.8% (6 of 14) were underestimated as having nonsevere MR (EROA ≤ 0.4 cm(2)) by the 2D PISA method. In contrast, the 3D PISA method had 92.9% (13 of 14) agreement with 3D transesophageal planimetry in classifying severe MR. Good intraobserver and interobserver agreement for 3D PISA measurements was observed, with intraclass correlation coefficients of 0.96 and 0.92, respectively. Direct measurement of PISA without geometric assumptions using single-beat, real-time 3D color Doppler echocardiography is feasible in the clinical setting. MR quantification using this methodology is more accurate than the conventional 2D PISA method. Copyright © 2012 American Society of Echocardiography. Published by Mosby, Inc. All rights reserved.

  10. Acute pulmonary thromboembolism in emergency room: gray-scale versus color doppler ultrasound evaluation.

    Science.gov (United States)

    Ghanem, Maha Kamel; Makhlouf, Hoda Ahmed; Hasan, Ali Abdel-Azeem; Alkarn, Ahmed Atef

    2018-02-01

    Pulmonary thromboembolism (PTE) remains under-diagnosed fatal disease at emergency units suggesting the need for alternative, easy, and noninvasive bedside diagnostic approaches. To determine the diagnostic role of gray-scale and color Doppler transthoracic ultrasonography (TUS) in patients with PTE. Blinded to 64 multi-detectors CT pulmonary angiography (MDCTPA) examination as a gold standard, 60 patients with clinically suspected PTE underwent gray-scale and then color Doppler TUS examination. Results were compared and diagnostic accuracy of TUS was assessed. Forty patients proved to have PTE by MDCTPA. TUS showed typical lesions in 33 patients with the mean of 2 lesions per patient. Most lesions were hypoechoic, wedge- shaped, and pleural- based and the majority (80%) was located in the lower lobes. Consolidation with little perfusion was detected by Color Doppler ultrasound in 97% of lesions. Isolated central PTE was significantly higher in TUS negative patients. For gray -scale TUS, sensitivity, specificity, positive and negative predictive values and accuracy were 82%, 90%, 94%, 72%, and 85%. Meanwhile the sensitivity, specificity, positive and negative predictive values and accuracy of color Doppler TUS were 80%, 95%, 97%, 70% and 87%, respectively. TUS is a reliable diagnostic bedside test for PTE in critically ill and immobile patients. Adding color Doppler to gray-scale TUS increases the specificity and accuracy and consequently the confidence in the diagnosis of peripheral pulmonary infarctions and differentiates them from other pulmonary lesions that allow initiation of anticoagulants. © 2016 John Wiley & Sons Ltd.

  11. Cardiac Time Intervals by Tissue Doppler Imaging M-Mode: Normal Values and Association with Established Echocardiographic and Invasive Measures of Systolic and Diastolic Function.

    Directory of Open Access Journals (Sweden)

    Tor Biering-Sørensen

    Full Text Available To define normal values of the cardiac time intervals obtained by tissue Doppler imaging (TDI M-mode through the mitral valve (MV. Furthermore, to evaluate the association of the myocardial performance index (MPI obtained by TDI M-mode (MPITDI and the conventional method of obtaining MPI (MPIConv, with established echocardiographic and invasive measures of systolic and diastolic function.In a large community based population study (n = 974, where all are free of any cardiovascular disease and cardiovascular risk factors, cardiac time intervals, including isovolumic relaxation time (IVRT, isovolumic contraction time (IVCT, and ejection time (ET were obtained by TDI M-mode through the MV. IVCT/ET, IVRT/ET and the MPI ((IVRT+IVCT/ET were calculated. We also included a validation population (n = 44 of patients who underwent left heart catheterization and had the MPITDI and MPIConv measured.IVRT, IVRT/ET and MPI all increased significantly with increasing age in both genders (p<0.001 for all. IVCT, ET, IVRT/ET, and MPI differed significantly between males and females, displaying that women, in general exhibit better cardiac function. MPITDI was significantly associated with invasive (dP/dt max and echocardiographic measures of systolic (LVEF, global longitudinal strain and global strainrate s and diastolic function (e', global strainrate e(p<0.05 for all, whereas MPIConv was significantly associated with LVEF, e' and global strainrate e (p<0.05 for all.Normal values of cardiac time intervals differed between genders and deteriorated with increasing age. The MPITDI (but not MPIConv is associated with most invasive and established echocardiographic measures of systolic and diastolic function.

  12. The impacts of piezoelectric element's defects on color and power doppler images

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Kyung Sung [Dept. of Radiotechnology, Cheju Halla University, Cheju (Korea, Republic of)

    2015-12-15

    An ultrasound probe has a big impact on Doppler images even though it has very high risk of frequent function-breakdowns occurring in medical ultrasound scanners. This study experimentally analyses the impacts of an ultrasonic probe’s defected elements on power and color Doppler images. The results show that, the bigger the size of defected probe elements is, and the closer a group of action elements is to the center, the more the brightness of images and the velocity of Doppler diminish. When elements’ defects increase in color and power Doppler images, false images are formed to be mistaken for blood-vessel plaque in neighboring regions. Accordingly, whenever element defects are suspected, we need check-up process in B-mode. From this respective, it is advisable to have primary interest in a probe and carry out continuous probe QA for ultrasonography.

  13. Ultrasonography and color Doppler in juvenile idiopathic arthritis

    DEFF Research Database (Denmark)

    Laurell, Louise; Court-Payen, Michel; Nielsen, Susan

    2012-01-01

    The wrist region is one of the most complex joints of the human body. It is prone to deformity and functional impairment in juvenile idiopathic arthritis (JIA), and is difficult to examine clinically. The aim of this study was to evaluate the role of ultrasonography (US) with Doppler in diagnosis...

  14. Color Doppler Ultrasonography-Targeted Perforator Mapping and Angiosome-Based Flap Reconstruction

    DEFF Research Database (Denmark)

    Gunnarsson, Gudjon Leifur; Tei, Troels; Thomsen, Jørn Bo

    2016-01-01

    Knowledge about perforators and angiosomes has inspired new and innovative flap designs for reconstruction of defects throughout the body. The purpose of this article is to share our experience using color Doppler ultrasonography (CDU)-targeted perforator mapping and angiosome-based flap reconstr......Knowledge about perforators and angiosomes has inspired new and innovative flap designs for reconstruction of defects throughout the body. The purpose of this article is to share our experience using color Doppler ultrasonography (CDU)-targeted perforator mapping and angiosome-based flap...

  15. Color Doppler sonography as an adjunct to repeat uterine evacuation for gestational trophoblastic disease: case report.

    Science.gov (United States)

    Tsuyoshi, Hideaki; Sugita, Genki; Kurokawa, Tetsuji; Yoshida, Yoshio

    2013-01-01

    Repeat uterine evacuation is a therapeutic option for preserving fertility in patients with gestational trophoblastic neoplasms and chemoresistance, but remains controversial due to the risks of hemorrhage and perforation. A 25-year-old patient with low-risk gestational trophoblastic neoplasm became chemoresistant; however, chemotherapy reduced intrauterine tumor vascularity as observed by color Doppler sonography, suggesting that patients could undergo uterine evacuation without major risk of bleeding. After 18 months, she achieved a normal pregnancy. Serial assessment of tumor vascularity with color Doppler sonography may provide information regarding the appropriate time to perform a repeat uterine evacuation without significant bleeding. Copyright © 2013 Wiley Periodicals, Inc.

  16. Color Doppler Score: A New Approach for Monitoring a Large Placental Chorioangioma

    Directory of Open Access Journals (Sweden)

    Maria Angelica Zoppi

    2014-01-01

    Full Text Available We employed color Doppler score as an innovative approach for the prenatal diagnosis and monitoring of a large placental chorioangioma case diagnosed at 26 weeks and the subjective semiquantitative assessment of the vascularization. The blood flow was assessed by a color Doppler score based on the intensity of the color signal with the following value ranges: (1 no flow, (2 minimal flow, (3 moderate flow, and (4 high vascular flow. Weekly examinations were programmed. Initially, a color Doppler score 3 was assigned, remaining unchanged at the following two exams and decreasing to Score 2 in the following 2 exams and to Score 1 thereafter. The ultrasonographic scan showed an increase of the mass size at the second and third exams and was followed by an arrest of the growth persisting for the rest of the pregnancy. Some hyperechogenic spots inside the mass appeared at the end. Expectant management was opted for, and the delivery was at 39, 2 weeks and maternal and fetal outcomes were favourable. The color Doppler score employed for assessment of vascularization in successive examinations proved to be an important tool for the prediction of the chorioangioma involution, and this new approach of monitoring allowed effective surveillance and successful tailored management.

  17. Low Complexity Direction and Doppler Frequency Estimation for Bistatic MIMO Radar in Spatial Colored Noise

    Directory of Open Access Journals (Sweden)

    Lingyun Xu

    2014-01-01

    Full Text Available We investigate the algorithm of direction and Doppler frequency estimation for bistatic multiple-input multiple-output (MIMO radar in spatial colored noise. A novel method of joint estimation of direction and Doppler frequency in spatial colored noise based on propagator method (PM for bistatic MIMO radar is discussed. Utilizing the cross-correlation matrix which is formed by the adjacent outputs of match filter in the time domain, the special matrix is constructed to eliminate the influence of spatial colored noise. The proposed algorithm provides lower computational complexity and has very close parameters estimation compared to estimation of signal parameters via rotational invariance technique (ESPRIT algorithm in high signal-to-noise ratio (SNR. It is applicable even if the transmitted waveforms are not orthogonal. The estimated parameters can be paired automatically and the Cramér-Rao Bound (CRB is given in spatial colored noise. Simulation results confirm the effectiveness of the proposed method.

  18. Color Doppler Sonography Accompanied by Dynamic Scanning for the Diagnosis of Ankle and Foot Fractures.

    Science.gov (United States)

    Oh, Myung-Jin; Park, Ki-Tae; Youn, Kwang-Mi; Joo, Jong-Cheon; Park, Soo-Jung

    2017-11-21

    Sonography is conventionally used to diagnose fractures by identifying cortical discontinuity of the bone. In this study, fracture sonography in addition to color Doppler and dynamic scanning was performed in settings with limited or no access to radiography. We describe 5 cases of ankle and foot fractures with the use of sonography to identify changes in the fractured site. The width of the fracture space increased on dynamic scanning, and the Doppler signals were generated inside the fracture space on dynamic scanning. In conclusion, color Doppler sonography accompanied by dynamic scanning is a useful adjunctive diagnostic tool in addition to previously described sonographic fracture findings. © 2017 by the American Institute of Ultrasound in Medicine.

  19. [Identification of cervical lymph node micrometastasis of tongue cancer by color Doppler and MRI].

    Science.gov (United States)

    Fan, Sufeng; Zhang, Quan; Li, Qiuli; Wang, Lina; Zheng, Lie; Liu, Longzhong

    2014-01-01

    To assess the values of color Doppler and magnetic resonance imaging (MRI) in the identification of cervical lymph node micrometastasis of tongue cancer. Totally 96 cases of tongue cancer with impalpable neck lymph node was examined with color Doppler and MRI within one week before surgery. Chi-square test was used to assess if the presence of regional lymph node micrometastasis, histopathological analysis as a golden standard lymph node micrometastasis. For the diagnosis of cervical lymph node micrometastasis, color Doppler was significantly better than MRI in sensitivity (72.5% vs 50.0%, P = 0.039) and the accuracy (78.1% vs 64.6%, P = 0.038), but no significant difference in the specificity (82.1% vs 75.0%, P = 0.357), the positive predictive value (74.4% vs 58.8%, P = 0.159) and the negative predictive value (80.7% vs 67.7%, P = 0.108). Color Doppler is better than MRI in the sensitivity and accuracy for the diagnosis of cervical lymph node micrometastasis of tongue cancer.

  20. CT angiography and Color Doppler ultrasonography features and sensitivity in detection of carotid arteries diseases

    Directory of Open Access Journals (Sweden)

    Samir Kamenjaković

    2013-04-01

    Full Text Available Introduction: The aim of this research was to compare specifi city and sensitivity of Color Doppler ultrasonographywith CT angiography.Methods: A total of one hundred patients suffering from carotid artery disease (n=200 were tested in this research in the period from June till October, 2011. Average age of the patients was 61.5 years, and most of the patients were in the age group ranging from 55 to 65 years. The level of carotid artery stenosis is measured according to Standards of the North America Symptomatic Carotid Endarterectomy Trail study,by method of Color Doppler ultrasonography and CT angiography.Results: Stenosis of registering the stenosis to be higher by Color Doppler ultrasonography, than by CT angiography. In the case of the occlusion, there was also the similar observation, with variation of 8% carotid arteries.Conclusion: Extracranial Doppler and color duplex ultrasound enable reliable detection of both stenosis and occlusion of carotid arteries and accordingly they occupy an important place in radiological algorithm. When it comes to CT angiography it can be concluded that it can provide accurate and exact information regarding the condition of blood vessels as good as Digital Subtractive Angiography can.

  1. Significance of CT scan and color Doppler duplex ultrasound in the assessment of Abernethy malformation.

    Science.gov (United States)

    Nacif, Lucas Souto; Paranaguá-Vezozzo, Denise Cerqueira; Galvão, Flávio Henrique Ferreira; Rocha, Manoel S; Andraus, Wellington; Carrilho, Flair Jose; D'Albuquerque, Luiz Carneiro

    2015-09-18

    Abernethy malformation is a rare congenital vascular abnormality in which the portal vein bypasses the liver and drains directly into the inferior vena cava. Diagnosis is complex and requires good quality imaging methods to identify details in systemic and portal circulation in order to establish diagnostic confirmation and treatment strategy. In this study we highlight the significance of the use of CT scans and Color Doppler Duplex Ultrasound for the diagnosis, treatment and evolution assessment in two adults with Abernethy malformation. The diagnosis and the treatment of two patients with Abernethy malformation by CT scan and Color Doppler Duplex Ultrasound is described. One patient was submitted to liver transplantation due to chronic liver disease and multiple nodules diagnosed as adenoma. The other patient had normal liver function and a mild neurological and psychomotor dysfunction, therefore we adopted clinical treatment and close liver parenchyma evaluation and nodule surveillance, using an imaging approach involving intercalating CT scan and Color Doppler Duplex Ultrasound every 6 months. We highlight some important direct and indirect findings of non-invasive imaging methods. Abernethy malformation requires meticulous image diagnosis to improve treatment and avoid iatrogenic procedures. CT scans and Color Doppler Duplex Ultrasound are both efficient methods for diagnosis, treatment planning and evolution assessment of patients with Abernethy malformation.

  2. Prognostic value of clinical and Doppler echocardiographic findings in children and adolescents with significant rheumatic valvular disease

    Directory of Open Access Journals (Sweden)

    Fátima Derlene da Rocha Araújo

    2012-01-01

    Conclusions: Our study suggests that the use of Doppler echocardiography during RF helps to identify prognostic factors regarding the development of significant valvular heart disease. Initial severe carditis is an important factor in the long-term prognosis of chronic RHD, whereas arthritis and chore during the initial episode of RF appears to be protective. Strict secondary prophylaxis should be mandatory in high risk patients.

  3. Prognostic value of clinical and Doppler echocardiographic findings in children and adolescents with significant rheumatic valvular disease

    OpenAIRE

    Fátima Derlene da Rocha Araújo; Eugênio Marcos Andrade Goulart; Zilda Maria Alves Meira

    2012-01-01

    Introduction: The diagnosis of acute rheumatic fever (RF) is based on clinical findings. However, during the chronic phase of the disease, the clinical approach is not sufficient for the follow-up of the patients and the Doppler echocardiography is a tool for the diagnosis of cardiac involvement. Prognostic variables that influence long-term outcomes are not well known. Methods: 462 patients with RF according to Jones criteria were studied, and followed-up from the initial attack to 13.6 ...

  4. Prognostic value of clinical and Doppler echocardiographic findings in children and adolescents with significant rheumatic valvular disease.

    Science.gov (United States)

    Araújo, Fátima Derlene da Rocha; Goulart, Eugênio Marcos Andrade; Meira, Zilda Maria Alves

    2012-07-01

    The diagnosis of acute rheumatic fever (RF) is based on clinical findings. However, during the chronic phase of the disease, the clinical approach is not sufficient for the follow-up of the patients and the Doppler echocardiography is a tool for the diagnosis of cardiac involvement. Prognostic variables that influence long-term outcomes are not well known. 462 patients with RF according to Jones criteria were studied, and followed-up from the initial attack to 13.6 ± 4.6 years. All patients underwent clinical assessment and Doppler echocardiography for the detection of heart valve involvement in the acute and chronic phases. Multivariate logistic regression analysis was used to identify the factors influencing long-term heart valve disease. Carditis occurred in 55.8% and subclinical valvulitis in 35.3% patients. In the chronic phase, 33% of the patients had significant valvular heart disease. No normal Doppler echocardiography exam was observed on patients who had severe valvulitis, although heart auscultation had become normal in 13% of these. In the multivariate analysis, only the severity of carditis and the mitral and/or aortic valvulitis were associated with significant valvular heart disease. Chorea or arthritis were protective factors for significant valvular heart disease, odds ratio 0.41 (95% C.I. 0.22 - 0.77) and 0.43 (95% C.I. 0.23 - 0.82), respectively. Our study suggests that the use of Doppler echocardiography during RF helps to identify prognostic factors regarding the development of significant valvular heart disease. Initial severe carditis is an important factor in the long-term prognosis of chronic RHD, whereas arthritis and chore during the initial episode of RF appears to be protective. Strict secondary prophylaxis should be mandatory in high risk patients.

  5. Addition of Color Doppler Sonography for Detection of Amniotic Fluid Disturbances and Its Implications on Perinatal Outcomes.

    Science.gov (United States)

    Odibo, Imelda N; Whittemore, Brianna S; Hughes, Dawn S; Simmons, Pamela M; Ounpraseuth, Songthip T; Magann, Everett F

    2017-09-01

    To determine whether color Doppler sonography increases the detection of pregnancies at risk for adverse outcomes. Participants admitted to labor and delivery with the anticipation of a vaginal delivery underwent measurements of amniotic fluid volume (AFV) using amniotic fluid index (AFI) and single deepest pocket (SDP) techniques by grayscale followed by color Doppler sonography. Oligohydramnios was defined as an AFI of less than 5 cm or an SDP of less than 2 cm. Intrapartum and perinatal outcomes were compared between participants with a diagnosis of a low AFV by grayscale and color Doppler sonography. Over 42 months, 428 women were enrolled in the study. Color Doppler sonography resulted in lower AFV estimates (mean ± SD by the AFI, 10.7 ± 3.7 cm by grayscale sonography and 8.6 ± 3.6cm by color Doppler sonography; P Doppler sonography (P Doppler sonography in estimating the AFV was fair, with κ = 0.32 for the AFI and 0.28 for the SDP. Outcome measures of AFVs classified as low based on color Doppler sonography (normal by grayscale sonography) and those classified as low by grayscale sonography (low by color Doppler sonography) were compared. There was no difference in composite perinatal complications, mode of delivery, or composite neonatal complications. The use of color Doppler sonography leads to the overdiagnosis of low AFVs and does not appear to increase the detection of pregnancies destined for adverse intrapartum or perinatal outcomes. © 2017 by the American Institute of Ultrasound in Medicine.

  6. High-intensity focused ultrasound ablation assisted using color Doppler imaging for the treatment of hepatocellular carcinomas.

    Science.gov (United States)

    Fukuda, Hiroyuki; Numata, Kazushi; Nozaki, Akito; Kondo, Masaaki; Morimoto, Manabu; Maeda, Shin; Tanaka, Katsuaki; Ohto, Masao; Ito, Ryu; Ishibashi, Yoshiharu; Oshima, Noriyoshi; Ito, Ayao; Zhu, Hui; Wang, Zhi-Biao

    2013-12-01

    We evaluated the usefulness of color Doppler flow imaging to compensate for the inadequate resolution of the ultrasound (US) monitoring during high-intensity focused ultrasound (HIFU) for the treatment of hepatocellular carcinoma (HCC). US-guided HIFU ablation assisted using color Doppler flow imaging was performed in 11 patients with small HCC (<3 lesions, <3 cm in diameter). The HIFU system (Chongqing Haifu Tech) was used under US guidance. Color Doppler sonographic studies were performed using an HIFU 6150S US imaging unit system and a 2.7-MHz electronic convex probe. The color Doppler images were used because of the influence of multi-reflections and the emergence of hyperecho. In 1 of the 11 patients, multi-reflections were responsible for the poor visualization of the tumor. In 10 cases, the tumor was poorly visualized because of the emergence of a hyperecho. In these cases, the ability to identify the original tumor location on the monitor by referencing the color Doppler images of the portal vein and the hepatic vein was very useful. HIFU treatments were successfully performed in all 11 patients with the assistance of color Doppler imaging. Color Doppler imaging is useful for the treatment of HCC using HIFU, compensating for the occasionally poor visualization provided by B-mode conventional US imaging.

  7. Quantitative Doppler-echocardiographic imaging and clinical outcomes with left ventricular systolic dysfunction: independent effect of pulmonary hypertension.

    Science.gov (United States)

    Miller, Wayne L; Mahoney, Douglas W; Enriquez-Sarano, Maurice

    2014-03-01

    Doppler-echocardiography provides quantitative imaging of systolic and diastolic left ventricular (LV) function, functional mitral regurgitation (FMR), and pulmonary hypertension (PH) in patients with LV systolic dysfunction. Whether PH is linked to survival independently of LV features and FMR in symptomatic and asymptomatic patients is unknown. Patients with LV ejection fraction ≤40% and quantitative Doppler-echocardiography assessment of FMR and PH were studied. Patients were frequency matched for those with Doppler-echocardiography estimated pulmonary systolic pressure ≥45 mm Hg (n=692) and those without PH (n=692; pulmonary systolic pressure, <45 mm Hg) for age, sex, LV ejection fraction, and quantified FMR severity and analyzed for long-term survival after diagnosis. During follow-up (median, 8.9 years), 885 deaths (63.5%) occurred, with PH being associated with higher 5-year mortality: 51±2% versus 37±2%, P<0.001. In multivariate analysis, PH demonstrated increased mortality risk independent of age, sex, severity of diastolic and systolic LV dysfunction, FMR, comorbidities, and symptom (hazard ratio, 1.34; 95% confidence limit, 1.17-1.53; P<0.001). Subgroup analysis, stratified by symptoms, degree of FMR, and severity of LV dysfunction, demonstrated that PH was associated with excess mortality in all subgroups. In this large cohort of patients with LV systolic dysfunction, in whom FMR and LV characteristics were quantified and matched between those with and without PH, the presence of PH was an independent factor for excess mortality and not a surrogate for the severity of LV systolic dysfunction or FMR. In asymptomatic or symptomatic patients with or without FMR, PH is a critical marker for poor outcomes.

  8. TORSION TESTIS : ROLE OF COLOR DOPPLER : A STUDY OF 50 CASES

    Directory of Open Access Journals (Sweden)

    Anand

    2015-09-01

    Full Text Available BACKGROUND: T orsion testis is one of the catast r ophic conditions in children and young a d u lts. Traditionally the diagnosis was made clinical presentation and suspicion. Critical decision making is essential to save the testis . OBJECTIVE: To study the usefu lness and efficacy of Doppler ultrasound in correctly diagnosing acute scrotal conditions in children and young adults to save the testis and to avoid negative explorations. METHODS: Over a period of two years 50 patients with acute scrotum were admitted i n general surgery department who underwent Doppler ultrasound scrotum and its efficacy in correctly diagnosing the pathology was analysed. RESULTS: 50 patients with age group <25 years were included in study. Scrotal pain was the most frequent presenting s ymptom of acute scrotum (98% followed by Swelling of the hemiscrolum on the involved side present in 86% of the patients. Doppler ultrasound showed torsion of testis in 18 patients. On Scrotal exploration, torsion of spermatic cord was confirmed in 16 pat ients, one patient had torsion of appendix of testis and the other had Epididymo - orchitis. Thus the sensitivity and specificity of Doppler ultrasonography for testicular torsion was 86.9% and 92.6% respectively. 2 patients with equivocal Doppler findings, but strong clinical suspicion of testicular torsion were explored, and testis was found to be torsed in both two patients. Doppler ultrasonography showed Epididymo - orchitis in 22 patients, torsion of testicular appendage in 2 patients, Idiopathic scrotal edema in one, and in 5 pts no significant pathology found. All twenty patients of epididymo - orchitis, two patients of torsion of testicular appendage, and one patient of idiopathic scrotal edema were managed conservatively. At three weeks follow up, all th e patients were free of symptoms. The sensitivity and specificity of Doppler ultrasonography for epididymo - orchitis was 95% and 100% respectively. CONCLUSIONS: color

  9. Assessment of myocardial velocities and global function of the left ventricle in asymptomatic patients with moderate-to-severe chronic aortic regurgitation: a tissue Doppler echocardiographic study.

    Science.gov (United States)

    Sokmen, Gulizar; Sokmen, Abdullah; Duzenli, Akif; Soylu, Ahmet; Ozdemir, Kurtulus

    2007-07-01

    Asymptomatic patients with chronic aortic regurgitation (AR) have an excellent prognosis in the presence of preserved systolic function. It is a challenge to recognize patients with subclinical myocardial dysfunction in AR. Conventional parameters still have many drawbacks in predicting early left ventricular (LV) dysfunction. Pulsed-wave tissue Doppler imaging (PW-TDI) is a useful noninvasive technique for evaluating global and regional LV systolic function. In this study, we aimed to assess clinical usefulness of TDI in predicting early disturbance of myocardial contractility in asymptomatic patients with significant AR and preserved left ventricular systolic function. Echocardiograms were obtained in 32 AR patients and 33 healthy subjects. In addition to conventional parameters, regional myocardial velocities, isovolumetric contraction time (mICT), isovolumetric relaxation time (mIRT), and ejection time (mET) of left ventricle were obtained by TDI and modified LV myocardial performance index (MPI) was calculated. In AR, peak systolic velocity (Sm) of septal and anterior mitral annulus, and mean Sm was significantly lower, and LVMPI was significantly higher compared to control group. The data obtained by TDI show that LV MPI is lengthened, and systolic myocardial velocities are shortened in patients having chronic AR with normal LV systolic function according to conventional echocardiographic parameters. This suggests that LV long-axis contraction and global LV performance are preciously and noticeably decreased in patients with moderate-to-severe chronic AR despite normal LV ejection fraction.

  10. Pulsed and Color Doppler Sonographic Findings of Penile Mondor' Disease

    Energy Technology Data Exchange (ETDEWEB)

    Han, Hye Yeon; Chung, Dong Jin; Kim, Kum Won; Hwang, Cheol Mog [University of Konyang School of Medicine, Daejeon (Korea, Republic of)

    2008-04-15

    Penile Mondor's disease is a rare disease that's characterized by thrombosis in the dorsal vein of the penis. Doppler ultrasonography (US) clearly visualizes dorsal vein thrombosis and the associated hemodynamic alterations. Previous studies have demonstrated the typical color Doppler US findings of superficial dorsal vein thrombosis without the flow signals in this area, yet this is insufficient to understand the hemodynamics in penile Mondor's disease. We report here for the first time a cavernosal artery flow signal pattern in a penile Mondor's disease patient, in addition to its previously reported classic US findings. In conclusion, the Doppler US findings of thrombus without blood flow in the superficial dorsal vein and the low-flow, high resistance in the cavernosal artery may be suggestive of penile Mondor's disease.

  11. Ophthalmic artery color Doppler ultrasonography in mild-to-moderate preeclampsia

    Energy Technology Data Exchange (ETDEWEB)

    Ayaz, Tunahan; Akansel, Gur. E-mail: gakansel@superonline.com; Hayirlioglu, Alper; Arslan, Arzu; Suer, Necdet; Kuru, Ihsan

    2003-06-01

    Objective: To evaluate the hemodynamic changes in mild-moderate preeclampsia using ophthalmic artery Doppler ultrasonography technique. Methods: Ophthalmic artery pulsatility and resistivity indices were calculated in 30 mild-moderate preeclamptic women and 30 normotensive gravid women of matched gestational age. Student's t-test was performed to test the significance of difference. Results: Both indices of peripheral resistance were found to be significantly lower in the ophthalmic arteries of mild-moderately preeclamptic women than those measured in normotensive gravid women at similar stage of pregnancy. In a small number patients whose disease progressed to severe preeclampsia, both indices increased. Conclusion: In patients with mild-moderate preeclampsia, ophthalmic artery color Doppler ultrasonography detects hemodynamic changes that are not present in normotensive gravid women. Reversal of Doppler patterns in a small number of patients with progressive disease supports the hypotheses suggesting the presence of early vasodilation and late vasospasm in the etiology of preeclampsia.

  12. Portal biliopathy diagnosed using color Doppler and contrast-enhanced ultrasound.

    Science.gov (United States)

    Nunoi, Hiroaki; Hirooka, Masashi; Ochi, Hironori; Koizumi, Yohei; Tokumoto, Yoshio; Abe, Masanori; Tada, Fujimasa; Ikeda, Yoshio; Matsuura, Bunzo; Tanaka, Hiroaki; Tsuda, Takaharu; Mochizuki, Teruhito; Hiasa, Yoichi; Onji, Morikazu

    2013-01-01

    Portal biliopathy is a morphological abnormality of the biliary ductal and gallbladder wall associated with portal hypertension. A patient with essential thrombocythemia was initially diagnosed with extrahepatic portal vein obstruction (EHPVO). The contrast-enhanced computed tomography (CT) findings were similar to those of cholangiocarcinoma or sclerosing cholangitis. However, color Doppler and contrast-enhanced ultrasound (US) were more specific. The paracholedocheal veins around the bile ducts appeared as beads soon after the injection of contrast medium, followed by linear enhancement of the epicholedochal veins and the gradual enhancement of the whole bile ducts. These findings led to a diagnosis of portal biliopathy, which prevented the patient from having to endure hazardous procedures such as bile duct biopsies. Color Doppler and contrast-enhanced US findings are useful for diagnosing or ruling out portal biliopathy in patients who present with EHPVO.

  13. Practical application of color Doppler ultrasonography in patients with ejaculatory dysfunction.

    Science.gov (United States)

    Hara, Ryoei; Nagai, Atsushi; Fujii, Tomohiro; Fukumoto, Kazuhiko; Ohira, Shin; Jo, Yoshimasa; Yokoyama, Teruhiko; Miyaji, Yoshiyuki

    2015-06-01

    We describe two cases in which dynamic analysis of ejaculation using color Doppler ultrasonography was useful in diagnosis of ejaculatory dysfunction and planning of therapy. The first patient was a 32-year-old man with a diagnosis of retrograde ejaculation. A bladder neck collagen injection was carried out, as the main cause was thought to be the bladder neck remaining open during ejaculation. The patient had antegrade ejaculation 1 week later. The second patient was a 48-year-old man with a diagnosis of anorgasmia accompanied by decreased seminal emission and insufficient function of the rhythmic pelvic striated muscles. The patient was prescribed etilefrine hydrochloride 15 mg/day. The symptom improved 2 weeks after starting this drug. These cases suggest that the use of color Doppler ultrasonography during ejaculation can improve the understanding of ejaculatory dysfunction and therapy for this condition. © 2015 The Japanese Urological Association.

  14. The Efficacy of Magnetic Resonance Imaging and Color Doppler Ultrasonography in Diagnosis of Salivary Gland Tumors

    Directory of Open Access Journals (Sweden)

    Behrooz Davachi

    2014-12-01

    Full Text Available Background and aims. Although salivary gland tumors are not very common, early diagnosis and treatment is crucial because of their proximity to vital organs, and therefore, determining the efficacy of new imaging procedures becomes important. This study aimed to evaluate the efficacy of magnetic resonance imaging (MRI and color doppler ultrasonography parameters in the diagnosis and differentiation of benign and malignant salivary gland tumors. Materials and methods. In this cross-sectional study, color doppler ultrasonography and MRI were performed for 22 patients with salivary gland tumor. Demographic data as well as MRI, color doppler ultrasonography, and surgical parameters including tumor site, signal in MRI images, ultrasound echo, tumor border, lymphadenopathy, invasion, perfusion, vascular resistance index (RI, vascular pulse index (PI were analyzed using Chi-square test, Fisher’s exact test, and independent ttest. Results. The mean age of patients was 46.59±13.97 years (8 males and 14 females. Patients with malignant tumors were older (P < 0.01. The most common tumors were pleomorphic adenoma (36.4%, metastasis (36.4%, and mucoepidermoid carcinoma (9%. Nine tumors (40.9% were benign and 13 (59.1% were malignant. The overall accuracy of MRI and color doppler ultrasonography in determining tumor site was 100% and 95%, respectively. No significant difference observed between RI and PI and the diagnosis of tumor. Conclusion. Both MRI and ultrasonography have high accuracy in the localization of tumors. Well-identified border was a sign of benign tumors. Also, invasion to adjacent structures was a predictive factor for malignancy.

  15. Characterization of atherosclerotic plaque of carotid arteries with histopathological correlation: Vascular wall MR imaging vs. color Doppler ultrasonography (US)

    National Research Council Canada - National Science Library

    Watanabe, Yuji; Nagayama, Masako; Suga, Tsuyoshi; Yoshida, Kazumichi; Yamagata, Sen; Okumura, Akira; Amoh, Yoshiki; Nakashita, Satoru; Van Cauteren, Marc; Dodo, Yoshihiro

    2008-01-01

    To investigate whether the vessel wall MRI of carotid arteries would differentiate at-risk soft plaque from solid fibrous plaque by identifying liquid components more accurately than color Doppler ultrasonography (US...

  16. Diagnostic agreement between panoramic radiographs and color doppler images of carotid atheroma

    Directory of Open Access Journals (Sweden)

    Claudia Maria Romano-Sousa

    2009-02-01

    Full Text Available The aim of this study was to investigate the agreement between diagnoses of calcified atheroma seen on panoramic radiographs and color Doppler images. Our interest stems from the fact that panoramic images can show the presence of atheroma regardless of the level of obstruction detected by color Doppler images. Panoramic and color Doppler images of 16 patients obtained from the archives of the Health Department of the city of Valença, RJ, Brazil, were analyzed in this study. Both sides of each patient were observed on the images, with a total of 32 analyzed cervical regions. The level of agreement between diagnoses was analyzed using the Kappa statistics. There was a high level of agreement, with a Kappa value of 0.78. In conclusion, panoramic radiographs can help detecting calcifications in the cervical region of patients susceptible to vascular diseases predisposing to myocardial infarction and cerebrovascular accidents. If properly trained and informed, dentists can refer their patients to a physician for a cardiovascular evaluation in order to receive proper and timely medical treatment.

  17. Estudo comparativo das avaliações clínica e ecocardiográfica Doppler na evolução das lesões valvares em crianças e adolescentes portadores de febre reumática Comparative study of clinical and Doppler echocardiographic evaluations of the progression of valve diseases in children and adolescents with rheumatic fever

    Directory of Open Access Journals (Sweden)

    Zilda Maria Alves Meira

    2006-01-01

    Full Text Available OBJETIVO: Comparar os exames clínico e ecocardiográfico Doppler na avaliação das lesões valvares em crianças e adolescentes com febre reumática, bem como investigar a evolução da doença segundo essas avaliações. MÉTODOS: Trata-se de estudo observacional longitudinal que englobou 258 crianças e adolescentes com diagnóstico de febre reumática, baseado nos critérios de Jones. Os pacientes foram acompanhados durante o período de 2 a 15 anos. A presença e a quantificação das lesões valvares nas fases aguda e crônica foram determinadas pelas avaliações clínica e ecocardiográfica Doppler. Utilizou-se a estatística de Kappa para estimar a concordância entre as avaliações, e as evoluções clínica e ecocardiográfica Doppler da cardite e valvite, respectivamente, foram comparadas pelo teste do qui-quadrado ou de Fisher, p OBJECTIVE: Compare clinical and Doppler echocardiographic evaluations in assessing valvular diseases in children and adolescents with rheumatic fever, as well as assess the progression of the disease in light of these assessments. METHODS: This is a longitudinal study of 258 children and adolescents diagnosed with rheumatic fever according to Jones’ criteria. The follow-up period ranged from 2-15 years. The presence and quantification of valve diseases were determined by means of clinical and Doppler echocardiographic evaluations performed during the acute and chronic phases. The Kappa statististics method was used to estimate the degree of agreement between clinical and Doppler echocardiographic evaluations. Comparisons between clinical and Doppler echocardiographic findings on the progress of carditis and valvulitis, respectively, were made using chi-square test or Fisher’s exact test, p< 0.05. RESULTS: Of the 109 patients who underwent Doppler echocardiographic evaluation during the acute phase, 31 did not present clinical evidence of carditis, but the Doppler echocardiograms of 17 (54.8% of them

  18. B-mode Ultrasound Versus Color Doppler Twinkling Artifact in Detecting Kidney Stones

    Science.gov (United States)

    Harper, Jonathan D.; Hsi, Ryan S.; Shah, Anup R.; Dighe, Manjiri K.; Carter, Stephen J.; Moshiri, Mariam; Paun, Marla; Lu, Wei; Bailey, Michael R.

    2013-01-01

    Abstract Purpose To compare color Doppler twinkling artifact and B-mode ultrasonography in detecting kidney stones. Patients and Methods Nine patients with recent CT scans prospectively underwent B-mode and twinkling artifact color Doppler ultrasonography on a commercial ultrasound machine. Video segments of the upper pole, interpolar area, and lower pole were created, randomized, and independently reviewed by three radiologists. Receiver operator characteristics were determined. Results There were 32 stones in 18 kidneys with a mean stone size of 8.9±7.5 mm. B-mode ultrasonography had 71% sensitivity, 48% specificity, 52% positive predictive value, and 68% negative predictive value, while twinkling artifact Doppler ultrasonography had 56% sensitivity, 74% specificity, 62% positive predictive value, and 68% negative predictive value. Conclusions When used alone, B-mode is more sensitive, but twinkling artifact is more specific in detecting kidney stones. This information may help users employ twinkling and B-mode to identify stones and developers to improve signal processing to harness the fundamental acoustic differences to ultimately improve stone detection. PMID:23067207

  19. Comparison of Ultrasound Elastography and Color Doppler Ultrasonography for Distinguishing Small Triple-Negative Breast Cancer From Fibroadenoma.

    Science.gov (United States)

    Yeo, Soo Hyun; Kim, Ga Ram; Lee, Su Hyun; Moon, Woo Kyung

    2018-02-09

    To compare the performance of ultrasound elastography and color Doppler ultrasonography (US) in distinguishing small, oval, or round triple-negative breast cancer from fibroadenoma and the influence on the further management decision at US. In total, 131 biopsy-proven oval or round fibroadenomas (n = 68) and triple-negative breast cancers (n = 63) smaller than 2 cm were included. Three blinded readers assessed the images from US, elastography, and color Doppler imaging according to the Breast Imaging Reporting and Data System lexicon independently. Interobserver agreement was assessed, and sensitivity, specificity, accuracy, and area under the receiver operating characteristic curve values for each data set were compared. Pathologic results were reference standards. The interobserver agreements were excellent (intraclass correlation coefficients, 0.856 for US, 0.948 for elastography, and 0.864 for color Doppler). The specificity and accuracy of US with elastography were increased compared with US alone or US with Doppler imaging without statistically significant differences in sensitivity. The average area under the curve for US with elastography (0.869) was increased compared with US alone (0.650) or US with color Doppler (0.576). Elastography is more useful than color Doppler imaging for distinguishing small, oval, or round triple-negative breast cancer from fibroadenoma, and elastography can help avoid biopsy of benign masses. © 2018 by the American Institute of Ultrasound in Medicine.

  20. Preload dependence of color M-mode Doppler flow propagation velocity in controls and in patients with left ventricular dysfunction

    DEFF Research Database (Denmark)

    Møller, J E; Poulsen, S H; Søndergaard, E

    2000-01-01

    The purpose of this study was to assess the effects of preload alterations on color M-mode flow propagation velocity (Vp) in volunteers with normal left ventricular (LV) function and in patients with depressed LV function. Color M-mode Doppler echocardiography was performed during Valsalva maneuver...

  1. Left ventricular noncompaction: Clinical-echocardiographic study

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    Nikolić Aleksandra

    2012-01-01

    Full Text Available Background/Aim. Left ventricular noncompaction (LVNC is a disorder in endomyocardial morphogenesis, seen either isolated (in the absence of other cardiac anomalies or in association with congenital heart disease and some neuromuscular diseases. Intrauterine arrest of the compaction of myocardial fibers is postulated to be the reason of LVNC. Recognition of this condition is extremely important due to its high mortality and morbidity that lead to progressive heart failure, ventricular arrhythmias and thromboembolic events. The aim of this study was to determine the prevalence and clinical presentation of LVNC among consecutive outpatients according to clinical and echocardiographyic findings. Methode. A total of 3,854 consecutive patients examined at the Institute for Cardiovascular Diseases within a period January 2006 - January 2007 were included in the study. All the patients underwent echocardiographic examination using the same equipment (Vivid 7, GE Medical System. Echocardiographic parameters and clinical presentation in patients with echocardiographic criteria for LVNC were analyzed. Results. Analyzing 3,854 consecutive outpatients, using two-dimensional Color Doppler echocardiography from January 2006 to January 2007, 12 patients met the criteria for LVNC. Seven of them were male. The mean age at diagnosis was 45 ± 15 years. Analyzing clinical manifestation of LVNC it was found that seven patients had signs of heart failure, six had arrhythmias with no embolic events. Conclusion. Our results suggest that the real prevalence of LVNC may be higher than expected. New studies have to be done to solve this problem.

  2. Gender-related asymmetric brain vasomotor response to color stimulation: a functional transcranial Doppler spectroscopy study.

    Science.gov (United States)

    Njemanze, Philip C

    2010-11-30

    The present study was designed to examine the effects of color stimulation on cerebral blood mean flow velocity (MFV) in men and women. The study included 16 (8 men and 8 women) right-handed healthy subjects. The MFV was recorded simultaneously in both right and left middle cerebral arteries in Dark and white Light conditions, and during color (Blue, Yellow and Red) stimulations, and was analyzed using functional transcranial Doppler spectroscopy (fTCDS) technique. Color processing occurred within cortico-subcortical circuits. In men, wavelength-differencing of Yellow/Blue pairs occurred within the right hemisphere by processes of cortical long-term depression (CLTD) and subcortical long-term potentiation (SLTP). Conversely, in women, frequency-differencing of Blue/Yellow pairs occurred within the left hemisphere by processes of cortical long-term potentiation (CLTP) and subcortical long-term depression (SLTD). In both genders, there was luminance effect in the left hemisphere, while in men it was along an axis opposite (orthogonal) to that of chromatic effect, in women, it was parallel. Gender-related differences in color processing demonstrated a right hemisphere cognitive style for wavelength-differencing in men, and a left hemisphere cognitive style for frequency-differencing in women. There are potential applications of fTCDS technique, for stroke rehabilitation and monitoring of drug effects.

  3. [Intracranial blood flow velocities evaluated by color Doppler (duplex) in preterm infants].

    Science.gov (United States)

    de Assis, Marcelo Cardoso; Machado, Helio Rubens

    2004-03-01

    In order to ascertain the blood flow velocities in the intracranial arteries we evaluated 73 preterm neonates during a period ranging from June 1994 to March 1999. These preterm infants were divided in two separate groups, 18 healthy and 55 with intracranial hemorrhage. They were subjected to sequential measurements of blood flow velocities in the intracranial arteries. The gestational age of the whole group varied from 28 to 36 weeks and birth weights between 720 and 2530 g. The diagnosis of the intracerebral hemorrhages in these preterm neonates were done using high resolution gray and color scale transfontanellar ultrasonography brain scans. The ultrasound evaluations were performed in the initial 3rd, 7th and 14th day of life. The 73 preterm infants were evaluated with sequential measurements of blood flow velocity in the intracranial arteries using the Doppler technique through the anterior fontanelle. Doppler evaluation of the cerebral vessels were performed on days 3, 7, 30 and 90 of life. These evaluations were performed in the six intracranial arteries, meaning: right and left anterior and middle cerebral arteries and right and left internal carotid arteries. Doppler recordings were made using Duplex Color-Doppler system, pulse echo probe of 3,5; 5,0 and 7,5 MHz. Measuring the blood flow velocity in the cerebral arteries we obtained a maximum systolic velocity and end diastolic velocity with a rate in meters per second (m/s) for each cardiac cycle. After obtaining these numerical values for these velocities we obtained the resistance index (RI) or Pourcelot index. In a progressive way as the resistance index (RI) values were being obtained in each stage of this study they were also being checked in the cerebral arteries of healthy preterm infants and infants with intracranial hemorrhages. We also analyzed in a comparative method the values of the resistive index between the two groups of preterm infants observing their behaviour. The results obtained when

  4. Color Doppler imaging of the ophthalmic artery in patients with chronic heart failure.

    Science.gov (United States)

    Almeida-Freitas, Daniela B; Meira-Freitas, Daniel; Melo Jr, Luiz Alberto Soares de; Paranhos Jr, Augusto; Iared, Wagner; Ajzen, Sergio

    2011-01-01

    To evaluate the ophthalmic artery hemodynamics in patients with chronic heart failure. Doppler parameters of ophthalmic artery of 18 patients with chronic heart failure in different stages of the disease were compared with 21 healthy volunteers (control group). These parameters were also correlated with echocardiographic assessments and clinical cardiologic status. Mean diastolic velocity was 5.14 ± 2.4 cm/s in the chronic heart failure group and 7.44 ± 3.5 cm/s in the control group (p=0.007). Mean resistance index of the ophthalmic artery was 0.76 ± 0.08 in the chronic heart failure group and 0.70 ± 0.08 in the control group (p=0.04). Mean systolic velocity of the ophthalmic artery was 22.03 ± 7.7 cm/s in the chronic heart failure group and 25.32 ± 9.2 cm/s in the control group (p=0.24). There was a negative correlation between the resistance index of the ophthalmic artery and systemic blood pressure of patients with chronic heart failure (r= -0.47, p=0.007). Diastolic velocity of the ophthalmic artery correlated positively with systemic blood pressure (r=0.44, p=0.02). Lower diastolic velocity and higher resistance index were observed in the ophthalmic artery of chronic heart failure patients when compared to the control group, which probably reflects the presence of orbital vasoconstriction in response to low cardiac output. Therefore, the influence of these findings on the structure and function of the optic nerve head deserves investigation.

  5. Color Doppler imaging of the ophthalmic artery in patients with chronic heart failure

    Directory of Open Access Journals (Sweden)

    Daniela B. Almeida-Freitas

    2011-10-01

    Full Text Available Purpose: To evaluate the ophthalmic artery hemodynamics in patients with chronic heart failure. Methods: Doppler parameters of ophthalmic artery of 18 patients with chronic heart failure in different stages of the disease were compared with 21 healthy volunteers (control group. These parameters were also correlated with echocardiographic assessments and clinical cardiologic status. Results: Mean diastolic velocity was 5.14 ± 2.4 cm/s in the chronic heart failure group and 7.44 ± 3.5 cm/s in the control group (p=0.007. Mean resistance index of the ophthalmic artery was 0.76 ± 0.08 in the chronic heart failure group and 0.70 ± 0.08 in the control group (p=0.04. Mean systolic velocity of the ophthalmic artery was 22.03 ± 7.7 cm/s in the chronic heart failure group and 25.32 ± 9.2 cm/s in the control group (p=0.24. There was a negative correlation between the resistance index of the ophthalmic artery and systemic blood pressure of patients with chronic heart failure (r= -0.47, p=0.007. Diastolic velocity of the ophthalmic artery correlated positively with systemic blood pressure (r=0.44, p=0.02. Conclusion: Lower diastolic velocity and higher resistance index were observed in the ophthalmic artery of chronic heart failure patients when compared to the control group, which probably reflects the presence of orbital vasoconstriction in response to low cardiac output. Therefore, the influence of these findings on the structure and function of the optic nerve head deserves investigation.

  6. Endoscopic Color Doppler Ultrasonographic Evaluation of Gastric Varices Secondary to Left-Sided Portal Hypertension

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    Takahiro Sato

    2014-06-01

    Full Text Available Gastric varices that arise secondary to the splenic vein occlusion can result in gastrointestinal hemorrhaging. Endoscopic color Doppler ultrasonography (ECDUS was performed in 16 patients with gastric varices secondary to splenic vein occlusion. This study retrospectively evaluated the role of ECDUS in the diagnosis of gastric varices secondary to splenic vein occlusion. Thirteen patients had co-existing pancreatic diseases: 8 with chronic pancreatitis, 4 with cancer of the pancreatic body or tail and 1 with severe acute pancreatitis. Of the remaining 3 patients, 1 had myeloproliferative disease, 1 had advanced gastric cancer, and the third had splenic vein occlusion due to an obscure cause. The endoscopic findings of gastric varices were: variceal form (F classified as enlarged tortuous (F2 in 12 cases and large, coil-shaped (F3 in 4 cases, and positive for erosion or red color sign of the variceal surface in 4 cases and negative in 12 cases. ECDUS color flow images of gastric variceal flow clearly depicted a round fundal region at the center, with varices expanding to the curvatura ventriculi major of the gastric body in all 16 cases. The velocities of F3 type gastric varices were significantly higher than those of the F2 type. The wall thickness of varices positive for erosion or red color sign was significantly less than the negative cases. I conclude that ECDUS color flow images of gastric variceal flow depicted specific findings of gastric varices secondary to splenic vein occlusion at the round fundal region at the center, with varices expanding to the curvatura ventriculi major of the gastric body.

  7. Reversal of echocardiographic right-sided heart pathology in a dog with severe pulmonary hypertension: a case report

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    McMahon P

    2015-06-01

    Full Text Available Peggy McMahon,1 Carley Saelinger 2  1Emergency and Critical Care Department, 2Cardiology Department, Animal Specialty and Emergency Center, Los Angeles, CA, USA Abstract: Pathologic right-sided heart changes are a common echocardiographic finding in patients with pulmonary hypertension (PH. Canines with PH may have right heart pathology documented via echocardiographic color Doppler interrogation including tricuspid valve regurgitation, pulmonic valve insufficiency, elevated pulmonary arterial systolic pressure, elevated pulmonary arterial diastolic pressure, and alterations in ejection profiles. Two-dimensional echocardiographic findings may include right ventricular hypertrophy, interventricular septal flattening, paradoxical interventricular septal motion, pulmonary artery dilation, and potentially abnormal left heart dimensions. In veterinary medicine, much confidence is given to the measurement of pulmonary arterial systolic pressure estimated from tricuspid valve regurgitation to grade the severity of PH and monitor its improvement with little emphasis placed on the integration of two-dimensional echocardiographic right and left heart pathology in conjunction with Doppler findings. To the authors’ knowledge, marked improvement and/or resolution of echocardiographic-documented right heart pathology have not been previously reported in the veterinary literature. This case report documents profound echocardiographic improvement of right-sided heart disease in a dog with severe PH. Keywords: canine, pulmonary hypertension, tricuspid valve regurgitation, right heart hypertrophy, sildenafil  

  8. Value of color doppler sonography in the assessment of hemodialysis access dysfunction

    Directory of Open Access Journals (Sweden)

    Moghazy Khaled

    2009-01-01

    Full Text Available Arteriovenous fistula (AVF is the most widely used means of vascular access for long-term hemodialysis (HD and the complication rate related to AVF remains high. This study was conducted to determine the efficiency of Color Doppler sonography (CDS in the assessment of AVF dysfunction. Over a period of 29 months, from January 2005 to May 2007, a total of 55 patients with AVF access dysfunction were included in the study. CDS were performed in the King Fahd Hospital of the University, Al-Khobar, Saudi Arabia. CDS allowed identification of 23 patients with stenotic segments and 16 others with venous thromboses. Six patients with venous aneurysm were encountered. Doppler flow rate assessment allowed differentiation of venous hypertension in two patients and steal syndrome in two other patients. Thus, the CDS findings carried a sensitivity rate of 96.4%. Two subclavian vein stenoses, causing reduced blood flow rate, were missed by CDS and later confirmed by angiography. Thirty-four patients underwent operative intervention. Our study suggests that CDS is an ideal noninvasive technique that allows the assessment of both anatomy and hemodynamics of an AVF.

  9. [Ultrasound and color Doppler applications in nephrology. The normal kidney: anatomy, vessels and congenital anomalies].

    Science.gov (United States)

    Meola, Mario; Petrucci, Ilaria; Giovannini, Lisa; Samoni, Sara; Dellafiore, Carolina

    2012-01-01

    Gray-scale ultrasound is the diagnostic technique of choice in patients with suspected or known renal disease. Knowledge of the normal and abnormal sonographic morphology of the kidney and urinary tract is essential for a successful diagnosis. Conventional sonography must always be complemented by Doppler sampling of the principal arterial and venous vessels. B-mode scanning is performed with the patient in supine, prone or side position. The kidney can be imaged by the anterior, lateral or posterior approach using coronal, transverse and oblique scanning planes. Morphological parameters that must be evaluated are the coronal diameter, the parenchymal thickness and echogenicity, the structure and state of the urinary tract, and the presence of congenital anomalies that may mimic a pseudomass. The main renal artery and the hilar-intraparenchymal branches of the arterial and venous vessels should be accurately evaluated using color Doppler. Measurement of intraparenchymal resistance indices (IP, IR) provides an indirect and quantitative parameter of the stiffness and eutrophic or dystrophic remodeling of the intrarenal microvasculature. These parameters differ depending on age, diabetic and hypertensive disease, chronic renal glomerular disease, and interstitial, vascular and obstructive nephropathy.

  10. On the consistency of flow rate color Doppler assessment for the internal jugular vein

    Directory of Open Access Journals (Sweden)

    Francesco Sisini

    2014-01-01

    Full Text Available Color Doppler methodology to assess the vessel blood flow rate is based on the time averaged velocity of the blood measured in the longitudinal plane and the cross sectional area measurement taken either in the longitudinal plane, by assuming circular cross sectional area, or in the transversal plane. The measurement option in longitudinal plane is based on the assumption of circular cross sectional area, while the transversal one needs to evaluate both time-averaged velocity and cross sectional area in the same vessel point. A precise and validated assessment methodology is still lacking. Four healthy volunteers underwent internal jugular vein colour Doppler scanning. The cross sectional area was assessed by means of B-mode imaging in the transversal plane all along the vessel cervical course. During this assessment, cross sectional area, major and minor axis of the vessel were measured and recorded. The distance between the internal jugular vein wall and the skin surface were measured together with the intra-luminal diameter and statistically correlated with the cross sectional area data. The internal jugular vein cross sectional area measured on the transversal plane were significantly different from the cross sectional area calculated using the assumption of circular shape. The intra-luminal distance showed high correlation with the measured cross sectional area. The proper anatomical point in the cross sectional area transversal measurement can be identified by using the internal jugular vein intra-luminal distance as landmark.

  11. Color Doppler Ultrasound Study of Glomuvenous Malformations with its Clinical and Histologic Correlations.

    Science.gov (United States)

    Wortsman, X; Millard, F; Aranibar, L

    2017-07-03

    Glomuvenous malformations are hamartomatous lesions characterized by the presence of glomus cells in the vascular smooth muscle. We present the clinical and color Doppler ultrasound features of a series of 13 cases of histologically confirmed glomuvenous malformations. In all cases, the ultrasound study revealed moderately delimited superficial dermal and hypodermal pseudonodular structures of mixed echogenicity, with hypoechoic and heterogeneous areas and anechoic, pseudocystic tubular and lacunar zones. Arterial and venous vessels, mainly with a low flow (≤ 15cm/s) were observed in 85% of patients, but no arteriovenous shunts were present. Deeper structures were not affected and no phleboliths were detected. The clinical and ultrasound findings could facilitate diagnosis, surgical planning, and noninvasive follow-up in these tumors. Copyright © 2017 AEDV. Publicado por Elsevier España, S.L.U. All rights reserved.

  12. Uterine artery blood flow and microvessel density by vaginal color Doppler ultrasonography in embryo implantation failure.

    Science.gov (United States)

    Li, Zhen; Wang, Xingling; Guan, Yichun; Yu, Xiaona; Liu, Jing; Zhang, Zhan

    2017-11-01

    The purpose of this study was to investigate the clinical application of uterine artery blood flow parameters by vaginal color Doppler ultrasonography in patients with repeated embryo implantation failure and to examine the correlation between uterine artery blood flow parameters and microvessel density (MVD). We monitored the outcomes of in vitro fertilization and embryo transfer in eighty patients. We divided the patients into two groups: Pregnancy (successful pregnancy, n=50) and repeated implantation failure (more than two failures of in vitro fertilization-embryo transfer, n=30). The patients were subjected to vaginal color Doppler ultrasonography to measure endometrial thickness, peak systolic velocity/end diastolic velocity (S/D), pulsatility index (PI), resistance index (RI), and other uterine artery blood flow parameters. We found no significant differences in endometrial thickness (human chorionic gonadotropin endometrial thickness) and uterine artery blood flow parameters (S/D, PI) between the two groups. The RI value of endometrial blood flow was significantly higher in the repeated implantation failure group than that in pregnancy group. The endometrium MVD in the repeated implantation failure group was significantly lower than that of the pregnancy group. Spearman correlation analysis showed that S/D value of uterine artery blood flow in repeated implantation failure group was not correlated with MVD or uterine artery blood flow PI, but was positively correlated with RI. Endometrium MVD in patients with repeated implantation failure was significantly lower than that in patients with successful pregnancy during the implantation window. We also found a significant difference in uterine artery blood flow RI between the two groups. The uterine artery blood flow RI in patients with repeated implantation failure was positively correlated with MVD, which has clinical significance in predicting the outcome of embryo transfer.

  13. Evaluation of retrobulbar blood flow in patients with age-related cataract; color Doppler ultrasonographic findings

    Directory of Open Access Journals (Sweden)

    Mohammadi A

    2011-10-01

    Full Text Available Afshin Mohammadi1, Nilofar Khorasani2, Farzad Moloudi2, Mohammad Ghasemi-rad31Department of Radiology, Urmia University of Medical Sciences, Urmia, Iran; 2Student Research Committee, Urmia University of Medical Sciences, Urmia, Iran; 3Genius and Talented Student Organization, Student Research Committee, Urmia University of Medical Sciences, Urmia, IranObjectives: Cataracts are the most common cause of blindness worldwide, with cataract surgery being the most common ophthalmic procedure. To our best knowledge, this is the first case-control study with a large number of participants to evaluate ocular blood flow in patients with cataracts.Materials and methods: Color Doppler and duplex sonography of the orbital vessels was performed in 224 eyes of 112 patients with known bilateral age-related cataracts and in 76 eyes of 38 healthy age- and sex-matched volunteers.Results: The mean ± (standard deviation [SD] of peak systolic velocity (PSV of the ophthalmic artery in patients with cataracts (34.59 ± 22.49 cm/second was significantly different to that in controls (52.11 ± 14.01 cm/second (P < 0.001. The mean ± SD PSV of the central retinal artery in patients with cataracts (15.31 ± 4.93 cm/second was significantly different to that in controls (9.61 ± 5.64 cm/second (P < 0.001.Conclusion: The mean PSV and resistive index (RI of the ophthalmic and central retinal arteries were lower in cataract patients when compared with normal subjects. This suggests that ocular hypoperfusion and changes in ocular hemodynamic may have a role in the formation of age-related cataracts.Keywords: retrobulbar blood flow, age-related, cataract, color Doppler ultrasonographic

  14. Color Doppler US of normal cerebral venous sinuses in neonates: a comparison with MR venography

    Energy Technology Data Exchange (ETDEWEB)

    Miller, Elka [Hospital for Sick Children, Department of Diagnostic Imaging, Toronto (Canada); Children' s Hospital of Eastern Ontario (CHEO), Diagnostic Imaging Department, Ottawa (Canada); Daneman, Alan; Doria, Andrea S.; Blaser, Susan; Traubici, Jeffrey; Jarrin, Jose; Shroff, Manohar [Hospital for Sick Children, Department of Diagnostic Imaging, Toronto (Canada); Moineddin, Rahim [University of Toronto, Toronto (Canada); Moore, Aideen [Hospital for Sick Children, Department of Neonatology, Toronto (Canada)

    2012-09-15

    Color Doppler US (CDUS) has been used for evaluation of cerebral venous sinuses in neonates. However, there is very limited information available regarding the appearance of superficial and deep normal cerebral venous sinuses using CDUS and the specificity of the technique to rule out disease. To determine the specificity, inter-modality and inter-reader agreement of color Doppler US (CDUS). To evaluate normal cerebral venous sinuses in neonates in comparison to MR venography (MRV). Newborns undergoing a clinically indicated brain MRI were prospectively evaluated. All underwent a dedicated CDUS of the cerebral venous sinuses within 10 h (mean, 3.5 h, range, and 2-7.6 h) of the MRI study using a standard protocol. Fifty consecutive neonates participated in the study (30 males [60%]; 25-41 weeks old; mean, 37 weeks). The mean time interval between the date of birth and the CDUS study was 19.1 days. No cases showed evidence of thrombosis. Overall agreement for US reading was 97% (range, 82-100%), for MRV reading, 99% (range, 96-100%) and for intermodality, 100% (range, 96-100%). Excellent US-MRI agreement was noted for superior sagittal sinus, cerebral veins, straight sinus, torcular Herophili, sigmoid sinus, superior jugular veins (94-98%) and transverse sinuses (82-86%). In 10 cases (20%), MRV showed flow gaps whereas normal flow was demonstrated with US. Visualization of the inferior sagittal sinus was limited with both imaging techniques. Excellent reading agreement was noted for US, MRV and intermodality. CDUS is highly specific to rule out cerebral venous thrombosis in neonates and holds potential for clinical application as part of clinical-laboratory-imaging algorithms of pre/post-test probabilities of disease. (orig.)

  15. Therapeutic embolization of high-flow priapism 1 year follow up with color Doppler sonography

    Energy Technology Data Exchange (ETDEWEB)

    Zhao, Song, E-mail: zhaosong1984@QQ.com; Zhou, Jun, E-mail: 18740585@QQ.COM; Zhang, Yi-Fan, E-mail: XXXzyf2011@163.com; Zhang, Xiao-Long, E-mail: 87512377@QQ.COM; Long, Qing-Yun, E-mail: longqy2005@aliyun.com

    2013-12-01

    Objective: The aim of this study was to evaluate the use of color Doppler sonography (CDS) for the diagnosis of high-flow priapism and the treatment of cavernosal arterial fistula via super-selective arterial embolization. Methods and materials: We reviewed eight cases of high-flow priapism with cavernosal arterial fistula, from 2005 to 2011. All of the patients were diagnosed with a high-flow priapism and unilateral artery fistula via CDS. Conventional treatments for the eight cases were unsuccessful, and the patients were then treated through super-selective embolization. Diagnostic angiograms of the internal iliac artery showed a fistula on one side of the cavernosal artery, thus confirming the CDS images. We compared hemodynamic parameters including the peak systolic velocity, end diastolic velocity the resistance index of the pathological cavernosal artery and intracavernosal pressure in all patients before and after treatment using t-test. The efficacy of super-selective embolization and the erectile function of all patients were evaluated at a follow-up time of 12 months. Results: All patients were successfully treated and angiography showed that the fistulas disappeared after treatment. Additionally significant differences were found in the peak systolic velocity, the end diastolic velocity, the resistance index and intracavernosal pressure between pre-treatment and post-treatment (P < 0.05). At 5 days post-treatment, only one case relapses had occurred. Seven cases displayed restored erectile function and only one case exhibited erectile dysfunction. Conclusion: Color Doppler sonography is a highly sensitive method for the examination of high-flow priapism, and super-selective embolization is a safe and effective treatment for cavernosal arterial fistula.

  16. [Cor triatriatum with interventricular communication: Doppler color ultrasonography and magnetic resonance diagnosis. Repair in the first months].

    Science.gov (United States)

    Cabrera, A; Angulo, P; Martínez, P; Romero, C; Pastor, E; Galdeano, J M

    1997-04-01

    We report a case of left cor-triatrial with ventricular septal defect and patent ductus arteriosus in a lactant of six months of age. It was diagnosed using color-coded Doppler echocardiography and magnetic resonance imaging. The intracardiac defects were successfully corrected through right atriotomy.

  17. Color Doppler Echocardiographic Study on the Incidence and Natural History of Early-Infancy Muscular Ventricular Septal Defect

    Directory of Open Access Journals (Sweden)

    Jia-Kan Chang

    2011-10-01

    Conclusion: Although the incidence of M-VSD was common in the neonatal period, there was also a high rate of spontaneous closure. Therefore, comparison of M-VSD appearance with the incidence of congenital heart disease in neonates had a decisive influence on analysis.

  18. Utility of color Doppler transrectal ultrasound in the diagnosis of prostate cancer: a study of 101 cases; Utilidad de la ecografia transrectal con Doppler color en el diagnostico del cancer de prostata. Estudio de 101 casos

    Energy Technology Data Exchange (ETDEWEB)

    Morales, F. J.; Jornet, J.; Cervera, J.; Labrador, T. [Instituto Valenciano de Oncologia. Valencia (Spain)

    2001-07-01

    To determine the value of color Doppler ultrasound in the detection of prostate cancer. To relate asymmetries in vascularisation with the results of directed biopsy. Between May and November 2000, we studied 101 patients suspected of having prostate cancer. The selection criteria were a prostate-specific antigen level of over 3 ng/ml, suspicious digital rectal examination or both. The volume, capsule and internal architecture were assessed, focusing on nodules, suspicious hypoechoic areas and asymmetric color intensity. Sextant biopsies were carried out with an 18-gauge needle and samples were also taken of the areas of increased color intensity. (Author) 16 refs.

  19. Does color Doppler sonography improve the clinical assessment of patients with acute scrotum?

    Energy Technology Data Exchange (ETDEWEB)

    Pepe, Pietro [Urology Unit, Cannizzaro Hospital, Catania (Italy)]. E-mail: piepepe@hotmail.com; Panella, Paolo [Urology Unit, Cannizzaro Hospital, Catania (Italy); Pennisi, Michele [Urology Unit, Cannizzaro Hospital, Catania (Italy); Aragona, Francesco [Urology Unit, Cannizzaro Hospital, Catania (Italy)

    2006-10-15

    Introduction and objectives: Our experience concerning the use of color Doppler sonography (CDS) in the differential diagnosis of acute scrotum is reported. Material and methods: From July 2000 to July 2005, 155 patients (median 17.2 years) were admitted with a diagnosis of acute scrotum (unilateral in 150 cases, bilateral in 5). Along with a careful anamnesis and the physical exam, all patients underwent a CDS study of the scrotal content using a sonograph GE Logiq 500 with a multifrequency (7.5-10 MHz) linear probe Small Part. The following CDS parameters were evaluated: intensity of the color-power signal on the testicular parenchyma and on the epididymis; systolic peak velocity (SPV) and telediastolic velocity (TDV) in correspondence of the gonadal hilum. Ultrasound and flowmetry parameters registered on the painful testis were compared with those registered on the healthy controlateral testis. The reduction/absence versus the increase of color-power signal in the parenchyma and the reduction/absence versus the increase of SPV and TDV in the centripetal intratesticular arteries were considered presumptive of testicular torsion versus orchiepididymitis. Results: The results only refer to the 150 patients (300 testis) with acute monolateral scrotum. The clinical picture and the physical exam suggested a torsion of the spermatic cord in 40 cases, a spontaneous de-torsion in 5, an orchiepididymitis in 80, a blunt scrotal trauma in 15, a bulky epididymal cyst or a hydrocele in 4 and a testicular pain of unknown etiology in the remaining 6 cases. Standard US was pathological in 95 patients (63.3%); CDS was pathologic in 70 patients and in 42 of them suggested a testicular torsion. Fifty-three patients underwent surgical exploration: among 42 patients with a presumptive diagnosis of testicular torsion, the diagnosis was confirmed in 22 cases, no anomaly was found in 16 cases and in 4 patients a torsion of testicular appendix was found. The rupture of the tunica

  20. Análisis de perforantes de la epigástrica inferior profunda con Angio TC 3D, Eco Doppler color y Doppler simple de ultrasonidos en colgajo DIEP: resultados preliminares Analysis of deep inferior epigastric perforating vessels with 3D CT angiography, color Doppler ultrasonography and Doppler in diep flaps: preliminary results

    Directory of Open Access Journals (Sweden)

    J. Castro García

    2008-09-01

    Full Text Available Nuestro objetivo es la validación de la Angio TC tridimensional como herramienta de planificación de los colgajos DIEP, comparándolo con el Doppler de ultrasonidos (US y eco Doppler color. Entre enero de 2006 y marzo de 2007 se realiza en 11 pacientes (13 DIEP un estudio comparativo prospectivo entre el Doppler de US, eco Doppler color y Angio TC con reconstrucción tridimensional, utilizando como dato de referencia los hallazgos intraoperatorios. En dicho proceso se localiza la mejor perforante que pueda servir como pedículo al colgajo DIEP en función de su localización, calibre, trayecto y relaciones anatómicas con respecto al músculo. La Angio TC con reconstrucción tridimensional, demuestra una especificidad del 100% (IC 95% 75.3-100 lo que le convierte en una prueba con un alto valor predictivo positivo y una excelente herramienta en la planificación de los colgajos de perforantes. El eco Doppler color determinó, que tan sólo en un 46,1% (IC 95% 19,2-74,9 de los pacientes, la perforante seleccionada por la prueba de forma preoperatoria, coincidía con la perforante elegida en quirófano. Con el Doppler de US, en un 30,8 % (IC 95% 9,1-61,4 de los colgajos estudiados, coincidía la mejor perforante escogida de forma preoperatoria, con los hallazgos obtenidos tras la disección del colgajo. En el presente estudio, la Angio TC tridimensional se ha mostrado como una técnica con una gran especificidad que proporciona valiosa información, sólo comparable con la disección anatómica y por delante de pruebas como el Doppler de ultrasonidos y el eco Doppler color.The aim of this report, is to validate the Angio-CT technique with three-dimentional reconstruction as a preoperative planning tool, after comparison with Doppler ultrasound and color- Duplex. Between january 2006 and march 2007, we studied 11 consecutive patients (13 DIEP in whom a prospective comparative followed up was performed comparing, the findings observed using

  1. Duplex Color Doppler Evaluation of Retinal Arterial Blood Flow in Type 2 Diabetic Subjects without Retinopathy

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    Mashah Binte Amin

    2014-09-01

    Full Text Available Background: Diabetic retinopathy is a vascular disorder affecting the microvasculature of retina. It is caused by changes in the blood vessels of retina. If untreated, it may lead to blindness which is usually preventable if retinopathy is diagnosed early and treated promptly. In ophthalmology, color Doppler imaging is a new method that enables us to assess the orbital vasculature. It allows for simultaneous two dimensional anatomical and Doppler evaluations of hemodynamic characteristics of retinal artery. Objective: To observe the difference between Doppler flow velocity indices (peak systolic velocity, end diastolic velocity and resistive index of retinal artery in type 2 diabetic subjects without retinopathy and those of normal controls. Materials and Methods: This case-control study was carried out in the department of Radiology and Imaging, Bangladesh Institute of Research and Rehabilitation in Diabetes, Endocrine and Metabolic Disorders (BIRDEM in collaboration with Ophthalmology Outpatient Department, BIRDEM, Dhaka from July 2011 to June 2013. Eighty diabetic patients without retinopathy aged 27–68 years were enrolled as cases and age and sex matched 80 healthy subjects were selected as controls. Type 1 diabetic patients, type 2 diabetics with retinopathy, hypertensive and dyslipidemic subjects were excluded from the study. All the selected subjects underwent duplex Doppler ultrasonography of both eyes using 5 to 7.5 MHZ linear phase transducer. Duplex color Doppler findings including spectral analysis (PSV, EDV and RI were recorded. Unpaired t test was done to compare blood flow velocity indices of retinal artery in type 2 diabetic patients without retinopathy and that of healthy control subjects. p value <0.05 was considered as significant. Results: Majority (42.5% and 47.5% of subjects were in 4th decade of life in both groups with predominance of males. The mean duration of diabetes was 4.56 ± 2.1 years. Mean peak systolic

  2. The role of trapped bubbles in kidney stone detection with the color Doppler ultrasound twinkling artifact

    Science.gov (United States)

    Simon, Julianna C.; Sapozhnikov, Oleg A.; Kreider, Wayne; Breshock, Michael; Williams, James C., Jr.; Bailey, Michael R.

    2018-01-01

    The color Doppler ultrasound twinkling artifact, which highlights kidney stones with rapidly changing color, has the potential to improve stone detection; however, its inconsistent appearance has limited its clinical utility. Recently, it was proposed stable crevice bubbles on the kidney stone surface cause twinkling; however, the hypothesis is not fully accepted because the bubbles have not been directly observed. In this paper, the micron or submicron-sized bubbles predicted by the crevice bubble hypothesis are enlarged in kidney stones of five primary compositions by exposure to acoustic rarefaction pulses or hypobaric static pressures in order to simultaneously capture their appearance by high-speed photography and ultrasound imaging. On filming stones that twinkle, consecutive rarefaction pulses from a lithotripter caused some bubbles to reproducibly grow from specific locations on the stone surface, suggesting the presence of pre-existing crevice bubbles. Hyperbaric and hypobaric static pressures were found to modify the twinkling artifact; however, the simple expectation that hyperbaric exposures reduce and hypobaric pressures increase twinkling by shrinking and enlarging bubbles, respectively, largely held for rough-surfaced stones but was inadequate for smoother stones. Twinkling was found to increase or decrease in response to elevated static pressure on smooth stones, perhaps because of the compression of internal voids. These results support the crevice bubble hypothesis of twinkling and suggest the kidney stone crevices that give rise to the twinkling phenomenon may be internal as well as external.

  3. The role of trapped bubbles in kidney stone detection with the color doppler ultrasound twinkling artifact.

    Science.gov (United States)

    Simon, Julianna C; Sapozhnikov, Oleg A; Kreider, Wayne; Breshock, Michael; Williams, James C; Bailey, Michael R

    2017-11-13

    The color Doppler ultrasound twinkling artifact, which highlights kidney stones with rapidly changing color, has the potential to improve stone detection; however, its inconsistent appearance has limited its clinical utility. Recently, it was proposed stable crevice bubbles on the kidney stone surface cause twinkling; however, the hypothesis is not fully accepted because the bubbles have not been directly observed. In this paper, the micron or submicron-sized bubbles predicted by the crevice bubble hypothesis are enlarged in kidney stones of five primary compositions by exposure to acoustic rarefaction pulses or hypobaric static pressures in order to simultaneously capture their appearance by high-speed photography and ultrasound imaging. On filming stones that twinkle, consecutive rarefaction pulses from a lithotripter caused some bubbles to reproducibly grow from specific locations on the stone surface, suggesting the presence of pre-existing crevice bubbles. Hyperbaric and hypobaric static pressures were found to modify the twinkling artifact; however, the simple expectation that hyperbaric exposures reduce and hypobaric pressures increase twinkling by shrinking and enlarging bubbles, respectively, largely held for rough-surfaced stones but was inadequate for smoother stones. Twinkling was found to increase or decrease in response to elevated static pressure on smooth stones, perhaps because of the compression of internal voids. These results support the crevice bubble hypothesis of twinkling and suggest the kidney stone crevices that give rise to the twinkling phenomenon may be internal as well as external. © 2017 Institute of Physics and Engineering in Medicine.

  4. Accuracy of color Doppler ultrasonography and magnetic resonance imaging in diagnosis of placenta accreta: A survey of 82 cases.

    Science.gov (United States)

    Ayati, Sedigheh; Leila, Leila; Pezeshkirad, Masoud; Seilanian Toosi, Farokh; Nekooei, Sirous; Shakeri, Mohammad Taghi; Golmohammadi, Mansoureh Sadat

    2017-04-01

    Placenta adhesive disorder (PAD) is one of the most common causes of postpartum hemorrhage and peripartum hysterectomy. The main risk factors are placenta previa and prior uterine surgery such as cesarean section. Diagnosis of placenta adhesive disorders can lead to a decrease of maternal mortality and morbidities. The purpose of this study was to compare the accuracy of color Doppler ultrasonography and magnetic resonance imaging (MRI) in the diagnosis of PADs. In this is cross-sectional study, Eighty-two pregnant women who were high risk for PAD underwent color Doppler ultrasound and MRI after 18 weeks of gestation. The sonographic and MRI findings were compared with the final pathologic or clinical findings. PDoppler sonography sensitivity was 87% and MRI sensitivity was 76% (p=0.37). Doppler sonography specificity was 63% and MRI specificity was 83% (p=0.01). Women with high-risk factors for PAD should undergo Doppler ultrasonography at first. When results on Doppler sonography are equivocal for PAD, MRI can be performed due to its high specificity.

  5. Ultrasonographic Characteristics of the Common Extensor Tendon of the Elbow in Asymptomatic Individuals: Thickness, Color Doppler Activity, and Bony Spurs.

    Science.gov (United States)

    Krogh, Thøger P; Fredberg, Ulrich; Ammitzbøl, Christian; Ellingsen, Torkell

    2017-05-01

    Ultrasonography (US) of the common extensor tendon (CET) of the elbow is often part of the assessment of patients with lateral epicondylitis. This US assessment is currently based on general tendinopathy references and not well-defined US entities. To describe CET thickness, color Doppler activity, and bony spurs on US in asymptomatic volunteers and to investigate the influence of sex, age, height, body mass index (BMI), weight, and elbow dominance on the measurements. Cross-sectional study; Level of evidence, 3. Tendon thickness, color Doppler activity, and bony spurs of the CET were measured sonographically in 264 adults (50% women) aged 20 to 96 years. Two different tendon-thickness measuring techniques were applied, labeled the "plateau measure" and the "1-cm measure." Color Doppler activity was based on a 0 to 4 rating scale (negative, grades 0 and 1; positive, grades 2-4). A bony spur was defined as a bony outgrowth (≥0.3 mm) arising at the insertional site of the CET. With both tendon-thickness measuring techniques, the CET in the dominant elbow was thicker than that in the nondominant elbow, and male tendons were thicker than female tendons (all P ≤ .03). In regression analysis, tendon thickness correlated with weight, color Doppler activity, and arm dominance for both measuring techniques in multiple regression analysis. In addition, the plateau measure correlated with height and the presence of bony spurs. No correlations were observed regarding BMI, sex, or age. Positive color Doppler activity was found in 9% of examined elbows, with no difference between the sexes regarding dominant versus nondominant elbows (all P ≥.20). Bony spurs were found to increase with age, from 23% for people in their 20s to 74% in people older than 70 years. Bony spurs were more common in the dominant elbow ( P ≤ .01). Women had a higher prevalence of bony spurs than men, but only in the dominant elbow ( P = .03). This study presents the US characteristics and normal

  6. Comparison of brucella and non-specific epididymorchitis: gray scale and color Doppler ultrasonographic features

    Energy Technology Data Exchange (ETDEWEB)

    Ozturk, Adil [Department of Radiology, Harran University School of Medicine, Arastirma ve Uygulama Hastanesi, TR-63100 Sanliurfa (Turkey)]. E-mail: ozturka26@hotmail.com; Ozturk, Ebru [Department of Radiology, Harran University School of Medicine, Arastirma ve Uygulama Hastanesi, TR-63100 Sanliurfa (Turkey); Zeyrek, Fadile [Department of Microbiology, Harran University School of Medicine, Sanliurfa (Turkey); Onur, Kahraman [Department of Urology, SSK Sanliurfa Hastanesi, Sanliurfa (Turkey); Sirmatel, Ocal [Department of Radiology, Harran University School of Medicine, Arastirma ve Uygulama Hastanesi, TR-63100 Sanliurfa (Turkey); Kat, Nurcan [Department of Radiology, Harran University School of Medicine, Arastirma ve Uygulama Hastanesi, TR-63100 Sanliurfa (Turkey)

    2005-11-01

    Objective: The aim of this study is to find out if it is possible to differentiate between brucellar and non-specific epididymorchitis by comparing ultrasonography (US) and color Doppler ultrasonography (CDUS) findings. Material and methods: Fifty-six patients diagnosed to have epididymorchitis both clinically and ultrasonographically were included to study. All of the patients were investigated serologically for brucella. Twenty-eight of those patients were admitted brucella epididymorchitis because of high agglutinations titers for brucella. The other 28 patients were admitted non-specific epididymorchitis because of normal agglutinations titers for brucella. Testicular size, echogenicity, hydrocele, internal echoes and/or septations within hydrocele, and scrotal skin thickness of normal and involved testis were compared by ultrasonography. Besides, pick systolic velocity, end diastolic velocity, resistive index and pick systolic velocity ratio values were measured by bilateral testicular color Doppler ultrasonography in both groups. When the p-value is <0.05, the difference between groups is accepted as statistically significant. Results: Thickening of scrotal skin was seen in 17 of 28 patients with brucella epididymorchitis (BEPO) (67%) and in 25 of 28 patients with non-specific epididymorchitis (NEPO) (89.2%) (p < 0.01). There was no difference between groups regarding presence of hydrocele. However hydrocele seen in all patients was anechoic except for two patients (8.6%). Hydrocele seen in 18 of 22 patients with BEPO and hydrocele had internal echogenicity or septation (p < 0.001). Sizes of testes and epididymis were found to be increased in involved testis compared to normal testis. Testes of all patients with NEPO were homogenous with decreased echogenicity except for five patients (17.8%). However, 23 patients with BEPO (82%) found to have heterogenous testis (p < 0.001). Spectral measurements showed increased PSV and EDV values and decreased RI values in

  7. Prediction of early hepatic artery thrombosis by intraoperative color Doppler ultrasound in pediatric segmental liver transplantation.

    Science.gov (United States)

    Gu, Li H; Fang, Hua; Li, Feng H; Li, Ping; Zhu, Cai X; Zhu, Jian J; Zhang, Shi J

    2012-01-01

    Early hepatic artery thrombosis (eHAT) after transplantation is associated with a high incidence of graft failure and mortality in pediatric segmental liver transplantation (LT). The evaluation of intraoperative color Doppler ultrasound (CD-US) parameters and their sensitivity and specificity for the prediction of eHAT were important. Pediatric segmental LTs were performed in 49 consecutive patients from October 2006 to December 2010 in our hospital. A total of seven patients (14.3%) experienced eHAT (within one month) after LT. The intraoperative hepatic artery (HA) diameter (p = 0.026), hepatic arterial peak systolic velocity (HAPSV) (p = 0.006), and hepatic artery resistance index (HARI) (p = 0.000) had significant difference between eHAT group and non-eHAT group. Taking a HA diameter <2 mm, a HAPSV of <40 cm/s and a HARI of <0.6 as threshold to predict eHAT, the sensitivity and specificity were 85.7%, 85.7%, 85.7%, and 61.9%, 76.2%, 88.1%, respectively. A HARI of <0.6 was shown to be the most sensitive and specific single parameter for predicting eHAT. © 2012 John Wiley & Sons A/S.

  8. Comparison of pulsed wave and color Doppler myocardial velocity imaging in healthy dogs.

    Science.gov (United States)

    Wess, G; Killich, M; Hartmann, K

    2010-01-01

    Tissue velocity imaging (TVI) is increasingly used in small animal cardiology. Tissue velocity of the myocardial wall can be measured by pulsed wave (PW) or color Doppler (CD) imaging methods. Currently, the same reference ranges are used for PW TVI and CD TVI methods. However, if and how both methods correlate, and whether they can be used interchangeably, have not been assessed in small animals. To compare the results of PW TVI and CD TVI measurements. Seventy-one healthy dogs. Longitudinal myocardial velocity profiles were recorded from the 4-chamber left apical view. Peak maximal systolic (S), early (E), and late diastolic (A) velocities were measured off-line in a blinded fashion in the septal and lateral left ventricular wall by PW TVI and CD TVI. Differences between peak PW TVI and CD TVI waves were analyzed by a paired t-test. Regression analysis and Bland-Altman difference plots also were used to assess agreement between methods. There was a significant correlation between PW TVI and CD TVI (P waves measured by PW TVI were significantly higher than the CD TVI values (P < .001). Peak systolic and diastolic PW velocities were approximately 2.20 cm/s higher than corresponding mean CD TVI velocities. PW TVI measurements are significantly higher compared with CD TVI measurements. Theses differences are clinically relevant. These methods should not be used interchangeably, and different reference ranges for PW TVI and CD TVI should be used.

  9. Diagnostic value of color Doppler ultrasonography and MDCT angiography in complications of hemodialysis fistulas and grafts

    Energy Technology Data Exchange (ETDEWEB)

    Cansu, Aysegul, E-mail: drcansu@gmail.com [Department of Radiology, Karadeniz Technical University, School of Medicine, Farabi Hospital, 61080 Trabzon (Turkey); Soyturk, Mehmet; Ozturk, Mehmet Halil; Kul, Sibel [Department of Radiology, Karadeniz Technical University, School of Medicine, Farabi Hospital, 61080 Trabzon (Turkey); Pulathan, Zerrin [Department of Cardiovascular Surgery, Karadeniz Technical University, School of Medicine, Farabi Hospital, 61080 Trabzon (Turkey); Dinc, Hasan [Department of Radiology, Karadeniz Technical University, School of Medicine, Farabi Hospital, 61080 Trabzon (Turkey)

    2013-09-15

    Purpose: The purpose of the study was to compare the diagnostic value of color Doppler ultrasonography (CDUS) and multidetector computed tomography (MDCT) angiography against that of digital subtraction angiography (DSA) or surgery in the evaluation of failing hemodialysis arteriovenous fistulas (AVFs). Materials and methods: CDUS and MDCT angiography were performed with 41 patients (24 men, 17 women; mean age 55.8) with dysfunctional hemodialysis fistulas. The presence of stenosis, thrombosis, aneurysm, pseudoaneurysm and seroma were recorded. The sensitivity, specificity, positive and negative predictive values (PPV and NPV) and accuracy of CDUS and MDCT angiography were calculated both individually and in combination for the detection of vascular segments with significant stenosis, thrombosis, aneurysms, pseudoaneurysms, perivascular complications and stenosis subgroups. Results: Sixty-four segmental lesions were diagnosed by DSA or surgery. Sensitivity, specificity, PPV, NPV and accuracy of CDUS for all vascular tree lesions were 85.9%, 99.2%, 96.4%, 96.7% and 94.5%, respectively. For MDCT angiography the figures were 96.8%, 99.6%, 98.4%, 99.2% and 98.5%, respectively. When both tests were used in combination, sensitivity, specificity, PPV, NPV and accuracy for all vascular tree lesions rose to 100%. Conclusion: Combined use of MDCT and CDUS for diagnosis of AVF dysfunctions is of equivalent value to surgery or DSA, a gold standard technique.

  10. Tricuspid and mitral regurgitation detected by color flow Doppler in the acute phase of Kawasaki disease

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, A.; Kamiya, T.; Tsuchiya, K.; Sato, I.; Arakaki, Y.; Kohata, T.; Ono, Y.

    1988-02-01

    Valvular lesions in the acute phase of Kawasaki disease were studied in 19 children. The patients were intensively observed by color flow Doppler every day from the day of hospitalization up to 12 days after the onset of the disease and 2 or more times a week thereafter, for up to 28 days. Mitral regurgitation (MR) was found in 9 patients (47%) and tricuspid regurgitation (TR) in 10 (53%). MRs were of transient type and confirmed from 7.5 +/- 1.6 (mean +/- standard deviation) to 13.1 +/- 6.5 days after the onset of the disease. Both types of valvular regurgitation were mild. The direction of regurgitation was from the center of valvular coaptation toward the posterior wall of the atrium. Neither valvular prolapse nor valvular deformity was noted. In patients with MR, left ventricular ejection fraction on M-mode echocardiography was significantly lower in the acute phase than in the convalescent phase of the disease (p less than 0.05). Using gallium-67 scintigram, the positive uptake of the isotope was noted in 7 (88%) of 8 patients with MR, but not found at all in 8 patients free of MR. These results suggest that MR and TR are often transient in the acute phase of Kawasaki disease and could be attributed to myocarditis.

  11. [Apply of RetCam Ⅱ and color Doppler imaging in persistent hyperplastic primary vitreous].

    Science.gov (United States)

    Han, Mei; Zhao, Kanxing; Zhang, Tongmei; Li, Yan; Gao, Jianmin; Dong, Liu

    2016-05-01

    To observe the manifestations of RetCam Ⅱ and color Doppler imaging (CDI) in a retrospective case series of persistent hyperplastic primary vitreous (PHPV). Retrospective study. The medical records of 9 eyes/9 patients with PHPV went through RetCamⅡ and CDI from 2009 to 2014. There were 6 young boys and 3 young girl in this study, age from 2 months to 5 years. All the patients were born at full term. 9 eyes had complication (cataract). The manifestations of RetCam Ⅱ: There were pale in optic disc. There were white fibre rod connected with optic disc, then prolonged to vitreous cavity, connected with posterior lens capsule. CDI showed arterial blood stream signal in band-shaped echogenic structure within vitreous cavity, prolonged to lens from the optic disc, or showed funnel-shaped echogenic mass at the posterior surface of lens and anterior of vitreous body, adhered to ciliary body, lens and the optic disc. PHPV is congenital ocular anomalies because of a failure of primary vitreous and the hyaloids vascular system to regress. It manifests as unilateral and boys. We diagnosis PHPV by RetCamⅡ and CDI.

  12. Differential effect of 3-dimensional color Doppler echocardiography for the quantification of mitral regurgitation according to the severity and characteristics.

    Science.gov (United States)

    Choi, Jaehuk; Heo, Ran; Hong, Geu-Ru; Chang, Hyuk-Jae; Sung, Ji Min; Shin, Sang Hoon; Cho, In Jeong; Shim, Chi-Young; Chung, Namsik

    2014-05-01

    The aim of this study is to explore the differential effect of 3-dimensional color Doppler echocardiography for the quantification of mitral regurgitation (MR). Two-dimensional color Doppler echocardiography-based MR quantification has well-documented limitations. We consecutively enrolled 221 patients with MR. Adequate image quality was obtained by 2D- and 3D-color Doppler echocardiography in 211 (95.5%) patients. The quantitative differences between the MR volumes obtained by 2D- and 3D-proximal isovelocity surface area (PISA) were analyzed in various MR subgroups. In the validation cohort (n=52), MR volume obtained by 3D-PISA showed a better agreement with phase-contrast cardiac MRI than 2D-PISA (r=0.97 versus 0.84). In all 211 patients, 2D-PISA underestimated the MR volume when compared with 3D-PISA (52.4±19.6 versus 59.5±25.6 mL; P=0.005). A total of 33.3% with severe MR based on 3D-PISA were incorrectly assessed by 2D-PISA as having nonsevere MR. In the subgroup analysis, the MR severity (odds ratio, 6.96; 95% confidence interval, 3.04-15.94; P15 mL) between 2D- and 3D-PISA methods. Quantification of MR by 3D-PISA method is clinically feasible and more accurate than the current 2D-PISA method. MR quantification by 2D-PISA significantly underestimated MR volume with severe, eccentric MR with an asymmetrical orifice. This article demonstrates that 3D-color Doppler echocardiography could be used as a valuable tool to confirm treatment strategy in patients with significant MR. © 2014 American Heart Association, Inc.

  13. Stimulated acoustic emission detected by transcranial color doppler ultrasound : a contrast-specific phenomenon useful for the detection of cerebral tissue perfusion

    National Research Council Canada - National Science Library

    Pohl, C; Tiemann, K; Schlosser, T; Becher, H

    2000-01-01

    ... stimulated acoustic emission (SAE). The purpose of this study was to investigate whether SAE might be detected by transcranial color Doppler imaging and whether these signals might be used for cerebral tissue perfusion measurements...

  14. Spectral pulsed-wave tissue Doppler imaging lateral-to-septal delay fails to predict clinical or echocardiographic outcome after cardiac resynchronization therapy

    NARCIS (Netherlands)

    O.I.I. Soliman (Osama Ibrahim Ibrahim); D.A.M.J. Theuns (Dominic); M.L. Geleijnse (Marcel); A. Nemes (Attila); K. Caliskan (Kadir); W.B. Vletter (Wim); L.J.L.M. Jordaens (Luc); F.J. ten Cate (Folkert)

    2007-01-01

    textabstractAims: The current study sought to assess if pre-implantation lateral-to-septal delay (LSD) ≥60 ms assessed by spectral pulsed-wave myocardial tissue Doppler imaging (PW-TDI) could predict successful long-term outcome after cardiac resynchronization therapy (CRT). Methods and results

  15. Subacute granulomatous (de Quervain) thyroiditis: grayscale and color Doppler sonographic characteristics.

    Science.gov (United States)

    Frates, Mary C; Marqusee, Ellen; Benson, Carol B; Alexander, Erik K

    2013-03-01

    To describe the sonographic characteristics of subacute granulomatous (De Quervain) thyroiditis. We retrospectively identified all patients at our institution during the last 11 years who had thyroid sonography with findings suggestive of subacute granulomatous thyroiditis. We then reviewed clinical data and laboratory results to establish the clinical diagnosis. A final diagnosis of subacute granulomatous thyroiditis was made on the basis of clinical symptoms, suppressed thyrotropin, an elevated erythrocyte sedimentation rate, and/or reduced or absent radionuclide uptake while hyperthyroid. Our study population consisted of 35 patients. Twenty-seven patients (79.4%) met clinical criteria for subacute thyroiditis. Symptoms included neck pain in 26 of 27 patients with subacute thyroiditis. The erythrocyte sedimentation rate ranged from 22 to 101 mm/h. In 21 cases (77.8%), sonography revealed focal, poorly defined, nonovoid areas of decreased echogenicity. Findings were bilateral in 16 patients and unilateral in 5. In the remaining 6, the gland or an entire lobe was diffusely heterogeneous. Color Doppler interrogation was performed in 20 patients. Flow was decreased to the sonographically abnormal areas in 19 (95%) and slightly increased in 1 patient. In all 9 patients who underwent radionuclide scanning, focal defects or large areas of decreased or absent uptake were found during the time of suppressed thyrotropin. Enlarged lymph nodes were noted in 16 patients (59.3%). The positive predictive value of sonography for diagnosing subacute granulomatous thyroiditis is 79.4%. The most common sonographic appearance is poorly defined regions of decreased echogenicity with decreased vascularity in the affected areas.

  16. Correlation of Color Doppler with Multidetector CT Angiography Findings in Carotid Artery Stenosis

    Directory of Open Access Journals (Sweden)

    Živorad N. Savic

    2010-01-01

    Full Text Available The aim of this paper was to examine the correlation between the Color Doppler ultrasound (CD-US and multidetector CT angiography (MDCTA diagnostic methods, and to define the degree and extent of stenosis in patients with internal carotid artery stenosis. This was a cross-sectional study with a consecutive series of patients. All US examinations were always carried out by the same physician-angiologist, while all CT examinations were always carried out by the same physician-radiologist. Both worked independently from each other. The stenosis area was measured at the narrowest point by NASCET criteria for US/CT. Peak systolic velocity (PSV over 210 cm/sec and end diastolic velocity (EDV over 110 cm/sec criteria were applied for stenoses with lumen narrowed over 70%, while PSV under 130 cm/sec and EDV under 100 cm/sec criteria were applied for those with lumen narrowed under 70%. A total of 124 carotid arteries were observed; namely, 89 narrowed and 68 surgically treated. All patients were reviewed by US and then by MDCTA; patients with 70–99% stenosis underwent surgery. The correlation coefficient between stenosis degree measured by US and MDCTA was 0.922; p 0.05. The US and CT matching level for stenoses from 70 to 99% was very high (κ = 0.778, p < 0.01. In conclusion, there is a highly significant statistical correlation among both diagnostic methods when measuring stenosis degree and extent. US is more dependent on the physician, while MDCTA is more objective and independent from the physician. We think it would be appropriate to undertake an MDCTA exam for those patients who are candidates for carotid endarterectomy.

  17. Normal reference values for vertebral artery flow volume by color Doppler sonography in Korean adults

    Energy Technology Data Exchange (ETDEWEB)

    Hong, Hyun Sook; Cha, Jang Gyu; Park, Seong Jin; Joh, Joon Hee; Park, Jai Soung; Kim, Dae Ho; Lee, Hae Kyung; Ahn, Hyun Cheol [Soonchunhyang University Bucheon Hospital, Bucheon (Korea, Republic of)

    2003-09-15

    Vertebrobasilar ischemia has been attributed to a reduction of net vertebral artery flow volume. This study was to establish the reference values for the flow volume of the vertebral artery using color Doppler sonography in the normal Korea adults. Thirty five normal Korea adults without any underlying disease including hypertension, hyperlipidemia, diabetes, heart disease, obesity (body mas index>30), or carotid artery stenosis was included. There were 17 males and 18 females, age ranged from 20 to 53 years (average=32.86 years). Flow velocities and vessel diameters were recorded in the intertransverse (V2) segment, usually at C5-6 level, bilaterally. The flow volume (Q) was calculated. (Q=time averaged mean velocity x cross sectional area of vessel) A lower Flow velocity and smaller vessel diameter were measured on the right side compared to those of the left side, resulting in a lower flow volume. The calculated flow volumes using the equation were 77.0 +- 39.7 ml/min for the right side and 127.6 +- 71.0 ml/min for the left side (p=0.0001) while the net vertebral artery flow volume was 204.6 +- 81.8 ml/min. Decrease in the vertebral artery flow volume was statistically significant with advanced age. (r=-0.36, p=0.032). Vertebral artery blood flow volume was 191.20 +- 59.19 ml/min in male, and 217.28 +- 98.67 ml/min in female (p=0.6). The normal range for the net vertebral artery flow volume defined by the 5th to 95th percentiles was between 110.06 and 364.1 ml/min. The normal range for the net vertebral artery flow volume was between 110.06 and 364.1 ml/min. Vertebral artery flow volume decreased with the increase of age. However, gender did not affect the blood flow volume.

  18. Absence of Doppler signal in transcranial color-coded ultrasonography may be confirmatory for brain death: A case report

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    Mehmet Akif Topçuoğlu

    2015-08-01

    Full Text Available Transcranial Doppler ultrasonography (TCD is a valuable tool for demonstrating cerebral circulatory arrest (CCA in the setting of brain death. Complete reversal of diastolic flow (to-and-fro flow and systolic spikes in bilateral terminal internal carotid arteries and vertebrobasilar circulation are considered as specific sonogram configurations supporting the diagnosis of CCA. Because of the possibility of sonic bone window impermeability, absence of any waveform in TCD is not confirmatory for CCA unless there is documentation of disappearance of a previously well detected signal by the same recording settings. Transcranial color-coded sonography (TCCS with B-mode imaging can reliably detect adequacy of bone windows with clarity contralateral skull and ipsilateral planum temporale visualization. Therefore, absence of detectable intracranial Doppler signal along with available ultrasound window in TCCS can confirm clinical diagnosis of brain death. We herein discuss this entity from the frame of a representative case.

  19. Comparison between color Doppler twinkling artifact and acoustic shadowing for renal calculus detection: an in vitro study.

    Science.gov (United States)

    Shabana, Wael; Bude, Ronald O; Rubin, Jonathan M

    2009-02-01

    To assess the ability of the color Doppler twinkling artifact to detect renal stones relative to acoustic shadowing, we scanned seven uric acid calculi embedded in a tissue mimicking phantom and in sheep kidneys using a high frequency linear array and a standard curved linear array ultrasound scanheads (L12-5 and C5-2; Philips Ultrasound, Bothel, WA, USA). The stones were scanned in and out of focus. The scans were optimized for shadow formation in gray-scale imaging and for color twinkling in color Doppler imaging. The images were analyzed using Image J (http://rsb.info.nih.gov/ij/). We calculated the contrast to noise ratios (C/N) for the acoustic shadows and the color twinkling artifact compared with background. These measurements were then evaluated using a single factor analysis of variance (ANOVA) and paired two-tailed t tests. With these comparisons, the C/Ns for twinkling were significantly higher than for acoustic shadowing. On average, twinkling produced 19.2 dB greater C/Ns for stones in the phantom and 17.6 dB more for the stones in the kidneys. In addition, ANOVA showed that twinkling is resistant to focusing and scanning frequency differences. The results suggest that the twinkling artifact is a robust method for detecting the presence of renal calculi. The color signature is easier to detect than is acoustic shadowing. Twinkling may be relatively resistant to many of the problems that plague ultrasound examinations for renal stones, i.e., out-of-focus scans that might be caused by beam aberration effects due to patient body habitus.

  20. Color Doppler imaging and pattern visual evoked potential in normal tension glaucoma and hypertension glaucoma.

    Science.gov (United States)

    Zhong, Yisheng; Min, Yingjun; Jiang, Ying; Cheng, Yu; Qin, Jiao; Shen, Xi

    2009-12-01

    To compare the differences in color Doppler imaging (CDI) and pattern visual evoked potential (P-VEP) examinations between normal tension glaucoma (NTG) and hypertension primary open angle glaucoma (HTG) patients, and investigate the relation between flow velocities measured by CDI and P-VEP examination in NTG and HTG patients. Sixty NTG patients, 66 HTG patients and 44 control subjects underwent CDI evaluation of the ophthalmic artery (OA), short posterior ciliary artery (SPCA) and central retinal arteries (CRA). The peak systolic velocities (PSV) and end-diastolic velocities (EDV) and resistive index (RI) of all retrobulbar vessels were measured. The latency and amplitude of P100 in P-VEP were recorded from the three groups. The differences of CDI and P-VEP parameters among NTG group, HTG group and control group were compared by one-way analysis of variance. The correlations between CDI parameters and visual field indices, P-VEP and visual field indices, P-VEP and CDI parameters in NTG and HTG patients were evaluated by Pearson's correlation analysis. NTG and HTG patients had the lower EDV and higher RI in the OA, CRA and SPCA comparing with that of control subjects. NTG and HTG patients also had lower PSV in OA and CRA comparing with that of control subjects. There was no significant difference in the blood flow velocities and RI of all retrobulbar vessels between NTG and HTG patients. The latency of P100 in VEP delayed and the amplitude of P100 decreased in the NTG and HTG patients comparing with that of the control group. There was no significant difference in the latency and amplitude of P100 between the NTG and HTG patients. The RI of OA and SPCA were negatively correlated with the mean deviation (MD) values in the NTG and HTG patients. The RI of OA was positively correlated with the PSD value in the NTG and HTG patients. The MD values in the NTG and HTG patients were negatively correlated with the latency time of P100. The RI of OA was positively correlated

  1. Color Doppler evaluation of the ocular arterial flow changes in chronic obstructive pulmonary disease

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    Ozer, Tulay [Department of Radiology, Karaelmas University, School of Medicine, Tip Fakueltesi, Radyoloji AD, 67600-Kozlu, Zonguldak (Turkey)]. E-mail: ozertulay@yahoo.com; Altin, Remzi [Department of Pulmonary Medicine, Karaelmas University, School of Medicine, Kozlu, Zonguldak (Turkey); Ugurbas, Suat Hayri [Department of Ophthalmology, Karaelmas University, School of Medicine, Kozlu, Zonguldak (Turkey); Ozer, Yetkin [Department of Anesthesiology and Reanimation, Karaelmas University, School of Medicine, Kozlu, Zonguldak (Turkey); Mahmutyazicioglu, Kamran [Department of Radiology, Karaelmas University, School of Medicine, Tip Fakueltesi, Radyoloji AD, 67600-Kozlu, Zonguldak (Turkey); Kart, Levent [Department of Pulmonary Medicine, Karaelmas University, School of Medicine, Kozlu, Zonguldak (Turkey)

    2006-01-15

    Purpose: To evaluate the hemodynamic changes in the extraocular orbital vessels of the patients with chronic obstructive pulmonary disease (COPD), using color Doppler ultrasonography (CDU) technique, and to compare the results with those of healthy control subjects. Methods: Forty-five patients with COPD and 17 healthy control subjects were included in this study. Patients with COPD were classified according to the Global Initiative for Chronic Obstructive Lung Disease (GOLD). Fifteen patients of stage I COPD (mild airflow limitation), stage II COPD (worsening airflow limitation) or stage III COPD (severe airflow limitation) were enrolled into Group I, II and III, respectively. End tidal carbon dioxide (EtCO{sub 2}), peripheral oxygen saturation (SpO{sub 2}), pulse rate (PR) and respiratory rate (RR) were measured by using capnograph/pulse oximeter in all patients. Measurements were performed in only one randomly chosen eye of each participant. The peak systolic velocity (PSV), end-diastolic velocity (EDV), and resistance index (RI) were measured in the ophthalmic artery (OA), central retinal artery (CRA), lateral short posterior ciliary artery (LPCA) and medial short posterior ciliary artery (MPCA), using CDU technique. Results: The PSV measurements of the OA were significantly higher in Groups II and III compared to control group (p < 0.01, p < 0.001, respectively). The RI values from OA and CRA were significantly higher in Group II and III than the control group (p < 0.05). The RI values of LPCA and MPCA were also significantly higher in Group II than the control subjects (p < 0.05). When RI values were compared, mean values of LPCA and MPCA were significantly lower in Group III than in Group II (p < 0.05). There were no significant differences between Group I and control patients about PSVs, EDVs and RI values of all arteries Statistically significant correlations were found for the EtCO{sub 2} with PSV (r = 0.53, p < 0.01) and EDV (r = 0.51, p < 0.01) of the

  2. Usefulness of combination of grey-scale and color Doppler ultrasound findings in the diagnosis of ulnar nerve entrapment syndrome

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    Mohammad Ebrahim Ghanei

    2015-01-01

    Full Text Available Background: Ulnar nerve entrapment (UNE has been diagnosed with clinical examination and electrodiagnostic studies. This study was designed to determine the value of a combination of grey-scale and color Doppler ultrasound findings in the diagnosis of patients with UNE. Materials and Methods: During May to August 2013 41 patients with UNE (proven by electrodiagnostic studies and 44 healthy volunteers were evaluated by ultrasound study. Three cross-sectional area (CSA of ulnar nerve around cubital fossa was determined and measured in both groups. The maximum and minimum diameter of ulnar nerve was measured for calculating flattening ratio index (FRI. Vascularity of ulnar nerve around cubital fossa was also examined in proper color Doppler setting. Results: The mean CSA of nerve at all proximal, middle and distal levels were greater in patients with UNE than in controls (P = 0.02, <0.001 and 0.34 respectively. A cut-off point of 10.5 mm 2 for CSA (in the level of the cubital fossa yielded a sensitivity and specificity of 92.7% and 93.2%, respectively. Mean FRI was 3.1 ± 0.6 in patients with UNE group and 1.4 ± 0.2 in the control group with a significant difference (P < 0.001. FRI with cutoff point 2.15 has been shown as an important parameter for the detection of UNE. The vascularity in UNE has a sensitivity and specificity of 66% and 93.2%, respectively, and has a higher probability of being positive in severe UNE. Conclusion: Combination of grey-scale and color Doppler ultrasound may provide valuable diagnostic criteria and severity assessment of UNE.

  3. The application of color Doppler flow imaging in the diagnosis and therapeutic effect evaluation of erectile dysfunction

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    Xu-Jun Xuan

    2016-01-01

    Full Text Available We aim to investigate the correlations between hemodynamic parameters, penile rigidity grading, and the therapeutic effects of phosphodiesterase type 5 inhibitors using color Doppler flow imaging after intracavernosal injection in patients with erectile dysfunction. This study involved 164 patients. After intracavernosal injection with a mixture of papaverine (60 mg, prostaglandin E 1 (10 mg, and lidocaine (2%, 0.5-1 ml, the penile vessels were assessed using color Doppler flow imaging. Penile rigidity was classified based on the Erection Hardness Score system as Grades 4, 3, 2 or 1 (corresponding to Schramek Grades V to II. Then, the patients were given oral sildenafil (50-100 mg and scored according to the International Index of Erectile Function (IIEF-5 questionnaire. The number of patients with penile rigidities of Schramek Grades II to V was 14, 18, 21, and 111, respectively. The IIEF-5 score was positively correlated with the refilling index of the penile cavernosal artery (r = 0.79, P< 0.05, the peak systolic velocity (r = 0.45, P< 0.05, and penile rigidity (r = 0.75, P< 0.05, and was negatively correlated with the end diastolic velocity (r = −0.74, P< 0.05. For patients with erectile dysfunction, both the IIEF-5 score after sildenafil administration, which is correlated with penile rigidity, and the hemodynamic parameters detected using color Doppler flow imaging may predict the effects of phosphodiesterase type 5 inhibitor treatment and could provide a reasonable model for the targeted-treatment of erectile dysfunction.

  4. Value of color doppler ultrasound, kub and urinalysis in diagnosis of renal colic due to ureteral stones

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    Mahmoud Abdel-Gawad

    2014-08-01

    Full Text Available Purpose Despite the routine use of helical CT in diagnosis of renal colic, there are recent concerns regarding the radiation exposure, overuse and costs. We attempted in this retrospective study to evaluate the accuracy of ultrasound (gray-scale and color Doppler with twinkling, KUB and urinalysis in diagnosis of renal colic due to ureteral calculi presented in Emergency Room. Materials and Methods A total of 939 consecutive cases of renal colic presented to ER have been managed and evaluated by ureteral ultrasound, KUB and urinalysis for the presence of ureteral stones. Non-confirmatory cases were subjected to Helical CT examination. Results Renal and ureteral ultrasound (gray-scale alone detected ureteral calculi in 615 cases (65.4% and after utilizing Color Doppler Ultrasound with twinkling the diagnosis was made with confidence in 935 cases (99.6% but 4 (0.4%. KUB showed radiopaque stones in 503 (53.6% patients and no stones were detected in 436 (46.4%. Microhematuria presented in 835 (88.9% cases while absent in 102 (10.9%. There were 190 (20.3%, 77 (8.2% and 671 (71.5% patients with upper, middle and lower ureteral stones respectively. The simultaneous positive findings in US and KUB with microhematuria were found only in 453 (48.2% cases. Conclusions The use of Color Doppler ultrasound with twinkling increased the detection rate of ureteral stones in acute renal colic patients presented to ER with less radiation exposure. Ultrasound examination as a single modality is superior to KUB and urinalysis in initial diagnosis of renal colic.

  5. Effect of volume reduction on diastolic echocardiographic parameters in hemodialyzed patients

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    Hekmat R

    2007-09-01

    Full Text Available Background: Cardiovascular problems including arterial hypertension, coronary artery diseases, congestive heart failure are prevalent among chronic hemodialyzed patients. Ultrafiltration of hemodialyzed patient's serum, which culminating in intravascular volume reduction, is frequently used during hemodialysis. One of the restrictions of the echocardiographic evaluation of the diastolic heart function is the intravascular volume dependency of some echocardiographic parameters. In this study we have evaluated the volume dependency of certain echocardiography parameters in chronically hemodialyzed patients. Methods: Thirteen patients undergoing chronic hemodialysis in Ghaem Hospital Hemodialysis Center in Mashhad, Iran, were evaluated one hour before and immediately after hemodialysis for the following: all diastolic echocardiographic parameters, left ventricular function, left ventricular systolic function, inferior vena cava (IVC diameter and IVC collapsibility with inspiration, and systolic and diastolic blood pressure. The echocardiographic parameters were analyzed using the paired Student's t-test. Results: With hemodialysis, there was no significant change in left ventricular function, A wave amplitude and E/F slope, however, there was a significant reduction of the E wave amplitude, increment in E wave deceleration time (p= 0.001, t=-4.14 and a decrease in the E/A ratio (p=0.03, t=2.46. Tissue Doppler echocardiography showed no significant change in mitral annular diastolic motion, E'/A' waves, with hemodialysis (p=0.728, t= - 0.356, although there was a reduction of the E/E' ratio. Conclusion: Tissue Doppler imaging and color M-mode echocardiographic parameters are independent of the intravascular value status. With no change associated with hemodialysis, these parameters can be used as reliable criteria for evaluating ventricular diastolic function even when the volume status varies.     Hekmat R. *1"nTalebi S

  6. [Endomyocardial fibrosis (its clinico-echocardiographic characteristics)].

    Science.gov (United States)

    Bapumiia, M; Solomakhina, N I; Sumarokov, A V

    1996-01-01

    To compare clinical and echocardiographic features in patients with restrictive cardiomyopathy (RCMP), 15 patients (9 males and 6 females, mean age 34.93 +/- 1.03 years, duration of the disease 9 +/- 4.2 months) were examined using complete echocardiographic and doppler echocardiographic investigation in impulse regimen. Endomyocardial fibrosis was not obvious clinically, but should be suspected in dyspnea upon a weak exercise, undue fatiguability, tachycardia in normal arterial pressure and size of the heart. Echocardiographic indications, on the contrary, were rather specific. Endomyocardial fibrosis is characterized by diminished ventricular cavities, thickening of the endocardium and subvalvular structures, changed shape of ventricular cavity, echo-CG signs of passive pulmonary hypertension, diastolic dysfunction of the left and right ventricles.

  7. Contribution of spiral artery blood flow changes assessed by transvaginal color Doppler sonography for predicting endometrial pathologies

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    Suna Kabil Kucur

    2013-01-01

    Full Text Available ive: To investigate the diagnostic value of blood flow measurements in spiral artery by transvaginal color Doppler sonography (CDS in predicting endometrial pathologies.Methods: Ninety-seven patients presenting with abnormal uterine bleeding and requiring endometrial assessment were included in this prospective observational study. Endometrial thickness, structure and echogenicity were recorded. Pulsatility index (PI and resistive index (RI of the spiral artery were measured by transvaginal CDS. Endometrial sampling was performed for all subjects. Sonographic and hystopathologic findings were compared.Results: The histopathological diagnoses were as follows; 39 cases (40.2% endometrial polyp, 9 cases (9.3% endometrial hyperplasia, 10 cases (10.3 submucous myoma, 7 cases (7.2% endometrium cancer, and 32 cases (33% nonspecific findings. The spiral artery PI in endometrium cancer group was highly significantly lower than other groups (p<0.01. The spiral artery RI was also significantly lower in the patients with malignant histology (p<0.05. Conclusion: Endometrial pathologies are associated significantly with endometrial spiral artery Doppler changes.Key words: Spiral artery, Doppler ultrasonography, endometrium

  8. The application of color Doppler flow imaging in the diagnosis and therapeutic effect evaluation of erectile dysfunction.

    Science.gov (United States)

    Xuan, Xu-Jun; Bai, Gang; Zhang, Cai-Xia; Xu, Chao; Lu, Fu-Ding; Peng, Yang; Ma, Gang; Han, Cong-Hui; Chen, Jun

    2016-01-01

    We aim to investigate the correlations between hemodynamic parameters, penile rigidity grading, and the therapeutic effects of phosphodiesterase type 5 inhibitors using color Doppler flow imaging after intracavernosal injection in patients with erectile dysfunction. This study involved 164 patients. After intracavernosal injection with a mixture of papaverine (60 mg), prostaglandin E 1 (10 mg), and lidocaine (2%, 0.5-1 ml), the penile vessels were assessed using color Doppler flow imaging. Penile rigidity was classified based on the Erection Hardness Score system as Grades 4, 3, 2 or 1 (corresponding to Schramek Grades V to II). Then, the patients were given oral sildenafil (50-100 mg) and scored according to the International Index of Erectile Function (IIEF-5) questionnaire. The number of patients with penile rigidities of Schramek Grades II to V was 14, 18, 21, and 111, respectively. The IIEF-5 score was positively correlated with the refilling index of the penile cavernosal artery (r = 0.79, PDoppler flow imaging may predict the effects of phosphodiesterase type 5 inhibitor treatment and could provide a reasonable model for the targeted-treatment of erectile dysfunction.

  9. Proximal isovelocity surface area by single-beat three-dimensional color Doppler echocardiography applied for tricuspid regurgitation quantification.

    Science.gov (United States)

    de Agustin, Jose Alberto; Viliani, Dafne; Vieira, Catarina; Islas, Fabian; Marcos-Alberca, Pedro; Gomez de Diego, Jose Juan; Nuñez-Gil, Ivan Javier; Almeria, Carlos; Rodrigo, Jose Luis; Luaces, Maria; Garcia-Fernandez, Miguel Angel; Macaya, Carlos; Perez de Isla, Leopoldo

    2013-09-01

    The two-dimensional (2D) proximal isovelocity surface area (PISA) method has known technical limitations, mainly the geometric assumptions of PISA shape required to calculate effective regurgitant orifice area (EROA). Recently developed single-beat real-time three-dimensional (3D) color Doppler imaging allows the direct measurement of PISA without geometric assumptions and has already been validated for mitral regurgitation assessment. The aim of this study was to apply this novel method in patients with chronic tricuspid regurgitation (TR). Ninety patients with chronic TR were enrolled. EROA and regurgitant volume (Rvol) were assessed using transthoracic 2D and 3D PISA methods. Quantitative Doppler and 3D transthoracic planimetry of EROA were used as reference methods. Both EROA and Rvol assessed using the 3D PISA method had better correlations with the reference methods than using conventional 2D PISA, particularly in the assessment of eccentric jets. On the basis of 3D planimetry-derived EROA, 35 patients had severe TR (EROA ≥ 0.4 cm(2)). Among these 35 patients, 25.7% (n = 9) were underestimated as having nonsevere TR (EROA ≤ 0.4 cm(2)) using the 2D PISA method. In contrast, the 3D PISA method had 94.3% agreement (33 of 35) with 3D planimetry in classifying severe TR. Good intraobserver and interobserver agreement for 3D PISA measurements was observed, with intraclass correlation coefficients of 0.92 and 0.88 respectively. TR quantification using PISA by single-beat real-time 3D color Doppler echocardiography is feasible in the clinical setting and more accurate than the conventional 2D PISA method. Copyright © 2013 American Society of Echocardiography. Published by Mosby, Inc. All rights reserved.

  10. The clinical significance of reversed flow in the main pulmonary artery detected by doppler color flow imaging.

    Science.gov (United States)

    Murata, I; Sonoda, M; Morita, T; Nakamura, F; Takenaka, K; Nagai, R

    2000-08-01

    Using Doppler color flow imaging, abnormal flow patterns were reported to occur with pulmonary artery (PA) dilation. We have frequently observed red signals in the main PA, suggesting reversed flow (RF) in patients without overt pulmonary hypertension. The clinical implication of these signals has not been extensively studied. We studied 191 of 412 patients referred for echocardiography (99 men and 92 women; mean +/- SD age, 62 +/- 13 years), in whom the main PA diameter had been adequately measured. If a red signal was observed by color flow imaging, a pulsed Doppler echocardiogram of the red signal was recorded simultaneously. The presence of the red signal was correlated with the PA diameter and the PA systolic pressure determined using the modified Bernoulli equation. In 54 patients who also underwent cardiac catheterization studies, the red signal was correlated with PA and pulmonary capillary wedge (PCW) pressures, and with pulmonary vascular resistance. Red signals adjacent to the medial PA border were detected in parallel with systolic blue signals in 127 patients (66%). Pulsed Doppler recordings revealed that they were caused by RF occurring immediately after the forward systolic signal and persisted in diastole. The PA diameter (28 +/- 4.8 mm) and the estimated PA systolic pressure (34 +/- 16 mm Hg) of patients with the RF signal were significantly greater (p < 0.001 and p < 0.05, respectively) than those of patients without the signal (22 +/- 2.5 mm and 28 +/- 6.0 mm Hg, respectively). Among patients who had hemodynamic studies, PA and PCW pressures were significantly higher (p < 0.05) in the 41 patients with the RF signal (22 +/- 12 mm Hg vs 15 +/- 2.6 mm Hg and 11 +/- 5.5 mm Hg vs 8 +/- 3.1 mm Hg, respectively). : RF signals in the main PA occur mostly as a result of PA dilation, which may be caused by primary pulmonary hypertension or chronic elevation of left atrial pressure in left-sided cardiac abnormalities.

  11. Echocardiographic measurement of cart horses in the metropolitan region of Curitiba-PR

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    Amália Turner Giannico

    2015-04-01

    Full Text Available In order to maintain the horses’ performance during the exercise, their hearts adapt to the variations on metabolic activity, resulting in muscular adaptation. Thus, echocardiography allows to assess on both eventual adaptations of heart tissue and impairment of the ability to pump blood. Little is yet known about echocardiography in cart horses, whose general conditions of health and treatment are often inappropriate to the type of exercise they are submitted to. The goal of this study was to establish echocardiographic numbers for cart horses. Nineteen mongrel horses were submitted for echocardiographic examination, and values of the distance from E point (maximum opening mitral valve to the interventricular septum; diameter of left ventricle cavity, interventricular septum thickness and thickness of left ventricle free wall during systole and diastole, fractional shortening and ejection fraction were obtained by M-mode. In the 2D images, diameter of the aortic valve and left atrium were evaluated, and their relationship. The velocities of the blood flow were evaluated in aorta and pulmonary artery and the mitral valve by means of Doppler, and possible insufficiency was detected through the color Doppler. Mean values for echocardiographic parameters were established considering 19 traction horses that worked pulling cart loads. There were no significant values that indicated either an inappropriate cardiac remodeling, a left ventricular dysfunction – with consequent decrease in exercises performance – or diseases that affect the animal’s performance at work.

  12. First trimester two- and four-dimensional cardiac scan: intra- and interobserver agreement, comparison between methods and benefits of color Doppler technique.

    Science.gov (United States)

    Tudorache, S; Cara, M; Iliescu, D G; Novac, L; Cernea, N

    2013-12-01

    To evaluate intra- and interobserver agreement for first-trimester fetal cardiac structural assessment, using two-dimensional (2D) ultrasound (2D-US) and 4D-US (4D spatiotemporal image correlation (STIC) technology), to compare the methods and to assess the advantages of adding color Doppler to each technique. Digital videoclips (B-mode and color Doppler) and 4D-STIC volumes (gray-scale and color Doppler) from 632 pregnancies with normal fetal hearts were acquired and stored at the time of detailed first-trimester ultrasound examination. Later analysis on a randomized sample of 100 cases was performed, targeting 11 cardiac structures and features. We compared visualization of fetal heart parameters using 2D-US vs 4D-US and gray-scale vs color Doppler imaging. STIC volumes were considered satisfactory (adequate visualization of at least 8/11 parameters) in 78% of cases and 2D-US acquisitions in 89% of cases. The intra- and interobserver agreement was good for both 2D and 4D methods (kappa > 0.6), and the percentage overall agreement was very high using both methods (95%). 2D- and 4D-US identification of the fetal cardiac parameters did not differ significantly. The differences between gray-scale and color Doppler imaging were statistically significant in identifying similar key cardiac parameters, for both 2D- and 4D-US (P parameters are feasible and repeatable within and between observers. Color Doppler adds valuable information to both methods. Copyright © 2013 ISUOG. Published by John Wiley & Sons Ltd.

  13. The Diagnostic Value of Transvaginal Sonograph (TVS), Color Doppler, and Serum Tumor Marker CA125, CEA, and AFP in Ovarian Cancer.

    Science.gov (United States)

    Zhang, Fang; Zhang, Zhou-Long

    2015-06-01

    The purpose of this study is to investigate the diagnostic value of transvaginal sonograph (TVS), color Doppler, and serum tumor marker CA125, CEA, and AFP in ovarian cancer. From June, 2011 to May, 2013, 102 cases with adnexal mass were recruited in this study (32 cases of malignant ovarian cancer and 70 cases of benign ovarian tumor according to pathological diagnosis). TVS, color Doppler, and serum tumor markers were used for tumor diagnosis. The sensitivity, specifity, positive prediction, negative prediction, and Youden's index were analyzed. Of the 102 patients, 32 were diagnosed with malignant ovarian cancer and 70 were diagnosed with benign ovarian tumor according to pathological diagnosis. Based on TVS results, 37 cases were malignant while 65 cases were benign. Based on color Doppler results, 34 cases were malignant while 68 cases were benign. Based on TVS and color Doppler results, 35 cases were malignant while 65 were benign. Based on CA125 test results, 34 cases were malignant while 68 cases were benign. Based on CEA test results, 8 cases were malignant and 94 cases were benign. Bases on AFP test results, 9 cases were malignant while 93 cases were benign. Based on the results of combination tumor marker test, 38 cases were malignant while 64 cases were benign. The combination of TVS, color Doppler, and tumor marker test showed optimal diagnostic value with a sensitivity of 90.63 %, specificity of 97.14 %, positive prediction of 93.94 %, negative prediction of 98.55 %, and Youden's index of 94.02 %. The combination of TVS, color Doppler, and tumor marker test is of great diagnostic value, which should be widely used in clinical practice.

  14. Color Doppler-ultrasonography in oral squamous cell carcinoma: Making ultrasonography more meaningful

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    Rahul Gandhi

    2016-01-01

    Conclusions: The said Doppler indices were shown to be sensitive as well as specific for the diagnosis of malignant oral tumors. Although CD-USG cannot replace histopathological procedures, it plays a definite role as an adjunct to the clinical evaluation of OSCC cases.

  15. Effect of scanline orientation on ventricular flow propagation: assessment using high frame-rate color Doppler echocardiography

    Science.gov (United States)

    Greenberg, N. L.; Castro, P. L.; Drinko, J.; Garcia, M. J.; Thomas, J. D.

    2000-01-01

    Color M-mode echocardiography has recently been utilized to describe diastolic flow propagation velocity (Vp) in the left ventricle. While increasing temporal resolution from 15 to 200 Hz, this M-mode technique requires the user to select a single scanline, potentially limiting quantification of Vp due to the complex three-dimensional inflow pattern. We previously performed computational fluid dynamics simulations to demonstrate the insignificance of the scanline orientation, however geometric complexity was limited. The purpose of this study was to utilize high frame-rate 2D color Doppler images to investigate the importance of scanline selection in patients for the quantification of Vp. 2D color Doppler images were digitally acquired at 50 frames/s in 6 subjects from the apical 4-chamber window (System 5, GE/Vingmed, Milwaukee, WI). Vp was determined for a set of scanlines positioned through 5 locations across the mitral annulus (from the anterior to posterior mitral annulus). An analysis of variance was performed to examine the differences in Vp as a function of scanline position. Vp was not effected by scanline position in sampled locations from the center of the mitral valve towards the posterior annulus. Although not statistically significant, there was a trend to slower propagation velocities on the anterior side of the valve (60.8 +/- 16.7 vs. 54.4 +/- 13.6 cm/s). This study clinically validates our previous numerical experiment showing that Vp is insensitive to small perturbations of the scanline through the mitral valve. However, further investigation is necessary to examine the impact of ventricular geometry in pathologies including dilated cardiomyopathy.

  16. [Color echo-doppler of the ureterovesical stream. Normal aspects. Application to the acute ureteral obstruction].

    Science.gov (United States)

    Thomas, E; Menu, Y; Servois, V; Hercot, O; Boccon-Gibod, L; Laissy, J P

    1993-02-01

    A colour Doppler ultrasound study of the ureterovesical was performed to define the normal features, variants and abnormalities of the ureteric stream by comparing 50 normal subjects and 19 subjects with renal colic due to ureteric stones. The examination included assessment of the frequency, intensity, morphology and symmetry of the ureterovesical stream. In normal subjects, the stream was either absent, especially in the case of fluid restriction (36%), present and symmetrical (34%) or asymmetrical (30%). In patients with ureteric stones, during a non-painful period and in the absence of obstruction on IVU, the stream was normal and symmetrical (9%) while during a painful period with obstruction on IVU, the ureteric stream was either absent (47%) or abnormal and asymmetrical (31%). A continuous stream, very suggestive of obstruction, was observed in 5 cases. Colour Doppler ultrasound is a new, simple method which may be helpful in the diagnosis of renal colic, particularly in cases in which the pyelocaliceal cavities are not dilated.

  17. Automated quantification of mitral regurgitation by three dimensional real time full volume color Doppler transthoracic echocardiography: a validation with cardiac magnetic resonance imaging and comparison with two dimensional quantitative methods.

    Science.gov (United States)

    Son, Jang-Won; Chang, Hyuk-Jae; Lee, Jin-Kyung; Chung, Hee-Jung; Song, Ran-Young; Kim, Young-Jin; Datta, Saurabh; Heo, Ran; Shin, Sang-Hoon; Cho, In-Jeong; Shim, Chi Young; Hong, Geu-Ru; Chung, Namsik

    2013-06-01

    Accurate assessment of mitral regurgitation (MR) severity is crucial for clinical decision-making and optimizing patient outcomes. Recent advances in real-time three dimensional (3D) echocardiography provide the option of real-time full volume color Doppler echocardiography (FVCD) measurements. This makes it practical to quantify MR by subtracting aortic stroke volume from the volume of mitral inflow in an automated manner. Thirty-two patients with more than a moderate degree of MR assessed by transthoracic echocardiography (TTE) were consecutively enrolled during this study. MR volume was measured by 1) two dimensional (2D) Doppler TTE, using the proximal isovelocity surface area (PISA) and the volumetric quantification methods (VM). Then, 2) real time 3D-FVCD was subsequently obtained, and dedicated software was used to quantify the MR volume. MR volume was also measured using 3) phase contrast cardiac magnetic resonance imaging (PC-CMR). In each patient, all these measurements were obtained within the same day. Automated MR quantification was feasible in 30 of 32 patients. The mean regurgitant volume quantified by 2D-PISA, 2D-VM, 3D-FVCD, and PC-CMR was 72.1 ± 27.7, 79.9 ± 36.9, 69.9 ± 31.5, and 64.2 ± 30.7 mL, respectively (p = 0.304). There was an excellent correlation between the MR volume measured by PC-CMR and 3D-FVCD (r = 0.85, 95% CI 0.70-0.93, p PISA or 2D-VM (60.0 and 62.8 mL, respectively). Automated quantification of MR with 3D-FVCD is feasible and accurate. It is a promising tool for the real-time 3D echocardiographic assessment of patients with MR.

  18. Diagnostic value of color doppler ultrasonography in detecting stenosis and occlusion of central veins in patients with chronic kidney disease.

    Science.gov (United States)

    Rad, Masoud Pezeshki; Kazemzadeh, Gholam Hosain; Ziaee, Masood; Azarkar, Ghodsieh

    2015-03-01

    Venography is an invasive diagnostic test that uses contrast material that provides a picture of the condition of the veins. But, complications, including adverse effects on the kidney, do occur. On the other hand, with the current technological development, application of ultrasound in the diagnosis of obstructive diseases of the veins is gaining popularity, being non-invasive, easy to perform and cost-effective. The aim of this study was to evaluate the diagnostic value of Doppler sonography in the diagnosis of central vein stenosis. In this descriptive-analytical study, 41 hemodialysis patients who had been referred for 50 upper limb venographies to the radiology department of Imam Reza (AS) were included. Patients with chronic kidney disease with a history of catheterization of the vein, jugular or subclavian, and who had established fistulas or synthetic vascular grafts were targeted. Central venous ultrasound was performed on both sides to evaluate stenosis or occlusion. Venography was performed by the radiologist the next day or the day before hemodialysis. Data on demographic characteristics, findings of clinical examination and findings of ultrasound as well as venography were recorded by using the SPSS software, Chi-square test and Spearman correlation, and Kappa agreement was calculated for sensitivity, specificity and predictive values. Twenty-three (56%) patients were male subjects and 18 patients (44%) were female. Twenty-three (56%) patients of the study population were aged 60 years. The overall sensitivity, specificity and positive predictive value and negative predictive value of Doppler sonography in the proximal veins in hemodialysis patients compared with venography were, respectively, 80.9%, 79.3%, 73.9% and 85.1%. Color Doppler sonography, as a non-invasive method, could be a good alternative for venography in the assessment of the upper limb with central vein stenosis and occlusion.

  19. Diagnostic value of color doppler ultrasonography in detecting stenosis and occlusion of central veins in patients with chronic kidney disease

    Directory of Open Access Journals (Sweden)

    Masoud Pezeshki Rad

    2015-01-01

    Full Text Available Venography is an invasive diagnostic test that uses contrast material that provides a picture of the condition of the veins. But, complications, including adverse effects on the kidney, do occur. On the other hand, with the current technological development, application of ultrasound in the diagnosis of obstructive diseases of the veins is gaining popularity, being non-invasive, easy to perform and cost-effective. The aim of this study was to evaluate the diagnostic value of Doppler sonography in the diagnosis of central vein stenosis. In this descriptive-analytical study, 41 hemodialysis patients who had been referred for 50 upper limb venographies to the radiology department of Imam Reza (AS were included. Patients with chronic kidney disease with a history of catheterization of the vein, jugular or subclavian, and who had established fistulas or synthetic vascular grafts were targeted. Central venous ultrasound was performed on both sides to evaluate stenosis or occlusion. Venography was performed by the radiologist the next day or the day before hemodialysis. Data on demographic characteristics, findings of clinical examination and findings of ultrasound as well as venography were recorded by using the SPSS software, Chi-square test and Spearman correlation, and Kappa agreement was calculated for sensitivity, specificity and predictive values. Twenty-three (56% patients were male subjects and 18 patients (44% were female. Twenty-three (56% patients of the study population were aged 60 years. The overall sensitivity, specificity and positive predictive value and negative predictive value of Doppler sonography in the proximal veins in hemodialysis patients compared with venography were, respectively, 80.9%, 79.3%, 73.9% and 85.1%. Color Doppler sonography, as a non-invasive method, could be a good alternative for venography in the assessment of the upper limb with central vein stenosis and occlusion.

  20. The effect of bariatric surgery on the retrobulbar flow hemodynamic parameters in patients with obesity: color Doppler evaluation.

    Science.gov (United States)

    Çekiç, Bülent; Doğan, Berna; Toslak, Iclal Erdem; Doğan, Uğur; Sağlık, Semih; Erol, Muhammed Kazım

    2017-07-31

    To evaluate the effect of weight loss on the retrobulbar hemodynamics in patients who had undergone bariatric surgery for obesity using color Doppler ultrasound (CDU) and to evaluate correlations with intraocular pressure (IOP) changes measured using Goldman applanation tonometry. Thirty-two patients were included in this prospective study. Body mass index (BMI), IOP measurements, and retrobulbar CDU examination were performed on all individuals 6 months before and after bariatric surgery. The preoperative mean BMI value was 48.8 ± 2.27 kg/m2, and mean IOP value was 18.2 ± 2.06 mmHg. At 6 months postoperatively, mean BMI and IOP were 36.28 ± 5.41 kg/m2 and 16.1 ± 1.81 mmHg which was statistically significantly lower than the preoperative measurements (p Doppler parameters (PSV, EDV) than in the preoperative period, which reflects a better retrobulbar and ocular blood flow.

  1. Use of color Doppler ultrasonography for the prediction of malignancy in follicular thyroid neoplasms: systematic review and meta-analysis.

    Science.gov (United States)

    Iared, Wagner; Shigueoka, David Carlos; Cristófoli, Júlio Cesar; Andriolo, Regis; Atallah, Alvaro Nagib; Ajzen, Sérgio Aron; Valente, Orsine

    2010-03-01

    The purpose of this systematic review was to obtain summary estimates of the diagnostic accuracy of color Doppler ultrasonography (CDU) in predicting malignancy in thyroid follicular neoplasms (FNs). We searched Medical Subject Headings together with the search terms "follicular," "thyroid," and "Doppler" in the MEDLINE, Web of Science, and Excerpta Medica databases as well as the Latin American and Caribbean Health Sciences Literature database, after which we performed manual searches of the reference lists to locate additional studies. There were no language restrictions. We included studies that assessed the diagnostic accuracy of CDU in identifying malignancy in thyroid FNs. The assessments of the quality and extraction of data were performed by 3 independent reviewers. We included 4 studies, which collectively evaluated 457 thyroid FNs, 67 of which had been classified as malignant based on the evaluation of surgical biopsy samples. Moderate, rich, predominant, or exclusive internal flow on CDU of thyroid FNs was considered indicative of malignancy. The overall sensitivity of CDU was 85% (95% confidence interval [CI], 74%-93%), with an overall specificity of 86% (95% CI, 82%-89%). The overall prevalence was 14.7%, and the positive and negative predictive values were 51% and 97%, respectively. The positive likelihood ratio was 6.07, and the negative likelihood ratio was 0.18. Predominant internal flow seen on CDU is associated with malignancy of thyroid FNs. Absence of internal flow or predominantly peripheral flow indicates a low probability of thyroid FN malignancy.

  2. Determination of testicular blood flow in camelids using vascular casting and color pulsed-wave Doppler ultrasonography.

    Science.gov (United States)

    Kutzler, Michelle; Tyson, Reid; Grimes, Monica; Timm, Karen

    2011-01-01

    We describe the vasculature of the camelid testis using plastic casting. We also use color pulsed-wave Doppler ultrasonography to measure testicular blood flow and compare the differences between testicular blood flow in fertile and infertile camelids. The testicular artery originates from the ventral surface of the aorta, gives rise to an epididymal branch, and becomes very tortuous as it approaches the testis. Within the supratesticular arteries, peak systolic velocity (PSV) was higher in fertile males compared to infertile males (P = 0.0004). In addition, end diastolic velocity (EDV) within the supratesticular arteries was higher for fertile males when compared to infertile males (P = 0.0325). Within the marginal arteries, PSV was also higher in fertile males compared to infertile males (P = 0.0104). However, EDV within the marginal arteries was not significantly different between fertile and infertile males (P = 0.121). In addition, the resistance index was not significantly different between fertile and infertile males within the supratesticular (P = 0.486) and marginal arteries (P = 0.144). The significance of this research is that in addition to information obtained from a complete reproductive evaluation, a male camelid's fertility can be determined using testicular blood flow measured by Doppler ultrasonography.

  3. Determination of Testicular Blood Flow in Camelids Using Vascular Casting and Color Pulsed-Wave Doppler Ultrasonography

    Directory of Open Access Journals (Sweden)

    Michelle Kutzler

    2011-01-01

    Full Text Available We describe the vasculature of the camelid testis using plastic casting. We also use color pulsed-wave Doppler ultrasonography to measure testicular blood flow and compare the differences between testicular blood flow in fertile and infertile camelids. The testicular artery originates from the ventral surface of the aorta, gives rise to an epididymal branch, and becomes very tortuous as it approaches the testis. Within the supratesticular arteries, peak systolic velocity (PSV was higher in fertile males compared to infertile males (P=0.0004. In addition, end diastolic velocity (EDV within the supratesticular arteries was higher for fertile males when compared to infertile males (P=0.0325. Within the marginal arteries, PSV was also higher in fertile males compared to infertile males (P=0.0104. However, EDV within the marginal arteries was not significantly different between fertile and infertile males (P=0.121. In addition, the resistance index was not significantly different between fertile and infertile males within the supratesticular (P=0.486 and marginal arteries (P=0.144. The significance of this research is that in addition to information obtained from a complete reproductive evaluation, a male camelid's fertility can be determined using testicular blood flow measured by Doppler ultrasonography.

  4. Proximal flow convergence method by three-dimensional color Doppler echocardiography for mitral valve area assessment in rheumatic mitral stenosis.

    Science.gov (United States)

    de Agustin, Jose Alberto; Mejia, Hernan; Viliani, Dafne; Marcos-Alberca, Pedro; Gomez de Diego, Jose Juan; Nuñez-Gil, Ivan Javier; Almeria, Carlos; Rodrigo, Jose Luis; Luaces, Maria; Garcia-Fernandez, Miguel Angel; Macaya, Carlos; Perez de Isla, Leopoldo

    2014-08-01

    The two-dimensional (2D) proximal isovelocity surface area (PISA) method has important technical limitations for mitral valve orifice area (MVA) assessment in mitral stenosis (MS), mainly the geometric assumptions of PISA shape and the requirement of an angle correction factor. Single-beat real-time three-dimensional (3D) color Doppler imaging allows the direct measurement of PISA without geometric assumptions or the requirement of an angle correction factor. The aim of this study was to validate this method in patients with rheumatic MS. Sixty-three consecutive patients with rheumatic MS were included. MVA was assessed using the transthoracic 2D and 3D PISA methods. Planimetry of MVA (2D and 3D) and the pressure half-time method were used as reference methods. The 3D PISA method had better correlations with the reference methods (with 2D planimetry, r = 0.85, P PISA method (with 2D planimetry, r = 0.63, P PISA method was observed. A high percentage (30%) of patients with nonsevere MS by 3D planimetry were misclassified by the 2D PISA method as having severe MS (effective regurgitant orifice area PISA method had 94% agreement with 3D planimetry. Good intra- and interobserver agreement for 3D PISA measurements were observed, with intraclass correlation coefficients of 0.95 and 0.90, respectively. MVA assessment using PISA by single-beat real-time 3D color Doppler echocardiography is feasible in the clinical setting and more accurate than the conventional 2D PISA method. Copyright © 2014 American Society of Echocardiography. Published by Mosby, Inc. All rights reserved.

  5. Variation of safety indices during in the learning curve for color Doppler assessment of the fetal heart at 11+0 to 13+6 weeks' gestation.

    Science.gov (United States)

    Nemescu, Dragos; Berescu, Anca; Rotariu, Cristian

    2015-12-01

    The aim of our study was to analyze the variation of acoustic output, as expressed by the thermal (TI) and mechanical index (MI), during the learning curve for a fetal heart scan at 11-13 gestational weeks, with the introduction of a new ultrasound system. This was a prospective, observational study on 303 normal fetuses. The fetal heart was examined transabdominally using B-Mode and high definition (HD) color Doppler to obtain standard parameters: four-chamber, outflow tracts and three-vessel-trachea views. Data were analyzed in groups of 20 consecutive examinations and the percentage of successful examinations was calculated. TI and MI were retrieved from HD color Doppler examinations of the fetal heart and from pulsed-wave Doppler assessment of the tricuspid flow and ductus venosus. MI values from the color Doppler examination of the fetal heart showed a continuous decrease (0.81 to 0.75, plearning phase. TI and MI indices from pulsed-wave Doppler evaluation of the tricuspid flow increased at the beginning of the learning phase and stabilized afterwards (0.34 to 0.36, pcolor Doppler exam of the heart and indices from ductus venosus assessment were very constant and did not change along the studied periods. The length of Doppler examination of the heart increased after about 80 cases by 25%, to a mean of 4 minutes (plearning curve for fetal heart assessment. Also, the occurrence of constant values suggests the potential for their supplementary active reduction. For a better adaptation to a new ultrasound technology, the sonographer should scan the fetal heart longer in the first trimester and follow displayed safety indices along the first 80 cases.

  6. Diagnosis of Pentalogy of Cantrell in the First Trimester Using Transvaginal Sonography and Color Doppler

    Directory of Open Access Journals (Sweden)

    Ayşe Figen Türkçapar

    2015-01-01

    Full Text Available We report the prenatal diagnosis of Cantrell syndrome in the first trimester. During a routine transabdominal ultrasonographic examination, a midline supraumbilical abdominal wall defect including herniated liver and ectopia cordis with a large omphalocele containing the intestines and cystic hygroma was incidentally identified at the 12th week of gestation. A transvaginal sonography examination revealed a severe lumbosacral scoliosis in addition to the inability to visualize the abdominal aorta which was indicative of a severe intracardiac defect. The parents opted for pregnancy to be terminated. In this case report, we discuss the complementary role of transvaginal sonography and Doppler imaging in the diagnosis of Cantrell syndrome in early pregnancy.

  7. [ECHOCARDIOGRAPHIC PREDICTORS OF THE SEVERITY OF THE EARLY POSTOPERATIVE PERIOD IN PATIENTS AFTER SURGICAL MYOCARDIAL REVASCULARIZATION].

    Science.gov (United States)

    Bockeria, L A; Sokolskaya, N O; Kopylova, N S; Alshibaya, M M

    2015-01-01

    Non-invasive and easily interpretable methods for assessing cardiac hemodynainic parameters including various echocardiographic technologies are highly valuable diagnostic methods in cardiac surgery patients admitting the intensive care unit in the postoperative period. The article presents echocardiographic features of the myocardial functional state in the early period after coronary artery bypass grafting performed in 201 CHD patients. The analysis includes standard echocardiographic parameters and data obtained from tissue Doppler imaging. Tissue Doppler imaging has shown to be informative for diagnosing heart failure. Low left ventricular volumes and restrictive type myocardial diastolic dysfunction have proven to be early echocardiographic predictors of poor prognosis in CAD patients after myocardial revascularization.

  8. Congenital arterioportal fistulas: radiological treatment and color Doppler US follow-up

    Energy Technology Data Exchange (ETDEWEB)

    Teplisky, Dario; Tincani, Eliana Uruena; Lipsich, Jose; Sierre, Sergio [Department of Interventional Radiology, Pichincha 1890, Buenos Aires (Argentina)

    2012-11-15

    Congenital intrahepatic arterioportal fistulas (APFs) are a rare cause of portal hypertension in children. Doppler US is a useful diagnostic imaging modality. Transarterial embolization is a minimally invasive and effective therapy allowing occlusion of the fistula and restoration of liver hemodynamics. To describe the clinical and radiologic findings, percutaneous treatment and role of D-US in the postembolization follow-up of children with APF. Between 2002 and 2011, four children with APF were treated. Initial diagnosis and follow-up was performed with D-US and confirmed by arteriography, followed by endovascular embolization in all patients. D-US demonstrated abnormal arterioportal communications in all patients. Six endovascular procedures were performed in these four children. In two children, no residual fistula was seen on D-US after the first procedure and symptoms resolved. In the other two children, D-US demonstrated residual flow through the fistula, with resolution of pathological D-US findings and symptoms after the second endovascular procedure. All four children were successfully treated and asymptomatic at the end of follow-up. The mean follow-up was 24 months. Interventional radiology has a key role in the treatment of congenital APF. D-US is a noninvasive and effective tool for the diagnosis and follow-up of these patients. (orig.)

  9. Congenital arterioportal fistulas: radiological treatment and color Doppler US follow-up.

    Science.gov (United States)

    Teplisky, Darío; Tincani, Eliana Urueña; Lipsich, José; Sierre, Sergio

    2012-11-01

    Congenital intrahepatic arterioportal fistulas (APFs) are a rare cause of portal hypertension in children. Doppler US is a useful diagnostic imaging modality. Transarterial embolization is a minimally invasive and effective therapy allowing occlusion of the fistula and restoration of liver hemodynamics. To describe the clinical and radiologic findings, percutaneous treatment and role of D-US in the postembolization follow-up of children with APF. Between 2002 and 2011, four children with APF were treated. Initial diagnosis and follow-up was performed with D-US and confirmed by arteriography, followed by endovascular embolization in all patients. D-US demonstrated abnormal arterioportal communications in all patients. Six endovascular procedures were performed in these four children. In two children, no residual fistula was seen on D-US after the first procedure and symptoms resolved. In the other two children, D-US demonstrated residual flow through the fistula, with resolution of pathological D-US findings and symptoms after the second endovascular procedure. All four children were successfully treated and asymptomatic at the end of follow-up. The mean follow-up was 24 months. Interventional radiology has a key role in the treatment of congenital APF. D-US is a noninvasive and effective tool for the diagnosis and follow-up of these patients.

  10. Echocardiographic evaluation during weaning from mechanical ventilation

    Directory of Open Access Journals (Sweden)

    Luciele Medianeira Schifelbain

    2011-01-01

    Full Text Available INTRODUCTION: Echocardiographic, electrocardiographic and other cardiorespiratory variables can change during weaning from mechanical ventilation. OBJECTIVES: To analyze changes in cardiac function, using Doppler echocardiogram, in critical patients during weaning from mechanical ventilation, using two different weaning methods: pressure support ventilation and T-tube; and comparing patient subgroups: success vs. failure in weaning. METHODS: Randomized crossover clinical trial including patients under mechanical ventilation for more than 48 h and considered ready for weaning. Cardiorespiratory variables, oxygenation, electrocardiogram and Doppler echocardiogram findings were analyzed at baseline and after 30 min in pressure support ventilation and T-tube. Pressure support ventilation vs. T-tube and weaning success vs. failure were compared using ANOVA and Student's t-test. The level of significance was p<0.05. RESULTS: Twenty-four adult patients were evaluated. Seven patients failed at the first weaning attempt. No echocardiographic or electrocardiographic differences were observed between pressure support ventilation and T-tube. Weaning failure patients presented increases in left atrium, intraventricular septum thickness, posterior wall thickness and diameter of left ventricle and shorter isovolumetric relaxation time. Successfully weaned patients had higher levels of oxygenation. CONCLUSION: No differences were observed between Doppler echocardiographic variables and electrocardiographic and other cardiorespiratory variables during pressure support ventilation and T-tube. However cardiac structures were smaller, isovolumetric relaxation time was larger, and oxygenation level was greater in successfully weaned patients

  11. Correlations between contrast enhanced color Doppler US and neoangiogenesis in small prostate carcinomas; Correlazioni tra color Doppler con uso di mezzo di contrasto e neoangiogenesi dei piccoli carcinomi prostatici

    Energy Technology Data Exchange (ETDEWEB)

    Lagalla, R.; Caruso, G.; Caruso, R.; Bizzini, G. [Policlinico Universitario P. Giaccone, Palermo (Italy). Ist. di Radiologia; Marasa' , L. [Ospedale Oncologico M. Ascoli, Palermo (Italy). Servizio di Anatomia Patologica; Miceli, V. [Policlinico Universitario P. Giaccone, Palermo (Italy). Ist. di Clinica Urologica

    2000-04-01

    Aim of the work was to investigate if the use of a contrast agent (Levovist) improves the specificity of ultrasonography in the diagnosis of prostate carcinoma, having the results of prostate biopsy as the gold standard. The results have been compared with the microscopic angiogenesis grading system (MAGS) index; they exceed 30 in 11 avascular lesions value indicates microangiogenesis. In the other two cases a minor value of 30 was correlated with a different type of tumor vascularisation typical of macroangiogenesis. [Italian] Scopo del lavoro e' verificare se l'impiego del mezzo di contrasto Levovist (Schering, Berlino) consente di migliorare la specificta' dell'esame ecografico nella diagnosi del carcinoma prostatico, avendo come riferimento i risultati della biopsia prostatica. Trenta pazienti con esame obiettivo sospetto per carcinoma prostatico e antigene prostatico specifico (PSA) compreso tra 5 e 15 ng/ml, sono stati studiati con ecografia transrettale integrata da esame color Doppler e somministrazione di mdc. I risultati ottenuti sono stati confrontati con l'indice Microscopic Angiogenesis Grading System (MAGS) che nelle sezioni istologiche degli 11 casi con aspetto avascolare e' stato superato a 30, espressione di microgenesi; negli altri due casi, il valore inferiore a 30 e' conciso con un differente modello di vascolarizzazione neoplastica proprio della microangiogenesi.

  12. Primary chronic venous insufficiency of the lower extremities: preoperative color duplex Doppler ultrasound study; Insuficiencia venosa cronica primaria de los miembros inferiores. Valoracion prequirurgica con ecografia Doppler duplex color

    Energy Technology Data Exchange (ETDEWEB)

    Selfa, S.; Diago, T.; Ricart, M.; Chulia, R.; Martin, F. [Hospital Lluis Xativa. Valencia (Spain)

    2000-07-01

    To asses the role of color duplex Doppler ultrasound (CDU) in the preoperative study of patients with varicose veins in lower extremities. We employed CDU to examine varicose veins in 342 lower limbs, assessing reflux in saphenous veins (SV), deep venous system (DVS) and perforating veins (PV). We analyzed the relationship between the anatomical extent of the reflux and the clinical findings. Insufficiency of the superficial venous system alone was uncommon, occurring in only 10.8% of the limbs examined. Reflux was observed in SV and PV in 48.2% of the legs. It was detected in all three systems in 29.2% of cases. The presence of reflux in more than one system and more than one value was associated with increased clinical severity. The site of venous reflux in lower extremities with varicose veins varies. Greater clinical severity is observed in the presence of more marked reflux in the DVS and PV. CDU provides anatomic and functional data on the three venous systems of the lower limbs, allowing an individualized therapeutic surgery. Preoperative localization of incompetent PV by means of CDU facilities their ligation. CDU is the technique of choice for the preoperative examination of the venous systems of patients with varicose veins. (Author)

  13. Transvaginal color Doppler imaging of uterine contractions in early pregnancies: Significance of uterine contractions in early pregnancy failure

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Eun Ju; Han, Chang Jin; Suh, Jung Ho; Kwon, Hyuck Chan [Aju University SChool of Medicine, Suwon (Korea, Republic of)

    1999-06-15

    To assess uterine contractions in early pregnancies using transvaginal color Doppler sonography (TVCDS) and to determine the role of uterine contractions in the diagnosis of early pregnancy failure. 76 patients with abnormal pregnancy diagnosed by sonography or histopathology up to 10 weeks of gestation and 38 normal pregnant women as the control group were examines with TVCDS. The presence of uterine contractions was determined by complete or partial disappearance of the color flow signals of vessels within myometrium, and the direction, amplitude (grade 1-3), and interval of uterine contractions were also evaluated. Uterine contractions were identified in 42 (55.3%) of 76 patients with abnormal pregnancy, whereas they were detected only in 2 (5.3%) of 38 normal pregnant women who had initial grade 1 contraction but disappeared in the follow-up study. In 26 patients with blighted ovum or missed abortion, 15 patients (57.7%),showed uterine contraction of grade 1 in 3 cases, grade 2 in 8 cases, and grade 3 in 4 cases and interval from 45 seconds to 5 minutes. In 30 patients with inevitable or incomplete abortion, 23 patients (76.6%) showed uterine contraction of grade 1 in 2 cases, grade 2 in 9 cases, and grade 3 in 12 cases and interval from 1 to 5 minutes. 4 (20%) of 20 patients with threatened abortion had uterine contraction of grade 2 and interval from 2 to 4 minutes. The presence of uterine contractions was significantly different in abnormal pregnancies compared with that of normal and also among the tree different groups of abnormal pregnancies, but the amplitude did not differ.

  14. Combination of shear-wave elastography and color Doppler: Feasible method to avoid unnecessary breast excision of fibroepithelial lesions diagnosed by core needle biopsy.

    Directory of Open Access Journals (Sweden)

    Ga Ram Kim

    Full Text Available We evaluated shear-wave elastography (SWE and color Doppler ultrasonography (US features for fibroepithelial lesions (FELs, and to evaluate their utility to differentiate fibroadenomas (FAs and phyllodes tumors (PTs.This retrospective study included 67 FELs pathologically confirmed (49 FAs, 18 PTs. B-mode US, SWE and color Doppler US were performed for each lesion. Mean elasticity (Emean, maximum elasticity (Emax, and vascularity were determined by SWE and Doppler US. Diagnostic performances were calculated to differentiate FAs and PTs. Equivocal FELs diagnosed by core needle biopsy (CNB were further analyzed.Median Emean and Emax were significantly lower for FAs than PTs (Emean, 15.7 vs. 66.7 kPa; Emax, 21.0 vs. 76.7 kPa, P43.9 kPa, 89.8%; Emax >46.1 kPa, 79.6% than B-mode US (42.9% (P0.05. The combination of SWE and Doppler US with 'Emean>43.9 kPa or high vascularity (≥2 vessel flows' showed a higher area under the curve (0.786 vs. 0.687 and higher diagnostic values than B-mode US (sensitivity, 100 vs. 94.4%; specificity, 57.1 vs. 42.9%; positive predictive value, 46.2 vs. 37.8%; negative predictive value, 100 vs. 95.5%, without statistical significance (P>0.05. Of the 30 equivocal FELs, all lesions with 'Emean≤43.9 kPa and low vascularity (0-1 vessel flow' (23.3%, 7/30 were finally confirmed as FAs by excision.FAs have a tendency to have less stiffness and lower vascularity than PTs. Combined SWE and color Doppler US may help patients with equivocal FELs diagnosed by CNB avoid unnecessary excision.

  15. Emergency color Doppler sonography of the extremity artery: A pictorial essay.

    Science.gov (United States)

    Mennitt, Kevin; Deol, Madhvi; Gao, Jing

    Arterial color duplex sonography (CDUS) of the extremities is routinely analyzed in the field of emergency radiology. A retrospective review of 500 consecutive arterial CDUS extremity studies was performed in our emergency department. Abnormal CDUS examinations were classified into two groups according to their primary etiology: 1) traumatic arterial injuries (accidents or post-operative complications) and 2) acute arterial ischemia (thrombosis or embolism outside of the setting of acute trauma). This article reviews common CDUS imaging findings in a busy emergency radiology division including traumatic pseudoaneurysm, secondary pseudoaneurysm, arteriovenous fistula, acute ischemic arterial disease and chronic peripheral arterial disease. This essay highlights the crucial role of CDUS in the diagnosis of vascular abnormalities in the emergency setting. CDUS provides several advantages over other imaging modalities including high accuracy, rapid results, portability, lack of radiation, and low cost. Copyright © 2017 Elsevier Inc. All rights reserved.

  16. Geometry of the proximal isovelocity surface area in mitral regurgitation by 3-dimensional color Doppler echocardiography: difference between functional mitral regurgitation and prolapse regurgitation.

    Science.gov (United States)

    Matsumura, Yoshiki; Fukuda, Shota; Tran, Hung; Greenberg, Neil L; Agler, Deborah A; Wada, Nozomi; Toyono, Manatomo; Thomas, James D; Shiota, Takahiro

    2008-02-01

    The geometry of the proximal isovelocity surface area (PISA) of functional mitral regurgitation (MR), which is conventionally assumed to be a hemisphere, remains to be clarified. We investigated the 3-dimensional (3D) geometry of PISA of functional MR as opposed to that of MR due to mitral valve prolapse (MVP) by real-time 3D echocardiography with color Doppler capability. Twenty-seven patients with functional MR and 27 patients with MVP were examined. The horizontal PISA length in the commissure-commissure plane and each PISA radius in 3 anteroposterior planes (medial, central, and lateral) were measured by real-time 3D echocardiography with 3D software. The effective regurgitant orifice (ERO) area was calculated with the maximum PISA radius and compared to that by 2D quantitative Doppler method. En-face 3D color Doppler images showed an elongated and slightly curved PISA geometry along the leaflet coaptation in functional MR, whereas the geometry was rounder in MVP. The PISA horizontal length in functional MR was longer than that in MVP (2.3 +/- 0.4 vs 1.2 +/- 0.2 cm, P PISA method with the maximum radius underestimated the ERO area by 2D quantitative Doppler method (by 24%) in functional MR, but not in MVP. The geometry of PISA in functional MR was elongated, distinctly different from the more focal pathology of MVP, leading to underestimation of the ERO area by PISA method.

  17. SELECTIVE AND NONSELECTIVE β-BLOCKERS IN PRIMARY OPEN ANGLE GLAUCOMA THERAPY – RESULTS OF COLOR DOPPLER SONOGRAPHY

    Directory of Open Access Journals (Sweden)

    Vukoslava Maričić-Došen

    2002-12-01

    Full Text Available Background. Primary open angle glaucoma (POAG is a syndrome of progressive optic neuropathy characterized by optic nerve head excavation and visual field defects. Poor correlation between IOP and progression of glaucoma disease sets vascular mechanism in the centre of attention. By Color Doppler sonography, quantification of blood flow changes in vessels, which supply optic nerve head, is possible. We wanted to find out whether there are changes in the circulation of central retinal artery and posterior ciliary arteries in patients with primary open angle glaucoma treated with selective or nonselective β -blockers.Methods. 44 patients (88 eyes were divided into two groups: group 1: 22 patients (44 eyes treated with selective β -blockers (Betaxolol 0.5% and group 2: 22 patients (44 eyes treated with nonselective β -blockers (Timolol 0.5%. Vascular indices (RI, PI were measured in the central retinal artery and posterior ciliary arteries.Results. We found decreased blood flow and increased vascular indices in both groups of patients, statistically significant difference between group 1 and group 2: blood flow velocity was higher and vascular indices were lower in group 1 (Betaxolol 0.5% compared to group 2 (Timolol 0..5%.Conclusions. Selective β -blockers (calcium channel blockers act more vasoactively and neuroprotectively comparing to nonselective β -blockers.

  18. Color Doppler analysis of uterine, spiral, and intraovarian artery blood flow before and after treatment with cabergoline in hyperprolactinemic patients.

    Science.gov (United States)

    Temizkan, Osman; Temizkan, Sule; Asicioglu, Osman; Aydin, Kadriye; Kucur, Suna

    2015-01-01

    Prolactin (PRL) may have stimulatory effects on vascular resistance. We aimed to analyze uterine, spiral, and intraovarian artery blood flow by Doppler ultrasonography in hyperprolactinemic patients prior to and after treatment with cabergoline. The study was conducted in Sisli Etfal Training and Research Hospital gynecology outpatient clinic between 1 March 2010 and 30 September 2011. Twenty-four women with symptomatic hyperprolactinemia in reproduction age were included in the study. All hyperprolactinemic patients were studied prior to and following the suppression of circulating PRL levels by cabergoline. Patients were examined by standard B-mod and color transvaginal ultrasonography. Pulsality index (PI), resistance index (RI), and systolic/diastolic ratio (S/D) were recorded. The median PRL value was 86 (62-120) ng/ml before treatment and 4.0 (2.5-6.4) ng/ml after the treatment (p cabergoline treatment. In conclusion, this is a pilot study which shows for the first time that PRL increases the uterine, endometrial, and intraovarian vascular resistance and cabergoline reverses this effect.

  19. Association of maternal and umbilical cord blood leptin concentrations and abnormal color Doppler indices of umbilical artery with fetal growth restriction

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    Elahe Zareaan

    2017-08-01

    Full Text Available Background: Fetal growth restriction (FGR is a condition with heterogeneous pathophysiology which characterized by fetal weight less than the tenth percentile for gestational age. Several factors have impact on maternal, placental and fetal due to growth restriction. Objective: The aim of this study was to investigate the relationship between levels of leptin in the cord, and serum leptin of mothers also abnormal color Doppler indices of umbilical artery with fetal growth restriction. Materials and Methods: This is a cross sectional study conducted in Isfahan, Iran, 2015-2016. We recruited 40 women with singleton pregnancies complicated by fetal growth restriction (Group I and 40 pregnant women with normal fetal growth (Group II with matched age. Maternal serum and umbilical artery leptin levels were determined with Enzyme-Linked immunosorben method. Also, color Doppler ultrasound of umbilical artery was performed. Results: Mean maternal and fetal leptin levels were lower in the FGR group compared to the normal group (36.58±(20.99 and 7.42 ±(4.08vs. 47.32±(22.50 and 30.49±(14.50 respectively. Also, mean fetal leptin level was lower in the group with abnormal color Doppler sonographic indices compared to the normal group (7. 40 ±(4.10vs 27.06±(15.80, respectively. Conclusion: This study indicated that maternal and fetal leptin levels are correlated with FGR originating from damaged placental function; also fetal leptin level can indicate changes in color Doppler sonographic indices.

  20. In Vitro Validation of Real-Time Three-Dimensional Color Doppler Echocardiography for Direct Measurement of Proximal Isovelocity Surface Area in Mitral Regurgitation

    OpenAIRE

    Little, Stephen H.; Igo, Stephen R.; Pirat, Bahar; McCulloch, Marti; Hartley, Craig J.; Nosé, Yukihiko; Zoghbi, William A.

    2007-01-01

    The 2-dimensional (2D) color Doppler (2D-CD) proximal isovelocity surface area (PISA) method assumes a hemispheric flow convergence zone to estimate transvalvular flow. Recently developed 3-dimensional (3D)-CD can directly visualize PISA shape and surface area without geometric assumptions. To validate a novel method to directly measure PISA using real-time 3D-CD echocardiography, a circulatory loop with an ultrasound imaging chamber was created to model mitral regurgitation (MR). Thirty-two ...

  1. Echocardiographic findings in infants with presumed congenital Zika syndrome: Retrospective case series study.

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    Danielle Di Cavalcanti

    Full Text Available To report the echocardiographic evaluation of 103 infants with presumed congenital Zika syndrome.An observational retrospective study was performed at Instituto de Medicina Integral Prof. Fernando Figueira (IMIP, Recife, Brazil. 103 infants with presumed congenital Zika syndrome. All infants had microcephaly and head computed tomography findings compatible with congenital Zika syndrome. Zika IgM antibody was detected in cerebrospinal fluid samples of 23 infants. In 80 infants, the test was not performed because it was not available at that time. All infants had negative serology for HIV, syphilis, rubella, cytomegalovirus and toxoplasmosis. A complete transthoracic two-dimensional, M-mode, continuous wave and pulsed wave Doppler and color Doppler echocardiographic (PHILIPS HD11XE or HD15 examination was performed on all infants.14/103 (13.5% echocardiograms were compatible with congenital heart disease: 5 with an ostium secundum atrial septal defect, 8 had a hemodynamically insignificant small apical muscular ventricular septal defect and one infant with dyspnea had a large membranous ventricular septal defect. The echocardiograms considered normal included 45 infants with a persistent foramen ovale and 16 with a minimum patent ductus arteriosus.Preliminarily this study suggests that congenital Zika syndrome may be associated with an increase prevalence of congenital heart disease. However the types of defects noted were septal defects, a proportion of which would not be hemodynamically significant.

  2. Role of color Doppler US in the evaluation of uterine leiomyoma treated with gonadotrophin-releasing hormone (GnRH) agonist (Zoladex)

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Jung Sik; Sohn, Cheol Ho; Lee, Tae Sung [Keimyung University Dongsan Medical Center, Taegu (Korea, Republic of)

    1999-03-15

    To access the role of color Doppler US in the evaluation of uterine leiomyoma treated with GnRH agonist (Zoladex). Out of 25 patients with uterine leiomyoma treated with Zoladex, nineteen cases of leiomyoma in 18 women who had US examination before and after medication were included in this study. Zoladex was injected subcutaneously three times within three months. Both gray scale and color Doppler US were obtained before and 1-3 months after the medication. The size, volume, location and internal echoes of the leiomyoma were recorded with gray scale US. Changes in the amount of color signal within leiomyomas were recorded. Pulsatility index (PI), resistive index (RI), peak systolic velocity (PSV) of both uterine artery and arteries within leiomyomas were also recorded. The image findings of good response group and poor response group in which the volume reduction of the leiomyoma was above or below 50% respectively were compared with each other. The reduction of the volume of leiomyoma was compared between a group with decrease in the amount of color signals during follow-up US and a group with increase or no change. Mean reduction of the volume of leiomyomas was 52%. Changes in the amount of color signals of the leiomyoma, PI, RI, PSV obtained from the arteries within leiomyomas were not correlated with the change of the volume of leiomyomas. PSV of uterine artery in one month follow-up and PI of two month follow-up were correlated with the changes of the volume of leiomyomas (p<0.05). RI of uterine artery in two month follow-up was useful in prediction of the good response group and the poor response group (p<0.05). The prediction of the volume reduction of leiomyoma following Zoladex medication might be possible by obtaining RI of uterine artery in two month follow-up. Doppler US of the arteries within the leiomyoma was not useful.

  3. Evaluation of varicocele frequency of patients with spinal cord injury by color Doppler ultrasonography: A new etiological factor for varicocele?

    Energy Technology Data Exchange (ETDEWEB)

    Unsal, Alparslan [Adnan Menderes University, Faculty of Medicine, Department of Radiology, 09100 Aydin (Turkey)]. E-mail: aunsal@adu.edu.tr; Yilmaz, Bilge [Turkish Armed Forces Rehabilitation and Care Center, Department of Physical Medicine and Rehabilitation, Bilkent, Ankara (Turkey); Turgut, Ahmet Tuncay [Ankara Training and Research Hospital, Department of Radiology, Ankara (Turkey); Taskin, Fuesun [Adnan Menderes University, Faculty of Medicine, Department of Radiology, 09100 Aydin (Turkey); Alaca, Ridvan [Turkish Armed Forces Rehabilitation and Care Center, Department of Physical Medicine and Rehabilitation, Bilkent, Ankara (Turkey); Karaman, Can Zafer [Adnan Menderes University, Faculty of Medicine, Department of Radiology, 09100 Aydin (Turkey)

    2006-01-15

    Purpose: To evaluate the varicocele frequency of patients with spinal cord injury by color Doppler ultrasonography. Materials and methods: Sixty patients {l_brace}48 patients with upper motor neuron injury (U-MNI) and 12 patients with lower-MNI{r_brace} with traumatic spinal cord injury and age matched 48 healthy volunteers were enrolled in this prospective study. Testis volumes and varicocele grades were determined. Presence of varicocele was also classified according to clinical significance. Results: Testis volumes of U-MNI sub-group (14.81 {+-} 4.74 ml) were significantly smaller than the control group (18.20 {+-} 4.52 ml, p = 0.000) and L-MNI sub-group (17.88 {+-} 3.23 ml, p = 0.008). No left-sided clinical varicocele was found in L-MNI sub-group (0/12, 0%), whereas there were 14 patients in control group (14/48, 29%) and 7 patients in U-MNI sub-group (7/47, 15%), and the difference was statistically significant (p = 0.000, 0.007, respectively). Conclusion: Clinical varicocele frequency of U-MNI patients, who have spastic paralysis of abdominal and lower extremity muscles, is similar to the control group. This finding inspires that increased intra-abdominal pressure via normal to increased abdominal muscle tonus may have a role in the varicocele etiology, beside the classical factors. Absence of clinical varicocele in L-MNI patients, who have flaccid paralysis of the same muscle groups, supports this observation.

  4. Short-term effects of intravitreal triamcinolone acetonide injection on ocular blood flow evaluated with color Doppler ultrasonography

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    Mustafa Alpaslan Anayol

    2014-10-01

    Full Text Available AIM:To evaluate the changes in ocular blood flow with color Doppler ultrasonography (CDU after intravitreal triamcinolone acetonide (IVTA injection.METHODS: A total of 46 patients who underwent IVTA (4 mg/0.1 mL injection for diabetic macular edema (DME (n=22, central retinal vein occlusion (CRVO (n=12 and choroidal neovascular membrane (CNVM (n=12 were included in the study. Peak systolic velocity (PSV, end diastolic velocity (EDV and resistivity index (RI were measured from the ophthalmic artery (OA, the central retinal artery (CRA and the posterior ciliary artery (PCA of each patient with CDU before, at the end of the first week and at the end of the first month following IVTA injection.RESULTS:In the DME group, PSV of OA at the first of the first month (mean±SD (37.48±10.87 cm/s increased compared to pre-injection value (31.39±10.84 cm/s (P=0.048. There was a statistically significant decrease (P=0.049 in PSV of CRA at the end of the first month (7.97±2.67 cm/s compared to the pre-injection (9.47±3.37 cm/s. There was not any statistically significant difference on the other parameters in the DME group. Also, there was not any statistically significant difference on the ocular blood flow values in the CRVO and CNVM groups.CONCLUSION: We observed that 4 mg/0.1 mL IVTA increased PSV of OA and decreased PSV of CRA in DME patients and did not have any effect on ocular blood flow values of CRVO and CNVM patients.

  5. Value of sagittal color Doppler ultrasonography as a supplementary tool in the differential diagnosis of fetal cleft lip and palate

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    Lee, Myoung Seok [Dept. of Radiology, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul (Korea, Republic of); Cho, Jeong Yeon; Kim, Sang Youn; Kim, Seung Hyup [Dept. of Radiology, Seoul National University Hospital, Seoul (Korea, Republic of); Park, Joong Shin; Jun, Jong Kwan [College of Medicine, Seoul National University, Seoul (Korea, Republic of)

    2017-01-15

    The purpose of this study was to evaluate the feasibility and usefulness of sagittal color Doppler ultrasonography (CDUS) for the diagnosis of fetal cleft lip (CL) and cleft palate (CP). We performed targeted ultrasonography on 25 fetuses with CL and CP, taking coronal and axial images of the upper lip and maxillary alveolar arch in each case. The existence of defects in and malalignment of the alveolus on the axial image, hard palate defects on the midsagittal image, and flow-through defects on CDUS taken during fetal breathing or swallowing were assessed. We compared the ultrasonography findings with postnatal findings in all fetuses. Alveolar defects were detected in 16 out of 17 cases with CP and four out of eight cases with CL. Alveolar malalignment and hard palate defects were detected in 11 out of 17 cases and 14 out of 17 cases with CP, respectively, but not detected in any cases with CL. Communicating flow through the palate defect was detected in 11 out of 17 cases of CL with CP. The accuracy of detection in axial scans of an alveolar defect and malalignment was 80% and 76%, respectively. Accuracy of detection of in mid-sagittal images of hard palate defect and flow was 80% and 86%, respectively. The overall diagnostic accuracy of combined axial and sagittal images with sagittal CDUS was 92%. Sagittal CDUS of the fetal hard palate is a feasible method to directly reveal hard palate bony defects and flow through defects, which may have additional value in the differential diagnosis of fetal CL and CP.

  6. Three-Dimensional Field Optimization Method: Gold-Standard Validation of a Novel Color Doppler Method for Quantifying Mitral Regurgitation.

    Science.gov (United States)

    Pierce, Eric L; Rabbah, Jean Pierre M; Thiele, Karl; Wei, Qifeng; Vidakovic, Brani; Jensen, Morten O; Hung, Judy; Yoganathan, Ajit P

    2016-10-01

    Accurate diagnosis of mitral regurgitation (MR) severity is central to proper treatment. Although numerous approaches exist, an accurate, gold-standard clinical technique remains elusive. The authors previously reported on the initial development and demonstration of the automated three-dimensional (3D) field optimization method (FOM) algorithm, which exploits 3D color Doppler ultrasound imaging and builds on existing MR quantification techniques. The aim of the present study was to extensively validate 3D FOM in terms of accuracy, ease of use, and repeatability. Three-dimensional FOM was applied to five explanted ovine mitral valves in a left heart simulator, which were systematically perturbed to yield a total of 29 unique regurgitant geometries. Three-dimensional FOM was compared with a gold-standard flow probe, as well as the most clinically prevalent MR volume quantification technique, the two-dimensional (2D) proximal isovelocity surface area (PISA) method. Overall, 3D FOM overestimated and 2D PISA underestimated MR volume, but 3D FOM error had smaller magnitude (5.2 ± 9.9 mL) than 2D PISA error (-6.9 ± 7.7 mL). Two-dimensional PISA remained superior in diagnosis for round orifices and especially mild MR, as predicted by ultrasound physics theory. For slit-type orifices and severe MR, 3D FOM showed significant improvement over 2D PISA. Three-dimensional FOM processing was technically simpler and significantly faster than 2D PISA and required fewer ultrasound acquisitions. Three-dimensional FOM did not show significant interuser variability, whereas 2D PISA did. Three-dimensional FOM may provide increased clinical value compared with 2D PISA because of increased accuracy in the case of complex or severe regurgitant orifices as well as its greater repeatability and simpler work flow. Copyright © 2016 American Society of Echocardiography. Published by Elsevier Inc. All rights reserved.

  7. Evaluation the index of ophthalmic arteries in diabetic patients with retinopathy compared to diabetic patients without retinopathy using color Doppler ultrasound

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    Mohammad Ghasem Hanafi

    2016-12-01

    Full Text Available Diabetic retinopathy is the most common eye complication in diabetic patients that early detection of this complication is essential. The aim of this study was to evaluate ophthalmic artery index in diabetic retinopathy by Doppler ultrasound. . In this cross-sectional study, 64 patients were studied in 4 groups (healthy, diabetic without retinopathy, background retinopathy and proliferative retinopathy. Resistance index (RI and Pulsatile Index (PI were assessed by color Doppler ultrasound. The obtained data were analyzed by ANOVA and chi-square test and ROC curve. RI in diabetic patients with proliferative retinopathy has the highest mean (0.83 and the lowest mean was observed in healthy subjects (0.54 (P <0.001 as well as in PI, the highest rate was in diabetic patients with proliferative retinopathy (1.41 and the lowest was in healthy subjects (0.92 (P <0.001. The results of our study showed that the sensitivity, specificity, positive and negative predictive values and overall accuracy of RI and PI in diabetic patients with proliferative retinopathy in the best cut-off points (0.645 and 1.0175 respectively were 100%.Ophthalmic artery index RI and PI was significantly increased in patients with diabetic retinopathy and the sensitivity and specificity for detection retinopathy was 100%. Color Doppler ultrasound method is more efficient for screening diabetic patients with retinopathy.

  8. Automatic extraction of disease-specific features from Doppler images

    Science.gov (United States)

    Negahdar, Mohammadreza; Moradi, Mehdi; Parajuli, Nripesh; Syeda-Mahmood, Tanveer

    2017-03-01

    Flow Doppler imaging is widely used by clinicians to detect diseases of the valves. In particular, continuous wave (CW) Doppler mode scan is routinely done during echocardiography and shows Doppler signal traces over multiple heart cycles. Traditionally, echocardiographers have manually traced such velocity envelopes to extract measurements such as decay time and pressure gradient which are then matched to normal and abnormal values based on clinical guidelines. In this paper, we present a fully automatic approach to deriving these measurements for aortic stenosis retrospectively from echocardiography videos. Comparison of our method with measurements made by echocardiographers shows large agreement as well as identification of new cases missed by echocardiographers.

  9. Color Doppler imaging and measurements of intraovarian and intrauterine vascularization on basal ultrasound examination in spontaneous ovulatory and anovulatory cycles

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    Kutlešić Ranko

    2008-01-01

    Full Text Available Background/Aim. Any organs functioning directly depends on vascularization. It applies also to the uterus and ovary which go through changes of vascularization during a menstruation cycle. The aim of this investigation was to determine differences in intrauterine and ovarian stromal arterioral blood flow on basal ultrasound examination (day 2-4 between spontaneous ovulatory and anovulatory cycles. Methods. This prospective clinical investigation included 205 patients divided into two groups: with ovulatory and with anovulatory cycles. Results. Resistance to ovarian arterioral stromal blood flow was significantly lower in the patients with ovulatory cycles (pulsatile index - PI 0.97 ± 0.4 vs 1.93 ± 1.37; p = 0.001737; and (resistance index - RI 0.55 ± 0.12 vs 0.68 ± 0.14; p = 0.040033. There were no statistically significant differences in arcuate arterioral blood flow in the pateints with ovulatory and anovulatory cycles (PI 1.21 ± 0.34 vs 61 ± 0,61 p = 0.136161 and RI 0.64 ± 0.11 vs 0.74 ± 0.07; p = 0.136649. The patients with ovulatory cycles had lower uterine radial arterioral blood flow than the patients with anovulatory cycles (PI 1.001 ± 0.22 vs 1.61 ± 0.23 p = 0.007501 and RI 0.55 ± 0.08 vs 0.71 ± 0.12; p = 0,0460113. The patients with ovulatory cycles had lower subendometrial arterioral blood flow resistance (PI 0.69 ± 0.19 vs 1.385±0.09; p = 0.00622 and RI 0.44 ± 0.09 vs 0.65 ± 0.02; p = 0.027458. Conclusion. Color Doppler ultrasuond imaging and measurements of intrauterine and ovarian stromal arterioral blood flow on basal ultrasound examination (day 2-4, showed lower resistance to blood flow in ovulatory than in anovulatory cycles.

  10. Relationship between hemodynamic changes of portal vein and hepatic artery measured by color Doppler ultrasound and FibroScan value in patients with liver cirrhosis

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    CHENG Xiaofei

    2014-11-01

    Full Text Available ObjectiveTo explore the relationship between hemodynamic changes of the portal vein and hepatic artery measured by color Doppler ultrasound and FibroScan value in patients with liver cirrhosis. MethodsA total of 192 patients with hepatitis B cirrhosis who were admitted to our hospital from March 2010 to December 2013, as well as 100 healthy persons, were recruited. The mean portal vein blood flow velocity (PVVmean, hepatic artery pulsatility index (HAPI, and hepatic artery resistance index (HARI were measured by color Doppler ultrasound. FibroScan was also carried out. All data were statistically analyzed using SPSS 13.0. Continuous data were expressed as mean±SD and compared between groups by t-test. ResultsThe HAPI, HARI, and FibroScan value of the patient group were 1.56±024, 0.73±0.05, and 25.38±7.73, respectively, significantly higher than those of the control group (1.36±0.14, 0.65±0.07, and 7.8±3.6 (P<0.05; the PVVmean of the patient group was 14.43±1.86, significantly lower than that of the control group (17.35±0.56 (P<0.05. FibroScan value was positively correlated with HAPI and HARI (r1=0.59, r2=0.66, P<0.001, but negatively correlated with PVVmean (r=-0.64, P<0.001. ConclusionThe liver stiffness assessed by FibroScan and the hemodynamic changes of the portal vein and hepatic artery measured by color Doppler ultrasound are vitally important for evaluating the severity of liver cirrhosis.

  11. Transient basilar artery occlusion monitored by transcranial color Doppler presenting with a spectacular shrinking deficit: a case report

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    Del Sette Massimo

    2010-01-01

    Full Text Available Abstract Introduction We describe the case of a 79-year-old Caucasian Italian woman with a transient basilar occlusion monitored by transcranial Doppler, with subsequent recanalization and clinical shrinking deficit. This is the first case of transient basilar occlusive disease diagnosed and monitored by transcranial Doppler. This case is important and needs to be reported because transient basilar occlusion may be easily diagnosed if transcranial Doppler is performed. Case presentation A 79-year-old woman affected by chronic atrial fibrillation and not treated with oral anticoagulants, cardioverted to sinus rhythm during a gastric endoscopy. She then showed a sudden-onset loss of consciousness, horizontal and vertical gaze palsy, tetraparesis and bilateral miosis and coma. Two hours later, the symptoms resolved quickly, leaving no residual neurologic deficits. Transcranial Doppler examination showed a dampened flow in the basilar artery in the emergency examination and a restored flow when the symptoms resolved. Conclusion This is the first case of transient basilar occlusive disease diagnosed and monitored by transcranial Doppler. We believe that transcranial Doppler should be performed in all cases of unexplained acute loss of consciousness, in particular, if associated with signs of brainstem dysfunctions.

  12. Associations between abnormal ultrasound color Doppler measures and tendon pain symptoms in badminton players during a season: a prospective cohort study.

    Science.gov (United States)

    Boesen, Anders Ploug; Boesen, Morten Ilum; Torp-Pedersen, Soren; Christensen, Robin; Boesen, Lars; Hölmich, Per; Nielsen, Michael Bachmann; Koenig, Merete Juhl; Hartkopp, Andreas; Ellegaard, Karen; Bliddal, Henning; Langberg, Henning

    2012-03-01

    Color Doppler ultrasound is widely used to examine intratendinous flow in individuals with overuse tendon problems, but the association between color Doppler and pain is still unclear. Intratendinous flow is present and associated with pain in badminton players, and intratendinous flow and pain increase during a badminton season. Cohort study (prognosis); Level of evidence, 2. Ninety-five semiprofessional badminton players were included in the study at a tournament at the start of the badminton season. All players were interviewed regarding pain. The anterior knee tendons and Achilles tendons were studied. Each tendon was scored using a quantitative grading system (grades 0-5) and a qualitative scoring system (color fraction) using color Doppler ultrasound. Eight months later, 86 of the players (91%) were retested by the same investigators during an equivalent badminton tournament (including 1032 tendon regions; 86 players with 4 tendons each with 3 regions), thus forming the study group. At the start of the season, 24 players (28%) experienced pain in 37 tendons (11%), and at the end of the season, 31 players (36%) experienced pain in 51 tendons (15%), which was a statistically significant increase (P = .0002). Abnormal flow was found in 230 tendon regions in 71 players (83%) at the start of the season compared with 78 tendon regions in 41 players (48%) at the follow-up. The decrease in abnormal flow was statistically significant (P < .0001). Of the 37 painful tendons at the start of the season, 25 had abnormal flow (68%). In contrast, 131 tendons (85%) with abnormal flow at the start of the season were pain free. At the end of the season, 18 of the 51 painful tendons (35%) had abnormal flow. Ninety-six of the 131 pain-free tendons (73%) with abnormal flow at the start of the season were normalized (no pain and normal flow) at the end of the season. It was not possible to verify any association between intratendinous flow and pain at the start of the season or at

  13. Diagnostic value of Doppler echocardiography for identifying hemodynamic significant pulmonary valve regurgitation in tetralogy of Fallot: comparison with cardiac MRI.

    Science.gov (United States)

    Beurskens, Niek E G; Gorter, Thomas M; Pieper, Petronella G; Hoendermis, Elke S; Bartelds, Beatrijs; Ebels, Tjark; Berger, Rolf M F; Willems, Tineke P; van Melle, Joost P

    2017-11-01

    Quantification of pulmonary regurgitation (PR) is essential in the management of patients with repaired tetralogy of Fallot (TOF). We sought to evaluate the accuracy of first-line Doppler echocardiography in comparison with cardiac magnetic resonance imaging (MRI) to identify hemodynamic significant PR. Paired cardiac MRI and echocardiographic studies (n = 97) in patients with repaired TOF were retrospectively analyzed. Pressure half time (PHT) and pulmonary regurgitation index (PRi) were measured using continuous wave Doppler. The ratio of the color flow Doppler regurgitation jet width to pulmonary valve (PV) annulus (jet/annulus ratio) and diastolic to systolic time velocity integral (DSTVI; pulsed wave Doppler) were assessed. Accuracy of echocardiographic measurements was tested to identify significant PR as determined by phase-contrast MRI (PR fraction [PRF] ≥ 20%). Mean PRF was 29.4 ± 15.7%. PHT Doppler echocardiography, especially when combined, are highly accurate in identifying significant PR and therefore seem useful in the follow-up of patients with repaired TOF.

  14. Ratio of left ventricular peak E-wave velocity to flow propagation velocity assessed by color M-mode Doppler echocardiography in first myocardial infarction

    DEFF Research Database (Denmark)

    Møller, J E; Søndergaard, E; Seward, J B

    2000-01-01

    OBJECTIVES: To determine the ability of the ratio of peak E-wave velocity to flow propagation velocity (E/Vp) measured with color M-mode Doppler echocardiography to predict in-hospital heart failure and cardiac mortality in an unselected consecutive population with first myocardial infarction (MI......). BACKGROUND: Several experimental studies indicate color M-mode echocardiography to be a valuable tool in the evaluation of diastolic function, but data regarding the clinical value are lacking. METHODS: Echocardiography was performed within 24 h of arrival at the coronary care unit in 110 consecutive...... compared with patients with E/Vp or =1.5 to be the single best predictor of in-hospital clinical heart failure when compared with age, heart rate, E-wave deceleration time (Dt), left ventricular (LV) ejection fraction, wall...

  15. New echocardiographic techniques in optimal patient selection for cardiac resynchronization therapy in the treatment of chronic heart failure

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    Petrović Milan

    2009-01-01

    Full Text Available Cardiac resynchronization therapy (CRT has important role in the contemporary treatment of heart failure, systolic dysfunction and mechanical disynchrony. Classical indications for CRT are severe heart failure (NYHA class III or IV, a broad QRS (more than 120 ms and left ejection fraction less than 35% despite optimal medical therapy. Several have studies demonstrated the important role of echocardiography in patient selection for CRT, follow up and estimation of CRT effects, as well as the optimization of biventricular pacemaker. Basically, there are three types of cardiac asynchrony: interventricular asynchrony, between the right and left ventricle, intraventricular asynchrony, between the myocardial segments within the left ventricle and atrioventricular asynchrony, between the atria and ventricles. Although many echocardiographic techniques are used in patient selection for CRT, no ideal approach has yet been found. There are several techniques and parameters used in the assessment of myocardial asynchrony: two dimensional (2D echocardiography, one dimensional echocardiography (M-mode, Doppler echocardiography, different modalities of tissue Doppler including Colour Coded Tissue Doppler Imaging - TDI, measurements of local tissue deformation indices (strain and strain rate, speckle tracking, 3D echocardiography, semiquantitative assessment of myocardial border, vector velocity imaging. Each of these techniques has advantages and limitations. A special accent in this revue is on the consensus report from the American Society of Echocardiography Dyssynchrony Writing group. According to this consensus report color coded tissue Doppler is the most appropriate technique for myocardial asynchrony estimation and patients selection for CRT. The same group recommended that definitive decision for CFT implantation should not be based only on echocardiographic analysis, but rather on the whole clinical aspect of the patient.

  16. Rationale and Design of the Echocardiographic Study of Hispanics/Latinos (ECHO-SOL).

    Science.gov (United States)

    Rodriguez, Carlos J; Dharod, Ajay; Allison, Matthew A; Shah, Sanjiv J; Hurwitz, Barry; Bangdiwala, Shrikant I; Gonzalez, Franklyn; Kitzman, Dalane; Gillam, Linda; Spevack, Daniel; Dadhania, Rupal; Langdon, Sarah; Kaplan, Robert

    2015-01-01

    Information regarding the prevalence and determinants of cardiac structure and function (systolic and diastolic) among the various Hispanic background groups in the United States is limited. The Echocardiographic Study of Latinos (ECHO-SOL) ancillary study recruited 1,824 participants through a stratified-sampling process representative of the population-based Hispanic Communities Health Study - Study of Latinos (HCHS-SOL) across four sites (Bronx, NY; Chicago, Ill; San Diego, Calif; Miami, Fla). The HCHS-SOL baseline cohort did not include an echo exam. ECHO-SOL added the echocardiographic assessment of cardiac structure and function to an array of existing HCHS-SOL baseline clinical, psychosocial, and socioeconomic data and provides sufficient statistical power for comparisons among the Hispanic subgroups. Standard two-dimensional (2D) echocardiography protocol, including M-mode, spectral, color and tissue Doppler study was performed. The main objectives were to: 1) characterize cardiac structure and function and its determinants among Hispanics and Hispanic subgroups; and 2) determine the contributions of specific psychosocial factors (acculturation and familismo) to cardiac structure and function among Hispanics. We describe the design, methods and rationale of currently the largest and most comprehensive study of cardiac structure and function exclusively among US Hispanics. ECHO-SOL aims to enhance our understanding of Hispanic cardiovascular health as well as help untangle the relative importance of Hispanic subgroup heterogeneity and sociocultural factors on cardiac structure and function.

  17. Hemodynamic changes on color Doppler flow imaging and intravenous contrast-enhanced ultrasound for assessing transplanted liver and early diagnosis of complications.

    Science.gov (United States)

    Huang, Daozhong; Chen, Yunchao; Li, Kaiyan; Zhang, Qingping

    2008-06-01

    The value of color Doppler flow imaging (CDFI) and intravenous contrast-enhanced ultrasound (CEUS) for assessing the transplanted liver and early diagnosing complications by examining hemodynamic changes was discussed. Seventy-five patients with orthotopic liver transplantation (OLT) underwent CDFI. The following parameters were measured: peak systolic velocity (PS), resistance index (RI) and Doppler perfusion index (DPI) of the hepatic artery (HA), time average velocity (TAV) of portal vein (PV) and velocity of hepatic vein (HV) in different stages postoperation. And 11 patients of them received CEUS. Thirty healthy subjects were enrolled as controls. The results showed that: (1) In 23 patients without obvious complications, TAV of PV within 15 days post-operation was significantly higher than in controls (Pliver transplantation was increased when DPI was reduced; (5) Seven cases of hepatic carcinoma relapse after OLT demonstrated hyperecho in the arterial phase and hypoecho in the portal and later phase on CEUS; (6) In 2 cases of HA thrombus, there was no visualized enhancement in arterial phase of CEUS, but enhancement during the portal vein and parenchymal phase. It was concluded that the hemodynamic changes of PV, HA and HV in the transplanted liver are valuable for assessing the transplanted liver and early diagnosing complications on CDFI and CEUS.

  18. 'Focal thyroid inferno' on color Doppler ultrasonography: A specific feature of focal Hashimoto's thyroiditis

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    Fu, Xianshui, E-mail: fuxs1968@163.com [Department of Ultrasound, Peking University Third Hospital, 49 Huayuanbeilu Road, Beijing 100191 (China); Guo, Limei, E-mail: guolimei@bjmu.edu.cn [Department of Pathology, Peking University Third Hospital, 49 Huayuanbeilu Road, Beijing 100191 (China); Zhang, Huabin, E-mail: huabinzhang@bjmu.edu.cn [Department of Ultrasound, Peking University Third Hospital, 49 Huayuanbeilu Road, Beijing 100191 (China); Ran, Weiqiang, E-mail: ranwq-sina@vip.sina.com [Department of Ultrasound, Peking University Third Hospital, 49 Huayuanbeilu Road, Beijing 100191 (China); Fu, Peng, E-mail: fupeng01@gmail.com [Department of Ultrasound, Peking University Third Hospital, 49 Huayuanbeilu Road, Beijing 100191 (China); Li, Zhiqiang, E-mail: lizhq126@126.com [Department of Ultrasound, Peking University Third Hospital, 49 Huayuanbeilu Road, Beijing 100191 (China); Chen, Wen, E-mail: wendy7989@sina.com [Department of Ultrasound, Peking University Third Hospital, 49 Huayuanbeilu Road, Beijing 100191 (China); Jiang, Ling, E-mail: papayaling@yahoo.com.cn [Department of Ultrasound, Peking University Third Hospital, 49 Huayuanbeilu Road, Beijing 100191 (China); Wang, Jinrui, E-mail: jinrui_wang@sina.com [Department of Ultrasound, Peking University Third Hospital, 49 Huayuanbeilu Road, Beijing 100191 (China); Jia, Jianwen, E-mail: drjia88@sohu.com [Department of Ultrasound, Peking University Third Hospital, 49 Huayuanbeilu Road, Beijing 100191 (China)

    2012-11-15

    Purpose: To evaluate color-Doppler features predictive of focal Hashimoto's thyroiditis. Materials and methods: A total of 521 patients with 561 thyroid nodules that underwent surgeries or gun biopsies were included in this study. These nodules were divided into three groups: focal Hashimoto's thyroiditis (104 nodules in 101 patients), benignity other than focal Hashimoto's thyroiditis (73 nodules in 70 patients), and malignancy (358 nodules in 350 patients). On color Doppler sonography, four vascularity types were determined as: hypovascularity, marked internal flow, marked peripheral flow and focal thyroid inferno. The {chi}{sup 2} test was performed to seek the potential vascularity type with the predictive ability of certain thyroid pathology. Furthermore, the gray-scale features of each nodule were also studied. Results: The vascularity type I (hypovascularity) was more often seen in focal Hashimoto's thyroiditis than other benignity and malignancy (46% vs. 20.5% and 19%). While the type II (marked internal flow) showed the opposite tendency (26.9% [focal Hashimoto's thyroiditis] vs. 45.2% [other benignity] and 52.8% [malignancy]). However, type III (marked peripheral flow) was unable to predict any thyroid pathology. Importantly, type IV (focal thyroid inferno) was exclusive to focal Hashimoto's thyroiditis. All 8 type IV nodules appeared to be solid, hypoechoic, and well-defined. Using 'focal thyroid inferno' as an indicator of FHT, the diagnostic sensitivity and specificity were 7.7% and 100% respectively. Conclusions: The vascularity type of 'focal thyroid inferno' is specific for focal Hashimoto thyroiditis. Recognition of this particular feature may avoid unnecessary interventional procedures for some solid hypoechoic thyroid nodules suspicious of malignancy.

  19. Intraventricular vector flow mapping—a Doppler-based regularized problem with automatic model selection

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    Assi, Kondo Claude; Gay, Etienne; Chnafa, Christophe; Mendez, Simon; Nicoud, Franck; Abascal, Juan F. P. J.; Lantelme, Pierre; Tournoux, François; Garcia, Damien

    2017-09-01

    We propose a regularized least-squares method for reconstructing 2D velocity vector fields within the left ventricular cavity from single-view color Doppler echocardiographic images. Vector flow mapping is formulated as a quadratic optimization problem based on an {{\\ell }2} -norm minimization of a cost function composed of a Doppler data-fidelity term and a regularizer. The latter contains three physically interpretable expressions related to 2D mass conservation, Dirichlet boundary conditions, and smoothness. A finite difference discretization of the continuous problem was adopted in a polar coordinate system, leading to a sparse symmetric positive-definite system. The three regularization parameters were determined automatically by analyzing the L-hypersurface, a generalization of the L-curve. The performance of the proposed method was numerically evaluated using (1) a synthetic flow composed of a mixture of divergence-free and curl-free flow fields and (2) simulated flow data from a patient-specific CFD (computational fluid dynamics) model of a human left heart. The numerical evaluations showed that the vector flow fields reconstructed from the Doppler components were in good agreement with the original velocities, with a relative error less than 20%. It was also demonstrated that a perturbation of the domain contour has little effect on the rebuilt velocity fields. The capability of our intraventricular vector flow mapping (iVFM) algorithm was finally illustrated on in vivo echocardiographic color Doppler data acquired in patients. The vortex that forms during the rapid filling was clearly deciphered. This improved iVFM algorithm is expected to have a significant clinical impact in the assessment of diastolic function.

  20. Efeito da brimonidina na circulação retrobulbar em pacientes com glaucoma: estudo com Doppler colorido Effect of brimonidine on the retrobulbar circulation in glaucomatous patients: a color Doppler study

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    Maria Rosa Bet de Moraes Silva

    2001-08-01

    Full Text Available Objetivo: Avaliar o efeito do tartarato de brimonidina a 0,2% tópico, instilado de 12/12 horas, na circulação retrobulbar em pacientes portadores de glaucoma. Métodos: Foram estudados os 2 olhos de 16 pacientes portadores de glaucoma primário de ângulo aberto e glaucoma crônico de ângulo estreito com iridotomia. Usando o Doppler colorido foram avaliados: velocidade sistólica máxima, velocidade diastólica final e índice de resistência das artéria central da retina, artéria ciliar posterior curta temporal e artéria oftálmica. As avaliações foram feitas antes e depois do uso da brimonidina. Resultados: O tartarato de brimonidina a 0,2% aumentou significativamente a velocidade sistólica máxima (28,24 para 34,23 cm/seg e velocidade diastólica final (6,62 para 8,10 cm/seg no olho direito e reduziu o índice de resistência (0,75 para 0,71 no olho esquerdo da artéria oftálmica. Conclusão: O tartarato de brimonidina 0,2% 2x/dia aumentou significativamente a velocidade sistólica máxima e velocidade diastólica final e reduziu índice de resistência da artéria oftálmica de pacientes glaucomatosos. Este efeito sugere que a brimonidina pode beneficiar pacientes glaucomatosos com insuficiência vascular na cabeça do nervo óptico.Purpose: To evaluate a twice daily 0.2% brimonidine tartrate effect on retrobulbar circulation with color Doppler in glaucomatous patients. Methods: Both eyes of sixteen patients with glaucoma were studied. Using a Color Doppler imaging, peak systolic, end diastolic velocity and resistive index was determined in the ophthalmic artery, central retinal artery and temporal short posterior ciliary artery before and after 0.2% brimonidine treatment. Results: 0.2% brimonidine tartrate significantly improved peak systolic (28.24 to 34.23 cm/seg and end diastolic velocities (6.72 to 8.10 cm/seg in the right eye and decreased resistive index (0.75 to 0.71 in the ophthalmic artery of the left eye. Conclusions: A

  1. Gray-scale and color duplex Doppler ultrasound of hand joints in the evaluation of disease activity and treatment in rheumatoid arthritis.

    Science.gov (United States)

    Ivanac, Gordana; Morović-Vergles, Jadranka; Brkljačić, Boris

    2015-06-01

    To evaluate the role of gray-scale and color duplex-Doppler ultrasound (CDUS) in diagnosis of changes of hand joints and assessment of treatment efficacy in patients with rheumatoid arthritis (RA) by comparing qualitative and quantitative US parameters with clinical and laboratory indicators of disease activity. Ulnocarpal (UC), metacarpophalangeal (MCP), and proximal interphalangeal (PIP) joints in 30 patients with RA were examined by gray-scale and CDUS before and after six months of treatment. Morphologic and quantitative Doppler findings (synovial thickness, effusion quantity, vascularization degree, resistance index, velocities) were compared with clinical indicators of disease progression: disease activity score (DAS 28), Health Assessment Questionnaire (HAQ), rheumatoid factor (RF), erythrocyte sedimentation rate (ESR), and C reactive protein (CRP). Clinical indicators changed significantly after treatment: ESR from 38.1±22.4 mm/h to 27.8±20.9 mm/h (P=0.013), DAS 28 from 5.47±1.56 to 3.87±1.65 (Pjoints we observed a significant change in at least one US parameter, in 6 out of 12 joints we observed a significant change in ≥2 parameters, and in 2 UC joints we observed significant changes in ≥3 parameters. The new finding was that the cut-off values of resistance index of 0.40 at baseline and of 0.55 after the treatment indicated the presence of active disease and the efficacy of treatment, respectively; also it was noticed that PIP joints can be omitted from examination protocol. Gray scale and CDUS are useful in diagnosis of changes in UC and MCP joints of patients with RA and in monitoring the treatment efficacy.

  2. Predictive value of various Doppler-derived parameters of atrial conduction time for successful atrial fibrillation ablation.

    Science.gov (United States)

    Shanks, Miriam; Valtuille, Lucas; Choy, Jonathan B; Becher, Harald

    2015-12-01

    Various Doppler-derived parameters of left atrial electrical remodeling have been demonstrated to predict recurrence of atrial fibrillation (AF) after AF ablation. The aim of this study was to compare three Doppler-derived measures of atrial conduction time in patients undergoing AF ablation, and to investigate their predictive value for successful procedure. In 32 prospectively enrolled patients undergoing the first AF ablation, atrial conduction time was estimated by measuring the time delay between the onset of P-wave on the surface ECG to the peak of the a'-wave on the pulsed-wave Doppler and color-coded tissue Doppler imaging of the left atrial lateral wall, and to the peak of the A-wave on the pulsed-wave Doppler of the mitral inflow. There was a significant difference in the baseline atrial conduction time measured by different echocardiographic techniques. Most (88%) patients had normal or only mildly dilated left atrium. At 6 months, 12 patients (38%) had recurrent AF/atrial tachycardia. The duration of history of AF was the only predictor of AF/atrial tachycardia recurrence following the first AF ablation (P=0.024; OR 1.023, CI 1.003-1.044). A combination of normal left atrial volume and history of paroxysmal AF of ≤48 months was associated with the best outcome. Predictive value of the Doppler derived parameters of atrial conduction time may be reduced in the early stages of left atrial remodeling. Future studies may determine which echocardiographic parameter correlates best with the extent of left atrial remodeling and is most predictive of successful AF ablation.

  3. Estudo do jato urinário intravesical com Doppler colorido em pacientes com e sem refluxo vesicoureteral Study of the ureterovesical jet by means of color Doppler in patients with and without vesicoureteral reflux

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    Makoto Sakate

    2006-12-01

    Full Text Available OBJETIVO: O presente estudo teve como objetivo comparar os achados da uretrocistografia miccional com o ultra-som Doppler duplex colorido, em pacientes com suspeita de refluxo vesicoureteral. MATERIAIS E MÉTODOS: A pesquisa foi realizada através do estudo dos ângulos dos jatos urinários intravesicais, nos planos axial e longitudinal. Foi analisada, também, a distância (em centímetros entre os meatos ureterais. RESULTADOS: Do total de 32 pacientes estudados (com média de idade de 5 anos e 2 meses, 18 pacientes apresentaram refluxo vesicoureteral (10 com refluxo unilateral, sendo 4 no lado direito e 6 no lado esquerdo, e 8 com refluxo bilateral e 14 pacientes não apresentaram refluxo. Os valores angulares dos jatos urinários intravesicais e as distâncias entre os meatos ureterais foram obtidos para todos os pacientes e foram calculados a média, o desvio-padrão e o coeficiente de variação. CONCLUSÃO: Os dados evidenciaram tendência de que a lateralização do meato ureteral seja sinal de predisposição ao refluxo vesicoureteral. A análise estatística não-paramétrica de Mann-Whitney não evidenciou diferenças significativas (p > 0,05 entre os grupos (ângulos de inclinação dos jatos urinários intravesicais e distância entre os meatos ureterais.OBJECTIVE: The present study had as its objective to compare the findings of voiding cystourethrography with those of duplex color Doppler in patients with suspected vesicoureteral reflux. MATERIALS AND METHODS: The research was developed through the study of ureterovesical jet angles, both in axial and longitudinal planes. Also, the distance (in cm between ureteral meatuses was analyzed. RESULTS: From a total sample of 32 patients (mean age of five years and two months, 18 presented with vesicoureteral reflux (10 with unilateral reflux - 4 right-sided and 6 left-sided -, and 8 with bilateral reflux and 14 patients did not presented with reflux. The angles of ureterovesical jet and

  4. DDD(R)-pacing, but not AAI(R)-pacing induces left ventricular desynchronization in patients with sick sinus syndrome: tissue-Doppler and 3D echocardiographic evaluation in a randomized controlled comparison.

    Science.gov (United States)

    Albertsen, Andi Eie; Nielsen, Jens Cosedis; Poulsen, Steen Hvitfeldt; Mortensen, Peter Thomas; Pedersen, Anders Kirstein; Hansen, Peter Steen; Jensen, Henrik Kjaerulf; Egeblad, Henrik

    2008-02-01

    Increasing evidence from randomized trials and experimental studies indicates that right ventricular (RV) pacing may induce congestive heart failure. We studied regional left ventricular (LV) dyssynchrony and global LV function in 50 consecutive patients with sick sinus syndrome (SSS) randomized to either atrial pacing [AAI(R)] or dual chamber RV-pacing [DDD(R)]. Fifty consecutive patients were randomized to AAI(R) or DDD(R)-pacing. Tissue-Doppler imaging was used to quantify LV dyssynchrony in terms of number of segments with delayed longitudinal contraction (DLC). Left ventricular ejection fraction (LVEF) was measured using three-dimensional echocardiography. Dyssynchrony was more pronounced in the DDD(R)-group than in the AAI(R)-group at the 12 months follow-up (P DDD(R)-group from baseline to the 12 months follow-up (1.3 +/- 1 to 2.1 +/- 1 segments displaying DLC per patient), P DDD(R)-mode after 12 months of pacing although LVEF decreased significantly in the DDD(R)-group from baseline (63.1 +/- 8%) to the 12 months follow-up (59.3 +/- 8%, P DDD(R)-pacing but not AAI(R)-pacing induces significant LV desynchronization and reduction of LVEF.

  5. Determination of the best position and site for color Doppler ultrasonographic evaluation of the testicular vein to define the clinical grades of varicocele ultrasonographically.

    Science.gov (United States)

    Karami, Mehdi; Mazdak, Hamid; Khanbabapour, Saeid; Adibi, Atoosa; Nasr, Nafiseh

    2014-01-01

    There are no generally accepted criteria for the ultrasonographic diagnosis and grading of varicocele. We aimed to determine the best position and site for color Doppler ultrasonographic (CDUS) evaluation of the testicular vein to define the clinical grades of varicocele ultrasonographically. This study consisted of 103 men (44 normal and 59 with clinical varicocele). First, WHO clinical grade of varicocele was determined by physical examination. Then, the diameter of largest testicular vein at four different sites was measured in both upright and supine positions with or without Valsalva maneuver. Finally, the cut-off points of venous diameter for different clinical grades were determined using the values of the position and sites that had the strongest correlation with the clinical grades. The strongest correlation between venous diameter and clinical grade of varicocele was observed when the venous diameter was measured at the level of epididymal head in the upright position with Valsalva maneuver (r: 0.87, P-value best position for CDUS examination of patients suspected of having varicocele is the upright position with Valsalva maneuver, and the best site for venous diameter measurement is at the level of epididymal head.

  6. Automated Quantification of Mitral Regurgitation by Three Dimensional Real Time Full Volume Color Doppler Transthoracic Echocardiography: A Validation with Cardiac Magnetic Resonance Imaging and Comparison with Two Dimensional Quantitative Methods

    OpenAIRE

    Son, Jang-Won; Chang, Hyuk-Jae; Lee, Jin-Kyung; Chung, Hee-Jung; Song, Ran-Young; Kim, Young-Jin; Datta, Saurabh; Heo, Ran; Shin, Sang-Hoon; Cho, In-Jeong; Shim, Chi Young; Hong, Geu-Ru; Chung, Namsik

    2013-01-01

    Background Accurate assessment of mitral regurgitation (MR) severity is crucial for clinical decision-making and optimizing patient outcomes. Recent advances in real-time three dimensional (3D) echocardiography provide the option of real-time full volume color Doppler echocardiography (FVCD) measurements. This makes it practical to quantify MR by subtracting aortic stroke volume from the volume of mitral inflow in an automated manner. Methods Thirty-two patients with more than a moderate degr...

  7. Ultra-sonografia transvaginal com doppler colorido para seleção das pacientes para tratamento conservador da gravidez ectópica íntegra Transvaginal ultrasonography with color doppler to select the patients for conservative treatment of unruptured ectopic pregnancy

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    Julio Elito Junior

    1999-04-01

    Full Text Available Objetivo: avaliar a eficiência da ultra-sonografia (US transvaginal com Doppler colorido para a previsão dos resultados do tratamento sistêmico da gravidez ectópica íntegra com dose única de metotrexato. Pacientes e método: vinte pacientes com diagnóstico de gravidez ectópica foram incluídas no estudo. Os critérios de inclusão foram: estabilidade hemodinâmica, massa anexial com diâmetro Purpose: to evaluate the efficacy of color Doppler in the prediction of results of the systemic treatment of unruptured ectopic pregnancy with a single dose of methotrexate. Methodology: twenty patients with a diagnosis of ectopic pregnancy were included in the study. The inclusion criteria were: hemodynamic stability, adnexal mass < 5.0 cm and decline of the titers of beta-hCG less than 15% in an interval of 24 h. The exclusion criteria were hepatic or renal disease and blood dyscrasias. Follow-up was by serial determinations of beta-hCG on days 4 and 7 after the beginning of the treatment, and weekly until the titers were negative. The patients were classified into 3 groups according to color Doppler: high risk (trophoblastic flow covering more than 2/3 of the mass, medium risk (when trophoblastic flow compromised 1/3 to 2/3 of tubal mass and low risk (when trophoblastic flow covered less than 1/3 of the mass. Results: the success of the treatment with a single dose was 75% (15/20; when a second dose of MTX was used, the success rate was 85%. When comparing color Doppler with the results of the medical treatment, we had high risk in 4 patients and in all the treatment failed; medium and low risk in 16 patients, and in 15 the treatment was successful. Conclusion: color Doppler showing high risk indicated an unfavorable situation for the medical treatment with MTX, while medium and low risk in color doppler were favorable situations for the clinical treatment. However, these results should always be analyzed in association with the evolution curve

  8. OCT angiography and Color Doppler Imaging in the study of hemoperfusion in the retina and optic nerve in POAG

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    N. I. Kurysheva

    2016-01-01

    Full Text Available Purpose: To evaluate the hemoperfusion of Optic Nerve Disk (OND, peripapillary and macular areas, and retrobulbar blood flow in patients with primary open-angle glaucoma using optical coherence tomography with angiography (OCT-A and Сolor Doppler Imaging (CDI.Patients and Methods: 65 eyes of patients with primary open angle glaucoma (POAG and 22 eyes of age-matched healthy subjects were examined using the SD-OCT-А (RtVue xR Avanti with the AngioVue software. Retinal Thickness and Angio Flow Density (AFD were measured. AFD Disc and Peripapillary Flow Density were measured in OND and in peripapillary area. AFD Retina were evaluated in Macula inсluding Fovea- and Parafovea regions (superficial and deep of the inner retinal layers. Ophthalmic Artery (OA, Central Retinal Artery (CRA, Posterior short Ciliary Arteries (PCA, Central Retinal Vein (CRV and Vortex Vein (VV were measured by CDI. Statistical analysis was performed using SPSS version 21 and MASS library of language R. The value of each diagnostic indicator (z-value was calculated with the Wilcoxon-Mann-Whitney test and the area under the receiver operating characteristic curve (AUC.Results: Both OCT-A and CDI indicators were reduced in glaucoma compared to healthy eyes. The following indicators had the largest AUC and diagnostic value (z-value to discriminate the early glaucoma from normal eyes: AFD Retina Superficial Whole En Face (z = 3,83, p<0,0001; AUC 0,8 (0,69‑0,90, AFD Retina Deep Whole En Face (z = 3,31, p = 0,0007; AUC 0,76 (0,64‑0,88, Peripapillary Vessel Density (z = 3,2, p = 0,001; AUC 0,75 (0,63‑0,87, end-diastolic flow velocity in AO (z = 3,03, p = 0,002; AUC 0,74 (0,61‑0,86 and in TPCA (z = 2,78, p = 0,005; AUC 0,72 (0,58‑0,86; and to discriminate the early glaucoma from the advanced and far advanced stages: AFD Disc Peripapillary Inferior Temporalis (z = 5,61, p<0,0001; AUC 0,94 (0,86‑1,0 and the mean flow velocity in the CRA (z = 4,16, p<0

  9. Ecografia transfontanelar com fluxo a cores em recém-nascidos prematuros Intracranial blood flow velocities evaluated by color doppler (duplex in preterm infants

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    Marcelo Cardoso de Assis

    2004-03-01

    intracranial hemorrhage. They were subjected to sequencial measurements of blood flow velocities in the intracranial arteries. The gestational age of the whole group varied from 28 to 36 weeks and birth weights between 720 and 2530 g. The diagnosis of the intracerebral hemorrhages in these preterm neonates were done using high resolution gray and color scale transfontanellar ultrasonography brain scans . The ultrasound evaluations were performed in the initial 3rd, 7th and 14th day of life. The 73 preterm infants were evaluated with sequencial measurements of blood flow velocity in the intracranial arteries using the Doppler technique through the anterior fontanelle. Doppler evaluation of the cerebral vessels were performed on days 3, 7, 30 and 90 of life. These evaluations were performed in the six intracranial arteries, meaning: right and left anterior and middle cerebral arteries and right and left internal carotid arteries. Doppler recordings were made using Duplex Color-Doppler system, pulse echo probe of 3,5; 5,0 and 7,5 MHz. Measuring the blood flow velocity in the cerebral arteries we obtained a maximum systolic velocity and end diastolic velocity with a rate in meters per second (m/s for each cardiac cycle. After obtaining these numerical values for these velocities we obtained the resistance index (RI or Pourcelot index. In a progressive way as the resistance index (RI values were being obtained in each stage of this study they were also being checked in the cerebral arteries of healthy preterm infants and infants with intracranial hemorrhages. We also analyzed in a comparative method the values of the resistive index between the two groups of preterm infants observing their behaviour.The results obtained when comparing the RI values in the various arteries during the different stages of the study permitted us to conclude that the RI values of healthy pre-term infants were always larger than the RI values of pre-term infants with intracranial hemorrhage. We also

  10. Color Doppler indices of orbital arterial flow in end-stage renal disease patients; are the changes related to chronic hemodialysis or chronic renal failure?

    Science.gov (United States)

    Rokni Yazdi, Hadi; Faraji, Safoura; Ahmadi, Farokhlegha; Shahmirzae, Reza

    2012-03-01

    Endothelial injury is a well-known complication in chronic kidney disease (CKD) and hemodialysis. One of the sites in which early vascular changes may be detected is the retina. Of course, these flow changes may not be detected in ophthalmologic exams, but it seems that color Doppler sonography of retinal arteries may be helpful in these cases. In previous studies on CKD patients who underwent chronic hemodialysis,hemodynamic changes were noted in retinal arteries, but no study has been performed to determine which of the two processes (CKD or chronic hemodialysis) can produce these changes. In this study, we tried to answer this question. Doppler ultrasonography of the orbital vasculature including the ophthalmic artery and the central retinal artery was carried out in 17 patients (34 eyes) with chronic renal failure (CRF) who underwent hemodialysis, 17 patients (34 eyes)with CRF without a history of hemodialysis and 17 normal patients (34 eyes). The peak systolic velocity (PSV), end diastolic velocity (EDV) and resistance index were measured excluding hypertensive, diabetic patients and patients with cardiovascular disease. The mean PSV and EDV were lower only in the ophthalmic artery of CRF patients irrespective of the history of hemodialysis (PSV was 35.2 in hemodialysis, 38.8 in CRF and 51.6 in normal patients, P value = 0.001 and EDV was 7.4, 9.4, 11.8, respectively, P value =0.001) with no significant difference in the resistance index of the ophthalmic artery and other parameters [EDV, PSV, Resistance Index (RI)] in the central retinal artery. The mean PSV and DSV in the ophthalmic artery were lower only in the ophthalmic artery of CRF patients regardless of the history of hemodialysis. No significant difference in the resistance index of the ophthalmic artery and other parameters (EDV, PSV) of the central retinal artery were noted between different groups. These findings suggest that microvascular disease and endothelial cell dysfunction of the orbital

  11. Congenital Heart Diseases in the Newborns of Diabetic Mothers: an Echocardiographic Study

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    S Rahimpour

    2011-10-01

    Full Text Available Introduction: Despite the discovery of insulin and current improvement in diabetics care, congenital malformations in diabetics are still more frequent than in the general population. The aim of this study was to identify congenital heart dieases (CHD in the newborns of diabetic mothers (IDMS. Methods: In our prospective study, color doppler echocardiography was performed in 75 consecutive full- term newborns of diabetic mothers by GE Vivid3 echocardiographic device. Newborns were classified into two subgroups according to the type of the mothers’ diabetes: pre-gestational and gestational. They were also those were classified into three subgroups according to their birth weight: appropriate, large and small for gestational age. Data analysis was made by Fisher exact test and Chi-Square test. Results: Forty nine (65% and thirty six (35% of subjects were infants of gestational (IGDM and pre-gestational diabetic mothers (IPDM, respectively. Fifty five Newborns (73% were apropriate, fourteen (19% were large and six (8% were small for gestational age. The most common echocardiographic findings included: patent ductus arteriosus (PDA: 54.7%, hypertrophic cardiomyopathy (HCMP: 24%, ventricular septal defect (VSD: 4%, atrial septal defect (ASD: 2.7%, transposition of great arteries (TGA: 1.3% and coarctation of the Aorta (COA: 1.3%. Overall incidence of congenital heart diseases was 9.3 after exclusion of PDA and HCMP cases. The incidence of congenital heart diseases was higher in macrosomic than nonmacrosomic infants of diabetic mothers (P<0.001. Congenital heart diseases were more common in infants of pre-gestational than gestational diabetic mothers (P=0.004. Conclusion: Our results showed that diabetic mothers are at increased risk of giving birth to a newborn with congenital heart disease, and transthoracic echocardiography is recommended for all infants of diabetic mothers.

  12. Effect of food intake on commonly used pulsed Doppler and tissue Doppler measurements.

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    Dencker, Magnus; Björgell, Ola; Hlebowicz, Joanna

    2011-09-01

    This study evaluates the effect of food intake on commonly used pulsed Doppler and tissue Doppler measurements. Twenty-three healthy subjects aged 25.6 ± 4.5 years were investigated. A wide selection of pulsed Doppler and tissue Doppler variables were measured before a standardized meal as well as and 30 and 110 minutes afterwards. The following variables increased significantly (P Doppler peak systolic velocities, and late diastolic velocities. Deceleration time of E-wave decreased significantly (P 0.05) changes in E/A, early diastolic tissue Doppler velocities (e'), and E/e'. Most, but not all variables returned to baseline values 110 minutes after food intake. This study shows that food intake affects several echocardiographic variables used to routinely assess diastolic function and hemodynamics. Further studies are warranted in older healthy subjects and in patients with various cardiac diseases to determine whether the findings are reproducible in such populations. © 2011, Wiley Periodicals, Inc.

  13. Using the MEM-net program to report on mapping the EchoColorDoppler assessment for chronic cerebro spinal venous insufficiency

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    Mandolesi S

    2014-07-01

    Full Text Available Sandro Mandolesi,1 Aldo d’Alessandro,2 Ettore Manconi,3 Tarcisio Niglio,4 Augusto Orsini,5 Dimitri Mandolesi,6 Alessandro d'Alessandro,7 Francesco Fedele1 1Department of Cardiovascular and Respiratory Sciences, Sapienza University Rome, Rome, Italy; 2Department of Angiology, “T Masselli-Mascia” Hospital, San Severo (FG, Foggia, Italy; 3Department of Cardiovascular and Neurological Sciences, University of Cagliari, Cagliari, Italy; 4Istituto Superiore di Sanità, Rome, Italy; 5Department of Vascular Surgery, “Gioia” Hospital, Sora (FR, Sora, Italy; 6Medicina del lavoro Sapienza University Roma, Rome, Italy; 7Faculty of Medicine, Catholic University “Our Lady of Good Counsel,” Tirana, Albania Introduction: Chronic cerebrospinal venous insufficiency (CCSVI is characterized by multiple stenosis/obstructions affecting the principal extracranial outflow pathways of the cerebrospinal venous system. Using EchoColorDoppler (ECD to assess chronic CCSVI is a very difficult and long examination. It takes about an hour even for an expert sonographer. Methods: Hemodynamic morphological map (MEM-Net is a program that works on the Internet. All the morphological and hemodynamic data of the patient can be entered into the program’s anatomical scheme to create a map of the ECD report. The program also allows us to collect all the data during the ECD assessment and, using its algorithm, make the report uniform. Conclusion: Reporting on the map by using MEM-net shortens the time of ECD written reporting that is done automatically. The program also makes a blind control of the report and enables the use of it for scientific research. We hope that in the future everyone will use this data collection tool for all scientific work on this topic. Keywords: CCSVI, ECD, Map, cerebral venous system, sonography

  14. Color Doppler imaging of the retrobulbar circulation and plasmatic biomarkers of vascular risk in age-related macular degeneration: A pilot study

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    Fermin Rodrigo

    2018-01-01

    Full Text Available Purpose: To evaluate preliminarily and compare the level of plasmatic biomarkers of vascular risk in patients with and without exudative age-related macular degeneration (ARMD and to relate it to vascular resistance alterations in the ophthalmic artery (OA, central retinal artery (CRA, posterior temporal ciliary artery (PTCA, and posterior nasal ciliary artery (PNCA. Methods: Color Doppler imaging of the OA, CRA, PTCA, and PNCA was performed in 30 eyes of 30 cataract patients (control group as well as in 30 eyes of 30 patients with naive exudative ARMD (study group, measuring the peak systolic velocity, end-diastolic velocity (EDV, and Pourcelot resistive index (RI. Likewise, in both groups, a blood test was performed to determine the plasmatic levels of homocysteine, C-reactive protein (CRP, B12 vitamin, and folic acid. Results: A positive and significant correlation was found between the level of CRP and RI of the OA in the ARMD group (r = 0.498, P = 0.005, with an increased RI in all arteries compared to controls, although differences only reached statistical significance for the PTCA (P = 0.035. Likewise, a significantly lower EDV for the CRA was found in ARMD eyes compared to controls (P = 0.041. In the study group, significantly higher plasmatic levels of homocysteine (P = 0.042 and CRP (P = 0.046 were found. In contrast, no significant differences were found between groups in the levels of folic acid (P = 0.265 and B12 vitamin (P = 0.520. Conclusion: The decrease of the choroidal perfusion related to hyperhomocysteinemia, and increase in the CRP plasmatic levels may play an etiological role on the exudative ARMD. This should be investigated in future studies with larger samples of patients.

  15. In vitro validation of real-time three-dimensional color Doppler echocardiography for direct measurement of proximal isovelocity surface area in mitral regurgitation.

    Science.gov (United States)

    Little, Stephen H; Igo, Stephen R; Pirat, Bahar; McCulloch, Marti; Hartley, Craig J; Nosé, Yukihiko; Zoghbi, William A

    2007-05-15

    The 2-dimensional (2D) color Doppler (2D-CD) proximal isovelocity surface area (PISA) method assumes a hemispheric flow convergence zone to estimate transvalvular flow. Recently developed 3-dimensional (3D)-CD can directly visualize PISA shape and surface area without geometric assumptions. To validate a novel method to directly measure PISA using real-time 3D-CD echocardiography, a circulatory loop with an ultrasound imaging chamber was created to model mitral regurgitation (MR). Thirty-two different regurgitant flow conditions were tested using symmetric and asymmetric flow orifices. Three-dimensional-PISA was reconstructed from a hand-held real-time 3D-CD data set. Regurgitant volume was derived using both 2D-CD and 3D-CD PISA methods, and each was compared against a flow-meter standard. The circulatory loop achieved regurgitant volume within the clinical range of MR (11 to 84 ml). Three-dimensional-PISA geometry reflected the 2D geometry of the regurgitant orifice. Correlation between the 2D-PISA method regurgitant volume and actual regurgitant volume was significant (r(2) = 0.47, p PISA regurgitant volume underestimate was 19.1 +/- 25 ml (2 SDs). For the 3D-PISA method, correlation with actual regurgitant volume was significant (r(2) = 0.92, p PISA method showed less regurgitant volume underestimation for all orifice shapes and regurgitant volumes tested. In conclusion, in an in vitro model of MR, 3D-CD was used to directly measure PISA without geometric assumption. Compared with conventional 2D-PISA, regurgitant volume was more accurate when derived from 3D-PISA across symmetric and asymmetric orifices within a broad range of hemodynamic flow conditions.

  16. General principles of carotid Doppler ultrasonography

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Whal [Dept. of Radiology, Seoul National University College of Medicine, Seoul (Korea, Republic of)

    2014-03-15

    Carotid Doppler ultrasonography is a popular tool for evaluating atherosclerosis of the carotid artery. Its two-dimensional gray scale can be used for measuring the intima-media thickness, which is very good biomarker for atherosclerosis and can aid in plaque characterization. The plaque morphology is related to the risk of stroke. The ulceration of plaque is also known as one of the strong predictors of future embolic event risk. Color Doppler ultrasonography and pulse Doppler ultrasonography have been used for detecting carotid artery stenosis. Doppler ultrasonography has unique physical properties. The operator should be familiar with the physics and other parameters of Doppler ultrasonography to perform optimal Doppler ultrasonography studies.

  17. Penile Doppler ultrasonography revisited

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    Dae Chul Jung

    2018-01-01

    Full Text Available Penile Doppler ultrasonography is a high-performing, noninvasive or minimally-invasive imaging modality that allows the depiction of the normal anatomy and macroscopic pathologic changes in real time. Moreover, functional changes in penile blood flow, as seen in erectile dysfunction (ED, can be analyzed using color Doppler ultrasonography (CDUS. This review article describes the normal sonographic anatomy of the penis, the sonographic technique for evaluating ED, the normal phases of erection, and the various causes of ED. Additionally, we describe the interpretation of different parameters and findings on penile CDUS for the diagnosis and classification of ED, priapism, and Peyronie disease.

  18. Evaluación características operativas: ecografía 2D y Doppler color para diagnóstico de acretismo placentario, clínica universitaria colombia, bogotá.

    OpenAIRE

    Gutiérrez Sánchez, Luz Angela

    2011-01-01

    La placenta ácreta es la implantación anómala de la placenta en la pared uterina. Se presenta en 0.9% de todos los embarazos; actualmente es una de las causas más importantes de morbimortalidad materna. Ecografía 2D y Doppler placentario son métodos diagnósticos de primera y segunda línea. Objetivo: Evaluar la utilidad diagnóstica de ecográfica 2D y Doppler color Placentario para diagnóstico de acretismo placentario en gestantes con factores de riesgo comparándolos con diagnóstico cl...

  19. Comparison of findings of spontaneous splenorenal shunt in color Doppler sonography with multislice CT scan (64 slices) in liver transplant candidates

    Energy Technology Data Exchange (ETDEWEB)

    Bagheri, Mohammadhadi, E-mail: Bagherimh@gmail.com [Department of Radiology, Shiraz University of Medical Sciences, Namazi Hospital, Shiraz (Iran, Islamic Republic of); Hajati, Azadeh, E-mail: azadeh.hajati@gmail.com [Department of Radiology, Shiraz University of Medical Sciences, Namazi Hospital, Shiraz (Iran, Islamic Republic of); Hosseini, Mohammadkazem, E-mail: hosseiniaslm@sums.ac.ir [Department of Radiology, Shiraz University of Medical Sciences, Namazi Hospital, Shiraz (Iran, Islamic Republic of); Ostad, Seyed Pouria, E-mail: Pouria.Ostad@gmail.com [Department of Radiology, Shiraz University of Medical Sciences, Namazi Hospital, Shiraz (Iran, Islamic Republic of)

    2012-09-15

    Background: Liver transplantation is the only definite treatment for end stage liver disease and it has high costs for the medical system so decreasing its complication and increasing its effectiveness is crucial. One of the factors that affect liver transplantation is the presence of spontaneous splenorenal shunt. Its diagnosis is mainly overlooked in pre-liver transplant patients. Main modality for its diagnosis is multislice CT scan however this is more expensive than sonography. Also, it exposes the patients to ionizing radiation. Considering the advantages of color Doppler ultrasound, studies to determine the sensitivity and specificity for detection of spontaneous splenorenal shunt is essential. Materials and methods: In our study 70 cirrhotic patients who were referred by liver transplant surgeons for evaluation of abdomen by CT and sonograhy were assessed for presence of spontaneous splenorenal shunt, left adrenal varix and left renal vein diameter and velocity and sensitivity and specificity of both modalities were checked. Patients in whom left renal vein could not evaluated by sonography and patients with splenectomy and nutcracker syndrome were excluded. Results: In the point of 10 mm diameter of left renal vein in CT scan there was 78.6% sensitivity and 67.9% specificity for the presence of spontaneous splenorenal shunt. Left adrenal varix in CT had sensitivity of 71.4%, specificity of 100%, and positive predictive value of 100% and negative predictive value of 70% and varix below spleen in CT had sensitivity of 54.8%, specificity of 96.4%, and positive predictive value of 95.8% and negative predictive value of 58.7% for the presence of spontaneous splenorenal shunt. In the point of 8 mm diameter of left renal vein in sonography there was 66.7% sensitivity and 85.7% specificity for the presence of spontaneous splenorenal shunt. For the velocity of more than 35 cm/s of left renal vein in sonography there was 61.9% sensitivity and 82.1% specificity for

  20. Correlation between morphologic carotid plaque findings based on color-Doppler and CT multidetector angiography with intraopertive findings in carotid artery stenosis

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    Savić Živorad N.

    2010-01-01

    Full Text Available Bacground/Aim. Vast majority of patients with corotid artery sclerosis do not have transitory ischemic attacks (TIA as working to the persistent silent disease, but stroke is the first sign. Precise and early diagnosis of the carotid artery disease and plaques are very important. The aim of this study was to determine how the composition / identity of diagnostic methods, color-Doppler, ultrasonography (US CT multidetector angio (MDCTA scan and intraoperative (IO findings, as well as the morphology of plaques in patients with haemodynamic significant stenosis of the internal carotid artery. Methods. Carotid plaques were observed by two diagnostic methods, US and MDCTA, and these findings were correlated with the IO findings. Results. In 62 patients both carotid artheries were examined and 83 plaques were observed. There were 68 surgical interventions. The structure of plaques was divided into four types: lipid, fibrous, fibrocalcified and calcified plaque. US showed: lipid plaques 10.8%; fibrous 1.2%; fibrocalcified 44.6% and calcified 43.4%, and the MDCTA lipid plaques 8.4%; fibrocalcified 48.2% and calcified 43.4%. Intraoperative findings were: lipid plaques 10.3%; fibrocalcified 41.2% and calcified 48.5%. A statistically highly significant agreement between the US and MDCTA in the diagnosis of plaque morphology was obtained (Cramer's V = 0.919, p < 0.01; Lambda = 0.921, p < 0.01 and also statistically significant agreement between US and IO findings (Cramer' s V = 0.831, p < 0.01; Lambda = 0.859, p < 0.01. A statistically highly significant agreement between MDCTA and IO findings in plaque morphology was found, as well (Cramer's V = 0.815, p < 0.01; Lambda = 0.829, p < 0.01. Conclusion. There is statistically highly significant correlation between US and MDCTA diagnostic methods in the evaluation of plaque morphology in surgically significant stenosis of internal carotid artery as well as their agreement with the intraoperative finding.

  1. Automatic quantification of aortic regurgitation using 3D full volume color doppler echocardiography: a validation study with cardiac magnetic resonance imaging.

    Science.gov (United States)

    Choi, Jaehuk; Hong, Geu-Ru; Kim, Minji; Cho, In Jeong; Shim, Chi Young; Chang, Hyuk-Jae; Mancina, Joel; Ha, Jong-Won; Chung, Namsik

    2015-10-01

    Recent advances in real-time three-dimensional (3D) echocardiography provide the automated measurement of mitral inflow and aortic stroke volume without the need to assume the geometry of the heart. The aim of this study is to explore the ability of 3D full volume color Doppler echocardiography (FVCDE) to quantify aortic regurgitation (AR). Thirty-two patients with more than a moderate degree of AR were enrolled. AR volume was measured by (1) two-dimensional-CDE, using the proximal isovelocity surface area (PISA) and (2) real-time 3D-FVCDE with (3) phase-contrast cardiac magnetic resonance imaging (PC-CMR) as the reference method. Automated AR quantification using 3D-FVCDE was feasible in 30 of the 32 patients. 2D-PISA underestimated the AR volume compared to 3D-FVCDE and PC-CMR (38.6 ± 9.9 mL by 2D-PISA; 49.5 ± 10.2 mL by 3D-FVCDE; 52.3 ± 12.6 mL by PC-CMR). The AR volume assessed by 3D-FVCDE showed better correlation and agreement with PC-CMR (r = 0.93, p PISA (r = 0.76, p PISA (k = 0.53). In patients with eccentric jets, only 30% were correctly graded by 2D-PISA. Conversely, almost all patients with eccentric jets (86.7%) were correctly graded by 3D-FVCDE. In patients with multiple jets, only 3 out of 10 were correctly graded by 2D-PISA, while 3D-FVCDE correctly graded 9 out of 10 of these patients. Automated quantification of AR using the 3D-FVCDE method is clinically feasible and more accurate than the current 2D-based method. AR quantification by 2D-PISA significantly misclassified AR grade in patients with eccentric or multiple jets. This study demonstrates that 3D-FVCDE is a valuable tool to accurately measure AR volume regardless of AR characteristics.

  2. Clinical Implications of Three-Dimensional Real-Time Color Doppler Transthoracic Echocardiography in Quantifying Mitral Regurgitation: A Comparison with Conventional Two-Dimensional Methods.

    Science.gov (United States)

    Heo, Ran; Son, Jang-Won; Ó Hartaigh, Briain; Chang, Hyuk-Jae; Kim, Young-Jin; Datta, Saurabh; Cho, In-Jeong; Shim, Chi Young; Hong, Geu-Ru; Ha, Jong-Won; Chung, Namsik

    2017-04-01

    Automatic quantification of real-time three-dimensional (3D) full-volume color Doppler transthoracic echocardiography (FVCD) has been proposed as a feasible and accurate method for quantifying MR. We aimed to explore the clinical implications of real-time 3D-FVCD for mitral regurgitation (MR) with various clinical manifestations, in comparison with the conventional two-dimensional (2D) proximal isovelocity surface area (PISA) and volumetric method and cardiac magnetic resonance imaging (CMR) methods. A total 186 patients with MR were enrolled prospectively. Based on exclusion criteria and image quality review, 152 patients were included in the final analysis for 3D-FVCD and 2D transthoracic echocardiography. Among them, 37 patients underwent subsequent CMR for the validation of 3D-FVCD. MR volume from 3D-FVCD demonstrated a better agreement (r = 0.94) with CMR than 2D-PISA or the 2D volumetric method (VM; r = 0.87 vs 0.56). Overall, 2D methods underestimated MR when compared with 3D-FVCD (35.4 ± 28.4 mL for 2D-VM vs 43.8 ± 24.6 mL for 2D-PISA vs 64.6 ± 35.1 mL for 3D-FVCD; P 30 mL for primary MR and >15 mL for secondary MR) between 2D-PISA and 3D-FVCD. In identifying surgical candidates, patients with multijet MR (OR, 4.53, 95% CI, 1.99-10.35) demonstrated a higher risk of discrepancy between 2D-PISA and 3D-FVCD, which were consistent in both primary and secondary MR, respectively. MR quantification with 3D-FVCD showed better correlation and agreement than conventional 2D methods. MR was underestimated by 2D methods, especially in multijet and dilated left ventricle. Multijet MR demonstrated higher risk of discrepancy for the identification of surgical candidate, regardless of MR etiology. Copyright © 2017 American Society of Echocardiography. Published by Elsevier Inc. All rights reserved.

  3. Echocardiographic evaluation of right ventricular function in preterm infants with bronchopulmonary dysplasia.

    Science.gov (United States)

    Bokiniec, Renata; Własienko, Paweł; Borszewska-Kornacka, Maria; Szymkiewicz-Dangel, Joanna

    2017-04-01

    To evaluate right ventricular function in preterm infants with and without bronchopulmonary dysplasia. Eighty-nine preterm infants (bronchopulmonary dysplasia (n=32); (2) mild-bronchopulmonary dysplasia (n=35); (3) severe-bronchopulmonary dysplasia (n=15). Right ventricular echocardiographic parameters included the following: (1) pulsed-wave Doppler through the tricuspid valve (E/A ratio), pulmonary artery acceleration time, right ventricular ejection time, right ventricular velocity-time integral; (2) tissue Doppler measurements of myocardial velocities and atrioventricular conduction times; (3) pulsed-wave Doppler and tissue Doppler evaluation of myocardial performance index and E/E' ratio; and (4) M-mode detection of right ventricular end-diastolic wall diameter. The severe-bronchopulmonary dysplasia group had higher mean right ventricular myocardial performance index (on the 28th day of life by pulsed-wave Doppler) than the no-bronchopulmonary dysplasia (P=.014) or mild-bronchopulmonary dysplasia (P=.031) groups; no differences were found between no-bronchopulmonary dysplasia and mild-bronchopulmonary dysplasia groups (P=.919). A reduction in right ventricular myocardial performance index at later time points was observed in all three groups (Pbronchopulmonary dysplasia severity in other right ventricular echocardiographic parameters. Right ventricular myocardial performance index measured by pulsed-wave Doppler indicates impaired right ventricular function in preterm infants with severe bronchopulmonary dysplasia. © 2017, Wiley Periodicals, Inc.

  4. Evaluation of left ventricular diastolic echocardiographic parameters in healthy dogs by pulsed-wave Doppler Avaliação de parâmetros ecocardiográficos diastólicos do ventrículo esquerdo de cães saudáveis por meio de Doppler pulsátil

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    Guilherme G. Pereira

    2009-04-01

    Full Text Available Left ventricular diastolic dysfunction plays an important role on heart failure progression. In order to obtain additional reference values of left ventricular diastolic parameters and investigate influence of common variables, peak E wave (peak E, peak A wave (peak A, E/A ratio (E/A, E wave deceleration time (EDT and isovolumic relaxation time (IRVT were studied in 40 clinically healthy dogs, by pulsed wave Doppler. The following values were obtained: peak E = 0.747 ± 0.117 m/s, peak A = 0.487 ± 0.062 m/s, E/A = 1.533 ± 0.198, EDT = 88.7 ± 9.2 ms and IRVT = 0.080 ± 0.009 s. Some parameters were influenced by heart rate (peak E, peak A and IRVT, by age (peak A and E/A and by body weight (TRIV. Gender influence was absent. Values obtained can be used as reference for canine specimens but its interpretation should consider on the influence of related variables.A disfunção diastólica do ventrículo esquerdo contribui de maneira importante para a progressão da insuficiência cardíaca. No intuito de obter valores de referência adicionais para os parâmetros diastólicos do ventrículo esquerdo e para investigar a influência de variáveis comuns, estudou-se, por meio de Doppler pulsátil, a velocidade máxima da onda E (Vmáx.E, a velocidade máxima da onda A (Vmáx.: A, a relação E/A (E/A, o tempo de desaceleração da onda E (TDE e o tempo de relaxamento isovolumétrico (TRIV em 40 cães clinicamente saudáveis. Os seguintes valores foram obtidos: Vmáx.E = 0,747±0,117m/s, Vmáx.A = 0,487±0,062m/s, E/A = 1,533±0,198, TDE = 88,7±9,2ms e TRIV = 0,080±0,009s. Alguns parâmetros foram influenciados pela freqüência cardíaca (Vmáx.E, Vmáx.A e TRIV, pela idade (Vmáx.A e E/A e pelo peso corpóreo (TRIV. Não houve influência pelo sexo. Os valores obtidos podem ser utilizados como referência para a espécie canina, porém devem ser interpretados considerando-se a influência das variáveis descritas.

  5. Comprasion of ovarian stromal blood flow measured by color Doppler ultrasonography in polycystic ovary syndrome patients and healthy women with ultrasonographic evidence of polycystic.

    Science.gov (United States)

    Ozdemir, Ozhan; Sari, Mustafa Erkan; Kalkan, Dilek; Koc, Esra Meltem; Ozdemir, Seyda; Atalay, Cemal Resat

    2015-04-01

    To compare ovarian stromal artery blood flows measured by Doppler ultrasonography of polycystic ovary syndrome (PCOS) patients and healthy women with polycystic ovarian image in ultrasonography. Forty-two patients diagnosed with PCOS according to the criteria of 2003 Rotterdam Concencus Conferance on PCOS and 38 healthy volunteers with polycystic ovarian image in ultrasonography were included in the study. Ovarian volumes and ovarian stromal artery blood flows were measured by 3-dimensional (3-D) ultrasonography and Doppler ultrasonography in all patients. In patients with PCOS, ovarian stromal artery pulsatility index (PI) and resistivity index (RI) were found significantly different from healthy women with polycystic ovarian image in ultrasonography (p polycystic ovarian image only. We conclude that Doppler ultrasonography findings of PCOS patients might be helpful in understanding the clinical follow-up and etiology of the disease.

  6. Is the measurement of inferior thyroid artery blood flow velocity by color-flow Doppler ultrasonography useful for differential diagnosis between gestational transient thyrotoxicosis and Graves' disease? A prospective study

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    Sayid Shafi Zuhur

    Full Text Available OBJECTIVE: To determine the role of peak systolic velocity, end-diastolic velocity and resistance indices of both the right and left inferior thyroid arteries measured by color-flow Doppler ultrasonography for a differential diagnosis between gestational transient thyrotoxicosis and Graves' disease during pregnancy. METHODS: The right and left inferior thyroid artery-peak systolic velocity, end-diastolic velocity and resistance indices of 96 patients with thyrotoxicosis (41 with gestational transient thyrotoxicosis, 31 age-matched pregnant patients with Graves' disease and 24 age- and sex-matched non-pregnant patients with Graves' disease and 25 ageand sex-matched healthy euthyroid subjects were assessed with color-flow Doppler ultrasonography. RESULTS: The right and left inferior thyroid artery-peak systolic and end-diastolic velocities in patients with gestational transient thyrotoxicosis were found to be significantly lower than those of pregnant patients with Graves' disease and higher than those of healthy euthyroid subjects. However, the right and left inferior thyroid artery peak systolic and end-diastolic velocities in pregnant patients with Graves' disease were significantly lower than those of non-pregnant patients with Graves' disease. The right and left inferior thyroid artery peak systolic and end-diastolic velocities were positively correlated with TSH-receptor antibody levels. We found an overlap between the inferior thyroid artery-blood flow velocities in a considerable number of patients with gestational transient thyrotoxicosis and pregnant patients with Graves' disease. CONCLUSIONS: This study suggests that the measurement of inferior thyroid artery-blood flow velocities with colorflow Doppler ultrasonography does not have sufficient sensitivity and specificity to be recommended as an initial diagnostic test for a differential diagnosis between gestational transient thyrotoxicosis and Graves' disease during pregnancy.

  7. Effect of a single injection of gonadotropin-releasing hormone (GnRH) and human chorionic gonadotropin (hCG) on testicular blood flow measured by color doppler ultrasonography in male Shiba goats.

    Science.gov (United States)

    Samir, Haney; Sasaki, Kazuaki; Ahmed, Eman; Karen, Aly; Nagaoka, Kentaro; El Sayed, Mohamed; Taya, Kazuyoshi; Watanabe, Gen

    2015-05-01

    Although color Doppler ultrasonography has been used to evaluate testicular blood flow in many species, very little has been done in goat. Eight male Shiba goats were exposed to a single intramuscular injection of either gonadotropin-releasing hormone (GnRH group; 1 µg/kg BW) or human chorionic gonadotropin (hCG group; 25 IU/kg BW). Plasma testosterone (T), estradiol (E2) and inhibin (INH) were measured just before (0 hr) and at different intervals post injection by radioimmunoassay. Testis volume (TV) and Doppler indices, such as resistive index (RI) and pulsatility index (PI) of the supratesticular artery, were measured by B-mode and color Doppler ultrasonography, respectively. The results indicated an increase in testicular blood flow in both groups, as RI and PI decreased significantly (P<0.05), but this increase was significant higher and earlier in hCG group (1 hr) than in the GnRH group (2 hr). A high correlation was found for RI and PI with both T (RI, r= -0.862; PI, r= -0.707) and INH in the GnRH group (RI, r=0.661; PI, r=0.701). However, a significant (P<0.05) correlation was found between E2 and both RI (r= -0.610) and PI (r= -0.763) in hCG group. In addition, TV significantly increased and was highly correlated with RI in both groups (GnRH, r= -0.718; hCG, r= -0.779). In conclusion, hCG and GnRH may improve testicular blood flow and TV in Shiba goats.

  8. PENILE DOPPLER IN THE EVALUATION OF ERECTILE DYSFUNCTION

    OpenAIRE

    Ajmal Shad; Ravichandra; Devdas; Vasu; De, Vivek

    2014-01-01

    Color doppler sonography can be useful in the evaluation of erectile dysfunction, which can result from psychogenic, endocrinologic, neurogenic, pharmacologic, and vasogenic causes. OBJECTIVE: To assess the role of Color doppler sonography in the evaluation of erectile dysfunction. MATERIAL AND METHODS: A cross-sectional study of twelve men with erectile dysfunction (between the age group of 45-60 years) underwent penile color doppler sonography. The hemodynamic function o...

  9. Avaliação ultra-sonográfica e pelo Doppler colorido do carcinoma de células transicionais da bexiga em cães Ultrasonography and color Doppler investigation of transicional cell carcinoma of the bladder in dogs

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    T.R. Froes

    2007-12-01

    Full Text Available Estudaram-se os aspectos ultra-sonográficos das lesões sugestivas de carcinoma de células transicionais (CCT, investigou-se a contribuição do mapeamento Doppler colorido e de amplitude no diagnóstico das lesões sugestivas de CCT e verificou-se a acurácia do método de biópsia ecodirigida por sucção traumática via sondagem uretral na coleta de material para confirmação diagnóstica CCT da bexiga. Para tal, foram selecionados nove cães que atendiam aos critérios de inclusão determinados. Destes, sete apresentavam CCT. A ultra-sonografia permitiu a detecção de massas exofílicas com características vegetantes em cinco cães, e de lesões infiltrativas na parede vesical estendendo-se para a uretra em dois. Pelo exame com Doppler colorido e de amplitude, constatou-se a vascularização interna da massa, indicativa de neoangiogênese tumoral, em quatro animais. A técnica de sucção traumática por aspiração permitiu a elucidação diagnóstica em cinco dos sete animais com CCT. Concluiu-se que, na maioria dos casos, a ultra-sonografia propicia a identificação de lesões sugestivas de CCT, constituindo a primeira técnica de diagnóstico por imagem indicada para pacientes que apresentem hematúria e disúria.The aims of this study were to evaluate the ultrasonographic findings in dogs with suggestive transitional cell carcinoma (TCC lesion, to investigate the use of the color Doppler for the diagnosis of that condition and to establish the efficacy of the ultrasound catheter biopsy by suction via urethral probing for collecting material to confirm bladder TCC. A total of nine dogs were selected, seven with TCC confirmed. The ultrasonographic finding in TCC patients detected sessile masses in the bladder of five dogs and infiltrative mural lesion extent to the urethra in two dogs. The color Doppler and the power Doppler showed the internal vascular flow in four animals indicating tumor neoangiogenesis. It was concluded that the

  10. Ultrasonography and color Doppler in juvenile idiopathic arthritis: diagnosis and follow-up of ultrasound-guided steroid injection in the ankle region. A descriptive interventional study

    DEFF Research Database (Denmark)

    Laurell, Louise; Court-Payen, Michel; Nielsen, Susan

    2011-01-01

    The ankle region is frequently involved in juvenile idiopathic arthritis (JIA) but difficult to examine clinically due to its anatomical complexity. The aim of the study was to evaluate the role of ultrasonography (US) of the ankle and midfoot (ankle region) in JIA. Doppler-US detected synovial...

  11. The effect of isometric exercise of the hand on the synovial blood flow in patients with rheumatoid arthritis measured by color Doppler ultrasound

    DEFF Research Database (Denmark)

    Ellegaard, Karen; Torp-Pedersen, Søren; Lund, Hans

    2013-01-01

    In 90% of patients with rheumatoid arthritis (RA), the joints of the hand are affected. Studies of grip strength training have not indicated a negative effect on disease activity after training. Introduction of ultrasound Doppler (USD) to measure increased blood flow induced by inflammation has...

  12. A comparison of cell-free placental messenger ribonucleic acid and color Doppler ultrasound for the prediction of placental invasion in patients with placenta accreta

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    Elham Naghshineh

    2015-01-01

    Conclusions: Cell-free mRNA is an acceptable, easy made, functional test with sensitivity, specificity, PPV and NPV more than Doppler ultrasound for diagnosis and prediction of incidence of placenta accrete and we recommend the use of cell-free mRNA test for diagnosis of placenta accreta.

  13. O papel da ultra-sonografia vascular com Doppler colorido na avaliação da hipertensão reno-vascular: acurácia da técnica direta de avaliação das artérias renais Vascular color Doppler ultrasound for assessing renovascular hypertension: accuracy of the direct technique for assessing the renal arteries

    Directory of Open Access Journals (Sweden)

    Carlos Alberto Engelhorn

    2004-05-01

    Full Text Available OBJETIVO: Avaliar a acurácia da ultra-sonografia vascular com Doppler colorido em relação à arteriografia digital por subtração de imagens, na identificação das estenoses hemodinamicamente significativas, nas artérias renais. MÉTODOS: Estudados, prospectivamente, pelo exame ultra-sonográfico, 137 artérias renais de 69 pacientes adultos, com suspeita de hipertensão arterial reno-vascular. Os resultados obtidos foram comparados, de maneira duplo-cega, ao estudo arteriográfico digital por subtração de imagens, e calculados a sensibilidade, especificidade, valor preditivo positivo, valor preditivo negativo e acurácia geral do exame para critérios previamente definidos. RESULTADOS: Na comparação entre os métodos, excluindo-se os laudos inconclusivos (7 artérias, das 130 artérias restantes, 116 (89,2% artérias tiveram laudos concordantes e 14 (10,8% discordantes. Os valores de sensibilidade, especificidade, valor preditivo positivo, valor preditivo negativo e acurácia geral da ultra-sonografia vascular com Doppler colorido foram respectivamente 95,33%, 88,14%, 89,86%, 94,55% e 91,94%. CONCLUSÃO: Existiu boa correlação entre os dois exames na avaliação das estenoses hemodinamicamente significativas das artérias renais, tornando-se a ultra-sonografia vascular com Doppler colorido método não invasivo útil na seleção de pacientes com suspeita de hipertensão reno-vascular.OBJECTIVE: To assess the accuracy of vascular color Doppler ultrasound as compared with digital subtraction arteriography for identifying hemodynamically significant renal artery stenoses. METHODS: One hundred and thirty-seven renal arteries from 69 adult patients suspected of having renovascular arterial hypertension were prospectively studied with ultrasound. The results obtained were compared in a double-blind manner with those obtained on digital subtraction arteriography, and the following parameters were calculated according to previously defined

  14. Five-year clinical and echocardiographic evaluation of the Das AngelWings atrial septal occluder.

    Science.gov (United States)

    Kay, Joseph D; O'Laughlin, Martin P; Ito, Kristin; Wang, Andrew; Bashore, Thomas M; Harrison, J Kevin

    2004-02-01

    The late outcome of patients treated with atrial septal occluder devices remains incompletely defined. The purpose of this study was to assess the late outcome (range 4-7 years postprocedure) of patients in whom the Das AngelWings septal occluder device was implanted in the atrial septum. We report the clinical and echocardiographic outcome, at an average of 5 years following the procedure, of patients treated with the Das AngelWings device used to close either a secundum atrial septal defect (ASD) or a patent foramen ovale (PFO). Thirty-two patients underwent successful percutaneous closure of an atrial septal closure, patent foramen ovale, or fenestration in the lateral tunnel of their Fontan with the Das AngelWings device between June 1995 and March 1998 at Duke University Medical Center. Two of the 32 patients were lost to follow-up. The remaining 30 patients were divided into 3 groups based on indication for device implantation. Group 1 consisted of 14 patients with a secundum ASD and predominantly left-to-right atrial shunting. Group 2 consisted of 8 patients who had a PFO and who suffered a thromboembolic event. Group 3 (compassionate use) consisted of 10 patients with multiple comorbid medical problems with predominantly right-to-left shunting at the atrial level causing hypoxemia. Eight of the patients in group 3 were severely ill at the time of device implantation. The 2 remaining patients in group 3 underwent AngelWings implantation for closure of right-to-left shunting through a Fontan fenestration. Mean follow-up was 59 months. There was no device embolization. No patient in the ASD or PFO/stroke group had a clinical complication. By radiographic examination, 2 of 27 patients had evidence of fracture of the nitinol framework at 2-year follow-up. Residual shunting was present in 44% at 24 hours, 20% at 1 year, and 18.8% at 2 years by use of Doppler color flow imaging and/or microcavitation echocardiographic studies. Mild mitral regurgitation caused by

  15. Electrocardiographic And Echocardiographic Findings Of Nigerian ...

    African Journals Online (AJOL)

    ... functions of both categories of athletes were found to be within normal limits and better than the control group. None of the athlete had echocardiographic features suggestive of hypertrophic cardiomyopathy. Key words: Electrocardiography, Echocardiograph in athletes and non athletes. Nigerian Medical Practitioner Vol.

  16. Epicardial surgical ligation of the left atrial appendage is safe, reproducible, and effective by transesophageal echocardiographic follow-up.

    Science.gov (United States)

    Zapolanski, Alex; Johnson, Christopher K; Dardashti, Omid; O'Keefe, Ryan M; Rioux, Nancy; Ferrari, Giovanni; Shaw, Richard E; Brizzio, Mariano E; Grau, Juan B

    2013-01-01

    The left atrial appendage (LAA) is the source of 90% of thrombi in patients with atrial fibrillation. Our double LAA ligation (LLAA) technique was shown to be 96% successful in a small study. However, the outcomes of these patients have yet to be compared with a set of nonligated patients. From 2005 to 2012, a total of 808 patients received LAA using our double ligation technique using both a polydioxanone (PDS) II endosnare and a running 4-0 Prolene pledgeted suture. The 30-day outcomes of these patients were compared with that of nonligated patients. Fifty-six of the ligated patients had a postoperative transesophageal echocardiography (TEE). An echocardiographer reviewed the follow-up TEEs for LAA remnant and/or residual flow into the LAA using color Doppler imaging. The patients with LAA flow and/or remnant depth of 1 cm or greater were deemed to have an unsuccessful exclusion. The ligated group had a trend of less postoperative atrial fibrillation (19.4% vs 22.9%, P = 0.07) and an overall significantly lower in-hospital mortality (0.7% vs 3.0%, P thrombi perioperatively and in the long-term.

  17. Evaluation of canine hepatic masses by use of triphasic computed tomography and B-mode, color flow, power, and pulsed-wave Doppler ultrasonography and correlation with histopathologic classification.

    Science.gov (United States)

    Griebie, Erin R; David, Frederic H; Ober, Christopher P; Feeney, Daniel A; Anderson, Kari L; Wuenschmann, Arno; Jessen, Carl R

    2017-11-01

    OBJECTIVE To determine clinical relevance for quantitative and qualitative features of canine hepatic masses evaluated by use of triphasic CT and B-mode, color flow, power, and pulsed-wave Doppler ultrasonography and to compare diagnostic accuracy of these modalities for predicting mass type on the basis of histopathologic classification. ANIMALS 44 client-owned dogs. PROCEDURES Dogs with histopathologic confirmation (needle core, punch, or excisional biopsy) of a hepatic mass were enrolled. Triphasic CT and B-mode, color flow, power, and pulsed-wave Doppler ultrasonography of each hepatic mass were performed. Seventy quantitative and qualitative variables of each hepatic mass were recorded by 5 separate observers and statistically evaluated with discriminant and stepwise analyses. Significant variables were entered in equation-based predictions for the histopathologic diagnosis. RESULTS An equation that included the lowest delayed-phase absolute enhancement of the mass and the highest venous-phase mass conspicuity was used to correctly classify 43 of 46 (93.5%) hepatic masses as benign or malignant. An equation that included only the lowest delayed-phase absolute enhancement of the mass could be used to correctly classify 42 of 46 (91.3%) masses (with expectation of malignancy if this value was < 37 Hounsfield units). For ultrasonography, categorization of the masses with cavitations as malignant achieved a diagnostic accuracy of 80.4%. CONCLUSIONS AND CLINICAL RELEVANCE Triphasic CT had a higher accuracy than ultrasonography for use in predicting hepatic lesion classification. The lowest delayed-phase absolute enhancement of the mass was a simple calculation that required 2 measurements and aided in the differentiation of benign versus malignant hepatic masses.

  18. Quantification of chronic functional mitral regurgitation by automated 3-dimensional peak and integrated proximal isovelocity surface area and stroke volume techniques using real-time 3-dimensional volume color Doppler echocardiography: in vitro and clinical validation.

    Science.gov (United States)

    Thavendiranathan, Paaladinesh; Liu, Shizhen; Datta, Saurabh; Rajagopalan, Sanjay; Ryan, Thomas; Igo, Stephen R; Jackson, Matthew S; Little, Stephen H; De Michelis, Nathalie; Vannan, Mani A

    2013-01-01

    The aim of this study was to test the accuracy of an automated 3-dimensional (3D) proximal isovelocity surface area (PISA) (in vitro and patients) and stroke volume technique (patients) to assess mitral regurgitation (MR) severity using real-time volume color flow Doppler transthoracic echocardiography. Using an in vitro model of MR, the effective regurgitant orifice area and regurgitant volume (RVol) were measured by the PISA technique using 2-dimensional (2D) and 3D (automated true 3D PISA) transthoracic echocardiography. The mean anatomic regurgitant orifice area (0.35±0.10 cm(2)) was underestimated to a greater degree by the 2D (0.12±0.05 cm(2)) than the 3D method (0.25±0.10 cm(2); PPISA (20±19 mL) was underestimated (PPISA-based (38±14 mL) RVol were comparable (P>0.05 for both). In patients (n=30, functional MR), 3D effective regurgitant orifice area correlated well with cardiac magnetic resonance imaging RVol r=0.84 and regurgitant fraction r=0.80. Compared with cardiac magnetic resonance imaging RVol (33±22 mL), the integrated PISA RVol (34±26 mL; P=0.42) was not significantly different; however, the peak PISA RVol was higher (48±27 mL; Pechocardiography was not significantly different from cardiac magnetic resonance imaging (34±21 versus 33±22 mL; P=0.33). Automated real-time 3D volume color flow Doppler based 3D PISA is more accurate than the 2D PISA method to quantify MR. In patients with functional MR, the 3D RVol by integrated PISA is more accurate than a peak PISA technique. Automated 3D stroke volume measurement can also be used as an adjunctive method to quantify MR severity.

  19. Avaliação por Doppler colorido do carcinoma da mama: correlação com dados clínicos e histopatológicos Color Doppler ultrasound evaluation in breast cancer: correlation with histopathological and clinical data

    Directory of Open Access Journals (Sweden)

    João Bosco Ramos Borges

    2004-10-01

    Full Text Available OBJETIVO: Avaliar a capacidade da ultra-sonografia com Doppler colorido em caracterizar a vascularização de carcinomas sólidos da mama e em correlacionar padrões de vascularização com o tamanho, estádio e grau histológico destes tumores. MATERIAIS E MÉTODOS: Sessenta e seis carcinomas da mama foram estudados com Doppler colorido. As características morfológicas e fluxométricas foram avaliadas antes da biópsia e correlações com aspectos clínicos, histopatólogicos e estadiamento tumoral foram avaliadas estatisticamente. RESULTADOS: Cinqüenta e dois tumores (79% apresentaram vasos penetrantes, 63 (95% mostraram vasos periféricos, 33 (50% tinham vasos centrais e em dois tumores (3% não foi observada vascularização. O número médio de vasos nos tumores foi de 11,9 ± 7,7 e na mama contralateral foi de 1,7 ± 2,5. Nenhuma associação foi evidenciada com as características histológicas. A distribuição dos vasos foi diferente em dois grupos de tumores. Não houve diferença na velocidade diastólica, na resistência e no índice de pulsatilidade dos tumores e da mama contralateral. A velocidade sistólica nos tumores foi de 11,74 ± 0,96 e na mama contralateral foi de 9,45 ± 0,55. O número de vasos aumentou com a progressão do estadiamento dos tumores. CONCLUSÃO: O padrão vascular dos carcinomas da mama identificado pelo Doppler colorido deve ser considerado com potencial característica importante na avaliação pré-operatória destes tumores, em conjunto com outros fatores prognósticos como o tamanho tumoral e o estádio da doença.OBJECTIVE: To evaluate the use of color Doppler ultrasound in the detection of vascularity of solid breast cancer and to correlate patterns of vascular distribution with size, stage and histopathological findings. MATERIALS AND METHODS: Sixty-six breast carcinomas were studied using color Doppler ultrasound. Morphological and fluxometric characteristics were evaluated before performing the

  20. General principles of carotid Doppler ultrasonography

    Directory of Open Access Journals (Sweden)

    Whal Lee

    2014-01-01

    Full Text Available

    Carotid Doppler ultrasonography is a popular tool for evaluating atherosclerosis of the carotid artery. Its two-dimensional gray scale can be used for measuring the intima-media thickness, which is very good biomarker for atherosclerosis and can aid in plaque characterization. The plaque morphology is related to the risk of stroke. The ulceration of plaque is also known as one of the strong predictors of future embolic event risk. Color Doppler ultrasonography and pulse Doppler ultrasonography have been used for detecting carotid artery stenosis. Doppler ultrasonography has unique physical properties. The operator should be familiar with the physics and other parameters of Doppler ultrasonography to perform optimal Doppler ultrasonography studies.

  1. ECHOCARDIOGRAPHIC AND ERGOMETRIC DISTURBANCES IN DIABETICS WITH MYOCARDIAL INFARCTION

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    Ruzica Jankovic

    2003-10-01

    Full Text Available The aim of this study was to examine echocardiographic and ergometric disorders in non-insulin dependent diabetics with myocardial infarction and their correlation with appearing of left ventricular diastolic dysfunction.We examined 80 patients with myocardial infarction (MI treated in Military Hospital in Nis. They were divided into two groups: diabetics and non-diabetics. Doppler echocardiography was used for evaluating left ventricular diastolic function, and ergometric parameters were obtained by bicycle ergometer "Quinton" - Bruce protocol.Diastolic blood pressure and heart rate were higher in diabetics. Double product and power (68.75±13.5 and 50±14.97W were lower in diabetics. They also had frequent appearances of ST depression, dyspnea, palpitation, and rhythm disturbances in rest and after ergo test. Fatigue and pain were more prominent symptoms in non-diabetics. The Doppler mitral E wave was similar between these groups and the A wave was increased in diabetics (0.51 ±0.05 vs. 0.48±0.09, p<0.01. E/A ratio was significantly decreased in diabetics as a sign of worst diastolic dysfunction (1.14±0.09 vs. 1.26±0.17; p<0.01.

  2. Evaluation of pelvic varicose veins using color Doppler ultrasound: comparison of results obtained with ultrasound of the lower limbs, transvaginal ultrasound, and phlebography Avaliação de varizes pélvicas por Doppler colorido: comparação dos resultados obtidos com ultrassom dos membros inferiores, ultrassom transvaginal e flebografia

    Directory of Open Access Journals (Sweden)

    Fanilda Souto Barros

    2010-06-01

    Full Text Available Introduction: Pelvic varicose veins, one of the main causes of chronic pelvic pain and dyspareunia, are an important source of reflux for lower limb varicose veins, especially in recurrent cases. Color Doppler ultrasound of the lower limbs and transvaginal ultrasound are the noninvasive diagnostic methods most commonly used to assess pelvic venous insufficiency, whereas phlebography is still considered as the gold standard. Objectives: To determine the prevalence of lower limb varicose veins originating from the pelvis in a group of female patients and to determine the agreement between results obtained via color Doppler ultrasound of the lower limbs, transvaginal ultrasound, and phlebography. Methods: The sample comprised female patients referred to a vascular laboratory for lower limb screening. Patients diagnosed with deep venous thrombosis were excluded. Data analysis included kappa coefficient of agreement, McNemar's test, sensitivity and specificity values. Results: Of a total of 1,020 patients, 124 (12.2% had findings compatible with reflux of pelvic origin. Among these patients, 51 (41.2% were recurrent cases. A total of 249 were submitted to transvaginal ultrasound. There was significant agreement between lower limb ultrasonographic findings and transvaginal findings. Phlebography was performed in 54 patients. The comparison between transvaginal ultrasound and phlebography was associated with a 96.2% sensitivity and 100% specificity. Conclusions: The authors draw attention to the relatively high prevalence of lower limb varicose veins originating from the pelvis, suggesting an important but underdiagnosed cause of recurrent varicose veins.Introdução: AS VARIZES Pélvicas, uma das principais causas de dor pélvica crônica e dispareunia, são uma importante fonte de refluxo para as varizes dos membros inferiores, especialmente em casos recorrentes. O Doppler colorido dos membros inferiores e o ultrassom transvaginal são os m

  3. Cholinergic stimulation with pyridostigmine, hemodynamic and echocardiographic analysis in healthy subjects

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    Paulo Vasconcellos de Pontes

    1999-03-01

    Full Text Available OBJECTIVE: Growing evidence suggests that sudden death after an acute myocardial infarction (AMI correlates with autonomic nervous system imbalance. Parasympathomimetic drugs have been tested to reverse these changes. However, their effects on ventricular function need specific evaluation. Our objective was to analyze pyridostigmine's (PYR effect on hemodynamic and echocardiographic variables of ventricular function. METHODS: Twenty healthy volunteers underwent Doppler echocardiographic evaluations, blood pressure (BP, and heart rate (HR assessment at rest, before and 120 min after ingestion of 30 mg PYR or placebo, according to a double-blind, placebo-controlled, crossed and randomized protocol, on different days. RESULTS: PYR was well tolerated and did not cause alterations in BP or in ventricular systolic function. A reduction in HR of 10.9±1.3% occurred (p0.05. CONCLUSION: PYR reduces HR and increases E/A ratio, without hemodynamic impairment or ventricular function change.

  4. Effects of Hemodialysis on Tei Index: Comparison between Flow Doppler and Tissue Doppler Imaging.

    Science.gov (United States)

    Gerede, Demet Menekse; Turhan, Sibel; Kaya, Cansin Tulunay; Ozcan, Ozgur Ulas; Goksuluk, Huseyin; Vurgun, Veysel Kutay; Dincer, Irem; Kutlay, Sim; Erturk, Sehsuvar; Erol, Cetin

    2015-10-01

    Myocardial performance index (MPI, Tei index) has been described as a noninvasive measurement of left ventricle (LV) function. Our aim was to investigate the influence of preload on the LV MPI obtained by pulsed-wave tissue Doppler imaging (PWTDI) and determined by flow Doppler waveforms in patients with end-stage chronic renal failure (CRF). The second aim of this study was to investigate the relationship between the Tei indices obtained by both methods. Eighty-four patients on regular hemodialysis (HD) treatment were included (mean age of 45.3 ± 14.5 years). Standard echocardiographic measurements, the Tei indices obtained by conventional flow Doppler and PWTDI methods, mitral inflow velocities, and mitral lateral annulus tissue Doppler velocities were measured immediately before and after hemodialysis. After HD, weight loss in patients was significantly revealed (predialysis 63.6 ± 13.3 kg; postdialysis 60.9 ± 13.0 kg; P Doppler method significantly increased, Tei index measuring by PWTDI did not change after HD. The conventional flow Doppler-derived LV Tei index is influenced by hemodialysis. However, PWTDI-derived LV Tei index is not influenced by hemodialysis. The loading status of a patient should be taken into account during the application of the Tei index to the evaluation of myocardial performance. © 2015, Wiley Periodicals, Inc.

  5. Echocardiograph alterations in asthma patients

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    André Luís Mancini

    2008-05-01

    Full Text Available Introduction: Asthma is a chronic inflammatory disease which has increased during the last 20 years, putting a strain on medical resources, particularly severe forms of the disease. Treatment in such cases is inhaled corticosteroids and beta agonist drugs that can produce a range of side effects. The aim of this study is to identify echocardiograph abnormalities and correlate them with severity of disease. Methodology: Eight-seven outpatients were selected at the asthma unit of the Gaffree Guinle University Hospital (HUGG. Each patient underwent spirometry, electrocardiogram (ECG and echocardiogram (ECO during the trial within a month maximum. Echocardiograph abnormalities found related to degree of asthma. Statistical analysis was made by nonparametric tests. Results: We found significant differences (p ≤ 0.05 for age, disease duration and haemoglobin saturation (SaO2 between the moderate and severe groups. In the sample a high prevalence of tricuspid insufficiency (41.4% was identified. Conclusions: ECO identified a series of abnormalities that were not always dependent on severity of disease. ECO can identify pulmonary hypertension through calculation of mean pressure of the pulmonary artery. Resumo: Introdução: A asma é uma doença inflamatória crónica cuja prevalência vem aumentando nos últimos 20 anos. Demanda grande utilização de recursos, principalmente no grupo grave. Neste, há consumo crónico de corticóides inalatórios e de β2-agonistas, que podem produzir uma série de problemas. O objectivo deste trabalho é o de rastrear as alterações electro e ecocardiográficas e relacioná-las ao grau da asma. Metodologia: Selecionámos 87 doentes do ambulatório de asma do HUGG, que, por rotina, possuem uma espirografia, um eletrocardiograma (ECG e um ecocardiograma (ECO feitos com um intervalo máximo de um mês. As alterações ecocardiográficas encontradas

  6. Diastolic dysfunction revisited: A new, feasible, and unambiguous echocardiographic classification predicts major cardiovascular events.

    Science.gov (United States)

    Johansen, Niklas Dyrby; Biering-Sørensen, Tor; Jensen, Jan Skov; Mogelvang, Rasmus

    2017-06-01

    Echocardiographic classification of DDF has been widely discussed. The aim of this study was to investigate the independent prognostic value of established echocardiographic measures in a community-based population and create a new classification of DDF. Within the Copenhagen City Heart Study, a prospective, community-based study, 1851 participants were examined by echocardiography including Tissue Doppler Imaging (TDI) in 2001 to 2003 and followed with regard to MACE (median, 10.9 years). We found that persons with impaired myocardial relaxation as defined by low peak early diastolic mitral annular velocity e' by TDI had higher incidence of clinical and echocardiographic markers of cardiac dysfunction and increased risk of MACE. Among persons with impaired relaxation, only echocardiographic indices of increased filling pressures such as LAVi≥34 mL/m(2) (HR 1.97 (1.13-3.45, P=.017), E/e' ≥ 17 (HR 1.89 (1.34-2.65), P2 (HR 5.24 (1.91-14.42), P=.001) provided additional and independent prognostic information on MACE. Based on these findings, we created a new classification of DDF where all grades were significant predictors of MACE independently of age, sex, and cardiac clinical risk markers (Mild DDF: HR 1.99 (1.23-3.21), P=.005; Moderate DDF: HR 3.11 (1.81-5.34), PDDF: HR 4.20 (1.81-9.73), PDDF was linearly associated with increasing plasma proBNP concentrations. In the general population, the presence of echocardiographic markers of elevated filling pressures in persons with impaired relaxation increased the risk of MACE significantly. Based on this, we present a new, feasible, and unambiguous classification of DDF capable of accurate risk prediction in the community. Copyright © 2017 Elsevier Inc. All rights reserved.

  7. Centralização do Fluxo Sangüíneo Fetal Diagnosticado pela Dopplervelocimetria em Cores: Resultados Perinatais Brain-sparing Effect Detected by Color Doppler: Perinatal Outcome

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    Cleide Mara Mazzotti Oliveira Franzin

    2001-12-01

    Full Text Available Objetivos: avaliar os resultados perinatais do exame de dopplervelocimetria alterado com centralização de fluxo sangüíneo fetal. Metodologia: foram analisados 32 casos de centralização de fluxo sangüíneo fetal diagnosticados no Centro de Atenção Integral à Saúde da Mulher da Universidade Estadual de Campinas. O diagnóstico de centralização foi confirmado quando a relação entre o índice de pulsatilidade da artéria cerebral média fetal (IPACM e o índice de pulsatilidade da artéria umbilical (IPAU era menor que a unidade (IPACM/IPAU menor que 1. Detectou-se fluxo arterial usando equipamento ultra-sonográfico equipado com mapeamento em cores, marca Toshiba, modelo SSH-140A. Resultados: houve necessidade de cuidados intensivos em 26 fetos (89,6%. O número de dias de internação em unidade de terapia intensiva variou de 1 a 83, com média de 22 dias. A ocorrência de óbito fetal foi de 3/32 (9,4% e de óbito perinatal de 9/29 (31%. Considerando-se a idade gestacional avaliada pelo método de Capurro, a incidência de nascimento de fetos com menos de 36 semanas foi de 21/32 (65,6%. Crescimento intra-uterino restrito ocorreu em 71,8% dos fetos e hipoglicemia em 44,8%. Conclusão: a centralização de fluxo sangüíneo é um marcador de situação danosa ao bem-estar fetal e seu estudo será de grande valia na orientação da conduta obstétrica.Purpose: evaluation of perinatal outcome of brain-sparing effect detected by color Doppler. Methods: brain-sparing effect was detected in 32 fetuses at the Ultrasound Service of the Center for Integral Attention to Women's Health at Campinas State University (UNICAMP. The diagnosis of brain-sparing effect was made when the ratio between middle cerebral artery and umbilical artery pulsatility indexes was below one (IPACM/IPAU <1. The measurement was obtained with color Doppler equipment Toshiba SSH-140A. Results: admission to neonatal intensive care unit (ICU was necessary in 26 fetuses

  8. Modificações da hemodinâmica fetal pelo estímulo sonoro: avaliação pela dopplervelocimetria colorida Vibro-acoustic stimulation induced hemodynamic fetal changes assessed by color doppler

    Directory of Open Access Journals (Sweden)

    Francisco Mauad Filho

    1999-04-01

    Full Text Available Objetivos: verificar se ocorrem ou não alterações hemodinâmicas na aréria cerebral média (ACM aferido pela dopplervelocimetria colorida após realização de um estímulo sonoro. Métodos: trinta fetos de gestantes consideradas clinicamente normais com idade gestacional igual ou superior a 28 semanas foram submetidos a um estímulo sonoro. Examinamos as alterações da velocidade sangüínea na ACM fetal por meio do índice de resistência e da freqüência cardíaca fetal, pelo doppler colorido, antes e depois do estímulo acústico. Resultados: a média da freqüência cardíaca fetal (FCF antes do estímulo sonoro foi de 142,41 batimentos por minuto (bpm com desvio padrão de 9,01 e faixa de variação de 122 a 162 bpm. Após o estímulo sonoro, a média da FCF foi de 159,44 bpm com desvio padrão de 15,49, com faixa de variação de 130 a 187 bpm (pPurpose: to determine the possible occurrence of hemodynamic changes in the middle cerebral artery of the fetus (MCA using color doppler after vibro-acoustic stimulation. Methods: thirty fetuses from pregnant women considered to be clinically normal, with a gestational age of 28 weeks or more were submitted to vibro-acoustic stimulation. We examined the changes in blood flow rate in the middle cerebral artery of the fetus on the basis of resistance index (RI and fetal heart rate (FHR by color doppler before and after the sound stimulus. Results: mean FHR before vibro-acoustic stimulation was 142.41 beats per minute (bpm with a standard deviation of 9.01 and a range of 122 to 162 bpm. After stimulation, mean FHR was 159.44 bpm with a standard deviation of 15.49 and a range of 130 to 187 bpm (p<0.01. Mean RI in the MCA of the fetuses was 75.89% (range: 64 to 91% before the experiment. After the vibro-acoustic stimulation, mean RI was 66.93% (range: 47 to 83%; p < 0.01. Conclusions: we observed that a sound stimulus provokes the well-known immediate and significant elevation of FHR and a

  9. ¿La hipertensión arterial es causa de dolicoarteriopatías carotídeas? Un estudio con eco-Doppler color

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    Ricardo Beigelman

    2007-01-01

    Full Text Available IntroducciónNo existe hasta el momento un criterio uniforme acerca del papel de la hipertensión arterial (HTA como causa de las dolicoarteriopatías carotídeas (DC. Previamente hemos comunicado que las DC serían de origen embriológico por su prevalencia similar en un grupo de niños y adolescentes (voluntarios sanos respecto de otro de adultos.ObjetivosDeterminar la relación de la HTA y de otros factores de riesgo cardiovascular con DC tipos 2 (loop y 3 (kinking.Material y métodosEstudio observacional, descriptivo, prospectivo, transversal y controlado. Se incluyeron 885 pacientes de ambos sexos, con edades desde neonatos (4 h 30 min de nacidos hasta 90 años.Se dividieron en dos grupos: G1 (control, voluntarios sanos n = 245: recién nacidos, niños y adolescentes de hasta 15 años y G2: n = 640, pacientes de 16 a 90 años, que habían sido derivados para la realización de un eco-Doppler de vasos del cuello. Se evaluaron antecedentes de HTA, dislipidemia, diabetes, tabaquismo y la presencia de placas ateromatosas en las zonas correspondientes a dolicoarteriopatías.ResultadosG1: prevalencia de kinking 27% (n = 67 y de loop 4% (n = 10. G2: kinking 22% (n = 143 y loop 3%(n = 19 (p = ns entre ambos grupos. Factores de riesgo en G2: portadores respecto de no portadores de DC: HTA (12% versus 11%, tabaquismo (9% versus 10%, dislipidemia (5% versus 4%, diabetes (1,5% versus 2%; todos, p = ns. Placas ateromatosas intrakinking en G2: 4,3%.ConclusionesNi la HTA ni los demás factores de riesgo cardiovascular analizados, como tampoco las placas ateromatosas, serían los causantes de las dolicoarteriopatías carotídeas.

  10. Intracardiac Vortex Dynamics by High-Frame-Rate Doppler Vortography-In Vivo Comparison With Vector Flow Mapping and 4-D Flow MRI.

    Science.gov (United States)

    Faurie, Julia; Baudet, Mathilde; Assi, Kondo Claude; Auger, Dominique; Gilbert, Guillaume; Tournoux, Francois; Garcia, Damien

    2017-02-01

    Recent studies have suggested that intracardiac vortex flow imaging could be of clinical interest to early diagnose the diastolic heart function. Doppler vortography has been introduced as a simple color Doppler method to detect and quantify intraventricular vortices. This method is able to locate a vortex core based on the recognition of an antisymmetric pattern in the Doppler velocity field. Because the heart is a fast-moving organ, high frame rates are needed to decipher the whole blood vortex dynamics during diastole. In this paper, we adapted the vortography method to high-frame-rate echocardiography using circular waves. Time-resolved Doppler vortography was first validated in vitro in an ideal forced vortex. We observed a strong correlation between the core vorticity determined by high-frame-rate vortography and the ground-truth vorticity. Vortography was also tested in vivo in ten healthy volunteers using high-frame-rate duplex ultrasonography. The main vortex that forms during left ventricular filling was tracked during two-three successive cardiac cycles, and its core vorticity was determined at a sampling rate up to 80 duplex images per heartbeat. Three echocardiographic apical views were evaluated. Vortography-derived vorticities were compared with those returned by the 2-D vector flow mapping approach. Comparison with 4-D flow magnetic resonance imaging was also performed in four of the ten volunteers. Strong intermethod agreements were observed when determining the peak vorticity during early filling. It is concluded that high-frame-rate Doppler vortography can accurately investigate the diastolic vortex dynamics.

  11. The doppler ultrasound. La ecografia Doppler

    Energy Technology Data Exchange (ETDEWEB)

    Contreras Cecilia, E.; Lozano Setien, E.; Hernandez Montero, J.; Ganado Diaz, T.; Jorquera Moya, M.; Blasco Pascual, E. (Hospital Universitario San Carlos. Madrid (Spain))

    1994-01-01

    The discovery and development of Doppler ultrasound has had a great influence on Medical practice since it allows the noninvasive study of vascular pathology, both arterial and venous, as well as the flow patterns of the different parenchyma. This article deals with the principles, limitations and interpretation of the Doppler signal, as well as the different Doppler ultrasound systems routinely employed in Medicine.

  12. Validity of tissue Doppler markers in the assessment of pulmonary hypertension

    Directory of Open Access Journals (Sweden)

    Abdo Nasr

    2014-03-01

    Conclusions: The measurement of IVRT and IVCT by TDI is a simple and reproducible method that correlates well with PASP. It is, therefore, parameters to consider in the echocardiographic assessment of pts with PH, and may be particularly important when the tricuspid Doppler signal is poor.

  13. Doppler tracking

    Science.gov (United States)

    Thomas, Christopher Jacob

    This study addresses the development of a methodology using the Doppler Effect for high-resolution, short-range tracking of small projectiles and vehicles. Minimal impact on the design of the moving object is achieved by incorporating only a transmitter in it and using ground stations for all other components. This is particularly useful for tracking objects such as sports balls that have configurations and materials that are not conducive to housing onboard instrumentation. The methodology developed here uses four or more receivers to monitor a constant frequency signal emitted by the object. Efficient and accurate schemes for filtering the raw signals, determining the instantaneous frequencies, time synching the frequencies from each receiver, smoothing the synced frequencies, determining the relative velocity and radius of the object and solving the nonlinear system of equations for object position in three dimensions as a function of time are developed and described here.

  14. Echocardiographic agreement in the diagnostic evaluation for infective endocarditis

    DEFF Research Database (Denmark)

    Lauridsen, Trine Kiilerich; Selton-Suty, Christine; Tong, Steven Y C

    2016-01-01

    Echocardiography is essential for the diagnosis and management of infective endocarditis (IE). However, the reproducibility for the echocardiographic assessment of variables relevant to IE is unknown. Objectives of this study were: (1) To define the reproducibility for IE echocardiographic variab...

  15. Color doppler evaluation of the influence of type of delivery, sex, postnatal age and time post feeding on full term healthy newborns cerebral blood flow Doppler colorido na avaliação da influência do tipo de parto, sexo, idade pós-natal e tempo pós-mamada no fluxo sanguíneo cerebral em recém-nascidos a termo e saudáveis

    Directory of Open Access Journals (Sweden)

    Carlos Alberto Aranha

    2009-06-01

    Full Text Available OBJECTIVE: The purpose of this study was to evaluate with Color Doppler the influence of type of delivery, sex, postnatal age and time post feeding on full term healthy newborns cerebral blood flow. METHOD: 50 newborns were studied. The Doppler parameters, peak-systolic velocity, end-diastolic velocity, mean velocity, pulsatility index and resistance index, were measured in the anterior cerebral artery, middle cerebral artery, posterior cerebral artery, and basilar artery. The data were compared and analyzed by statistical tests. Informed consent was obtained from all parents, and the study was approved by institutional ethical committee and review board. RESULTS: We observed not statistically significant differences on cerebral blood flow Doppler parameters in relation to type of delivery, sex, postnatal age and feeding in full term healthy newborns. CONCLUSION: We believe that the knowledge of these cerebral hemodynamic profile of newborns in the first days of life can contribute in an accurate interpretation of cranial Doppler abnormal findings when pathologic flow velocities are analyzed.OBJETIVO: O objetivo deste estudo foi avaliar com Doppler colorido a influência do tipo de parto, sexo, idade pós-natal e tempo pós-mamada no fluxo sanguíneo cerebral de recém-nascidos a termo e saudáveis. MÉTODO: Foram estudados 50 recém-nascidos. A Dopplervelocimetria foi obtida nas artérias cerebral anterior, cerebral média, cerebral posterior e basilar. Os parâmetros foram comparados e analisados pelos testes estatísticos Esta pesquisa foi aprovada pela comissão ética e de pós-graduação das instituições e o consentimento informado dos pais foi obtido em todos os casos. RESULTADOS: Não observamos diferenças estatísticamente significativas na Dopplervelocimetria do fluxo sanguíneo cerebral em relação ao tipo de parto, sexo, idade pós-natal e tempo pós-mamada dos recém-nascidos normais e saudáveis estudados. CONCLUS

  16. Correlation of Electrocardiogram with Echocardiographic left ...

    African Journals Online (AJOL)

    In order to device a method of assessment of LVH that is objective, readily available, affordable and easily operable in the face of soaring cost of the more recent techniques, correlation of electrocardiographic (ECG) LVH parameters was done with echocardiographic (echo) left ventricular mass (LVM). ECG is objective ...

  17. Automated contour detection in echocardiographic images

    NARCIS (Netherlands)

    Bosch, Johannes Gijsbertus

    2006-01-01

    We have developed several methods for automated analysis of echocardiographic images. This thesis describes these methods and their evaluation and use. It is shown that semiautomatic detection based on Dynamic Programming and Pattern Matching provides a useful and reliable way of analyzing 2D

  18. Echocardiographic findings in patients with Wegener granulomatosis.

    Science.gov (United States)

    Oliveira, Guilherme H M; Seward, James B; Tsang, Teresa S M; Specks, Ulrich

    2005-11-01

    To describe the spectrum and clinical implications of echocardiographic findings associated with Wegener granulomatosis. We retrospectively reviewed the clinical records and echocardiographic data of consecutive patients with confirmed Wegener granulomatosis referred to the echocardiography laboratory during the 21-year period from 1976 through 1997. Of the 85 patients Identified as having confirmed Wegener granulomatosis, 73 (86%) were found to have echocardiographic abnormalities. In 26 (36%) of these 73 patients, lesions appeared directly related to Wegener granulomatosis. We found regional wall motion abnormalities in 17 (65%) of these 26 patients. Left ventricular systolic dysfunction with decreased ejection fraction was found in 13 patients (50%) and pericardial effusion in 5 patients (19%). Other findings Included valvulitis, left ventricular aneurysm, and a large intracardlac mass. A significantly increased mortality rate was observed among patients who had cardiac involvement of Wegener granulomatosis found by echocardiography. We found a high frequency of echocardiographic abnormalities that appear to be related to Wegener granulomatosis and associated with Increased mortality. Because cardiac involvement in Wegener granulomatosis often is silent and associated with Increased morbidity and worse prognosis, echocardlographic screening of patients with active Wegener granulomatosis may be of clinical value.

  19. Electrocardiographic And Echocardiographic Findings Of Nigerian ...

    African Journals Online (AJOL)

    Summary In a prospective study spanning over 6 months involving one hundred and nineteen male and female subjects comprising 98 Nigerian athletes and 55 age and sex matched controls all had electrocardiography and echocardiographic assessment of left ventricular dimensions and systolic function. Athletes were ...

  20. Common echocardiographic abnormalities in Nigerians of different ...

    African Journals Online (AJOL)

    2012-09-17

    Sep 17, 2012 ... Degenerative valvular diseases, left ventricular diastolic dysfunction, and atrial septal defects were the commonest abnormalities in the elderly, middle-aged population and children, respectively. Key words: Different age groups, echocardiographic abnormalities, Nigerians. Date of Acceptance: 17-Sep- ...

  1. The Relationship Between Hemodialysis and the Echocardiographic Findings in Patients with Chronic Kidney Disease.

    Science.gov (United States)

    Omrani, Hamidreza; Golshani, Sanam; Sharifi, Vahid; Almasi, Afshin; Sadeghi, Masoud

    2016-10-01

    The incidence of cardiac morbidity and mortality is high in patients treated with hemodialysis (HD). The aim of this study was to evaluate the relationship between HD and the echocardiographic findings in patients with chronic kidney disease (CKD). Between 2012 and 2014, 150 patients with CKD. The echocardiographic data were done based on American Society of Cardiology (ASE). Measurement method for Ejection Fraction was E balling and for Diastolic Function was Tissue Doppler. Anemia, thyroid conditions and dialysis through an arteriovenous fistula or permanent catheter of dialysis for the patients are not considered. The mean age at diagnosis for the patients was 57.8 years, 52.7% were males. Out of 150 patients, 112 patients (74.7%) had diabetes and 117 patients (78%) had a history of hypertension. The prevalence of all echocardiographic findings was more after the first dialysis compared with before the first dialysis in diabetic patients (Pdiabetic patients, was not for the tricuspid valve stenosis, impaired right ventricular volume, systolic dysfunction and pulmonary hypertension (P>0.05). According to the findings of this study, seems that more accurate selection of patients for dialysis, paying special attention to hemodynamic change during dialysis, patient education about diet and better control of uremia and diabetes is essential.

  2. Color-Doppler signals of blood flow in the corpus luteum and vascular perfusion index for ovarian and uterine arteries during expansion of the allantochorion in Bos taurus heifers.

    Science.gov (United States)

    Pinaffi, F L V; Araujo, E R; Silva, L A; Ginther, O J

    2017-10-15

    Hemodynamics of the CL and each main uterine artery during expansion of the allantochorion from the ipsilateral side (CL side) to the contralateral side were studied in heifers (n = 8 nonbred, 9 pregnant). Progesterone concentration, vascular perfusion index for each uterine artery (by spectral ultrasonography), extent of blood flow in the CL (percentage of CL tissue with color-Doppler signals of blood flow), and intrauterine location of the expanding allantochorion (by gray-scale ultrasonic imaging) were determined daily from Days 14-60 (Day 0 = ovulation). In the pregnant group, but not in the nonbred group, the percentage of CL tissue with blood-flow signals increased (P flow signals. Functional increases in the CL during early pregnancy were attributed to the greater uterine arterial blood flow on the ipsilateral or CL side and the reported prominent anastomosis from a branch of the uterine artery to the ovarian artery that supplies the CL ovary. After an initial significant decrease in vascular perfusion index in each uterine artery in the pregnant group, the index began to increase on Day 17 in the ipsilateral artery and on Day 18 in the contralateral artery. The perfusion continued in the ipsilateral artery but discontinued in the contralateral artery on Day 21. Perfusion and diameter of the uterine artery were greater for the ipsilateral side until the vesicle entered the contralateral horn on Day 33 and increased for the contralateral horn between vesicle entry and filling of the horn on Day 44. During Days 35-60, the perfusion index (P flow in the ipsilateral uterine artery and (2) blood flow in each of the ipsilateral and contralateral uterine arteries increases as the allantochorion expands in each uterine horn. Copyright © 2017. Published by Elsevier Inc.

  3. Assessment of right ventricular systolic function by tissue Doppler echocardiography

    DEFF Research Database (Denmark)

    Kjærgaard, Jesper

    2012-01-01

    in individual patients [I]. Normal values of tissue Doppler based measurements of RV regional velocities, SR and strain exist, and apply to both sexes and in all age groups with the exception of slightly decreasing values in strain with increasing age. Increasing preload and afterload changes regional...... gained from other quantitative echocardiographic measures of LV and RV function and pressure [VI]. Changes in tissue Doppler based measures of RV systolic function can be used to monitor the effect of selective vasodilation by phosphodiestares-5 inhibition in hypoxic pulmonary hypertension and exercise...... in normal individuals. Phosphodiestares-5 inhibition by sildenafil may predominantly be effective during hypoxia in resting conditions, and may improve the blunted response in RV contractility seen with exercise in hypoxia [VII]. Reduced RV free wall deformation can be quantified by tissue Doppler...

  4. Accuracy of Gray-scale and Three-dimensional Power Doppler ...

    African Journals Online (AJOL)

    uterine serosa–bladder interface were the best 3D power Doppler parameters for the detection of difficult placental separation, considerable intraoperative ... Moodley et al. concluded that color flow Doppler was more specific in the diagnosis ... Two views of 3D power. Doppler were usually analyzed; lateral view to observe.

  5. Doppler ultrasound in obstetrics and gynecology. 2. rev. and enl. ed.

    Energy Technology Data Exchange (ETDEWEB)

    Maulik, D. [Winthrop Univ. Hospital, Mineola, NY (United States). Dept. of Obstetrics and Gynecology; Zalud, I. (eds.) [Kapiolani Medical Center for Women and Children, Honolulu, HI (United States)

    2005-07-01

    The second edition of Doppler Ultrasound in Obstetrics and Gynecology has been expanded and comprehensively updated to present the current standards of practice in Doppler ultrasound and the most recent developments in the technology. Doppler Ultrasound in Obstetrics and Gynecology encompasses the full spectrum of clinical applications of Doppler ultrasound for the practicing obstetrician-gynecologist, including the latest advances in 3D and color Doppler and the newest techniques in 4D fetal echocardiography. Written by preeminent experts in the field, the book covers the basic and physical principles of Doppler ultrasound; the use of Doppler for fetal examination, including fetal cerebral circulation; Doppler echocardiography of the fetal heart; and the use of Doppler for postdated pregnancy and in cases of multiple gestation. Chapters on the use of Doppler for gynecologic investigation include ultrasound in ectopic pregnancy, for infertility, for benign disorders and for gynecologic malignancies. (orig.)

  6. Echocardiographic and pathoanatomical characteristics of isolated left ventricular non-compaction: a step towards classification as a distinct cardiomyopathy.

    Science.gov (United States)

    Jenni, R; Oechslin, E; Schneider, J; Attenhofer Jost, C; Kaufmann, P A

    2001-12-01

    To determine clear cut echocardiographic criteria for isolated ventricular non-compaction (IVNC), a cardiomyopathy as yet "unclassified" by the World Health Organization. The disease is not widely known and its diagnosis mostly missed. In seven out of a series of 34 patients with IVNC the in vivo echocardiographic characteristics were validated against the anatomical examination of the heart removed after death in four and due to heart transplantation in three patients. Four morphological criteria diagnostic for IVNC were found. (1) Coexisting cardiac abnormalities were absent (by definition). (2) A two layer structure was seen, with a compacted thin epicardial band and a much thicker non-compacted endocardial layer of trabecular meshwork with deep endomyocardial spaces. A maximal end systolic ratio of non-compacted to compacted layers of > 2 is diagnostic. (3) The predominant localisation of the pathology was to mid-lateral (seven of seven patients), apical (six), and mid-inferior (seven) areas. The pathological preparations confirmed the echocardiographic findings. Concomitant regional hypokinesia was not confined to the non-compacted segments. (4) There was colour Doppler evidence of deep perfused intertrabecular recesses. Four clear cut echocardiographic diagnostic criteria were established. It is suggested that the WHO classification of cardiomyopathies be reconsidered to include IVNC as a distinct cardiomyopathy.

  7. Echocardiographic evaluation of patients with subacute sclerosing panencephalitis

    Directory of Open Access Journals (Sweden)

    Derya Çimen

    2014-03-01

    Full Text Available Objective: Subacute sclerosing panencephalitis is a slowly progressive, inflammatory and neurodegenerative disease caused by virus infection in the central nervous system. Since there are a limited number of studies in the literature evaluating the cardiovascular functions of patients with SSPE, the present study evaluates the patients with SSPE using tissue Doppler echocardiography and compares them between the control group in order to shed some light on the subject. Methods: The study is a prospective observational study. 49 patients (17 female, 32 male with SSPE were included in the study. Patients were divided into two groups: Stage 2 (n=29 and Stage 3 (n=20. Echocardiographic data were compared with a control group of 26 which is the same average age. All children underwent a detailed echocardiography, which contained an M-mode, pulse Doppler and tissue Doppler imaging. Results: Sinus tachycardia ( >100 beats/min in children was detected in nineteen (38.7% patients. There were not significant differences between parameters of systolic and diastolic function of the heart. Stage 2 group, EF: 69.9±6.4; SF: 39.2±5.58; and MPI (mitral: 0.38±0.03 and MPI (tricuspid: 0.39±0.10. And in the Stage 3 group, EF: 68.5±7.0, SF: 37.8±5.34, MPI (mitral: 0.37±0.09 and MPI (tricuspid: 0.38±0.12. In the control group EF:70.96±5.54; SF:39.96±5.05 and MPI(mitral: 0.35±0.06 MPI (tricuspid:0.36±0.04 and statistically meaningful differences were not found between patients and control groups (p >0.05. Conclusion: Cardiac functions may be preserved and cardiac functions constitute no significant risks of mortality in the advanced stages of patients with Subacute sclerosing panencephalitis, which is a group of chronic and bedridden patients.

  8. Estudo dopplerfluxométrico das artérias uterinas antes e após inserção do DIU Color doppler flow analysis of the uterine arteries before and after DIU insertion

    Directory of Open Access Journals (Sweden)

    Marco Aurélio Martins de Souza

    2004-06-01

    Full Text Available OBJETIVO: averiguar se ocorrem alterações nos parâmetros da dopplervelocimetria em usuárias do dispositivo intra-uterino (DIU T cobre 380, por meio do estudo das artérias uterinas antes e depois da inserção do DIU em mulheres lactantes e não lactantes. MÉTODOS: ensaio clínico prospectivo, analítico, com 100 pacientes, em que avaliamos à dopplervelocimetria: índice de resistência (IR, índice de pulsatilidade (IP e relação sístole/diástole (SD. As pacientes selecionadas foram submetidas à avaliação pré-inserção do DIU e a novos exames pós-inserção, realizados com 30 dias (um ciclo e com 90 dias (três ciclos. RESULTADOS: os valores obtidos nas artérias uterinas no grupo antes da inserção do DIU foram de 0,9 para o IR, de 2,4 para o IP e de 10,0 para a relação SD. Os valores 30 dias após a inserção do DIU foram de 0,9 para o IR, de 2,5 para o IP e de 10,7 para a relação SD. Após três ciclos aferimos um valor de 0,9 para o IR, de 2,5 para o IP e de 10,7 para a relação SD. A comparação dos resultados obtidos antes e depois da inserção do DIU mostrou valor p de 0,51 para o IR, de 0,37 para o IP e de 0,51 para a relação SD, demonstrando que após a inserção, não houve modificações significativas na dopplervelocimetria. CONCLUSÕES: o uso do DIU T cobre 380 não tem efeito nos índices de dopplervelocimetria das artérias uterinas tanto em pacientes amamentando ou não.OBJECTIVE: to observe if there is any alteration in the Dopplervelocimetry of the uterine arteries of nursing and not nursing women after the insertion of the copper T 380 intrauterine device (IUD. METHODS: prospective, analytical, self-paired clinical assay, with 100 patients in whom we evaluated the color doppler flow: resistance index (RI, pulsative index (PI and systole/diastole (SD ratio. Nursing and not nursing women were assessed before IUD insertion as well as 30 days (one cycle and 90 days (three cycles after the insertion

  9. P1033Echocardiographic predictive model of new-onset postoperative atrial fibrillation after abdominal surgery.

    Science.gov (United States)

    Demirevska, L; Gotchev, D

    2016-12-01

    and purpose: Postoperative atrial fibrillation (POAF) is a frequent complication post high-risk abdominal surgery in elderly patients. This study aimed to develop a predictive model of POAF based on preoperative transthoracic echocardiography (TTE) findings in these patients. We conducted a prospective study of 300 consecutive patients, age ≥ 65 years (mean age 72±6 years, 61% men), who underwent high-risk abdominal surgery under general anesthesia. Preoperative TTE was performed in all patients, including tissue Doppler imaging (TDI). We measured the time interval between the onset of the P-wave on ECG and a point of the peak-A wave on TDI from the lateral mitral annulus (PA lateral) and septal mitral annulus (PA septal). Left atrial (LA) dyssynchrony was measured by subtracting the PA septal from PA lateral. Right ventricular systolic pressure was estimated by using the tricuspid regurgitation jet (TRJ) Doppler velocity method. The primary endpoint was the occurance of new-onset POAF. Thirty-seven (12%) patients developed POAF. Multiple echocardiographic parameters were measured and tested in different combinations. The final model included the following variables with cutoff points predictive of POAF: PA lateral > 139 ms (69% sensitivity, 92% specificity), LA dyssynchrony > 35 ms (78% sensitivity, 89% specificity), and TRJ Doppler velocity >2.6 m/s (89% sensitivity, 64% specificity). A value of 0 was assigned when the result was below the cutoff point and a value of 1 if above the cutoff point. Coding of these three variables in the following order: PA lateral- TRJ Doppler- left atrial dyssynchrony can predict the probability of POAF. The model showed a postive predictive value of 79% and a negative predictive value of 95%. A model using three echocardiographic variables: PA lateral, LA dyssynchrony and TRJ Doppler velocity, can predict the incidence of POAF after high-risk abdominal surgery. The model can be used preoperatively to identify high-risk patients

  10. Tissue Doppler echocardiography predicts acute myocardial infarction, heart failure, and cardiovascular death in the general population

    DEFF Research Database (Denmark)

    Mogelvang, Rasmus; Biering-Sørensen, Tor; Jensen, Jan Skov

    2015-01-01

    with a normal conventional echocardiographic examination [per cm/s decrease: HR 1.18 (1.08-1.28), P factors, even......AIMS: To improve risk prediction of cardiovascular morbidity and mortality, we need sensitive markers of cardiac dysfunction; Echocardiographic Tissue Doppler Imaging (TDI) is feasible and harmless and may be ideal for this purpose. METHODS AND RESULTS: Within the community-based Copenhagen City...... Heart Study, 2064 participants were examined by echocardiography including TDI and followed (median 10.9 years) with regard to cardiovascular death, heart failure, or acute myocardial infarction (n = 277). Impaired systolic (s') and diastolic (e' and a') function according to age and sex as assessed...

  11. Reference intervals of echocardiographic measurements in healthy adult dairy goats.

    Directory of Open Access Journals (Sweden)

    Olga Szaluś-Jordanow

    Full Text Available To determine references intervals for echocardiographic measurements in adult dairy goats.125 clinically healthy, adult dairy goats aged 2-9 years, belonging to two breeds-Polish Fawn Improved (PFI, n = 64, weight range from 46 to 73, median of 58.5kg and Polish White Improved (PWI, n = 61, weight range from 48 to 80 kg, median of 67.9kg, closely related to French Alpine and Saanen, respectively.Non-invasive transthoracic echocardiography examination was performed in unsedated goats in a standing position. Two-dimensional, M-mode and pulsed wave Doppler measurements were obtained. A non-parametric method was applied for determination of reference intervals. Measurements for the two breeds were compared using an analysis of covariance to control for their body weight. Repeatability was assessed using a between-day coefficient of variation and a coefficient of repeatability.Following reference intervals were determined: aortic diameter in diastole 2.2-3.3, left atrial diameter in systole 2.5-4.3cm cm, the ratio of the left atrial diameter to the aortic diameter 0.96-1.5, right ventricular internal diameter in diastole 0.4-1.7cm, left ventricular internal diameter in systole and diastole 1.8-3.2 and 3.2-5.6 cm, respectively, inter-ventricular septum thickness in systole and diastole 0.7-1.5 and 0.5-1.1cm, respectively, left ventricular posterior-wall in systole and diastole 0.8-1.6 and 0.5-1.2cm, respectively, E-point to septal separation 0.3-0.8cm, left ventricular fractional shortening 28-54%, left ventricular ejection fraction 55-86%, maximum Left and Right Ventricular Outflow Tract velocity 80-140 cm/s and 70-130 cm/s, respectively Left and Right Ventricular Outflow Tract pressure gradient 2.5-8.9mmHg and 1.9-6.5mmHg, respectively. Most of the differences between the two breeds could be attributed to different body weight.The study provides echocardiographic reference intervals determined on the highest sample of apparently healthy goats so far

  12. Reference intervals of echocardiographic measurements in healthy adult dairy goats.

    Science.gov (United States)

    Szaluś-Jordanow, Olga; Czopowicz, Michał; Witkowski, Lucjan; Mickiewicz, Marcin; Frymus, Tadeusz; Markowska-Daniel, Iwona; Bagnicka, Emilia; Kaba, Jarosław

    2017-01-01

    To determine references intervals for echocardiographic measurements in adult dairy goats. 125 clinically healthy, adult dairy goats aged 2-9 years, belonging to two breeds-Polish Fawn Improved (PFI, n = 64, weight range from 46 to 73, median of 58.5kg) and Polish White Improved (PWI, n = 61, weight range from 48 to 80 kg, median of 67.9kg), closely related to French Alpine and Saanen, respectively. Non-invasive transthoracic echocardiography examination was performed in unsedated goats in a standing position. Two-dimensional, M-mode and pulsed wave Doppler measurements were obtained. A non-parametric method was applied for determination of reference intervals. Measurements for the two breeds were compared using an analysis of covariance to control for their body weight. Repeatability was assessed using a between-day coefficient of variation and a coefficient of repeatability. Following reference intervals were determined: aortic diameter in diastole 2.2-3.3, left atrial diameter in systole 2.5-4.3cm cm, the ratio of the left atrial diameter to the aortic diameter 0.96-1.5, right ventricular internal diameter in diastole 0.4-1.7cm, left ventricular internal diameter in systole and diastole 1.8-3.2 and 3.2-5.6 cm, respectively, inter-ventricular septum thickness in systole and diastole 0.7-1.5 and 0.5-1.1cm, respectively, left ventricular posterior-wall in systole and diastole 0.8-1.6 and 0.5-1.2cm, respectively, E-point to septal separation 0.3-0.8cm, left ventricular fractional shortening 28-54%, left ventricular ejection fraction 55-86%, maximum Left and Right Ventricular Outflow Tract velocity 80-140 cm/s and 70-130 cm/s, respectively Left and Right Ventricular Outflow Tract pressure gradient 2.5-8.9mmHg and 1.9-6.5mmHg, respectively. Most of the differences between the two breeds could be attributed to different body weight. The study provides echocardiographic reference intervals determined on the highest sample of apparently healthy goats so far enrolled.

  13. Improved septal contraction and coronary flow velocity after cardiac resynchronization therapy elucidated by strain imaging and pulsed wave Doppler echocardiography.

    Science.gov (United States)

    Kayano, Hiroyuki; Ueda, Hiroaki; Kawamata, Tomoaki; Miyoshi, Fumito; Toshida, Tsutomu; Watanabe, Norikazu; Hirano, Yuichi; Kawamura, Mitsuharu; Asano, Taku; Kou, Shyhaku; Tanno, Kaoru; Ozawa, Masaki; Kobayashi, Youichi; Katagiri, Takashi

    2006-02-01

    The effects of cardiac resynchronization therapy (CRT) with various atrioventricular conduction delay settings were investigated on cardiac hemodynamic changes involved in coronary flow velocity using color and pulsed wave Doppler modalities and myocardial regional contractility using a novel echocardiographic technique (strain imaging). Seven patients with advanced heart failure (left ventricular ejection fraction or = 140 msec) were treated with CRT. Color and pulsed wave Doppler imaging were performed from the apical four-chamber view to examine the cardiac functions such as stroke volume, cardiac output, mitral regurgitant volume and coronary flow velocity. Strain imaging was performed to quantify the asynchrony of both intraventricular and interventricular time delay between the septum and left ventricular free wall (posterior wall) and to assess the regional contractile function. Wall motion was also evaluated. Intraventricular and interventricular asynchrony were improved from 173 +/- 18 to 60 +/- 6 msec, and 69 +/- 25 to 12 +/- 3 msec, respectively. Stroke volume (55.2 +/- 6.2 to 76.8 +/- 10.8 ml; 39% up), cardiac output (3.9 +/- 0.3 to 5.4 +/- 0.5 I/min; 38% up) and coronary flow velocity (24 +/- 3 to 36 +/- 5 cm/sec; 50% up) were greatly increased and mitral regurgitant volume (59.7 +/- 18.0 to 38.9 +/- 11.3 ml; 35% down)was clearly decreased. Septal wall shortening was greatly increased from 10.2 +/- 2.3% to 17.0 +/- 1.8% and septal wall motion (radial thickening)was also improved simultaneously. Atrioventricular interval settings influenced all above parameters. CRT improved the cardiac hemodynamics involved in coronary flow significantly due to both resynchronization of inter and intra asynchrony, and improvement of the regional myocardial contraction in patients with severe congestive heart failure and complete left bundle branch block.

  14. Doppler angle correction in the measurement of intrarenal parameters

    Directory of Open Access Journals (Sweden)

    Mennitt K

    2011-03-01

    Full Text Available Jing Gao¹, Keith Hentel¹, Qiang Zhu², Teng Ma², George Shih¹, Kevin Mennitt¹, Robert Min¹¹Department of Radiology, New York Presbyterian Hospital, Weill Cornell Medical College, NY, USA; ²Division of Diagnostic Ultrasound, Department of Radiology, Beijing Tongren Hospital, Capital Medical University, Beijing, ChinaBackground: The aim of this study was to assess differences in intrarenal artery Doppler parameters measured without and with Doppler angle correction.Methods: We retrospectively reviewed color duplex sonography in 30 normally functioning kidneys (20 native kidneys in 10 subjects and 10 transplanted kidneys in 10 subjects performed between January 26, 2010 and July 26, 2010. There were 10 age-matched men and10 age-matched women (mean 39.8 ± 12.2, range 21–60 years in this study. Depending on whether the Doppler angle was corrected in the spectral Doppler measurement, Doppler parameters including peak systolic velocity (PSV, end-diastolic velocity (EDV, and resistive index (RI measured at the interlobar artery of the kidney were divided into two groups, ie, initial Doppler parameters measured without Doppler angle correction (Group 1 and remeasured Doppler parameters with Doppler angle correction (Group 2. Values for PSV, EDV, and RI measured without Doppler angle correction were compared with those measured with Doppler angle correction, and were analyzed statistically with a paired-samples t-test.Results: There were statistical differences in PSV and EDV at the interlobar artery in the upper, mid, and lower poles of the kidney between Group 1 and Group 2 (all P < 0.001. PSV and EDV in Group 1 were significantly lower than in Group 2. RI in Group 1 was the same as that in Group 2 in the upper, mid, and lower poles of the kidneys.Conclusion: Doppler angle correction plays an important role in the accurate measurement of intrarenal blood flow velocity. The true flow velocity converted from the maximum Doppler velocity shift

  15. Simpson's Method of Discs for Measurement of Echocardiographic End?Diastolic and End?Systolic Left Ventricular Volumes: Breed?Specific Reference Ranges in Boxer Dogs

    OpenAIRE

    Smets, P.; Daminet, S.; Wess, G

    2013-01-01

    Background Boxer dogs are predisposed to congenital and adult onset cardiac diseases. Breed?specific reference values for M?mode and Doppler echocardiographic measurements previously have been established. Left ventricular (LV) end?systolic (ESV) and end?diastolic volumes (EDV) can be measured by M?mode or two?dimensional methods, such as Simpson's method of discs (SMOD). Reference ranges for SMOD?derived LV volumes are lacking. Objectives To determine reference intervals for EDV and ESV in B...

  16. Diagnóstico ecocardiográfico de los tumores primarios del corazón en el feto Echocardiographic diagnosis of fetal primary heart tumors

    Directory of Open Access Journals (Sweden)

    Andrés Savío Benavides

    2009-12-01

    Full Text Available INTRODUCCIÓN. Se describen las características ecocardiográficas de los tumores cardíacos primarios en el feto y la evolución y complicaciones de éstos, con el propósito de analizar su comportamiento en dos períodos diferentes a lo largo de 20 años. MÉTODOS. El estudio se desarrolló en dos etapas. En la primera se estudiaron 1,884 embarazadas entre las 18 y 22 semanas de gestación, que acudieron a la consulta por distintos factores de riesgo obstétrico. La técnica utilizada fue la misma empleada internacionalmente, con equipos Combison 320-5 y Aloka 860 con transductores electrónicos de 3,5 y 5 MHz, y Doppler codificado en color, para el estudio de los flujos intracavitarios y los gradientes de presión. RESULTADOS. Se identificaron 6 tumores cardíacos, lo que representó el 0,3 % de los casos examinados. Cinco correspondieron a rabdomiomas, y uno, a un mixoma de la aurícula derecha. La mayoría obstruía los tractos de entrada o salida. Se observó arritmia en un caso. La sensibilidad y especificidad fueron del 100 % y 99,8 %, respectivamente. CONCLUSIONES. Se demuestra la poca frecuencia de los tumores cardíacos en el feto y la importancia de la ecocardiografía por su alta sensibilidad y especificidad.INTRODUCTION: Echocardiographic features of fetal primary heart tumors are described, as well as its natural history and its complications to analyze its behavior during two different periods along 20 years. METHODS: Study was developed in two stages. In the first one a total of 1,884 pregnants between 18 and 22 gestational weeks were studied who were seen in consultation due to different obstetric risk factors. The technique applied was similar to that at worldwide using a equipment Combison 320-5 and Aloka 860 and electronic transducers of 3,5 and 5 MHz, and color coded Doppler to study the intracavitary flux and the pressure gradient. RESULTS: Six cardiac tumors were identified representing the 0,3% of study cases. Five were

  17. Echocardiographic study of left atrial myxoma

    Directory of Open Access Journals (Sweden)

    Dalal J

    1979-01-01

    Full Text Available Four cases of left atrial myxoma were diagnosed pre-operatively by echocardiography. All cases showed characteristic echocardio-graphic features of variegated shadows behind the mitral valve in diastole and within the left atrium in systole. In two cases the my-xomas were surgically removed and confirmed on histology. In one case the post-operative echocardiogram showed complete dis-appearance of the abnormal shadows. Echocardiography is the most reliable method today for the diagnosis of a myxoma.

  18. Cardiac Time Intervals by Tissue Doppler Imaging M-Mode

    DEFF Research Database (Denmark)

    Biering-Sørensen, Tor; Mogelvang, Rasmus; de Knegt, Martina Chantal

    2016-01-01

    PURPOSE: To define normal values of the cardiac time intervals obtained by tissue Doppler imaging (TDI) M-mode through the mitral valve (MV). Furthermore, to evaluate the association of the myocardial performance index (MPI) obtained by TDI M-mode (MPITDI) and the conventional method of obtaining...... MPI (MPIConv), with established echocardiographic and invasive measures of systolic and diastolic function. METHODS: In a large community based population study (n = 974), where all are free of any cardiovascular disease and cardiovascular risk factors, cardiac time intervals, including isovolumic...... the MPITDI and MPIConv measured. RESULTS: IVRT, IVRT/ET and MPI all increased significantly with increasing age in both genders (pcardiac function. MPITDI...

  19. Echocardiographic screening results in patients with tuberous sclerosis complex.

    NARCIS (Netherlands)

    Adriaensen, M.E.; Cramer, M.J.; Brouha, M.E.; Schaefer-Prokop, C.M.; Prokop, M.; Doevendans, P.A.; Zonnenberg, B.A.; Feringa, H.H.

    2010-01-01

    We sought to examine the frequency of abnormal echocardiographic findings in patients with tuberous sclerosis complex. In a retrospective cohort study, we included all patients with known tuberous sclerosis complex who had been sent to our cardiology department for echocardiographic screening from

  20. Echocardiographic patterns of juvenile rheumatic heart disease at ...

    African Journals Online (AJOL)

    Objective: To describe the echocardiographic features of children with rheumatic heart disease seen at the Kenyatta National Hospital. Design: A retrospective study. Setting: The Kenyatta National Hospital Heart Unit. Subjects: Patients aged 20 years and less with echocardiographic diagnosis of rheumatic heart disease.

  1. The "atrial dancing": echocardiographic diagnosis of electrocardiographic query.

    Science.gov (United States)

    Siniscalchi, Carmine; Gaibazzi, Nicola

    2015-09-14

    The direct observation of the cardiac structure through the echocardiographic exam offers, in some cases, the advantage to resolve difficult diagnostic definition. In this paradigmatic case we emphasize as an accurate observation of the echocardiographic figures and movies can resolve also an electrocardiographic query.

  2. Ebstein's Anomaly: Anatomo-echocardiographic correlation

    Directory of Open Access Journals (Sweden)

    Keirns Candace

    2007-11-01

    Full Text Available Abstract Objective The aim of this investigation is to demonstrate that in Ebstein's Anomaly (EA the right ventricle (RV is affected in its three portions and to establish an anatomoechocardiographic correlation between the anatomic features and the equivalent echocardiographic images. Methods Thirty hearts with EA were studied. The alterations of each portions of the RV were described. Fifty adult patients with this anomaly were studied by echocardiography. Results Anatomy: All hearts had atrial situs solitus, 27 had concordant atrioventricular connection and 3 discordant, of these 2 had transposition of the great arteries (TGA and one double outlet right ventricle (DORV. The degree of tricuspid valve (TV displacement showed a spectrum from I to III. The inlet of the RV was markedly thin in 27. The trabecular portion had multiples muscular bands in all. The outlet portion was dilated in 20 and stenotic in 5. In 25 atrial septal defects were found. Echocardiography: All patients had atrial situs solitus, 42 with concordant atrioventricular connection and 8 with discordant, of these last patients 5 had TGA and 3 DORV. The degree of TV displacement varied from I to III. The inlet of RV was markedly thin in 42. The trabecular portion had muscular bands in 45. The outlet portion was dilated in 31 and stenotic in 11. In 30 atrial septal defects were found. Conclusion The EA affects the whole RV and the anatomoechocardiographic correlation provides an appropriate understanding of echocardiographic images in terms of a precise diagnosis, therapeutic decisions and prognosis.

  3. Advances in Doppler OCT

    Science.gov (United States)

    Liu, Gangjun; Chen, Zhongping

    2014-01-01

    We review the principle and some recent applications of Doppler optical coherence tomography (OCT). The advances of the phase-resolved Doppler OCT method are described. Functional OCT algorithms which are based on an extension of the phase-resolved scheme are also introduced. Recent applications of Doppler OCT for quantification of flow, imaging of microvasculature and vocal fold vibration, and optical coherence elastography are briefly discussed. PMID:24443649

  4. Doppler flowmetry in preeclampsia.

    Science.gov (United States)

    Zahumensky, J

    2009-01-01

    The purpose of this study was to summarize the new published data on the Doppler flowmetry in preeclampsia. We summarize the new published data on the Doppler flowmetry in uteroplacental, fetoplacental and fetal circulation in preeclampsia. The present review summarized the results of clinical research on the Doppler flowmetry in the screening of risk of preclampsia, in the diagnosis of preclampsia and in the fetal risk in preclampsia (Ref. 19). Full Text (Free, PDF) www.bmj.sk.

  5. [Echocardiographic indices of the right heart in patients with coronary artery disease in different age groups].

    Science.gov (United States)

    Gajfulin, R A; Sumin, A N; Arhipov, O G

    2016-01-01

    The aim of study was to examine echocardiographic indices of right heart chambers in patients with coronary artery disease in different age groups. On 678 patients aged 38-85 years, who underwent echocardiography, are including with the use of spectral tissue Doppler. Obtained 2 age groups: 1st - patients up to 60 years (n=282) and group 2nd - patients 60 years and older (n=396). In the analysis the obtained results in patients with coronary heart disease in older age groups showed an increase in right ventricular wall thickness, systolic and average pressure in the pulmonary artery. These changes were accompanied by deterioration in left ventricular diastolic function, while the systolic function of the left and right ventricle were independent of age. Thus, the results can be recommended for assessment of right ventricular dysfunction in patients of older age groups.

  6. Changes in Mitral Annular Ascent with Worsening Echocardiographic Parameters of Left Ventricular Diastolic Function

    Directory of Open Access Journals (Sweden)

    Paula M. Hernández Burgos

    2016-01-01

    Full Text Available Background. While the mitral annular plane systolic excursion (MAPSE has been suggested as a surrogate measurement of left ventricular ejection fraction, less is known about the relative value of mitral annular ascent (MAa. Methods. Our database was queried for complete transthoracic echocardiograms performed for any clinical indication. Baseline echocardiographic measurements were compared to determine any correlation between MAa and traditional Echo-Doppler echocardiographic measures to characterize left ventricular diastolic dysfunction (LVDD. Results. Patients with normal LV diastolic function were younger (41±13 years than patients with LVDD (stage 1: 61±13 years; stage 2: 57±14 years; and stage 3: 66±17 years; p=0.156. LV ejection fraction decreased in patients with stage 2 LVDD (63±17% and was further reduced in patients with stage 3 LVDD (28±21; p=0.003. Discussion. While a vigorous MAa excursion was seen in patients with stage 1 LVDD, MAa significantly decreased in stage 2 and stage 3 LVDD patients. Our results highlight the importance of atrioventricular coupling, as MAa motion seems to reflect changes in left atrial pressure. Additional studies are now required to better examine atrioventricular interactions and electromechanical coupling that might improve our assessment of LV diastolic function.

  7. Características cinefluoroscópicas de cinco modelos de prótesis mecánicas monovalvas implantadas en la República Argentina: su valor complementario al ecocardiograma Doppler color

    Directory of Open Access Journals (Sweden)

    Horacio A. Prezioso

    2008-01-01

    Full Text Available La variedad de modelos de prótesis valvulares mecánicas es amplia y su reconocimiento por ecocardiografía es difícil. La cinefluoroscopia (CF puede complementar su identificación y su evaluación.Objetivos1 Describir las características cinefluoroscópicas de cada prótesis para su identificación. 2 Evaluar su función a través de la comparación de los gradientes del eco-Doppler con el ángulo de apertura del disco en la CF. 3 Reconocer la capacidad de la CF para diferenciar prótesis normales de disfuncionantes.Material y métodosSe evaluaron prospectivamente 94 prótesis (53 aórticas y 41 mitrales con ecocardiograma Doppler y cinefluoroscopia.ResultadosCon la CF se logró identificar el 100% de las prótesis. La movilidad de los discos diferenció prótesis normales de disfuncionantes. Según el eco-Doppler, 22 prótesis aórticas y 21 mitrales estudiadas eran normales.La sensibilidad y la especificidad de la fluoroscopia para diferenciar prótesis normales de disfuncionantes fue del 90% y del 81%, respectivamente.Conclusiones1 Mediante la CF se puede identificar cada modelo de prótesis monodisco. 2 La CF permite distinguir entre una prótesis normal y una disfuncionante. 3 La CF es superior al eco- Doppler para evaluar la movilidad de los discos, mientras que el ecocardiograma Doppler permite medir gradientes y áreas y semicuantificar regurgitaciones, por lo que ambos métodos deben considerarse complementarios.

  8. The duplex-Doppler colour echography of the scrotum and testicles in adults and boys. II. the contribution of the urgent study of acute scrotum symptoms; Ecografia duples-Doppler color del escroto y el testiculo en el adulto y el nino. II. Aportacion al estudio urgente del escroto agudo

    Energy Technology Data Exchange (ETDEWEB)

    Rangel-Villalobos, E.; Jimenez-Castellanos, R.; Bustos, C.; Linares, A.; Gonzalez-Prada, F. [Hospital Universitario Virgen Macarena. Sevilla (Spain)

    1999-07-01

    To analyse the findings, contributions and limitations of the Doppler echography for the urgent study of acute scrotum symptoms, both in adults and in boys. 60 patients (22 adults and 38 boys) with acute scrotal symptomatology were examined using B mode echography, followed by a colour duplex-Doppler (CDD) echography with a lineal 7.5 MHz transducer. We compared the findings obtained with those of the healthy contralateral testicle and with surgery or clinical-echographical evolution. The most common pathology was inflammation (27%) followed by ischemic (24%) and traumatic (17%). 12% of the patients had miscellaneous conditions. To conclude, in 20% of the cases the B mode and the Doppler examination was normal, the symptoms were resolved spontaneously. After carrying out the CDD only 14 (23%) of the cases needed immediate surgery and 3 (5%) delayed surgery, the remaining 43 (72%) patients responded to the traditional treatment. The CDD allows for a safe, quick and harmless diagnosis in practically all the acute scrotum cases, for both adults and boys. Its limitations in pre-puberty patients or in cases that were atypical are overcome when put in the hands of an expert radiologist, as they need a longer exploration time and suitable Doppler equipment. The main contribution to the urgent diagnosis of acute scrotum symptoms is that it accurately establishes which patients should be chosen for immediate surgery. (Author) 33 refs.

  9. Tendinopathy and Doppler activity

    DEFF Research Database (Denmark)

    Boesen, M I; Koenig, M J; Torp-Pedersen, S

    2006-01-01

    Intratendinous Doppler activity has been interpreted as an equivalent of neovessels in the Achilles tendon and as a sign of tendinosis (AT).......Intratendinous Doppler activity has been interpreted as an equivalent of neovessels in the Achilles tendon and as a sign of tendinosis (AT)....

  10. The Doppler Effect

    OpenAIRE

    Riedel, Adric

    2014-01-01

    This presentation of 7 animations demonstrates the Doppler effect, which is used by astronomers to learn about the motions of stars, and to find planets.  The principle is simple - in fact, even the animations consist only of expanding circles - but the effect is impressive.   http://starguyspeaks.wordpress.com/2014/10/12/on-the-doppler-effect/

  11. Echocardiographic evaluation of Space Shuttle crewmembers

    Science.gov (United States)

    Bungo, M. W.; Goldwater, D. J.; Popp, R. L.; Sandler, H.

    1987-01-01

    Echocardiographic measurements of left ventricular volume were obtained from 17 members of four Space Shuttle crews before and after 5- to 8-day space flights. Measurements obtained 1 h after landing indicated increases in the heart rate (HR), mean arterial pressure, and systemic vascular resistance values. On the other hand, the end-diastolic volume index (EDVI) fell 17 ml/sq m, and the stroke volume index (SVI) fell 15 ml/sq m. Measurements taken 1-2 weeks later demonstrated that the HR values returned to normal, but the EDVI and SVI values remained significantly below preflight levels, despite the ability of the subjects to ambulate and exercise. The results indicate that a space flight induces significant changes in heart volume affecting the left-ventricle function. It is suggested that the prolonged recovery period is related to the high level of aerobic conditioning in these subjects.

  12. Ultrasonic colour Doppler imaging

    DEFF Research Database (Denmark)

    Evans, David H.; Jensen, Jørgen Arendt; Nielsen, Michael Bachmann

    2011-01-01

    Ultrasonic colour Doppler is an imaging technique that combines anatomical information derived using ultrasonic pulse-echo techniques with velocity information derived using ultrasonic Doppler techniques to generate colour-coded maps of tissue velocity superimposed on grey-scale images of tissue...... anatomy. The most common use of the technique is to image the movement of blood through the heart, arteries and veins, but it may also be used to image the motion of solid tissues such as the heart walls. Colour Doppler imaging is now provided on almost all commercial ultrasound machines, and has been...... vectors. This review briefly introduces the principles behind colour Doppler imaging and describes some clinical applications. It then describes the basic components of conventional colour Doppler systems and the methods used to derive velocity information from the ultrasound signal. Next, a number of new...

  13. Differential doppler heterodyning technique

    DEFF Research Database (Denmark)

    Lading, Lars

    1971-01-01

    Measuring velocity without disturbing the moving object is possible by use of the laser doppler heterodyning technique. Theoretical considerations on the doppler shift show that the antenna property of the photodetector can solve an apparent conflict between two different ways of calculating...... the detected doppler frequency. It is found that the doppler frequency for this particular setup is independent of the direction of detection. Investigations of the signal-to-noise ratio (SNR) show that the maximum SNR-considering the optical setup-is obtained by measuring the frequency difference between two...... doppler-shifted beams rather than by measuring the shift of a single beam by comparing it with a reference beam. Measurements seem to be in agreement with the theoretical consideration...

  14. Interobserver agreement on the echocardiographic parameters that estimate right ventricular systolic function in the early postoperative period of cardiac surgery.

    Science.gov (United States)

    Olmos-Temois, S G; Santos-Martínez, L E; Álvarez-Álvarez, R; Gutiérrez-Delgado, L G; Baranda-Tovar, F M

    2016-11-01

    To know the variability of transthoracic echocardiographic parameters that assess right ventricular systolic function by analyzing interobserver agreement in the early postoperative period of cardiovascular surgery. To assess the feasibility of these echocardiographic measurements. A cross-sectional study, double-blind pilot study was carried out from May 2011 to February 2013. Cardiovascular postoperative critical care at the National Institute of Cardiology "Ignacio Chávez", Mexico City, Mexico. Consecutive, non-probabilistic sampling. Fifty-six patients were studied in the postoperative period of cardiac surgery. The first echocardiographic parameters were obtained between 6-8hours after cardiac surgery, followed by blinded second measurements. Tricuspid annular plane systolic excursion (TAPSE), tricuspid annular peak systolic velocity on tissue Doppler imaging (VSPAT), diameters and right ventricular outflow area, tract fractional shortening. The agreement was analyzed by the Bland-Altman method, and its magnitude was assessed by the intraclass correlation coefficient (95% confidence interval). Both observers evaluated TAPSE and VSPAT in 48 patients (92%). The average TAPSE was 11.68±4.53mm (range 4-27mm). Right ventricular systolic dysfunction was observed in 41 cases (85%) and normal TAPSE in 7 patients (15%). The average difference and its limits according to TAPSE were -0.917±2.95 (-6.821, 4.988), with a magnitude of 0.725 (0.552, 0.837); the tricuspid annular peak systolic velocity on tissue Doppler imaging was -0.001±0.015 (-0.031, 0.030), and its magnitude 0.825 (0.708, 0.898), respectively. VSPAT and TAPSE were estimated by both observers in 92% of the patients, these parameters exhibiting the lowest interobserver variability. Copyright © 2016 Elsevier España, S.L.U. y SEMICYUC. All rights reserved.

  15. Hypercholesterolemia and Myocardial function evaluated via Tissue Doppler Imaging

    Directory of Open Access Journals (Sweden)

    Kotaru Pavan

    2009-11-01

    Full Text Available Abstract Objective To establish a link between hypercholesterolemia and myocardial dysfunction. Background Heart failure is a complex disease involving changes in systolic and diastolic function. Newer echocardiographic imaging modalities may be able to detect discreet changes in myocardial function associated with hypercholesterolemia. Therefore we sought to establish a link between hypercholesterolemia and myocardial dysfunction with tissue Doppler imaging (TDI. Methods Twenty-seven rabbits were studied: 7 were fed normal chow (group 1 and 20 a high cholesterol diet (10 with ezetimibe, 1 mg/kg/day; group 2 and 10 without, group 3. Echocardiographic images were obtained under general anesthesia. Serum cholesterol levels were obtained at baseline, 3 and 6 months and myocardial cholesterol levels measured following euthanasia. Results Doppler measurements, including E/A, E'/A' and S' were significantly lower in group 3 compared to both groups 1 and 2 but no significant differences were noted in chamber sizes or ejection fraction among the groups. Average serum cholesterol was higher in group 3 compared to groups 1 and 2 respectively (495 ± 305 mg/dl vs. 114 ± 95 mg/dl and 87 ± 37 mg/dl; p 2 = 0.17 p = 0.04, r2 = 0.37 p = 0.001 and r2 = 0.24 p = 0.01. Conclusion Cholesterol load in the serum and myocardium was significantly associated with decreased systolic and diastolic function by TDI. Moreover, lipid lowering was protective.

  16. Color-induced graph colorings

    CERN Document Server

    Zhang, Ping

    2015-01-01

    A comprehensive treatment of color-induced graph colorings is presented in this book, emphasizing vertex colorings induced by edge colorings. The coloring concepts described in this book depend not only on the property required of the initial edge coloring and the kind of objects serving as colors, but also on the property demanded of the vertex coloring produced. For each edge coloring introduced, background for the concept is provided, followed by a presentation of results and open questions dealing with this topic. While the edge colorings discussed can be either proper or unrestricted, the resulting vertex colorings are either proper colorings or rainbow colorings. This gives rise to a discussion of irregular colorings, strong colorings, modular colorings, edge-graceful colorings, twin edge colorings and binomial colorings. Since many of the concepts described in this book are relatively recent, the audience for this book is primarily mathematicians interested in learning some new areas of graph colorings...

  17. The duplex-Doppler colour echography of the scrotum and testicles in adults and boys. III. Assessment of chronic scrotal pathology; Ecografia duplex-Doppler color del escroto y el testiculo en el adulto y el nino. III. Valoracion de la patologia escrotal cronica

    Energy Technology Data Exchange (ETDEWEB)

    Rangel-Villalobos, E.; Benjumeda, A.; Jimenez-Castellanos, R.; Linares, A.; Blanco, A [Hospital Universitario Virgen Macarena. Sevilla (Spain)

    1999-07-01

    To show the most outstanding findings from the chronic scrotal pathology of adults and boys, determining the benefits of the Doppler echography in the diagnostical valuation of the different cases analysed. 40 patients (19 adults and 21 boys) with chronic scrotal symptomatology were examined using a B mode echography followed by a colour duplex-Doppler (CDD) echography with a lineal 7.5 MHz transducer. We compared the findings obtained with those corresponding to the contralateral testicle and, depending on the pathology, we co-related them with surgery, pathologic anatomy or clinical-echograph evolution. The pathology found was very varied, it was distributed into: varicoceles (12), testicle tumours (9), extra-testicle tumours (4) and miscellaneous pathology (13). Two patients showed no changes, currently remaining asymptomatic. The treatment was surgical in 28 (70%) of the patients and traditional in the others. The B mode echography played a fundamental role in the diagnosis of chronic scrotal pathology, which in the majority of the cases was definitive, being completed with the application of the Doppler echograph to analyse the vascular condition of the lesions and the anatomical structures. The diagnosis utility of the CDD echograph in chronic scrotal pathology is controversial, it is not specific for testicle tumors, it is very useful for variocele and complementary, tp the B mode echograph for miscellaneous pathology. (Author) 31 refs.

  18. Echocardiographic Screening Results in Patients with Tuberous Sclerosis Complex

    Science.gov (United States)

    Adriaensen, Miraude E.A.P.M.; Cramer, Maarten J.M.; Brouha, Madelon E.E.; Schaefer-Prokop, Cornelia M.; Prokop, Mathias; Doevendans, Pieter A.F.M.; Zonnenberg, Bernard A.; Feringa, Harm H.H.

    2010-01-01

    We sought to examine the frequency of abnormal echocardiographic findings in patients with tuberous sclerosis complex. In a retrospective cohort study, we included all patients with known tuberous sclerosis complex who had been sent to our cardiology department for echocardiographic screening from 1995 through August 2003 (n=56). Two research scientists independently reviewed the reports of the echocardiographic screening examinations for abnormal findings. We used descriptive statistics, the Mann-Whitney U test, and the χ2 test. The mean age of patients included in the study was 35 years (range, 12–73 yr); 23 patients were male. Abnormal findings were seen in 22 patients (39%). The most common abnormal findings were focal areas of increased intramyocardial echogenicity, which were seen in 16 patients (29%). The clinical consequence of this finding is still unknown. We conclude that echocardiographic abnormalities are common in patients with tuberous sclerosis complex. PMID:20548802

  19. Echocardiographic predictors of atrial fibrillation after mitral valve replacement

    Directory of Open Access Journals (Sweden)

    Al-Shimaa Mohamed Sabry

    2017-12-01

    Conclusion: LA systolic strain and LV global longitudinal strain were significant predictors of POAF. Echocardiographic parameters can identify patients at greater risk of developing POAF who can benefit from preventive measure and guide the selection of prosthesis.

  20. Pulsed Doppler echocardiographic evaluation of the blood stream in children with morphological heart lesion

    NARCIS (Netherlands)

    J.C. Areias (José)

    1982-01-01

    textabstractEchocardiography is well estabished as a valuable method for detecting specific lesions and is useful for obtaining information which is helpful in the management of many patients with congenital and acquired abnormalities of the heart and great vessels (1-9). However, conventional

  1. Clinical and Echocardiographic Predictors of Mortality in Chagasic Cardiomyopathy - Systematic Review

    Science.gov (United States)

    Pereira, Clodoval de Barros; Markman, Brivaldo

    2014-01-01

    Diagnosis, prognosis and evaluation of death risk in Chagas cardiomyopathy still constitute a challenge due to the diversity of manifestations, which determine the importance of using echocardiography, tissue Doppler and biomarkers. To evaluate, within a systematic review, clinical and echocardiographic profiles of patients with chronic chagasic cardiomyopathy, which may be related to worse prognosis and major mortality risk. To perform the systematic review, we used Medline (via PubMed), LILACS and SciELO databases to identify 82 articles published from 1991 to 2012, with the following descriptors: echocardiography, mortality and Chagas disease. We selected 31 original articles, involving diagnostic and prognostic methods. The importance of Chagas disease has increased due to its emergence in Europe and United States, but most evidence came from Brazil. Among the predictors of worse prognosis and higher mortality risk are morphological and functional alterations in the left and right ventricles, evaluated by conventional echocardiography and tissue Doppler, as well as the increase in brain natriuretic peptide and troponin I concentrations. Recently, the evaluations of dyssynchrony, dysautonomia, as well as strain, strain rate and myocardial twisting were added to the diagnostic arsenal for the early differentiation of Chagas cardiomyopathy. Developments in imaging and biochemical diagnostic procedures have enabled more detailed cardiac evaluations, which demonstrate the early involvement of both ventricles, allowing a more accurate assessment of the mortality risk in Chagas disease. PMID:25004422

  2. Clinical and echocardiographic predictors of mortality in chagasic cardiomyopathy - systematic review

    Directory of Open Access Journals (Sweden)

    Clodoval de Barros Pereira Júnior

    2014-07-01

    Full Text Available Diagnosis, prognosis and evaluation of death risk in Chagas cardiomyopathy still constitute a challenge due to the diversity of manifestations, which determine the importance of using echocardiography, tissue Doppler and biomarkers. To evaluate, within a systematic review, clinical and echocardiographic profiles of patients with chronic chagasic cardiomyopathy, which may be related to worse prognosis and major mortality risk. To perform the systematic review, we used Medline (via PubMed, LILACS and SciELO databases to identify 82 articles published from 1991 to 2012, with the following descriptors: echocardiography, mortality and Chagas disease. We selected 31 original articles, involving diagnostic and prognostic methods. The importance of Chagas disease has increased due to its emergence in Europe and United States, but most evidence came from Brazil. Among the predictors of worse prognosis and higher mortality risk are morphological and functional alterations in the left and right ventricles, evaluated by conventional echocardiography and tissue Doppler, as well as the increase in brain natriuretic peptide and troponin I concentrations. Recently, the evaluations of dyssynchrony, dysautonomia, as well as strain, strain rate and myocardial twisting were added to the diagnostic arsenal for the early differentiation of Chagas cardiomyopathy. Developments in imaging and biochemical diagnostic procedures have enabled more detailed cardiac evaluations, which demonstrate the early involvement of both ventricles, allowing a more accurate assessment of the mortality risk in Chagas disease.

  3. Clinical and echocardiographic predictors of mortality in chagasic cardiomyopathy--systematic review.

    Science.gov (United States)

    Pereira Júnior, Clodoval de Barros; Markman Filho, Brivaldo

    2014-06-01

    Diagnosis, prognosis and evaluation of death risk in Chagas cardiomyopathy still constitute a challenge due to the diversity of manifestations, which determine the importance of using echocardiography, tissue Doppler and biomarkers. To evaluate, within a systematic review, clinical and echocardiographic profiles of patients with chronic chagasic cardiomyopathy, which may be related to worse prognosis and major mortality risk. To perform the systematic review, we used Medline (via PubMed), LILACS and SciELO databases to identify 82 articles published from 1991 to 2012, with the following descriptors: echocardiography, mortality and Chagas disease. We selected 31 original articles, involving diagnostic and prognostic methods. The importance of Chagas disease has increased due to its emergence in Europe and United States, but most evidence came from Brazil. Among the predictors of worse prognosis and higher mortality risk are morphological and functional alterations in the left and right ventricles, evaluated by conventional echocardiography and tissue Doppler, as well as the increase in brain natriuretic peptide and troponin I concentrations. Recently, the evaluations of dyssynchrony, dysautonomia, as well as strain, strain rate and myocardial twisting were added to the diagnostic arsenal for the early differentiation of Chagas cardiomyopathy. Developments in imaging and biochemical diagnostic procedures have enabled more detailed cardiac evaluations, which demonstrate the early involvement of both ventricles, allowing a more accurate assessment of the mortality risk in Chagas disease.

  4. Echocardiographic Finding in Anabolic Steroids Abuser Athletics

    Directory of Open Access Journals (Sweden)

    B. Haji Moradi

    2006-01-01

    Full Text Available Introduction & Objective: Abuse of anabolic steroids in body builders and competitive sports (doping is common and prevalent in our country. Due to disagreement about cardiovascular side effects of these drugs and existing controversy in published articles, this study was designed to evaluate the echocardiographic finding in athletics who are current user of these drugs. Materials & Methods: Body builders with continues sport for preceding year and at least twice weekly selected and divided into steroid abuser and not abuser and compared with age and BMI matched non athletic healthy volunteers .Results: There was not significant difference in age, body mass index, ejection fraction, ventricular compliance and valve function between three groups. But diastolic size of septum and free wall is significantly thicker in both of athletics in comparison with non athletic volunteer but observed differences were only significant (Pvalue = 0.05 between first and third group. The difference between the above mentioned index was not significant between two groups of athleticConclusion: Observed differences in diastolic size of septum and free wall between first and third group and also absence of difference between two athletic groups is in favor of that long term abuse of anabolic steroid (more than one year results in augmentation of physiologic hypertrophy due to isometric exercise. Furthermore long term abuse and supra pharmacologic dose does not have significant effect in size and left ventricular function.

  5. Color Blindness

    Science.gov (United States)

    ... rose in full bloom. If you have a color vision defect, you may see these colors differently than most people. There are three main kinds of color vision defects. Red-green color vision defects are the most ...

  6. M-mode echocardiographic reference values in Pantja goats

    Directory of Open Access Journals (Sweden)

    Parul Singh

    2017-01-01

    Full Text Available Aim: The aim of this study was to establish M-mode echocardiographic reference values in Pantja goats and to study the effect of gender and body weight (BW on these parameters. Materials and Methods: A total of 18, clinically healthy, adult Pantja goats of either sex, aged 2-4 years and weighing 10-44 kg were included in the study. Echocardiographic examination was performed in the standing unsedated animal. All measurements were made from the right parasternal long-axis left ventricular outflow tract view of the heart. The following parameters were recorded: Left ventricular internal diameter at diastole and systole, interventricular septal thickness at diastole and systole, left ventricular posterior wall (LVPW thickness at diastole and systole, end diastolic and systolic volumes, stroke volume, fractional shortening, ejection fraction, percent systolic thickening of interventricular septum, percent systolic thickening of LVPW, cardiac output, left atrial (LA diameter at diastole and systole, aortic (AO root diameter at diastole and systole, LA/AO, LA posterior wall thickness at diastole and systole, left ventricular ejection time, DE amplitude, EF slope, AC interval and e-point to septal separation. Results: This study demonstrated specific reference ranges of M-mode echocardiographic parameters and indices in healthy Pantja goats. Normal echocardiographic values obtained in Pantja goats were quite different from other goat breeds. Gender had no influence on echocardiographic parameters, while high correlations were found between most echocardiographic parameters and BW. Conclusion: The echocardiographic values obtained in the study may serve as a reference for future studies in this breed, for cardiovascular disease diagnosis and for utilizing the goat as a model for cardiac disorders in humans.

  7. Diagnostic sensitivity and specificity of Doppler ultrasound in rheumatoid arthritis

    DEFF Research Database (Denmark)

    Terslev, L.; Recke, P. von der; Torp-Pedersen, S.

    2008-01-01

    Objective. To evaluate the sensitivity and specificity of Doppler ultrasound (DUS) in diagnosing arthritis in the wrist and hands, and, if possible, to define a cutoff level for our ultrasound measures for inflammation, resistive index (RI), and color fraction. Methods. Using DUS, 88 patients...

  8. Suture granuloma after orchiectomy: sonography, doppler and elastography features

    Directory of Open Access Journals (Sweden)

    Mustafa Secil

    2015-08-01

    Full Text Available ABSTRACTSuture granuloma is a mass forming benign lesion that develops at the site of surgery as a foreign body reaction to non-absorbable suture material. We present a case of suture granuloma that developed at the inguinal region after orchiectomy, and define the sonography, color Doppler sonography and real-time ultrasound elastography findings in correlation with the histopathological findings.

  9. Use of Doppler ultrasound for non-invasive urodynamic diagnosis

    Directory of Open Access Journals (Sweden)

    Hideo Ozawa

    2009-01-01

    Full Text Available Objectives: A totally non-invasive transperineal urodynamic technique using Doppler ultrasonography has been developed. Methods: Since normal urine does not have blood cells, urine was thought not to produce the Doppler effects. However, basic studies confirmed that the decrease of pressure at high velocity (Bernouilli effect caused dissolved gas to form microbubbles, which are detected by Doppler ultrasonography. Subjects sat and the probe was advanced via remote control to achieve gentle contact with the perineal skin. The digital uroflow data signals and the color Doppler ultrasound video images were processed on a personal computer. The flow-velocity curves from two sites; the distal prostatic urethra just above the external sphincter (V1 and the sphincteric urethra (V2 were plotted against time. The parameters of both the pressure-flow studies and the Doppler ultrasound urodynamic studies were compared in men who had various degrees of obstruction. Results: Functional cross-sectional area at prostatic urethra (A1, calculated by Q max /V1, was lower in the group of bladder outlet obstruction (BOO vs. control group. Velocity ratio (VR, which was calculated by V1/V2, was the parameter having the best correlation with BOO index, though A1 had a similar correlation. This method is viable to diagnose the degree of BOO. Conclusions: The development of non-invasive Doppler ultrasound videourodynamics (Doppler UDS will dramatically expand the information on voiding function.

  10. Ultrasonic colour Doppler imaging

    DEFF Research Database (Denmark)

    Evans, David H; Jensen, Jørgen Arendt; Nielsen, Michael Bachmann

    2011-01-01

    anatomy. The most common use of the technique is to image the movement of blood through the heart, arteries and veins, but it may also be used to image the motion of solid tissues such as the heart walls. Colour Doppler imaging is now provided on almost all commercial ultrasound machines, and has been...... vectors. This review briefly introduces the principles behind colour Doppler imaging and describes some clinical applications. It then describes the basic components of conventional colour Doppler systems and the methods used to derive velocity information from the ultrasound signal. Next, a number of new...... techniques that seek to overcome the vector problem mentioned above are described. Finally, some examples of vector velocity images are presented....

  11. Intraoperative echocardiographic detection of regurgitant jets after valve replacement

    Science.gov (United States)

    Morehead, A. J.; Firstenberg, M. S.; Shiota, T.; Qin, J.; Armstrong, G.; Cosgrove, D. M. 3rd; Thomas, J. D.

    2000-01-01

    BACKGROUND: Paravalvular jets, documented by intraoperative transesophageal echocardiography, have prompted immediate valve explantation by others, yet the significance of these jets is unknown. METHODS: Twenty-seven patients had intraoperative transesophageal two-dimensional color Doppler echocardiography, performed to assess the number and area of regurgitant jets after valve replacement, before and after protamine. Patients were grouped by first time versus redo operation, valve position and type. RESULTS: Before protamine, 55 jets were identified (2.04+/-1.4 per patient) versus 29 jets after (1.07+/-1.2 per patient, p = 0.0002). Total jet area improved from 2.0+/-2.2 cm2 to 0.86+/-1.7 cm2 with protamine (p0.6). Furthermore, mitral and mechanical valves each had more jets and overall greater jet area when compared to aortic and tissue valves, respectively. CONCLUSIONS: Following valve replacement, multiple jets are detected by intraoperative transesophageal echocardiography. They are more common and larger in the mitral position and with mechanical valves. Improvement occurs with reversal of anticoagulation.

  12. Doppler ultrasonography of the lower extremity arteries: anatomy and scanning guidelines

    Directory of Open Access Journals (Sweden)

    Ji Young Hwang

    2017-04-01

    Full Text Available Doppler ultrasonography of the lower extremity arteries is a valuable technique, although it is less frequently indicated for peripheral arterial disease than for deep vein thrombosis or varicose veins. Ultrasonography can diagnose stenosis through the direct visualization of plaques and through the analysis of the Doppler waveforms in stenotic and poststenotic arteries. To perform Doppler ultrasonography of the lower extremity arteries, the operator should be familiar with the arterial anatomy of the lower extremities, basic scanning techniques, and the parameters used in color and pulsed-wave Doppler ultrasonography.

  13. Doppler ultrasonography of the lower extremity arteries: anatomy and scanning guidelines

    Energy Technology Data Exchange (ETDEWEB)

    Hwang, Ji Young [Dept. of Radiology, Ewha Womans University School of Medicine, Seoul (Korea, Republic of)

    2017-04-15

    Doppler ultrasonography of the lower extremity arteries is a valuable technique, although it is less frequently indicated for peripheral arterial disease than for deep vein thrombosis or varicose veins. Ultrasonography can diagnose stenosis through the direct visualization of plaques and through the analysis of the Doppler waveforms in stenotic and poststenotic arteries. To perform Doppler ultrasonography of the lower extremity arteries, the operator should be familiar with the arterial anatomy of the lower extremities, basic scanning techniques, and the parameters used in color and pulsed-wave Doppler ultrasonography.

  14. Doppler radar physiological sensing

    CERN Document Server

    Lubecke, Victor M; Droitcour, Amy D; Park, Byung-Kwon; Singh, Aditya

    2016-01-01

    Presents a comprehensive description of the theory and practical implementation of Doppler radar-based physiological monitoring. This book includes an overview of current physiological monitoring techniques and explains the fundamental technology used in remote non-contact monitoring methods. Basic radio wave propagation and radar principles are introduced along with the fundamentals of physiological motion and measurement. Specific design and implementation considerations for physiological monitoring radar systems are then discussed in detail. The authors address current research and commercial development of Doppler radar based physiological monitoring for healthcare and other applications.

  15. Pulse Doppler radar

    CERN Document Server

    Alabaster, Clive

    2012-01-01

    This book is a practitioner's guide to all aspects of pulse Doppler radar. It concentrates on airborne military radar systems since they are the most used, most complex, and most interesting of the pulse Doppler radars; however, ground-based and non-military systems are also included. It covers the fundamental science, signal processing, hardware issues, systems design and case studies of typical systems. It will be a useful resource for engineers of all types (hardware, software and systems), academics, post-graduate students, scientists in radar and radar electronic warfare sectors and milit

  16. Evaluation of canine congenital heart disease using an echocardiographic algorithm.

    Science.gov (United States)

    Oyama, M A; Sisson, D D

    2001-01-01

    Evaluation of canine congenital heart disease presents a diagnostic challenge to many ultrasonographers. To assist clinicians attempting to examine these patients, an echocardiographic algorithm containing the six most common canine congenital heart diseases (i.e., patent ductus arteriosus, subaortic stenosis, pulmonic stenosis, ventricular septal defect, tricuspid dysplasia, and tetralogy of Fallot) is presented. The algorithm focuses on the underlying disease pathogenesis and the resultant changes in cardiac structure and function that can be readily identified during echocardiographic examination. Use of this algorithm provides a framework from which the ultrasonographer gains both experience and confidence in diagnosing congenital heart disease via echocardiography. This algorithm is supported by a number of still figures within the article as well as real-time echocardiographic images available for viewing at AAHA's website, www.aahanet.org.

  17. Dizziness, headachepatients with transcranial color doppler (TCD) detectionresults and The Application of value analysis%头晕、头痛患者彩色经颅多普勒(TCD)检测结果与应用价值分析

    Institute of Scientific and Technical Information of China (English)

    唐蜜

    2014-01-01

    Objective:To study the patients with dizziness , headache transcranial color doppler ( TCD) examination results and the ap-plication of the clinical diagnosis value .Methods:From January 2009 to December 2011 to our center complained of dizziness or head-ache, no obvious nervous system positioning and signs of 195 cases of patients, taking transcranial color doppler (TCD) hemodynamic de-tection, including the bilateral common carotid artery (CCA), external carotid artery (ECA), internal carotid artery (ICA) and middle cerebral artery (MCA), before the cerebral artery (ACA), posterior cerebral artery (PCA), vertebral artery (VA) and basilar artery ( BA) direction of blood flow velocity and pulse index , spectrum shape , abnormal audio detection , etc.Results:195 patients with dizzi-ness, headache, 81(41.54﹪) cases of the rapid blood flow, slow blood flow velocity in 63 cases (32.31﹪), on both sides of the same name artery blood flow velocity asymmetry 20 cases (10.26﹪);Headache to higher blood flow velocity and on both sides of the same name artery blood flow velocity asymmetry was given priority to , dizziness was given priority to with artery blood flow velocity slowed;Youth was given priority to with blood flow increased , in the elderly group was given priority to with slow blood flow .Conclusion:Transcra-nial color doppler ( TCD) could have diagnostic value on imaging examination is difficult to get dizzy headache to provide reliable diagnos -tic basis.%目的:探讨头晕、头痛患者彩色经颅多普勒( TCD)检查结果与临床诊断中的应用价值。方法:对2009年1月~2011年12月来我中心就诊主诉为头晕或头痛,且无明显神经系统定位体征的患者195例,进行彩色经颅多普勒( TCD)血流动力学检测,包括双侧颈总动脉(CCA)、颈外动脉(ECA)、颈内动脉(ICA)、大脑中动脉(MCA)、大脑前动脉(ACA)、大脑后动脉(PCA)、椎动脉( VA

  18. Echocardiographic evaluation of ventricular septal defect haemodynamics

    Directory of Open Access Journals (Sweden)

    Miranović Vesna

    2007-01-01

    Full Text Available Introduction Ventricular septal defect (VSD is an opening in the interventricular septum. 30-50% of patients with congenital heart disease have VSD. Objective The aim of the study was to determine the dependence of the left ventricular diastolic dimension (LVD, left ventricular systolic dimension (LVS, shortening fraction (SF, left atrium (LA, pulmonary artery truncus (TPA on the body surface and compare their values among experimental, control and a group of healthy children. Values of maximal systolic gradient pressure (Pvsd of VSD were compared with children from one experimental and control group. Method Children were divided into three groups: experimental (32 children with VSD that were to go to surgery, control (20 children with VSD who did not require surgery and 40 healthy children. Measurements of LVD, LVS, SF, LA, TPA were performed in accordance to recommendations of the American Echocardiographic Association. The value of Pvsd was calculated from the maximal flow velocity (V in VSD using the following formula: Pvsd=4xVІ (mm Hg. Results For children from the experimental group, the relationship between the body surface and the variability of the LVD was explained with 56.85%, LVS with 66.15%, SF with 4.9%, TPA with 58.92%. For children from the control group, the relationship between the body surface and the variability of LVD was explained with 88.8%, LVS with 72.5%, SF with 0.42%, PA with 58.92%. For healthy children, the relationship between the body surface and the variabilitiy of the LVD was explained with 88.8%, LVS with 88.78%, SF with 5.25% and PA with 84.75%. There was a significant statistical difference between average values of Pvsd in the experimental and control group (p<0.02. Conclusion The presence of the large VSD has an influence on the enlargement of LVD, LVS, SF, TPA. The enlargement of the size of the pulmonary artery depends on the presence of VSD and there is a direct variation in the magnitude of the shunt

  19. Echocardiographic evaluation of pre-diagnostic development in young relatives genetically predisposed to hypertrophic cardiomyopathy

    DEFF Research Database (Denmark)

    Jensen, Morten K; Havndrup, Ole; Christiansen, Michael

    2015-01-01

    Identification of the first echocardiographic manifestations of hypertrophic cardiomyopathy may be important for clinical management and our understanding of the pathogenesis. We studied the development of pre-diagnostic echocardiographic changes in young relatives to HCM patients during long...

  20. Evaluación de la ecografía en escala de grises con técnica doppler color como estudio control inicial de los pacientes trasplantados hepáticos: correlación con los hallazgos imaginológicos, quirúrgicos y clínicos

    Directory of Open Access Journals (Sweden)

    Tatiana Suárez Poveda

    2008-02-01

    Full Text Available

     

    OBJETIVO: comparar los hallazgos por ecografía en escala de grises con técnica doppler color en pacientes con trasplante de hígado con los de otras modalidades de diagnóstico imaginológico, los resultados quirúrgicos y el seguimiento clínico durante los tres meses posteriores al trasplante, evaluando las complicaciones vasculares y no vasculares.

    MATERIALES Y MÉTODOS: en forma retrospectiva, cubriendo el período de 12 meses comprendidos entre enero de 2005 y enero de 2006, se estudiaron los reportes digitales de las ecografías en escala de grises con técnica doppler color realizadas a los pacientes trasplantados hepáticos durante las 72 horas posteriores al trasplante, según el protocolo del Grupo de Trasplantes del Hospital Universitario San Vicente de Paúl y la Universidad de Antioquia, Medellín, Colombia, hechas por radiólogos expertos con un equipo de alta tecnología. Se desea evaluar las complicaciones vasculares y no vasculares que se presentaron durante los tres meses posteriores al trasplante. Los hallazgos en la ecografía en escala de grises con técnica doppler se compararon con los resultados, también digitales, de otros estudios de diagnóstico por imágenes realizados en la evolución posterior como seguimiento o control; igualmente se revisaron las historias clínicas con el fin de disponer de los reportes de los hallazgos intraoperatorios y de la evolución clínica durante los tres meses siguientes al trasplante.

  1. Echocardiographic Assessment of Preload Responsiveness in Critically Ill Patients

    Directory of Open Access Journals (Sweden)

    Alexander Levitov

    2012-01-01

    Full Text Available Fluid challenges are considered the cornerstone of resuscitation in critically ill patients. However, clinical studies have demonstrated that only about 50% of hemodynamically unstable patients are volume responsive. Furthermore, increasing evidence suggests that excess fluid resuscitation is associated with increased mortality. It therefore becomes vital to assess a patient's fluid responsiveness prior to embarking on fluid loading. Static pressure (CVP, PAOP and echocardiographic (IVC diameter, LVEDA parameters fails to predict volume responsiveness. However, a number of dynamic echocardiographic parameters which are based on changes in vena-caval dimensions or cardiac function induce by positive pressure ventilation or passive leg raising appear to be highly predictive of volume responsiveness.

  2. Scanning laser Doppler vibrometry

    DEFF Research Database (Denmark)

    Brøns, Marie; Thomsen, Jon Juel

    With a Scanning Laser Doppler Vibrometer (SLDV) a vibrating surface is automatically scanned over predefined grid points, and data processed for displaying vibration properties like mode shapes, natural frequencies, damping ratios, and operational deflection shapes. Our SLDV – a PSV-500H from...

  3. Adaptive Spectral Doppler Estimation

    DEFF Research Database (Denmark)

    Gran, Fredrik; Jakobsson, Andreas; Jensen, Jørgen Arendt

    2009-01-01

    In this paper, 2 adaptive spectral estimation techniques are analyzed for spectral Doppler ultrasound. The purpose is to minimize the observation window needed to estimate the spectrogram to provide a better temporal resolution and gain more flexibility when designing the data acquisition sequence...

  4. The Doppler Pendulum Experiment

    Science.gov (United States)

    Lee, C. K.; Wong, H. K.

    2011-01-01

    An experiment to verify the Doppler effect of sound waves is described. An ultrasonic source is mounted at the end of a simple pendulum. As the pendulum swings, the rapid change of frequency can be recorded by a stationary receiver using a simple frequency-to-voltage converter. The experimental results are in close agreement with the Doppler…

  5. Tissue Doppler echocardiography reveals impaired cardiac function in patients with reversible ischaemia

    DEFF Research Database (Denmark)

    Hoffmann, Søren; Mogelvang, Rasmus; Sogaard, Peter

    2011-01-01

    velocities could be demonstrated in patients with a false-positive SPECT compared with controls. CONCLUSION: In patients with stable angina pectoris, preserved ejection fraction, and reversible ischaemia assessed by SPECT, echocardiographic colour TDI performed at rest reveals impaired cardiac function......AIMS: To determine if echocardiographic tissue Doppler imaging (TDI) performed at rest detects reduced myocardial function in patients with reversible ischaemia. METHODS AND RESULTS: Eighty-four patients with angina pectoris, no previous history of ischaemic heart disease and normal left...... ventricular ejection fraction were examined with colour TDI, single-photon emission computed tomography (SPECT), and coronary angiography (CAG). Patients with a normal SPECT (n= 42) constituted the control group and patients with a positive SPECT (n= 42) were divided into patients with (true-positive SPECT, n...

  6. Echocardiographic Techniques of Deformation Imaging in the Evaluation of Maternal Cardiovascular System in Patients with Complicated Pregnancies

    Directory of Open Access Journals (Sweden)

    Silvia Visentin

    2017-01-01

    Full Text Available Cardiovascular diseases (CVD represent the leading cause of maternal mortality and morbidity. Knowledge of CVD in women is constantly evolving and data are emerging that female-specific risk factors as complications of pregnancy are conditions associated with an increased risk for the long-term development of CVD. Echocardiography is a safe and effective imaging technique indicated in symptomatic or asymptomatic pregnant women with congenital heart diseases who require close monitoring of cardiac function. Deformation imaging is an echocardiographic technique used to assess myocardial function by measuring the actual deformation of the myocardium through the cardiac cycle. Speckle-tracking echocardiography (STE is a two-dimensional (2D technique which has been found to be more accurate than tissue Doppler to assess both left ventricular (LV and right ventricular (RV myocardial function. The use of 2D STE however might present some technical issues due to the tomographic nature of the technique and the motion in the three-dimensional space of the myocardial speckles. This has promoted the use of 3D STE to track the motion of the speckles in the 3D space. This review will focus on the clinical value of the new echocardiographic techniques of deformation imaging used to assess the maternal cardiovascular system in complicated pregnancies.

  7. Echocardiographic Techniques of Deformation Imaging in the Evaluation of Maternal Cardiovascular System in Patients with Complicated Pregnancies.

    Science.gov (United States)

    Visentin, Silvia; Palermo, Chiara; Camerin, Martina; Daliento, Luciano; Muraru, Denisa; Cosmi, Erich; Badano, Luigi P

    2017-01-01

    Cardiovascular diseases (CVD) represent the leading cause of maternal mortality and morbidity. Knowledge of CVD in women is constantly evolving and data are emerging that female-specific risk factors as complications of pregnancy are conditions associated with an increased risk for the long-term development of CVD. Echocardiography is a safe and effective imaging technique indicated in symptomatic or asymptomatic pregnant women with congenital heart diseases who require close monitoring of cardiac function. Deformation imaging is an echocardiographic technique used to assess myocardial function by measuring the actual deformation of the myocardium through the cardiac cycle. Speckle-tracking echocardiography (STE) is a two-dimensional (2D) technique which has been found to be more accurate than tissue Doppler to assess both left ventricular (LV) and right ventricular (RV) myocardial function. The use of 2D STE however might present some technical issues due to the tomographic nature of the technique and the motion in the three-dimensional space of the myocardial speckles. This has promoted the use of 3D STE to track the motion of the speckles in the 3D space. This review will focus on the clinical value of the new echocardiographic techniques of deformation imaging used to assess the maternal cardiovascular system in complicated pregnancies.

  8. Right ventricular diastolic performance in children with pulmonary arterial hypertension associated with congenital heart disease: correlation of echocardiographic parameters with invasive reference standards by high-fidelity micromanometer catheter.

    Science.gov (United States)

    Okumura, Kenichi; Slorach, Cameron; Mroczek, Dariusz; Dragulescu, Andreea; Mertens, Luc; Redington, Andrew N; Friedberg, Mark K

    2014-05-01

    Right ventricular diastolic dysfunction influences outcomes in pulmonary arterial hypertension (PAH), but echocardiographic parameters have not been investigated in relation to invasive reference standards in pediatric PAH. We investigated echocardiographic parameters of right ventricular diastolic function in children with PAH in relation to simultaneously measured invasive reference measures. We prospectively recruited children undergoing a clinically indicated cardiac catheterization for evaluation of PAH and pulmonary vasoreactivity testing. Echocardiography was performed simultaneously with invasive reference measurements by high-fidelity micromanometer catheter. For analysis, patients were divided into shunt and nonshunt groups. Sixteen children were studied. In the group as a whole, significant correlations were found among τ and tricuspid deceleration time, E', E/E', TimeE-E', A wave velocity, and global early and late diastolic strain rate. dp/dt minimum correlated significantly with late diastolic tricuspid annular velocity (A'), tissue Doppler imaging-derived systolic:diastolic duration ratio, and global late diastolic strain rate. End-diastolic pressure correlated significantly with tissue Doppler imaging-derived systolic:diastolic duration ratio. On multivariate analysis, tricuspid deceleration time, TimeE-E', and global early diastolic strain rate were independent predictors of τ, whereas tissue Doppler imaging-derived systolic:diastolic duration ratio was an independent predictor of dp/dt minimum. In general, correlations between echocardiographic and invasive parameters were better in the shunt group than in the nonshunt group. Echocardiography correlates with invasive reference measures of right ventricular diastolic function in children with PAH, although it does not differentiate between early versus late diastolic abnormalities. Newer echocardiographic techniques may have added value to assess right ventricular diastolic dysfunction in this

  9. Echocardiographic Evidence of Early Diastolic Dysfunction in Asymptomatic Children with Osteogenesis Imperfecta

    Directory of Open Access Journals (Sweden)

    Khalfan S. Al-Senaidi

    2015-11-01

    Full Text Available Objectives: Structural and functional cardiovascular abnormalities have been reported in adults with osteogenesis imperfecta (OI; however, there is a lack of paediatric literature on this topic. This study aimed to investigate cardiovascular abnormalities in children with OI in comparison to a control group. Methods: This case-control study was conducted at the Sultan Qaboos University Hospital in Muscat, Oman, between May 2013 and August 2014. Data from eight patients with OI and 24 healthy controls were compared using conventional and tissue Doppler echocardiography (TDE. Results: The OI group had significantly lower peak early mitral valve flow velocity (P = 0.027, peak a-wave reversal in the pulmonary vein (P = 0.030 and peak early diastolic velocity of the mitral valve and upper septum (P = 0.001 each. The peak late diastolic velocities of the mitral valve (P = 0.002 and the upper septum (P = 0.037 were significantly higher in the OI group; however, the peak early/late diastolic velocity ratios of the mitral valve (P = 0.002 and upper septum (P = 0.001 were significantly lower. Left ventricular dimensions and aortic and pulmonary artery diameters were larger in the OI group when indexed for body surface area. Both groups had normal systolic cardiac function. Conclusion: Children with OI had normal systolic cardiac function. However, changes in myocardial tissue Doppler velocities were suggestive of early diastolic cardiac dysfunction. They also had increased left ventricular dimensions and greater vessel diameters. These findings indicate the need for early and detailed structural and functional echocardiographic assessment and follow-up of young patients with OI.

  10. Mitral valve repair: an echocardiographic review: Part 2.

    Science.gov (United States)

    Maslow, Andrew

    2015-04-01

    Echocardiographic imaging of the mitral valve before and immediately after repair is crucial to the immediate and long-term outcome. Prior to mitral valve repair, echocardiographic imaging helps determine the feasibility and method of repair. After the repair, echocardiographic imaging displays the new baseline anatomy, assesses function, and determines whether or not further management is necessary. Three-dimensional imaging has improved the assessment of the mitral valve and facilitates communication with the surgeon by providing the surgeon with an image that he/she might see upon opening up the atrium. Further advancements in imaging will continue to improve the understanding of the function and dysfunction of the mitral valve both before and after repair. This information will improve treatment options, timing of invasive therapies, and advancements of repair techniques to yield better short- and long-term patient outcomes. The purpose of this review was to connect the echocardiographic evaluation with the surgical procedure. Bridging the pre- and post-CPB imaging with the surgical procedure allows a greater understanding of mitral valve repair.

  11. New reference values for echocardiographic dimensions of healthy Dutch children.

    NARCIS (Netherlands)

    Overbeek, L.I.H.; Kapusta, L.; Peer, P.G.M.; Korte, C.L. de; Thijssen, J.M.; Daniëls, O.

    2006-01-01

    AIM: To renew the echocardiographic reference values of heart dimensions in healthy children. METHODS AND RESULTS: Group 1 consisted of 587 children, of which 361 boys and 226 girls, age from birth to 18 years, body weight over 2500 g, who visited the Pediatric Cardiology outclinic during the period

  12. Effect of haematocrit on echocardiographic indices of cardiac ...

    African Journals Online (AJOL)

    Background: Several mechanisms have been put forward to explain myocardial dysfunction in sickle cell anaemia. Aims and objectives: This study was aimed at examining the effect of haematocrit parameters on echocardiographic indices of cardiac dimension in adult sickle cell anaemia patients. Methods: A descriptive ...

  13. Childhood acquired heart disease in Nigeria: an echocardiographic ...

    African Journals Online (AJOL)

    Introduction: Acquired heart diseases (AHD) are not uncommon in children. The current multi-center study aims to provide a more representative data of AHD in Nigeria. Methods: Over 42 months, children referred for echocardiographic evaluation who had confirmed AHD in three centers in Nigeria were recruited. The data ...

  14. Clinical and echocardiographic features of children with rheumatic ...

    African Journals Online (AJOL)

    Clinical and echocardiographic features of children with rheumatic carditis: correlation with high sensitivity C-reactive protein. ... Mitral regurgitation (MR) was found in 65 patients (98%), it was severe in 42 patients (64%), combined with aortic regurgitation (AR) in 27 patients (41%) and with Mitral stenosis (MS) in 3 patients ...

  15. Intravenous carbon dioxide as an echocardiographic contrast agent

    NARCIS (Netherlands)

    R.S. Meltzer (Richard); P.W.J.C. Serruys (Patrick); P.G. Hugenholtz (Paul); J.R.T.C. Roelandt (Jos)

    1981-01-01

    textabstractIntravenous carbon dioxide (CO2) was employed to cause echocardiographic contrast in 40 patients. One to 3 cc of medically pure CO2 were agitated with 5 to 8 cc of 5% dextrose in water and rapidly injected into an upper extremity vein. Contrast was obtained in all patients. In 33

  16. ECHOCARDIOGRAPHIC PARAMETERS IN ATHLETES OF DIFFERENT SPORTS

    Directory of Open Access Journals (Sweden)

    Tomas Venckunas

    2008-03-01

    Full Text Available Competitive athletics is often associated with moderate left ventricular (LV hypertrophy, and it has been hypothesized that training mode and type of exercise modulates long-term cardiac adaptation. The purpose of the study was to compare cardiac structure and function among athletes of various sports and sedentary controls. Standard transthoracic two-dimensional M-mode and Doppler echocardiography was performed at rest in Caucasian male canoe/kayak paddlers (n = 9, long distance runners (LDR, n = 18, middle distance runners (MDR, n = 17, basketball players (BP, n = 31, road cyclists (n = 8, swimmers (n = 10, strength/power athletes (n = 9 of similar age (range, 15 to 31 yrs, training experience (4 to 9 years, and age-matched healthy male sedentary controls (n = 15. Absolute interventricular septum (IVS thickness and LV wall thickness, but not LV diameter, were greater in athletes than sedentary controls. Left ventricular mass of all athletes but relative wall thickness of only BP, swimmers, cyclists, and strength/power athletes were higher as compared with controls (p < 0.05. Among athletes, smaller IVS thickness was observed in MDR than BP, cyclists, swimmers or strength/power athletes, while LDR had higher body size-adjusted LV diameter as compared to BP, cyclists and strength/power athletes. In conclusion, relative LV diameter was increased in long distance runners as compared with basketball players, cyclists, and strength/power athletes. Basketball, road cycling, strength/power, and swimming training were associated with increased LV concentricity as compared with paddling or distance running

  17. The assessment of cardiac functions by tissue Doppler-derived myocardial performance index in patients with Behcet's disease.

    Science.gov (United States)

    Tavil, Yusuf; Ozturk, Mehmet Akif; Sen, Nihat; Kaya, Mehmet Gungor; Hizal, Fatma; Poyraz, Fatih; Turfan, Murat; Onder, Meltem; Gurer, Mehmet Ali; Cengel, Atiye

    2008-03-01

    Vascular involvement is one of the major characteristics of Behcet's disease (BD). However, there are controversial findings regarding cardiac involvement in BD. Although early reports demonstrated that there is diastolic dysfunction in BD, conflicting results were found in the following trials. Hence, a new method for more objectively estimating the cardiac functions is needed. For this aim, we used high-usefulness tissue Doppler echocardiography for detailed analysis of cardiac changes in BD patients because this method was superior to other conventional echocardiographic techniques. The study population included 42 patients with BD (19 men, 23 women; mean age, 35 +/- 10 years, mean disease duration, 2.7 +/- 1.6 years) and 30 healthy subjects (14 men, 16 women; mean age, 38 +/- 7 years). Cardiac functions were determined using echocardiography, comprising standard two-dimensional and conventional Doppler and tissue Doppler imaging (TDI). Peak systolic myocardial velocity at mitral annulus, early diastolic mitral annular velocity (Em), late diastolic mitral annular velocity (Am), Em/Am, and myocardial performance index (MPI) were calculated by TDI. The conventional echocardiographic parameters and tissue Doppler measurements were similar between the groups. Tissue Doppler derived mitral relaxation time was longer (75 +/- 13 vs 63 +/- 16 msn, p = 0.021) in patients with BD. There was statistically significant difference between the two groups regarding left ventricular MPI (0.458 +/- 0.072 vs 0.416 +/- 0.068%, p = 0.016), which were calculated from tissue Doppler systolic time intervals. There was also significant correlation between the disease duration and MPI (r = 0.38, p = 0.017). We have demonstrated that tissue Doppler-derived myocardial left ventricular relaxation time and MPI were impaired in BD patients, although systolic and diastolic function parameters were comparable in the patients and controls.

  18. Doppler ultrasound exam of an arm or leg

    Science.gov (United States)

    ... related deaths are caused by cardiovascular problems, not lung cancer. Alternative Names Peripheral vascular disease - Doppler; PVD - Doppler; PAD - Doppler; Blockage of leg arteries - Doppler; Intermittent claudication - Doppler; Arterial insufficiency of the legs - Doppler; Leg pain and cramping - ...

  19. Laser Doppler anemometry

    Science.gov (United States)

    Johnson, Dennis A.

    1988-01-01

    The material in this NASA TM is to appear as a chapter on Laser Doppler Anemometry (LDA) in the AGARDograph entitled, A Survey of Measurements and Measuring Techniques in Rapidly Distorted Compressible Turbulent Boundary Layers. The application of LDA (specifically, the dual-beam, burst-counter approach) to compressible flows is discussed. Subjects treated include signal processing, particle light scattering and tracking, data reduction and sampling bias, and three-dimensional measurements.

  20. Echocardiographic evaluation of right ventricular systolic function: The traditional and innovative approach.

    Science.gov (United States)

    Smolarek, Dorota; Gruchała, Marcin; Sobiczewski, Wojciech

    2017-01-01

    Estimation of right ventricular (RV) performance still remains technically challenging due to its anatomical and functional distinctiveness. The current guidelines for the echocardiographic quantification of RV function recommend using multiple indices to describe the RV in a thorough and comprehensive manner, such as RV index of myocardial performance, tricuspid annular plane systolic excursion, fractional area change, Doppler tissue imaging-derived tricuspid lateral annular systolic velocity (S'-wave), three-dimensional RV ejection fraction (3D RVEF), RV longitudinal strain (RVLS)/strain rate by speckle- tracking echocardiography (STE). Among these, the last one mentioned here is an innovative and a particularly promising tool that yields more precise information about complex regional and global RV mechanics. STE was initially designed to evaluate left ventricular function, but recently it has been introduced to assess RV performance, which is difficult due to its unique structure and physiology. Many studies have shown that both free wall and 6-segment RVLS present a stronger correlation with the RVEF assessed by cardiac magnetic resonance than conventional parameters and seem to be more sensitive in detecting myocardial dysfunction at an earlier, subclinical stage.

  1. Doppler Optical Coherence Tomography

    Science.gov (United States)

    Leitgeb, Rainer A.; Werkmeister, René M.; Blatter, Cedric; Schmetterer, Leopold

    2014-01-01

    Optical Coherence Tomography (OCT) has revolutionized ophthalmology. Since its introduction in the early 1990s it has continuously improved in terms of speed, resolution and sensitivity. The technique has also seen a variety of extensions aiming to assess functional aspects of the tissue in addition to morphology. One of these approaches is Doppler OCT (DOCT), which aims to visualize and quantify blood flow. Such extensions were already implemented in time domain systems, but have gained importance with the introduction of Fourier domain OCT. Nowadays phase-sensitive detection techniques are most widely used to extract blood velocity and blood flow from tissues. A common problem with the technique is that the Doppler angle is not known and several approaches have been realized to obtain absolute velocity and flow data from the retina. Additional studies are required to elucidate which of these techniques is most promising. In the recent years, however, several groups have shown that data can be obtained with high validity and reproducibility. In addition, several groups have published values for total retinal blood flow. Another promising application relates to non-invasive angiography. As compared to standard techniques such as fluorescein and indocyanine-green angiography the technique offers two major advantages: no dye is required and depth resolution is required is provided. As such Doppler OCT has the potential to improve our abilities to diagnose and monitor ocular vascular diseases. PMID:24704352

  2. Contrast microsphere enhancement of the tricuspid regurgitant spectral Doppler signal - Is it still necessary with contemporary scanners?

    Science.gov (United States)

    Platts, David G; Vaishnav, Manan; Burstow, Darryl J; Craig, Christian Hamilton; Chan, Jonathan; Sedgwick, John L; Scalia, Gregory M

    2017-12-01

    Accurate evaluation of the tricuspid regurgitant (TR) spectral Doppler signal is important during transthoracic echocardiographic (TTE) evaluation for pulmonary hypertension (PHT). Contrast enhancement improves Doppler backscatter. However, its incremental benefit with contemporary scanners is less well established. The aim of this study was to assess whether the TR spectral Doppler signal using contemporary scanners was improved using a second generation contrast agent, Definity® (CE), compared to unenhanced TTE (UE). Analysis of patients who underwent UE then CE TR interrogation was performed. TR signal was evaluated by an experienced reader and graded 1 (clear-high level of confidence of interpretation and complete spectral Doppler envelope), 2 (suboptimal with medium-low level of confidence of interpretation and incomplete envelope), 3 (poor-absent and no measurable spectral Doppler signal). Maximal TR velocity (TRV) was defined as peak velocity that could be clearly identified. An inexperienced sonographer read 30 randomly selected studies. 176 TTE were performed in 173 patients (mean age 57 ± 14.8 years). Wilcoxon signed rank test demonstrated significant improvement (p Doppler signal quality with CE TTE. Mean score CE TTE vs. TTE = 2.32 ± 0.85 vs. 2.56 ± 0.75 respectively (p Doppler signals or greater than mild tricuspid regurgitation.

  3. Doppler ultrasound screening predicts recurrence of poor pregnancy outcome in subsequent pregnancies, but not the recurrence of PIH or preeclampsia

    NARCIS (Netherlands)

    Aardema, MW; Lander, M; De Wolf, BTHM; Aarnoudse, JG; Oosterhof, H.

    2000-01-01

    Objective: To assess the role of Doppler uterine artery screening in the prediction of recurring hypertensive disorders in a high-risk population. Methods: Ninety-four women with a history of hypertensive disorders in previous pregnancies underwent ultrasound color Doppler to analyze blood flow in

  4. The effect of dead elements on the accuracy of Doppler ultrasound measurements.

    Science.gov (United States)

    Vachutka, Jaromir; Dolezal, Ladislav; Kollmann, Christian; Klein, Jakob

    2014-01-01

    The objective of this study is to investigate the effect of multiple dead elements in an ultrasound probe on the accuracy of Doppler ultrasound measurements. For this work, we used a specially designed ultrasound imaging system, the Ultrasonix Sonix RP, that provides the user with the ability to disable selected elements in the probe. Using fully functional convex, linear, and phased array probes, we established a performance baseline by measuring the parameters of a laminar parabolic flow profile. These same parameters were then measured using probes with 1 to 10 disabled elements. The acquired velocity spectra from the functional probes and the probes with disabled elements were then analyzed to determine the overall Doppler power, maximum flow velocity, and average flow velocity. Color Flow Doppler images were also evaluated in a similar manner. The analysis of the Doppler spectra indicates that the overall Doppler power as well as the detected maximum and average velocities decrease with the increasing number of disabled elements. With multiple disabled elements, decreases in the detected maximum and average velocities greater than 20% were recorded. Similar results were also observed with Color Flow Doppler measurements. Our results confirmed that the degradation of the ultrasound probe through the loss of viable elements will negatively affect the quality of the Doppler-derived diagnostic information. We conclude that the results of Doppler measurements cannot be considered accurate or reliable if there are four or more contiguous dead elements in any given probe.

  5. Tissue Doppler Imaging in the evaluation of abdominal aortic pulsatility: a useful tool for the neonatologist.

    Science.gov (United States)

    Valerio, Enrico; Grison, Alessandra; Capretta, Anna; Golin, Rosanna; Ferrarese, Paola; Bellettato, Massimo

    2017-03-01

    Sonographic cardiac evaluation of newborns with suspected aortic coarctation (AoC) should tend to demonstrate a good phasic and pulsatile flow and the absence of pressure gradient along a normally conformed aortic arch from the modified left parasternal and suprasternal echocardiographic views; these findings, however, may not necessarily rule out a more distal coarctation in the descending aorta. For this reason, the sonographic exam of newborns with suspected AoC should always include a Doppler evaluation of abdominal aortic blood flow from the subcostal view. Occasionally, however, a clearly pulsatile Doppler flow trace in abdominal aorta may be difficult to obtain due to the bad insonation angle existing between the probe and the vessel. In such suboptimal ultrasonic alignment situation, the use of Tissue Doppler Imaging instead of classic Doppler flow imaging may reveal a preserved aortic pulsatility by sampling the aortic wall motion induced by normal flow. We propose to take advantage of the TDI pattern as a surrogate of a normal pulsatile Doppler flow trace in abdominal aorta when the latter is difficult to obtain due to malalignment with the insonated vessel.

  6. Clinical and echocardiographic features of aorto-atrial fistulas

    Directory of Open Access Journals (Sweden)

    Ananthasubramaniam Karthik

    2005-01-01

    Full Text Available Abstract Aorto-atrial fistulas (AAF are rare but important pathophysiologic conditions of the aorta and have varied presentations such as acute pulmonary edema, chronic heart failure and incidental detection of the fistula. A variety of mechanisms such as aortic dissection, endocarditis with pseudoaneurysm formation, post surgical scenarios or trauma may precipitate the fistula formation. With increasing survival of patients, particularly following complex aortic reconstructive surgeries and redo valve surgeries, recognition of this complication, its clinical features and echocardiographic diagnosis is important. Since physical exam in this condition may be misleading, echocardiography serves as the cornerstone for diagnosis. The case below illustrates aorto-left atrial fistula formation following redo aortic valve surgery with slowly progressive symptoms of heart failure. A brief review of the existing literature of this entity is presented including emphasis on echocardiographic diagnosis and treatment.

  7. Echocardiographic Evaluation of Patent Ductus Arteriosus in Preterm Infants

    Directory of Open Access Journals (Sweden)

    Romaine Arlettaz

    2017-06-01

    Full Text Available Patent ductus arteriosus (PDA is part of the typical morbidity profile of the preterm infant, with a high incidence of 80–90% in extremely low birth weight infants born before 26 weeks of gestation. Whereas spontaneous closure of the ductus arteriosus (DA is likely in term infants, it is less so in preterm ones. PDA is associated with increased mortality and various comorbidities including cardiac failure, need for respiratory support, bronchopulmonary dysplasia, pulmonary or intracranial hemorrhage, and necrotizing enterocolitis; however, there is no proven causality between these morbidities and the presence of DA. Thus, the indication to close PDA remains highly controversial. This paper focuses on echocardiographic evaluation of PDA in the preterm infant and particularly on the echocardiographic signs of hemodynamic significance.

  8. A New Active Cavitation Mapping Technique for Pulsed HIFU Applications – Bubble Doppler

    Science.gov (United States)

    Li, Tong; Khokhlova, Tatiana; Sapozhnikov, Oleg; Hwang, Joo Ha; Sapozhnikov, Oleg; O’Donnell, Matthew

    2015-01-01

    In this work, a new active cavitation mapping technique for pulsed high-intensity focused ultrasound (pHIFU) applications termed bubble Doppler is proposed and its feasibility tested in tissue-mimicking gel phantoms. pHIFU therapy uses short pulses, delivered at low pulse repetition frequency, to cause transient bubble activity that has been shown to enhance drug and gene delivery to tissues. The current gold standard for detecting and monitoring cavitation activity during pHIFU treatments is passive cavitation detection (PCD), which provides minimal information on the spatial distribution of the bubbles. B-mode imaging can detect hyperecho formation, but has very limited sensitivity, especially to small, transient microbubbles. The bubble Doppler method proposed here is based on a fusion of the adaptations of three Doppler techniques that had been previously developed for imaging of ultrasound contrast agents – color Doppler, pulse inversion Doppler, and decorrelation Doppler. Doppler ensemble pulses were interleaved with therapeutic pHIFU pulses using three different pulse sequences and standard Doppler processing was applied to the received echoes. The information yielded by each of the techniques on the distribution and characteristics of pHIFU-induced cavitation bubbles was evaluated separately, and found to be complementary. The unified approach - bubble Doppler – was then proposed to both spatially map the presence of transient bubbles and to estimate their sizes and the degree of nonlinearity. PMID:25265178

  9. Female children and adolescents with type 1 diabetes have more pronounced early echocardiographic signs of diabetic cardiomyopathy.

    Science.gov (United States)

    Suys, Bert E; Katier, Nienke; Rooman, Raoul P A; Matthys, Dirk; Op De Beeck, Lieve; Du Caju, Mark V L; De Wolf, Daniel

    2004-08-01

    This study was designed to assess whether children and adolescents with type 1 diabetes have early echocardiographic signs of subclinical cardiac dysfunction and whether sex, state of metabolic control, and diabetes duration are of influence. Systolic and diastolic blood pressure in supine and upright positions and echocardiographic parameters, including tissue Doppler measurements of the septal mitral annulus, were evaluated in 80 children and adolescents with stable type 1 diabetes and 52 age- and sex-matched control subjects. A possible correlation was examined for age, sex, HbA(1c), and diabetes duration with univariate and multivariate regression analysis. Female diabetic patients showed significantly larger left ventricular wall dimensions (left ventricular posterior wall in diastole 0.54 +/- 0.08 vs. 0.48 +/- 0.11 cm) and signs of significant diastolic filling abnormalities on conventional and tissue Doppler echocardiography (mitral valve-atrial contraction velocity 0.47 +/- 0.12 vs. 0.40 +/- 0.09 m/s; tricuspid valve-atrial contraction velocity 0.35 +/- 0.09 vs. 0.30 +/- 0.07 m/s; early filling velocity/myocardial velocity during early filling 7.15 +/- 1.47 vs. 6.17 +/- 1.07; isovolumetric relaxation time [IVRT] 66 +/- 8 vs. 58 +/- 8 ms) compared with female control subjects, suggesting delayed myocardial relaxation. Male diabetic patients only differed significantly from their control subjects for IVRT (66 +/- 9 vs. 59 +/- 8 ms). The measured parameters showed an expected correlation with age and BMI standard deviation scores in the control group. This correlation was significantly weaker in the diabetic population; only a weak influence was found for diabetes duration and glycosylated hemoglobin levels. Young diabetic patients already have significant changes in left ventricular dimensions and myocardial relaxation, with the girls clearly being more affected. Tissue Doppler proved to have additional value in the evaluation of ventricular filling in this

  10. Doppler Tissue Imaging Is an Independent Predictor of Outcome in Patients with ST-Segment Elevation Myocardial Infarction Treated with Primary Percutaneous Coronary Intervention

    DEFF Research Database (Denmark)

    Biering-Sørensen, Tor; Jensen, Jan Skov; Pedersen, Sune

    2014-01-01

    BACKGROUND: Doppler tissue imaging (DTI) detects early signs of left ventricular (LV) dysfunction; however, the prognostic significance of DTI after ST-segment elevation myocardial infarction (STEMI) is unknown. The aim of this study was to evaluate the prognostic value of DTI after STEMI in pati...... prognosis for patients with STEMIs independent of conventional echocardiographic parameters. DTI velocities should be evaluated together as they interact with the prognosis....

  11. Echocardiographic evaluation of coronary arteries in congenital heart disease.

    Science.gov (United States)

    Freire, Grace; Miller, Michelle S

    2015-12-01

    Among populations of patients with the congenital heart disease, there is considerable diversity in the anatomy of the coronary arteries. Understanding these anatomical differences is vitally important in directing interventions and surgical repair. In this report, the authors describe the echocardiographic evaluation of the variants of coronary artery anatomy in the following lesions: transposition of the great arteries, congenitally corrected transposition of the great arteries, double-inlet left ventricle, common arterial trunk, tetralogy of Fallot, and double-outlet right ventricle.

  12. Echocardiographic Assessment of Pulmonary Arterial Hypertension for Pediatricians and Neonatologists

    Directory of Open Access Journals (Sweden)

    Gregory James Skinner

    2017-09-01

    Full Text Available There is a growing awareness of the role that increased pulmonary vascular resistance (PVR plays in many pathologies; therefore, assessment of pulmonary artery pressure (PAP is an increasingly requested investigation in the critical care environment. This article will go through the basic concepts regarding PAP and PVR, then will go on to outline the various echocardiographic parameters which are used to assess them. Finally, an outline of how to undertake this assessment will be presented.

  13. A comparison between brachial and echocardiographic systolic time intervals.

    Directory of Open Access Journals (Sweden)

    Ho-Ming Su

    Full Text Available Systolic time interval (STI is an established noninvasive technique for the assessment of cardiac function. Brachial STIs can be automatically determined by an ankle-brachial index (ABI-form device. The aims of this study are to evaluate whether the STIs measured from ABI-form device can represent those measured from echocardiography and to compare the diagnostic values of brachial and echocardiographic STIs in the prediction of left ventricular ejection fraction (LVEF <50%. A total of 849 patients were included in the study. Brachial pre-ejection period (bPEP and brachial ejection time (bET were measured using an ABI-form device and pre-ejection period (PEP and ejection time (ET were measured from echocardiography. Agreement was assessed by correlation coefficient and Bland-Altman plot. Brachial STIs had a significant correlation with echocardiographic STIs (r = 0.644, P<0.001 for bPEP and PEP; r  = 0.850, P<0.001 for bET and ET; r = 0.708, P<0.001 for bPEP/bET and PEP/ET. The disagreement between brachial and echocardiographic STIs (brachial STIs minus echocardiographic STIs was 28.55 ms for bPEP and PEP, -4.15 ms for bET and ET and -0.11 for bPEP/bET and PEP/ET. The areas under the curve for bPEP/bET and PEP/ET in the prediction of LVEF <50% were 0.771 and 0.765, respectively. Brachial STIs were good alternatives to STIs obtained from echocardiography and also helpful in prediction of LVEF <50%. Brachial STIs automatically obtained from an ABI-form device may be helpful for evaluation of left ventricular systolic dysfunction.

  14. Echocardiographic Assessment of Pulmonary Arterial Hypertension for Pediatricians and Neonatologists.

    Science.gov (United States)

    Skinner, Gregory James

    2017-01-01

    There is a growing awareness of the role that increased pulmonary vascular resistance (PVR) plays in many pathologies; therefore, assessment of pulmonary artery pressure (PAP) is an increasingly requested investigation in the critical care environment. This article will go through the basic concepts regarding PAP and PVR, then will go on to outline the various echocardiographic parameters which are used to assess them. Finally, an outline of how to undertake this assessment will be presented.

  15. Frame to Frame Diffeomorphic Motion Analysis from Echocardiographic Sequences

    OpenAIRE

    Zhang, Zhijun; Sahn, David; Song, Xubo

    2011-01-01

    International audience; Quantitative motion analysis from echocardiography is an important yet challenging problem. We develop a motion estimation algorithm for echocardiographic image sequences based on diffeomorphic image registration in which the velocity field is spatiotemporally smooth. The novelty of this work is that instead of optimizing a functional of velocity field which consists of similarity metrics between a reference image to each of the following images (\\textitfirst-to-follow...

  16. Comparisons between PW Doppler system and enhanced FM Doppler system

    DEFF Research Database (Denmark)

    Wilhjelm, Jens E.; Pedersen, P. C.

    1995-01-01

    This paper presents a new implementation of an echo-ranging FM Doppler system with improved performance, relative to the FM Doppler system reported previously. The use of long sweeps provides a significant reduction in peak to average power ratio compared to pulsed wave (PW) emission. A PW Doppler...... system exploits the direct relationship between arrival time of the received signal and range from the transducer. In the FM Doppler systems, a similar relationship exists in the spectral domain of the demodulated received signals, so that range is represented by frequency. Thus, a shift in location...... of moving scatterers between consecutive emissions corresponds to a frequency shift in the spectral signature. The improvement relative to the earlier version of the FM Doppler system is attained by utilizing cross-correlation of real spectra rather than of magnitude spectra for assessing flow velocity...

  17. Transthoracic echocardiographically-guided interventional cardiac procedures in the dog.

    Science.gov (United States)

    Caivano, Domenico; Birettoni, Francesco; Fruganti, Alessandro; Rishniw, Mark; Knafelz, Patrizia; Moïse, N Sydney; Porciello, Francesco

    2012-09-01

    Interventional cardiac procedures are traditionally performed using fluoroscopy, or, more recently, transesophageal echocardiography (TEE). Neither modality is widely available to practicing cardiologists worldwide. We examined whether balloon valvuloplasty of pulmonic stenosis (PS) and transarterial occlusion of patent ductus arteriosus (PDA) in dogs could be performed safely with transthoracic echocardiography (TTE). A prospective consecutive case series of 26 client-owned dogs with PS (n = 10) and PDA (n = 16). The cardiovascular procedures were performed using TTE. Each dog was positioned on a standard echocardiography table in right lateral recumbency (dogs with PS) or left lateral recumbency (dogs with PDA). Guide wires, balloon catheters, Amplatz(®) Canine Ductal Occluder (ACDO) delivery sheaths, and ACDO were imaged by standard echocardiographic views optimized to allow visualization of the defects and devices. Procedures were performed successfully without major complications in 20 dogs. In 2 dogs (German shepherds) with Type III PDA, ACDO placement was unsuccessful; 2 other German Shepherds were excluded from the procedure because their ductal diameters, measured echocardiographically, exceeded the limits of the maximal ACDO size. Two dogs weighing ≤3.5 kg had suboptimal echocardiographic visualization of the PDA and were considered too small for safe ACDO deployment. All intravascular devices at the level of the heart and great vessels appeared hyperechoic on TTE image and could be clearly monitored and guided in real-time. We have demonstrated that TTE monitoring can guide each step of pulmonic balloon valvuloplasty and PDA occlusion without fluoroscopy. Copyright © 2012 Elsevier B.V. All rights reserved.

  18. Color Algebras

    Science.gov (United States)

    Mulligan, Jeffrey B.

    2017-01-01

    A color algebra refers to a system for computing sums and products of colors, analogous to additive and subtractive color mixtures. The difficulty addressed here is the fact that, because of metamerism, we cannot know with certainty the spectrum that produced a particular color solely on the basis of sensory data. Knowledge of the spectrum is not required to compute additive mixture of colors, but is critical for subtractive (multiplicative) mixture. Therefore, we cannot predict with certainty the multiplicative interactions between colors based solely on sensory data. There are two potential applications of a color algebra: first, to aid modeling phenomena of human visual perception, such as color constancy and transparency; and, second, to provide better models of the interactions of lights and surfaces for computer graphics rendering.

  19. Urine Color

    Science.gov (United States)

    ... is often caused by medications, certain foods or food dyes. In some cases, though, changes in urine color ... can be caused by: Dyes. Some brightly colored food dyes can cause green urine. Dyes used for some ...

  20. Ocean Color

    Data.gov (United States)

    National Aeronautics and Space Administration — Satellite-derived Ocean Color Data sets from historical and currently operational NASA and International Satellite missions including the NASA Coastal Zone Color...

  1. Entropy, color, and color rendering.

    Science.gov (United States)

    Price, Luke L A

    2012-12-01

    The Shannon entropy [Bell Syst. Tech J.27, 379 (1948)] of spectral distributions is applied to the problem of color rendering. With this novel approach, calculations for visual white entropy, spectral entropy, and color rendering are proposed, indices that are unreliant on the subjectivity inherent in reference spectra and color samples. The indices are tested against real lamp spectra, showing a simple and robust system for color rendering assessment. The discussion considers potential roles for white entropy in several areas of color theory and psychophysics and nonextensive entropy generalizations of the entropy indices in mathematical color spaces.

  2. Live/real time three-dimensional transthoracic echocardiographic assessment of Ebstein's anomaly.

    Science.gov (United States)

    Patel, Vinod; Nanda, Navin C; Rajdev, Sanjay; Mehmood, Farhat; Velayudhan, Dasan; Vengala, Srinivas; Copeland, Robert B; Madadi, Pavan

    2005-11-01

    We describe our experience in using live/real time three-dimensional transthoracic echocardiography (3D TTE) in the assessment of five adult patients with Ebstein's anomaly. The technique was found useful in assessing the distribution and extent of tethering of each of the three leaflets of the tricuspid valve (TV) to the underlying right ventricular walls and the ventricular septum. The characteristic bubble-like appearance resulting from bulging of the non-tethered areas of the TV leaflets was also well visualized in three dimensions and their size measured. Thus, an estimate of the nontethered or free segments of all three leaflets of the TV could be obtained using this technique. This has important implications when considering these patients for surgical repair of the TV. Visualization of all three leaflets of the TV and their extent of tethering by 3D TTE also made it easier to identify the boundaries of the functioning right ventricular chamber potentially providing a more reliable assessment of its volumes and ejection fraction. Cropping of color Doppler 3D TTE data sets provided en face viewing of the TV regurgitation vena contracta permitting accurate assessment of its shape and size. This has the potential to provide a more accurate quantitative estimation of TV regurgitation severity as compared to two-dimensional color Doppler. In conclusion, live/real time 3D TTE appears useful in supplementing two-dimensional echocardiography in more comprehensively assessing the morphologic features of Ebstein's anomaly.

  3. Neonatal pig brain: lack of heating during Doppler US.

    Science.gov (United States)

    Taylor, G A; Barnewolt, C E; Dunning, P S

    1998-05-01

    To evaluate potential local brain-heating effects of Doppler ultrasound (US) at high power output settings. After craniotomy, a temperature probe was inserted into deep white matter or basal ganglia in 12 anesthetized newborn piglets. The range gate and focal zone were placed directly over the temperature sensor. Brain and core (rectal) temperatures were measured before and during 5 minutes of continuous transdural duplex or color Doppler US, with transmitter power output settings of less than 500 mW in situ spatial peak temporal average or less than 800 mW in situ spatial peak temporal average. Temperature also was measured during administration of a US contrast agent with duplex US at less than 500 mW in situ spatial peak temporal average and after death at the same output setting. Maximal differences between the baseline and the post-US temperatures were, on average, less than 0.3 degree C (P > .5) and were highly correlated with changes in core temperature (r = .9, P heating during pulsed Doppler US (P > .6). There was no association between an increase in estimated power output and brain temperature change (P = .9). In addition, brain ischemia (postmortem exposure) was not associated with focal brain heating during pulsed Doppler US. Transfontanellar Doppler US alone or with administration of a contrast agent does not produce statistically significant focal brain heating at high transmitter power levels.

  4. Hyperemia in plantar fasciitis determined by power Doppler ultrasound.

    Science.gov (United States)

    McMillan, Andrew M; Landorf, Karl B; Gregg, Julie M; De Luca, Jason; Cotchett, Matthew P; Menz, Hylton B

    2013-12-01

    Cross-sectional observational study. To investigate the presence of soft tissue hyperemia in plantar fasciitis with power Doppler ultrasound. Localized hyperemia is an established feature of tendinopathy, suggesting that neurovascular in-growth may contribute to tendon-associated pain in some patients. The presence of abnormal soft tissue vascularity can be assessed with Doppler ultrasound, and a positive finding can assist with targeted treatment plans. However, very little is known regarding the presence of hyperemia in plantar fasciitis and the ability of routine Doppler ultrasound to identify vascular in-growth in the plantar fascia near its proximal insertion. This observational study included 30 participants with plantar fasciitis unrelated to systemic disease and 30 age- and sex-matched controls. Ultrasound examination was performed with a 13- to 5-MHz linear transducer, and power Doppler images were assessed by 2 blinded investigators. Hyperemia of the plantar fascia was present in 8 of 30 participants with plantar fasciitis and in 2 of 30 controls. The between-group difference for hyperemia, using a 4-point scale, was statistically significant, with participants with plantar fasciitis showing increased Doppler ultrasound signal compared to controls (Mann-Whitney U, P = .03). However, the majority of participants with plantar fasciitis with evidence of hyperemia demonstrated very mild color changes, and only 3 were found to have moderate or marked hyperemia. Mild hyperemia can occur with plantar fasciitis, but most individuals will not exhibit greater soft tissue vascularity when assessed with routine Doppler ultrasound. Clinicians treating plantar fasciitis should not consider a positive Doppler signal as essential for diagnosis of the condition but, rather, as a feature that may help to refine the treatment plan for an individual patient.

  5. Tissue Doppler-derived indices predict exercise capacity in patients with apical hypertrophic cardiomyopathy.

    Science.gov (United States)

    Ha, Jong-Won; Cho, Jung-Rae; Kim, Jin-Mi; Ahn, Jeong-Ah; Choi, Eui-Young; Kang, Seok-Min; Rim, Se-Joong; Chung, Namsik

    2005-11-01

    Although impaired left ventricular (LV) diastolic function is a prominent feature of hypertrophic cardiomyopathy (HCM), diastolic function and its relation to exercise capacity in apical HCM (ApHCM) has not been explored previously. This study was sought to determine the relationship between diastolic mitral annular velocities combined with conventional Doppler indexes and exercise capacity in patients with ApHCM. Twenty-nine patients with ApHCM (24 men; mean age +/- SD, 57 +/- 10 years) underwent supine bicycle exercise with simultaneous respiratory gas analysis and two-dimensional and Doppler echocardiographic study. The mitral inflow velocities (early filling [E], late filling, and deceleration time) were traced and measured. Early diastolic mitral annular velocity (E') was measured at the septal corner of mitral annulus by Doppler tissue imaging (DTI) from the apical four-chamber view. Pro-brain natriuretic peptide (proBNP) was measured at the time of echocardiography using a quantitative electrochemiluminescence immunoassay. E/E' ratio correlated inversely with maximal oxygen uptake (Vo(2)max) [r = - 0.47, p = 0.0106]. There was a significant positive correlation between E' and Vo(2)max (r = 0.41, p = 0.024). However, no correlation was found between conventional two-dimensional, Doppler indices, and proBNP and Vo(2)max). Of all the echocardiographic and clinical parameters assessed, E/E' ratio had the best correlation with exercise capacity (r - 0.47) and was the strongest independent predictor of Vo(2)max by multivariate analysis (p = 0.0106). DTI-derived indexes (E', E/E' ratio), an estimate of myocardial relaxation and LV filling pressures, correlate with exercise capacity in patients with ApHCM, suggesting that abnormal diastolic function may be a factor limiting exercise capacity.

  6. Color Algebras

    Science.gov (United States)

    Mulligan, Jeffrey B.

    2017-01-01

    A color algebra refers to a system for computing sums and products of colors, analogous to additive and subtractive color mixtures. We would like it to match the well-defined algebra of spectral functions describing lights and surface reflectances, but an exact correspondence is impossible after the spectra have been projected to a three-dimensional color space, because of metamerism physically different spectra can produce the same color sensation. Metameric spectra are interchangeable for the purposes of addition, but not multiplication, so any color algebra is necessarily an approximation to physical reality. Nevertheless, because the majority of naturally-occurring spectra are well-behaved (e.g., continuous and slowly-varying), color algebras can be formulated that are largely accurate and agree well with human intuition. Here we explore the family of algebras that result from associating each color with a member of a three-dimensional manifold of spectra. This association can be used to construct a color product, defined as the color of the spectrum of the wavelength-wise product of the spectra associated with the two input colors. The choice of the spectral manifold determines the behavior of the resulting system, and certain special subspaces allow computational efficiencies. The resulting systems can be used to improve computer graphic rendering techniques, and to model various perceptual phenomena such as color constancy.

  7. Color invariance

    NARCIS (Netherlands)

    Geusebroek, J.M.; van den Boomgaard, R.; Smeulders, A.W.M.; Geerts, H.

    2001-01-01

    This paper presents the measurement of colored object reflectance, under different, general assumptions regarding the imaging conditions. We exploit the Gaussian scale-space paradigm for color images to define a framework for the robust measurement of object reflectance from color images. Object

  8. Laser Doppler Imaging of Microflow

    CERN Document Server

    Gross, Michel; Leng, Jacques

    2013-01-01

    We report a pilot study with a wide-field laser Doppler detection scheme used to perform laser Doppler anemometry and imaging of particle seeded microflow. The optical field carrying the local scatterers (particles) dynamic state, as a consequence of momentum transfer at each scattering event, is analyzed in the temporal frequencies domain. The setup is based on heterodyne digital holography, which is used to map the scattered field in the object plane at a tunable frequency with a multipixel detector. We show that wide-field heterodyne laser Doppler imaging can be used for quantitative microflow diagnosis; in the presented study, maps of the first-order moment of the Doppler frequency shift are used as a quantitative and directional estimator of the Doppler signature of particles velocity.

  9. Uterine arteriovenous malformations: gray-scale and Doppler US features with MR imaging correlation.

    Science.gov (United States)

    Huang, M W; Muradali, D; Thurston, W A; Burns, P N; Wilson, S R

    1998-01-01

    To describe the gray-scale and color and duplex Doppler ultrasound (US) and the magnetic resonance (MR) imaging features of uterine arteriovenous malformations (AVMs). Uterine AVMs in 10 patients were retrospectively evaluated. All patients underwent gray-scale US and color and duplex Doppler US. Nine underwent angiography with therapeutic embolization; four, MR imaging. The resistance index (RI), pulsatility index (PI), and peak systolic velocities (PSVs) were evaluated. At gray-scale US, uterine AVMs were nonspecific and manifested as subtle myometrial inhomogeneity, tubular spaces within the myometrium, intramural uterine mass, endometrial mass, or cervical mass or sometimes as prominent parametrial vessels. Color Doppler features were consistent and included intense juxtaposed signals with aliasing and apparent flow reversals. Spectral Doppler US revealed low-resistance flow (RI, 0.25-0.55; PI, 0.3-0.6) and PSVs greater than 96 cm/sec, which suggests arteriovenous shunting. MR imaging showed a bulky uterus, a focal uterine mass, disruption of the junctional zones, serpiginous flow-related signal voids, and prominent parametrial vessels. Gray-scale morphology and Doppler US features should allow noninvasive diagnosis of uterine AVMs. Doppler and MR imaging features of uterine AVMs may overlap with other causes of arteriovenous shunting, including abnormal placentation and gestational trophoblastic disease (GTD). These can be differentiated with serum beta human chorionic gonadotropin test results (negative with AVM, positive with GTD).

  10. Color Categories and Color Appearance

    Science.gov (United States)

    Webster, Michael A.; Kay, Paul

    2012-01-01

    We examined categorical effects in color appearance in two tasks, which in part differed in the extent to which color naming was explicitly required for the response. In one, we measured the effects of color differences on perceptual grouping for hues that spanned the blue-green boundary, to test whether chromatic differences across the boundary…

  11. Color Terms and Color Concepts

    Science.gov (United States)

    Davidoff, Jules

    2006-01-01

    In their lead articles, both Kowalski and Zimiles (2006) and O'Hanlon and Roberson (2006) declare a general relation between color term knowledge and the ability to conceptually represent color. Kowalski and Zimiles, in particular, argue for a priority for the conceptual representation in color term acquisition. The complexities of the interaction…

  12. Color Analysis

    Science.gov (United States)

    Wrolstad, Ronald E.; Smith, Daniel E.

    Color, flavor, and texture are the three principal quality attributes that determine food acceptance, and color has a far greater influence on our judgment than most of us appreciate. We use color to determine if a banana is at our preferred ripeness level, and a discolored meat product can warn us that the product may be spoiled. The marketing departments of our food corporations know that, for their customers, the color must be "right." The University of California Davis scorecard for wine quality designates four points out of 20, or 20% of the total score, for color and appearance (1). Food scientists who establish quality control specifications for their product are very aware of the importance of color and appearance. While subjective visual assessment and use of visual color standards are still used in the food industry, instrumental color measurements are extensively employed. Objective measurement of color is desirable for both research and industrial applications, and the ruggedness, stability, and ease of use of today's color measurement instruments have resulted in their widespread adoption.

  13. Color categories and color appearance

    Science.gov (United States)

    Webster, Michael A.; Kay, Paul

    2011-01-01

    We examined categorical effects in color appearance in two tasks, which in part differed in the extent to which color naming was explicitly required for the response. In one, we measured the effects of color differences on perceptual grouping for hues that spanned the blue–green boundary, to test whether chromatic differences across the boundary were perceptually exaggerated. This task did not require overt judgments of the perceived colors, and the tendency to group showed only a weak and inconsistent categorical bias. In a second case, we analyzed results from two prior studies of hue scaling of chromatic stimuli (De Valois, De Valois, Switkes, & Mahon, 1997; Malkoc, Kay, & Webster, 2005), to test whether color appearance changed more rapidly around the blue–green boundary. In this task observers directly judge the perceived color of the stimuli and these judgments tended to show much stronger categorical effects. The differences between these tasks could arise either because different signals mediate color grouping and color appearance, or because linguistic categories might differentially intrude on the response to color and/or on the perception of color. Our results suggest that the interaction between language and color processing may be highly dependent on the specific task and cognitive demands and strategies of the observer, and also highlight pronounced individual differences in the tendency to exhibit categorical responses. PMID:22176751

  14. Frequency of mitral valve dysfunction from mitral anular calcium as detected by Doppler echocardiography.

    Science.gov (United States)

    Labovitz, A J; Nelson, J G; Windhorst, D M; Kennedy, H L; Williams, G A

    1985-01-01

    Doppler echocardiography is useful for detecting and quantifying mitral regurgitation (MR) and mitral stenosis (MS). To determine the prevalence of these abnormalities in patients with mitral anular calcium (MAC), 51 consecutive patients who had an echocardiographic diagnosis of MAC were examined by Doppler ultrasound. Transmitral flow was evaluated to determine the presence of MR or left ventricular inflow obstruction (MS) by continuous and pulsed-wave Doppler echocardiography. The severity of these hemodynamic abnormalities was quantitated by previously described techniques. Eleven patients (22%) had mild MR, 17 (33%) had moderate to severe MR and 4 (8%) had significant MS. Clinical findings such as a systolic murmur, evidence of congestive heart failure, and dyspnea on exertion were not helpful in distinguishing patients with no or mild MR from those who had moderate to severe MR. M-mode measured left atrial size was significantly larger (p less than 0.05) in patients with moderate to severe MR. This study suggests that MR is often associated with MAC, that MS is not a rare finding with MAC, and that Doppler echocardiography can quantitate these lesions in the elderly when symptoms are not specific and physical findings are inconclusive or absent.

  15. Colored operads

    CERN Document Server

    Yau, Donald

    2016-01-01

    The subject of this book is the theory of operads and colored operads, sometimes called symmetric multicategories. A (colored) operad is an abstract object which encodes operations with multiple inputs and one output and relations between such operations. The theory originated in the early 1970s in homotopy theory and quickly became very important in algebraic topology, algebra, algebraic geometry, and even theoretical physics (string theory). Topics covered include basic graph theory, basic category theory, colored operads, and algebras over colored operads. Free colored operads are discussed in complete detail and in full generality. The intended audience of this book includes students and researchers in mathematics and other sciences where operads and colored operads are used. The prerequisite for this book is minimal. Every major concept is thoroughly motivated. There are many graphical illustrations and about 150 exercises. This book can be used in a graduate course and for independent study.

  16. Echocardiographic and biochemical analysis of cardiac function and injury among female amateur runners post-marathon.

    Science.gov (United States)

    Montiel, G; Horn, T; Vafa, R; Solera, A; Hollmann, W; Predel, H G; Brinkmann, C

    2016-03-01

    Numerous studies with male amateur runners have determined negative changes in their cardiac function/of their myocard following long endurance loads. This study aims to examine such potential changes in women, specifically, after running a marathon. A total of 18 female amateur runners (39.5 ± 10.5 years) were examined before (T1), immediately after (T2) and 24 h post-marathon (T3). An echocardiography was performed using Tissue Doppler (TD) imaging. In addition, the concentration of cardiac troponin T (cTnT) and the activity of the myocardial muscle creatine kinase (CK-MB) were determined at T1 and T2. The echocardiographic parameters revealed impairment of the diastolic function, without, however, documenting a diastolic dysfunction (in accordance with the classification of Nagueh (J Am Soc Echocardiogr, 22:107-33, 2009)). The ratio of blood flow velocity through the mitral valve during early versus late diastole (MV E/A ratio), for example, decreased. The values measured at T3 were similar to those measured at T1. The ratio of early transmitral diastolic filling velocity and of the transmitral diastolic filling velocity by TD imaging (MV E/E') did not indicate any change from T1 to T2, but a significant increase at T3 (in comparison with T1). The systolic function (measured by the left ventricular ejection fraction) did not change significantly. The cTnT concentration and CK-MB activity were significantly higher in T2 than in T1. The data collected does not provide any solid evidence of pathological changes in the cardiac function of female amateur runners post-marathon, although the lab values indicate a strongly increased myocardial stimulation.

  17. Atrial Fibrillation Ablation in Systolic Dysfunction: Clinical and Echocardiographic Outcomes

    Directory of Open Access Journals (Sweden)

    Tasso Julio Lobo

    2015-01-01

    Full Text Available Background: Heart failure and atrial fibrillation (AF often coexist in a deleterious cycle. Objective: To evaluate the clinical and echocardiographic outcomes of patients with ventricular systolic dysfunction and AF treated with radiofrequency (RF ablation. Methods: Patients with ventricular systolic dysfunction [ejection fraction (EF <50%] and AF refractory to drug therapy underwent stepwise RF ablation in the same session with pulmonary vein isolation, ablation of AF nests and of residual atrial tachycardia, named "background tachycardia". Clinical (NYHA functional class and echocardiographic (EF, left atrial diameter data were compared (McNemar test and t test before and after ablation. Results: 31 patients (6 women, 25 men, aged 37 to 77 years (mean, 59.8±10.6, underwent RF ablation. The etiology was mainly idiopathic (19 p, 61%. During a mean follow-up of 20.3±17 months, 24 patients (77% were in sinus rhythm, 11 (35% being on amiodarone. Eight patients (26% underwent more than one procedure (6 underwent 2 procedures, and 2 underwent 3 procedures. Significant NYHA functional class improvement was observed (pre-ablation: 2.23±0.56; postablation: 1.13±0.35; p<0.0001. The echocardiographic outcome also showed significant ventricular function improvement (EF pre: 44.68%±6.02%, post: 59%±13.2%, p=0.0005 and a significant left atrial diameter reduction (pre: 46.61±7.3 mm; post: 43.59±6.6 mm; p=0.026. No major complications occurred. Conclusion: Our findings suggest that AF ablation in patients with ventricular systolic dysfunction is a safe and highly effective procedure. Arrhythmia control has a great impact on ventricular function recovery and functional class improvement.

  18. Atrial Fibrillation Ablation in Systolic Dysfunction: Clinical and Echocardiographic Outcomes

    Science.gov (United States)

    Lobo, Tasso Julio; Pachon, Carlos Thiene; Pachon, Jose Carlos; Pachon, Enrique Indalecio; Pachon, Maria Zelia; Pachon, Juan Carlos; Santillana, Tomas Guillermo; Zerpa, Juan Carlos; Albornoz, Remy Nelson; Jatene, Adib Domingos

    2015-01-01

    Background Heart failure and atrial fibrillation (AF) often coexist in a deleterious cycle. Objective To evaluate the clinical and echocardiographic outcomes of patients with ventricular systolic dysfunction and AF treated with radiofrequency (RF) ablation. Methods Patients with ventricular systolic dysfunction [ejection fraction (EF) <50%] and AF refractory to drug therapy underwent stepwise RF ablation in the same session with pulmonary vein isolation, ablation of AF nests and of residual atrial tachycardia, named "background tachycardia". Clinical (NYHA functional class) and echocardiographic (EF, left atrial diameter) data were compared (McNemar test and t test) before and after ablation. Results 31 patients (6 women, 25 men), aged 37 to 77 years (mean, 59.8±10.6), underwent RF ablation. The etiology was mainly idiopathic (19 p, 61%). During a mean follow-up of 20.3±17 months, 24 patients (77%) were in sinus rhythm, 11 (35%) being on amiodarone. Eight patients (26%) underwent more than one procedure (6 underwent 2 procedures, and 2 underwent 3 procedures). Significant NYHA functional class improvement was observed (pre-ablation: 2.23±0.56; postablation: 1.13±0.35; p<0.0001). The echocardiographic outcome also showed significant ventricular function improvement (EF pre: 44.68%±6.02%, post: 59%±13.2%, p=0.0005) and a significant left atrial diameter reduction (pre: 46.61±7.3 mm; post: 43.59±6.6 mm; p=0.026). No major complications occurred. Conclusion Our findings suggest that AF ablation in patients with ventricular systolic dysfunction is a safe and highly effective procedure. Arrhythmia control has a great impact on ventricular function recovery and functional class improvement. PMID:25387404

  19. Congenital heart disease in Nigerian children: a multicenter echocardiographic study.

    Science.gov (United States)

    Sadoh, Wilson E; Uzodimma, Chinyere C; Daniels, Queennette

    2013-04-01

    Congenital heart disease (CHD) is among the leading causes of morbidity and mortality in childhood. We report on the spectrum of echocardiographically diagnosed CHD from three different centers across Nigeria. Over a period of 42 months, children who were referred for echocardiographic evaluation in the centers located in three large metropolitan cities were consecutively recruited if they were confirmed to have identifiable CHD. Data were collected on age, gender, and types of CHD and analyzed using SPSS 16 (Chicago, Illinois,). A total of 605 children were recruited, their mean age was 2.1 ± 3.5 (range 0-17) years, and 296 (48.9%) were males. Nearly half (42.5%) had echocardiographic diagnosis of their CHD within the first year of life. Only 17% of the diagnoses were made in the neonatal age group. Acyanotic CHDs were more common than the cyanotic heart diseases (82.8% vs 17.2%). The most common CHD was ventricular septal defect (VSD; 46.6%) followed by patent ductus arteriosus (12.1%), atrial septal defect (8.7%), atrioventricular septal defect (8.2%), and tetralogy of Fallot (7.8%). More than half of the VSDs were perimembranous (55.1%) followed by outlet VSD (23.8%), muscular (10.7%), and inlet VSD (9.6%). Only 42 (6.9%) of the entire study population had definitive intervention. The VSD is the most prevalent CHD in Nigerian children. There is increasing awareness, availability, and use of diagnostic facilities as mirrored in the age distribution of the children. However, access to definitive surgery is poor and draws attention to the urgent need for affordable surgical facilities in the country.

  20. Echocardiographic parameters of captive western lowland gorillas (Gorilla gorilla gorilla).

    Science.gov (United States)

    Murphy, Hayley Weston; Dennis, Patricia; Devlin, William; Meehan, Tom; Kutinsky, Ilana

    2011-12-01

    A total of 163 echocardiographic studies on western lowland gorillas (Gorilla gorilla gorilla) were submitted for evaluation; 140 from 99 animals were suitable for analysis. Of these, 81 studies (42 studies from 35 males ranging in age from 11-41+ yr and 39 studies from 31 females ranging in age from 11-41+ yr) are reported here. Three studies from 3 females and 56 studies from 30 males were excluded from this report due to cardiac abnormalities. Cardiac parameters measured were aortic root (Ao Rt) diameter and left atrial (L atrium) size. Left ventricular (LV) measurements included left ventricular internal diameter in systole (LVID(s)) and diastole (LVID(d)) as well as diastolic septal (IVS) and posterior wall thickness (LVPW). Values considered to be normal in females > 11 yr of age were: Ao Rt 60%. The data from male gorillas show a separation in animals based on three cardiac parameters: systolic function, LV cavity size, and LV wall thickness. Male gorillas > 11 yr of age fall into two groups; unaffected and affected. Unaffected animals are defined as those with no echocardiographic abnormalities and a consistent Ao Rt of 58%. The affected group consisted of male gorillas that exhibited changes in echocardiographic parameters representing the presence of cardiovascular disease. The results determined in this database, gathered from data collected from 1999-2009, suggest a sex-based difference between males and females with predominantly males demonstrating evidence of cardiac disease. The most striking finding seen in this study is that of progressive LV hypertrophy and depressed LV EF in affected adult male gorillas.

  1. Dynamical Segmentation of the Left Ventricle in Echocardiographic Image Sequences

    Science.gov (United States)

    2001-10-25

    1 DYNAMICAL SEGMENTATION OF THE LEFT VENTRICLE IN ECHOCARDIOGRAPHIC IMAGE SEQUENCES A. Bosnjak1,2, V. Burdin 1, V. Torrealba 2, G. Montilla 2, B...V, Bosnjak A, Acuña M, Hernández L, Roux C, Montilla G. “3D Dynamics Echocardiography. Workstation for the Acquisition, Reconstruction and...Torrealba V., Hernández L., Acuña M., Montilla G., Bosnjak A., Roux C. “Interpolación Espacial de Imágenes Médicas 3D basada en movimiento”. Avances

  2. Simultaneous bilateral contrast transcranial doppler monitoring in patients with intracardiac and intrapulmonary shunts.

    Science.gov (United States)

    Horner, S; Ni, X S; Weihs, W; Harb, S; Augustin, M; Duft, M; Niederkorn, K

    1997-09-01

    The prevalence of a right-to-left intracardiac shunt, demonstrated by echocardiography and transcranial Doppler sonography has been shown to be higher in stroke patients than in normal controls. The aim of this study was to assess the sensitivity and specificity of contrast transcranial Doppler sonography in comparison to transesophageal echocardiography in the detection and differentiation of intracardiac and intrapulmonary shunts and to correlate the transcranial Doppler findings with clinical outcome and morphological findings. Forty five consecutive stroke patients with suspected paradoxical embolism were entered into the study. In all 25 patients with middle cerebral artery stroke of the left (56%) or right (44%) territory and echocardiographic demonstrated patent foramen ovale (80%) or intrapulmonary shunt (20%), simultaneous bilateral transcranial Doppler sonography of the middle cerebral arteries was performed after contrast medium injection during rest and valsalva straining under standardized and optimized conditions. Overall sensitivity for the detection of a right-to-left shunt by contrast transcranial Doppler sonography was 97% and overall specificity was 70%. Bilateral appearance of microbubbles, microbubble count and time delay of microbubble appearance significantly increased after valsalva straining. In patients with intracardiac shunts, a significantly higher microbubble count (32 vs. 13 in patients with an intrapulmonary shunt) and a shorter time interval of microbubble appearance (11 vs. 14 s in patients with intrapulmonary shunts) was observed. There was no correlation between the side and numerical distribution of microbubble count and the location and severity of the current clinical symptoms, as well as between microbubble count and presence and hemispherical distribution of brain infarcts. Transcranial Doppler sonography is a highly sensitive method for the detection of right-to-left shunts, whether of cardiac or pulmonary location. However

  3. Colored percolation

    Science.gov (United States)

    Kundu, Sumanta; Manna, S. S.

    2017-05-01

    A model called "colored percolation" has been introduced with its infinite number of versions in two dimensions. The sites of a regular lattice are randomly occupied with probability p and are then colored by one of the n distinct colors using uniform probability q =1 /n . Denoting different colors by the letters of the Roman alphabet, we have studied different versions of the model like A B ,A B C ,A B C D ,A B C D E ,... etc. Here, only those lattice bonds having two different colored atoms at the ends are defined as connected. The percolation threshold pc(n ) asymptotically converges to its limiting value of pc as 1 /n . The model has been generalized by introducing a preference towards a subset of colors when m out of n colors are selected with probability q /m each and the rest of the colors are selected with probability (1 -q )/(n -m ) . It has been observed that pc(q ,m ) depends nontrivially on q and has a minimum at qmin=m /n . In another generalization the fractions of bonds between similarly and dissimilarly colored atoms have been treated as independent parameters. Phase diagrams in this parameter space have been drawn exhibiting percolating and nonpercolating phases.

  4. COLOR IMAGES

    Directory of Open Access Journals (Sweden)

    Dominique Lafon

    2011-05-01

    Full Text Available The goal of this article is to present specific capabilities and limitations of the use of color digital images in a characterization process. The whole process is investigated, from the acquisition of digital color images to the analysis of the information relevant to various applications in the field of material characterization. A digital color image can be considered as a matrix of pixels with values expressed in a vector-space (commonly 3 dimensional space whose specificity, compared to grey-scale images, is to ensure a coding and a representation of the output image (visualisation printing that fits the human visual reality. In a characterization process, it is interesting to regard color image attnbutes as a set of visual aspect measurements on a material surface. Color measurement systems (spectrocolorimeters, colorimeters and radiometers and cameras use the same type of light detectors: most of them use Charge Coupled Devices sensors. The difference between the two types of color data acquisition systems is that color measurement systems provide a global information of the observed surface (average aspect of the surface: the color texture is not taken into account. Thus, it seems interesting to use imaging systems as measuring instruments for the quantitative characterization of the color texture.

  5. Dual-Doppler Feasibility Study

    Science.gov (United States)

    Huddleston, Lisa L.

    2012-01-01

    When two or more Doppler weather radar systems are monitoring the same region, the Doppler velocities can be combined to form a three-dimensional (3-D) wind vector field thus providing for a more intuitive analysis of the wind field. A real-time display of the 3-D winds can assist forecasters in predicting the onset of convection and severe weather. The data can also be used to initialize local numerical weather prediction models. Two operational Doppler Radar systems are in the vicinity of Kennedy Space Center (KSC) and Cape Canaveral Air Force Station (CCAFS); these systems are operated by the 45th Space Wing (45 SW) and the National Weather Service Melbourne, Fla. (NWS MLB). Dual-Doppler applications were considered by the 45 SW in choosing the site for the new radar. Accordingly, the 45th Weather Squadron (45 WS), NWS MLB and the National Aeronautics and Space Administration tasked the Applied Meteorology Unit (AMU) to investigate the feasibility of establishing dual-Doppler capability using the two existing systems. This study investigated technical, hardware, and software requirements necessary to enable the establishment of a dual-Doppler capability. Review of the available literature pertaining to the dual-Doppler technique and consultation with experts revealed that the physical locations and resulting beam crossing angles of the 45 SW and NWS MLB radars make them ideally suited for a dual-Doppler capability. The dual-Doppler equations were derived to facilitate complete understanding of dual-Doppler synthesis; to determine the technical information requirements; and to determine the components of wind velocity from the equation of continuity and radial velocity data collected by the two Doppler radars. Analysis confirmed the suitability of the existing systems to provide the desired capability. In addition, it is possible that both 45 SW radar data and Terminal Doppler Weather Radar data from Orlando International Airport could be used to alleviate any

  6. Doppler characteristics of sea clutter.

    Energy Technology Data Exchange (ETDEWEB)

    Raynal, Ann Marie; Doerry, Armin Walter

    2010-06-01

    Doppler radars can distinguish targets from clutter if the target's velocity along the radar line of sight is beyond that of the clutter. Some targets of interest may have a Doppler shift similar to that of clutter. The nature of sea clutter is different in the clutter and exo-clutter regions. This behavior requires special consideration regarding where a radar can expect to find sea-clutter returns in Doppler space and what detection algorithms are most appropriate to help mitigate false alarms and increase probability of detection of a target. This paper studies the existing state-of-the-art in the understanding of Doppler characteristics of sea clutter and scattering from the ocean to better understand the design and performance choices of a radar in differentiating targets from clutter under prevailing sea conditions.

  7. Statement for Doppler waveforms analysis.

    Science.gov (United States)

    Mahé, Guillaume; Boulon, Carine; Desormais, Ileana; Lacroix, Philippe; Bressollette, Luc; Guilmot, Jean-Louis; Le Hello, Claire; Sevestre, Marie-Antoinette; Pernod, Gilles; Constans, Joel; Boissier, Christian; Bura-Rivière, Alessandra

    2017-08-01

    Peripheral artery disease of the lower limbs (PAD) is a common disease. Evaluation of PAD is primarily based on non-invasive examinations with analysis of the arterial Doppler signal being a key element. However, the description of arterial Doppler waveforms morphologies varies considerably across medical schools and from country to country. In order to overcome this issue, the French College of Teachers for Vascular Medicine (Collège des Enseignants de Médecine Vasculaire; CEMV) has summarised the published data on Doppler waveforms analysis and proposes a new "Saint-Bonnet" classification system to describe Doppler waveforms morphologies. The simplified Saint-Bonnet classification comprises eight types and allows taking into account if the Doppler signal does not revert to baseline. This classification, which is based on previous classifications, could improve the descriptions of both physiological and pathological waveforms, recorded in lower limb arteries. According to the reviewed literature, recommendations about the use of Doppler waveforms are proposed. This statement is a preamble to reach an international consensus on the subject, which would standardize the description of arterial waveforms and improve the management of PAD patients.

  8. The reliability of echocardiographic left ventricular wall motion index to identify high-risk patients for multicenter studies

    DEFF Research Database (Denmark)

    Gislason, Gunnar H; Gadsbøll, Niels; Quinones, Miguel A

    2006-01-01

    OBJECTIVE: To study whether the use of echocardiographic left ventricular (LV) wall motion index (WMI) is a dependable parameter for identifying patients with LV dysfunction to be enrolled in multicenter trials. METHODS: Videotaped echocardiographic examinations from 200 randomly selected patient...

  9. La ecografía Doppler en la detección de invasión vesical en la placenta percreta: nuestra experiencia

    Directory of Open Access Journals (Sweden)

    P. García Saraví

    2014-07-01

    Conclusión: La ecografía Doppler es un método muy útil para la detección de la invasión vesical en el percretismo placentario. Esta se observa con una vascularización parietal positiva en el Doppler color.

  10. How to prevent echocardiographic misinterpretation of Gerbode type defect as pulmonary arterial hypertension.

    Science.gov (United States)

    Tehrani, Faramarz; Movahed, Mohammad-Reza

    2007-12-01

    We present a rare case of left ventricular to right atrial communication, a Gerbode type defect discovered in an adult female, originally misinterpreted as pulmonary arterial hypertension. The case report will be followed by the review of the literature and a discussion about how to prevent echocardiographic misinterpretation of this defect as pulmonary arterial hypertension using careful echocardiographic examination.

  11. Echocardiographic two-dimensional view of the pulmonary valve in infants: the high transsternal view.

    Science.gov (United States)

    Granados, Miguel A; Albert, Leticia; Toral, Belén

    2016-04-01

    Neonates and small infants have unique characteristics that make it possible to obtain echocardiographic views that are inaccessible in older patients. A high transsternal approach through the cartilaginous sternum and the thymus gland allows visualisation of a short-axis view of the pulmonary valve. This view should be included as part of routine protocols for echocardiographic examinations performed in this age group.

  12. Extent of myocardial noncompaction: comparison between MRI and echocardiographic evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Alhabshan, Fahad; Smallhorn, Jeffrey F.; Golding, Fraser; Musewe, Norman; Freedom, Robert M. [University of Toronto, Department of Pediatrics, Division of Cardiology, Hospital for Sick Children, Toronto, Ontario (Canada); Yoo, Shi-Joon [University of Toronto, Department of Diagnostic Imaging, Division of Cardiology, Hospital for Sick Children, Toronto, Ontario (Canada)

    2005-11-01

    Noncompaction of the left ventricular myocardium is an important cause of cardiomyopathy. There is no clear consensus about its diagnostic criteria or the diagnostic test of choice. MRI is increasingly used in the pediatric cardiac field because of its superior and objective image quality. To compare the echocardiographic and MRI findings in four patients with recently diagnosed ventricular noncompaction. We compared the extent of myocardial involvement shown at MRI and echocardiography in four individuals, two patients with echocardiographic diagnosis of left ventricular noncompaction, and two family members of one of the patients. In all patients, MRI showed wider area of involvement than echocardiography. A definite diagnosis was entertained in only two patients by echocardiography but in all by MRI. Cine imaging was diagnostic of the disease in all patients. Black-blood pool imaging with double-inversion recovery sequence also helped to visualize the abnormal areas by showing slow flow artifacts in the four- and two-chamber images. MRI provided better delineation of the extent of the abnormal trabeculation in patients with noncompaction of the left ventricular myocardium. It was particularly useful when the myocardial involvement was subtle, as in the asymptomatic family members. (orig.)

  13. [Echocardiographic study of left ventricular geometry in spontaneously hypertensive rats].

    Science.gov (United States)

    Escudero, Eduardo M; Pinilla, Oscar A; Carranza, Verónica B

    2009-01-01

    The purpose of this study was to analyze by echocardiogram left ventricular (LV) geometry in spontaneously hypertensive rats (SHR). Echocardiographic study, systolic blood pressure and heart rate were obtained in 114 male, 4-month old rats, 73 SHR and 41 Wistar (W). Left ventricular mass index (LVMI), relative wall thickness (RWT), stroke volume, and mid ventricular shortening were calculated with echocardiographic parameters. Normal LV was defined considering the mean plus 2 SD of LVMI and RWT in W. Patterns of abnormal LV geometry were: LV concentric remodeling, LVMI 0.71; eccentric, left ventricular hypertrophy (LVH), LVMI > 2.06 mg/g - RWT 2.06 mg/g - RWT > 0.71. Systolic blood pressure (SBP) and cardiac output (CO) were used to obtain total peripheral resistance (TPR). twelve % of SHR had normal LV geometry; 18% LV concentric remodeling; 33% concentric LVH and 37% eccentric LVH. LV concentric remodeling showed the smallest CO and highest TPR of any group. Eccentric LVH presented similar SBP as the other SHR groups and high CO with lower TPR. Our findings in SHR exhibit different patterns of LV geometry like in humans. These results strengthen the similarities between SHR and human essential hypertension.

  14. Balloon atrial septostomy under echocardiographic guide: case series

    Directory of Open Access Journals (Sweden)

    SM Meraji

    2012-12-01

    Full Text Available Background: Balloon atrial septostomy is an emergent procedure in pediatric cardiology. Nowadays, most patients in need of the procedure have acceptable outcomes after surgical repair. Thus, it is important to perform this procedure as safe as possible. By performing early arterial switch operation and prostaglandin infusion, the rate of balloon atrial septostomy has markedly decreased. However, not all centers performing early arterial switch repairs have abandoned atrial septostomy, even in patients who respond favorably to prostaglandin infusion.Case presentation: In total, eight 1- to 15-day old term neonates admitted in Shahid Rajaee Heart Center in Tehran, Iran from October 2009 to February 2011, with congenital heart diseases were scheduled for balloon atrial septostomy. In six cases the procedure was done exclusively under echocardiographic guidance and in two cases with the help of fluoroscopy. Success was defined as the creation of an atrial septal defect with a diameter equal to or more than 5 mm and ample mobility of its margins.Results: Male sex was predominant (87% and the mean age of the neonates was six days. The diagnosis in all cases was simple transposition of great arteries. The procedure was successful in all patients with any cardiovascular complication.Conclusion: Balloon atrial septostomy is an emergent procedure that can be done safely and effectively under echocardiographic guidance. According to the feasibility of this technique it could be performed fast, safe and effective at bedside, avoiding patient transportation to hemodynamic laboratory or referral center.

  15. Coronary Flow Velocity Reserve Assessed by Transthoracic Doppler

    DEFF Research Database (Denmark)

    Michelsen, Marie M; Peña, Adam; Mygind, Naja D

    2016-01-01

    BACKGROUND: Coronary flow velocity reserve (CFVR) measured by transthoracic Doppler echocardiography is a noninvasive measure of microvascular function, but it has not achieved widespread use, mainly because of concerns of validity and feasibility. The aim of this study was to describe the feasib......BACKGROUND: Coronary flow velocity reserve (CFVR) measured by transthoracic Doppler echocardiography is a noninvasive measure of microvascular function, but it has not achieved widespread use, mainly because of concerns of validity and feasibility. The aim of this study was to describe...... by transthoracic Doppler echocardiography of the left anterior descending coronary artery to measure CFVR (n = 947). Quality was evaluated on the basis of (1) identification of the left anterior descending coronary artery, (2) maintained probe position throughout the examination, (3) visibility and configuration...... of the left anterior descending coronary artery in two-dimensional color Doppler mode, and (4) gradual, consistent increases of characteristic, well-defined flow velocity curves in pulsed-wave mode. RESULTS: The mean age (SD) was 62.1 ± 9.7 years. On the basis of the evaluations, patients were divided...

  16. Doppler ultrasound and renal artery stenosis: An overview

    Science.gov (United States)

    Granata, A.; Fiorini, F.; Andrulli, S.; Logias, F.; Gallieni, M.; Romano, G.; Sicurezza, E.; Fiore, C.E.

    2009-01-01

    Renovascular disease is a complex disorder, most commonly caused by fibromuscular dysplasia and atherosclerotic diseases. It can be found in one of three forms: asymptomatic renal artery stenosis (RAS), renovascular hypertension, and ischemic nephropathy. Particularly, the atherosclerotic form is a progressive disease that may lead to gradual and silent loss of renal function. Thus, early diagnosis of RAS is an important clinical objective since interventional therapy may improve or cure hypertension and preserve renal function. Screening for RAS is indicated in suspected renovascular hypertension or ischemic nephropathy, in order to identify patients in whom an endoluminal or surgical revascularization is advisable. Screening tests for RAS have improved considerably over the last decade. While captopril renography was widely used in the past, Doppler ultrasound (US) of the renal arteries (RAs), angio-CT, or magnetic resonance angiography (MRA) have replaced other modalities and they are now considered the screening tests of choice. An arteriogram is rarely needed for diagnostic purposes only. Color-Doppler US (CDUS) is a noninvasive, repeatable, relatively inexpensive diagnostic procedure which can accurately screen for renovascular diseases if performed by an expert. Moreover, the evaluation of the resistive index (RI) at Doppler US may be very useful in RAS affected patients for predicting the response to revascularization. However, when a discrepancy exists between clinical data and the results of Doppler US, additional tests are mandatory. PMID:23397022

  17. Effect of gel-instillation sonography on Doppler ultrasound findings in endometrial polyps.

    Science.gov (United States)

    Van Den Bosch, T; Van Schoubroeck, D; Luts, J; Bignardi, T; Condous, G; Epstein, E; Leone, F P; Testa, A C; Valentin, L; Van Huffel, S; Bourne, T; Timmerman, D

    2011-09-01

    Saline infusion sonohysterography has been reported to suppress the color signal within the endometrium at color or power Doppler evaluation. The aim of this study was to evaluate if gel-instillation sonography (GIS) affects the power Doppler signal in patients with endometrial polyps. Ultrasound volumes of the uterus, obtained by three-dimensional ultrasound imaging of 25 women with histologically confirmed endometrial polyps, were assessed offline by six gynecologists with a special interest in gynecological ultrasound. Each woman contributed four volumes: one gray-scale volume and one power Doppler volume before GIS, and one gray-scale volume and one power Doppler volume at GIS. Power Doppler features before and after gel infusion were compared. At unenhanced ultrasound a pedicle artery was seen in 27-46% of cases, whereas, after gel infusion the examiners reported a pedicle artery in 30-46% of cases (Exact McNemar's test P-values ranged from 0.50 to 1.00). The level of agreement between unenhanced ultrasound and GIS ranged from 59 to 91% (Cohen's kappa values ranged from 0.17 to 0.79). There was no tendency for a pedicle artery to be identified less often at GIS than before gel instillation. Gel infusion does not affect the power Doppler signal in patients with endometrial polyps. Copyright © 2011 ISUOG. Published by John Wiley & Sons, Ltd.

  18. Airborne Doppler Wind Lidar Post Data Processing Software DAPS-LV

    Science.gov (United States)

    Beyon, Jeffrey Y. (Inventor); Koch, Grady J. (Inventor); Kavaya, Michael J. (Inventor)

    2015-01-01

    Systems, methods, and devices of the present invention enable post processing of airborne Doppler wind LIDAR data. In an embodiment, airborne Doppler wind LIDAR data software written in LabVIEW may be provided and may run two versions of different airborne wind profiling algorithms. A first algorithm may be the Airborne Wind Profiling Algorithm for Doppler Wind LIDAR ("APOLO") using airborne wind LIDAR data from two orthogonal directions to estimate wind parameters, and a second algorithm may be a five direction based method using pseudo inverse functions to estimate wind parameters. The various embodiments may enable wind profiles to be compared using different algorithms, may enable wind profile data for long haul color displays to be generated, may display long haul color displays, and/or may enable archiving of data at user-selectable altitudes over a long observation period for data distribution and population.

  19. Cardiac dysfunction assessed by echocardiographic tissue Doppler imaging is an independent predictor of mortality in the general population

    DEFF Research Database (Denmark)

    Mogelvang, Rasmus; Sogaard, Peter; Pedersen, Sune A

    2009-01-01

    ; P=0.001), were significant predictors of death in Cox proportional-hazards models adjusted for clinical variables (age, sex, body mass index, heart rate, hypertension, diabetes mellitus, and ischemic heart disease) and conventional echocardiography. The adjusted hazard ratio for death in the third...... parameters, left ventricular dysfunction by TDI is a powerful and independent predictor of death, especially when systolic performance and diastolic performance are considered together, recognizing their interdependency and their complex relation to deteriorating cardiac function....

  20. Left ventricular diastolic dysfunction in obstructive sleep apnoea syndrome by an echocardiographic standardized approach: An observational study.

    Science.gov (United States)

    Bodez, Diane; Lang, Sylvie; Meuleman, Catherine; Boyer-Châtenet, Louise; Nguyen, Xuan-Lan; Soulat-Dufour, Laurie; Boccara, Franck; Fleury, Bernard; Cohen, Ariel

    2015-10-01

    The association between obstructive sleep apnoea syndrome (OSAS), left ventricular (LV) diastolic dysfunction and LV geometry remains controversial because of coexisting disorders. To evaluate LV diastolic dysfunction and its independent predictors in a real-life cohort of OSAS patients, by a standardized approach. We consecutively included 188 OSAS patients after an overnight polysomnography to undergo clinical evaluation, ambulatory blood pressure measurement and complete echocardiography, combining M-mode, two-dimensional Doppler and tissue Doppler imaging modes. Correlations between OSAS severity and clinical and echocardiographical variables were assessed, and logistic regression models were used to identify possible determining factors of LV diastolic dysfunction. Most patients were hypertensive (n=148, 78.7%) and already receiving treatment by continuous positive airway pressure (n=158, 84.5%). The prevalence of LV hypertrophy, defined by LV mass index (LVMi) normalized by height (2.7), was 12.4%, with a significant correlation with hypertension (P=0.004). The apnoea-hypopnoea index was correlated with body mass index (P<0.0001), 24-hour systolic blood pressure (P=0.01) and LVMi normalized by height (2.7) (P=0.03). Diastolic function assessed by a global approach was impaired for 70 patients (37.2%) and none of the OSAS severity variables was a determining factor after multivariable analysis with adjustment for age and sex. Diastolic dysfunction assessed by a standardized approach is common in OSAS and should be routinely evaluated; it is independently predicted by none of the respiratory severity variables. Copyright © 2015 Elsevier Masson SAS. All rights reserved.

  1. Doppler sonography of extracranial and intracranial vessels in patients with thrombotic stroke

    Directory of Open Access Journals (Sweden)

    Farhad Iranmanesh

    2006-12-01

    Full Text Available INTRODUCTION: The results of intracranial and extracranial vessel color Doppler sonography, which is now an inseparable part of patient evaluation, vary in different studies. The objective of this study was to evaluate the pattern of vascular involvement in thrombotic stroke and its relationship with risk factors of stroke. METHODS: One-hundred patients (45 males and 55 females with thrombotic stroke underwent transcranial sonography and color Doppler sonography of extracranial vessels. The pattern of vascular involvement was analyzed. The risk factors of stroke were also evaluated. RESULTS: Forty-seven percent of the studied individuals had some variations in their color Doppler sonography of extracranial vessels, 27% had changes in the intracranial vessels and 26% showed changes in both. The most frequently involved vessels among the intracranial and extracranial vessels were the middle cerebral artery and the internal carotid artery, respectively. The pattern of vascular involvement was unrelated to hypertension, cigarette smoking, diabetes mellitus, dyslipidemia or history of ischemic heart disease. Extracranial involvement in patients with positive history of MI was more prevalent than in those without such history. CONCLUSIONS: Extracranial vessel involvement in thrombotic stroke was found to be more prevalent than intracranial vessel involvement in the city of Rafsanjan; however, intracranial vessel involvement was more prevalent than in western countries. KEY WORDS: Thrombotic stroke, color Doppler sonography, intracranial vessels, extracranial, cerebrovascular risk factors

  2. Open-source, vendor-independent, automated multi-beat tissue Doppler echocardiography analysis.

    Science.gov (United States)

    Dhutia, Niti M; Zolgharni, Massoud; Mielewczik, Michael; Negoita, Madalina; Sacchi, Stefania; Manoharan, Karikaran; Francis, Darrel P; Cole, Graham D

    2017-08-01

    Current guidelines for measuring cardiac function by tissue Doppler recommend using multiple beats, but this has a time cost for human operators. We present an open-source, vendor-independent, drag-and-drop software capable of automating the measurement process. A database of ~8000 tissue Doppler beats (48 patients) from the septal and lateral annuli were analyzed by three expert echocardiographers. We developed an intensity- and gradient-based automated algorithm to measure tissue Doppler velocities. We tested its performance against manual measurements from the expert human operators. Our algorithm showed strong agreement with expert human operators. Performance was indistinguishable from a human operator: for algorithm, mean difference and SDD from the mean of human operators' estimates 0.48 ± 1.12 cm/s (R 2  = 0.82); for the humans individually this was 0.43 ± 1.11 cm/s (R 2  = 0.84), -0.88 ± 1.12 cm/s (R 2  = 0.84) and 0.41 ± 1.30 cm/s (R 2  = 0.78). Agreement between operators and the automated algorithm was preserved when measuring at either the edge or middle of the trace. The algorithm was 10-fold quicker than manual measurements (p Doppler traces as accurately as human experts. This automation permits rapid, bias-resistant multi-beat analysis from spectral tissue Doppler images.

  3. Image-based temporal alignment of echocardiographic sequences

    Science.gov (United States)

    Danudibroto, Adriyana; Bersvendsen, Jørn; Mirea, Oana; Gerard, Olivier; D'hooge, Jan; Samset, Eigil

    2016-04-01

    Temporal alignment of echocardiographic sequences enables fair comparisons of multiple cardiac sequences by showing corresponding frames at given time points in the cardiac cycle. It is also essential for spatial registration of echo volumes where several acquisitions are combined for enhancement of image quality or forming larger field of view. In this study, three different image-based temporal alignment methods were investigated. First, a method based on dynamic time warping (DTW). Second, a spline-based method that optimized the similarity between temporal characteristic curves of the cardiac cycle using 1D cubic B-spline interpolation. Third, a method based on the spline-based method with piecewise modification. These methods were tested on in-vivo data sets of 19 echo sequences. For each sequence, the mitral valve opening (MVO) time was manually annotated. The results showed that the average MVO timing error for all methods are well under the time resolution of the sequences.

  4. Echocardiographic left ventricular masses in distance runners and weight lifters

    Science.gov (United States)

    Longhurst, J. C.; Gonyea, W. J.; Mitchell, J. H.; Kelly, A. R.

    1980-01-01

    The relationships of different forms of exercise training to left ventricular mass and body mass are investigated by echocardiographic studies of weight lifters, long-distance runners, and comparatively sized untrained control subjects. Left ventricular mass determinations by the Penn convention reveal increased absolute left ventricular masses in long-distance runners and competitive weight lifters with respect to controls matched for age, body weight, and body surface area, and a significant correlation between ventricular mass and lean body mass. When normalized to lean body mass, the ventricular masses of distance runners are found to be significantly higher than those of the other groups, suggesting that dynamic training elevates left ventricular mass compared to static training and no training, while static training increases ventricular mass only to the extent that lean body mass is increased.

  5. Advances in transcranial Doppler clinical applications.

    Science.gov (United States)

    Topcuoglu, Mehmet Akif; Unal, Ali; Arsava, Ethem Murat

    2010-07-01

    Diagnostic neurosonology techniques including transcranial Doppler (TCD), transcranial color Doppler imaging (TCDI) and power motion-mode (PMD) TCD provide information about various aspects of cerebrovascular status such as microemboli detection, dynamic autoregulation and long-duration real-time monitoring of flow characteristics. Although most of the information provided cannot be obtained by any other imaging methodology, and is critical in clinical decision-making in the care of various neurovascular diseases, these modalities are widely underutilized. Increasing the familiarity to neurosonological techniques is of crucial importance. After briefly reviewing TCD, TCDI and PMD techniques, classical features are summarized and recent developments in the clinical neurosonology applications with specific interest in the neurovascular disorders. Practical perspectives of ultrasound evaluation of intracranial arterial status in various neurovascular diseases including sickle cell vasculopathy and vasospasm are reviewed in detail. Pearls on the neurosonological monitoring of acute ischemic stroke and increased intracranial pressure increase is provided. Standards of cerebral microembolism detection, right to left shunts diagnosis and cerebral autoregulation assessment are discussed methodologically. Future perspectives of therapeutic neurosonology including sonothrombolysis, microbubble-ultrasound-mediated gene and drug delivery into the brain, and alteration of the brain-blood barrier permeability are summarized. Suitable with future medicine, neurosonology brings imaging to the bedside, which enables the treating physician to monitor a given intervention in real time. A non-invasive neurosonology-guided treatment of various diseases could be possible in the near future. The first and foremost step in gaining mastery in this very fruitful field is beginning to use it.

  6. Echocardiographic chamber quantification in a healthy Dutch population.

    Science.gov (United States)

    van Grootel, R W J; Menting, M E; McGhie, J; Roos-Hesselink, J W; van den Bosch, A E

    2017-12-01

    For accurate interpretation of echocardiographic measurements normative data are required, which are provided by guidelines. For this article, the hypothesis was that these cannot be extrapolated to the Dutch population, since in Dutch clinical practice often higher values are found, which may not be pathological but physiological. Therefore this study aimed to 1) obtain and propose normative values for cardiac chamber quantification in a healthy Dutch population and 2) determine influences of baseline characteristics on these measurements. Prospectively recruited healthy subjects, aged 20-72 years (at least 28 subjects per age decade, equally distributed for gender) underwent physical examination and 2D and 3D echocardiography. Both ventricles and atria were assessed and volumes were calculated. 147 subjects were included (age 44 ± 14 years, 50% female). Overall, feasibility was good for both linear and volumetric measurements. Linear and volumetric parameters were consistently higher than current guidelines recommend, while functional parameters were in line with the guidelines. This was more so in the older population. 3D volumes were higher than 2D volumes. Gender dependency was seen in all body surface area (BSA) corrected volumes and with increasing age, ejection fractions decreased. This study provides 2D and 3D echocardiographic reference ranges for both ventricles and atria derived from a healthy Dutch population. BSA indexed volumes are gender-dependent, age did not influence ventricular volumes and a rise in blood pressure was independently associated with increased right ventricular volumes. The higher volumes found may be indicative for the Dutch population being the tallest in the world.

  7. Comparison of echocardiographic findings in patients with nonfunctioning adrenal incidentalomas

    Directory of Open Access Journals (Sweden)

    Narin Nasıroglu Imga

    2017-06-01

    Full Text Available Adrenal incidentalomas (AIs are usually discovered incidentally after imaging unrelated to adrenal glands. We aimed to evaluate standard risk factors for systemic atherosclerosis and echocardiographic changes in patients with nonfunctioning AIs and compare them with normal subjects. We evaluated 70 patients diagnosed with AIs and 51 healthy controls. Mean levels were determined for HbA1c, LDL, uric acid, fasting plasma insulin, HOMA, and neutrophil-to-lymphocyte ratio (NLR, and these values were found to be significantly higher in the patients than the controls. The mean left atrial diameter, interventricular septum thickness, posterior wall thickness, left ventricular mass, E-wave deceleration time, isovolumetric relaxation time, and the median ratio of the early transmittal flow velocity to the early diastolic tissue velocity (E/Em were higher in patients with AIs compared to controls. The mitral annular early diastolic velocity was lower in patients with AIs. The mean aortic diastolic diameter, stiffness index (SI, and aortic strain were higher, and aortic distensibility was lower in the patients. The mean right ventricular diameter, right atrial major-axis diameter, and right atrial minor-axis diameter were statistically higher in the patient group than the controls. A negative correlation was found between the NLR and aortic strain and aortic distensibility, while a positive correction was found between the NLR and SI. We found altered left ventricular (LV and right ventricular (RV echocardiographic findings in patients with AIs without known cardiovascular disease. Aortic stiffness was also increased. These changes may be related to an increase in cardiovascular risk factors in AI patients.

  8. Testicular ultrasensitive Doppler preliminary experience: a feasibility study.

    Science.gov (United States)

    Rocher, Laurence; Gennisson, Jean-Luc; Ferlicot, Sophie; Criton, Aline; Albiges, Laurence; Izard, Vincent; Bellin, Marie France; Correas, Jean-Michel

    2018-03-01

    Background Ultrasensitive Doppler is a novel non-invasive ultrasound (US) Doppler technique that improves sensitivity and resolution for the detection of slow flow. Purpose To investigate the feasibility of ultrasensitive Doppler (USD) for testicular disease diagnosis, using both qualitative and quantitative results. Material and Methods This prospective study was conducted in 160 successive men referred for scrotal US including B-mode and conventional Color-Doppler. A new USD sequence and algorithm dedicated to academic research were implemented into the US system. The quality criterion for a successful examination was the detection of well delineated intratesticular vessels. Qualitative USD results were described in terms of tumor vascular architecture and flow intensity for different pathologies for 41 patients. The testicular vascularization (TV), defined as a vessel's surface ratio, was quantified using customized MATLAB® software and compared in azoospermic and normal patients. Results USD was acquired successfully in 153/160 patients (95.6%). The tumor vascular architecture differed depending on the nature of the tumors. Leydig cell tumors exhibited mostly circumferential vascularization, while germ cell tumors exhibited straight vessels through the tumors, or anarchic vascular maps. USD improved the diagnostic performance of testicular Doppler US in a case of incomplete spermatic cord torsion and acute epididymitis. The reproducibility of TV measurements established an interclass correlation of 0.801. Non-Klinefelter syndrome non-obstructive azoospermia patients exhibited a lower TV compared to normal patients, to Klinefelter syndrome, and to obstructive azoospermia patients ( P < 0.002, P < 0.005, and P < 0.05, respectively). Conclusion Testicular USD can become a promising technique for improving US diagnosis of tumors, acute scrotum, and for determining infertility status.

  9. Inverse Doppler Effects in Flute

    CERN Document Server

    Zhao, Xiao P; Liu, Song; Shen, Fang L; Li, Lin L; Luo, Chun R

    2015-01-01

    Here we report the observation of the inverse Doppler effects in a flute. It is experimentally verified that, when there is a relative movement between the source and the observer, the inverse Doppler effect could be detected for all seven pitches of a musical scale produced by a flute. Higher tone is associated with a greater shift in frequency. The effect of the inverse frequency shift may provide new insights into why the flute, with its euphonious tone, has been popular for thousands of years in Asia and Europe.

  10. Duplex/doppler ultrasound test (image)

    Science.gov (United States)

    The duplex/doppler ultrasound test examines the blood flow in the major arteries and veins in the arms and legs. The ... duplex ultrasonagraphy to visualize the blood flow and doppler ultrasonagraphy provides an audio means to hear the ...

  11. Modeling human color categorization: Color discrimination and color memory

    NARCIS (Netherlands)

    Heskes, T.; van den Broek, Egon; Lucas, P.; Hendriks, Maria A.; Vuurpijl, L.G.; Puts, M.J.H.; Wiegerinck, W.

    2003-01-01

    Color matching in Content-Based Image Retrieval is done using a color space and measuring distances between colors. Such an approach yields non-intuitive results for the user. We introduce color categories (or focal colors), determine that they are valid, and use them in two experiments. The

  12. Understanding Doppler Broadening of Gamma Rays

    Energy Technology Data Exchange (ETDEWEB)

    Rawool-Sullivan, Mohini [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Sullivan, John P. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2014-07-03

    Doppler-broadened gamma ray peaks are observed routinely in the collection and analysis of gamma-ray spectra. If not recognized and understood, the appearance of Doppler broadening can complicate the interpretation of a spectrum and the correct identification of the gamma ray-emitting material. We have conducted a study using a simulation code to demonstrate how Doppler broadening arises and provide a real-world example in which Doppler broadening is found. This report describes that study and its results.

  13. Micro-Doppler Analysis of Small UAVs

    NARCIS (Netherlands)

    Wit, J.J.M. de; Harmanny, R.I.A.; Prémel Cabic, G.

    2012-01-01

    Coherent radar measures micro-Doppler properties of moving objects. The micro-Doppler signature depends on parts of an object moving and rotating in addition to the main body motion (e.g. rotor blades) and is therefore characteristic for the type of object. In this study, the micro-Doppler signature

  14. Speckles in laser doppler perfusion imaging

    NARCIS (Netherlands)

    Rajan, V.V.

    2007-01-01

    Laser Doppler Flowmetry (LDF) is a noninvasive diagnostic method to measure blood flow in tissue [1]. The technique is based on measuring the Doppler shift induced by moving red blood cells to the illuminating coherent light. A laser Doppler instrument often gives output signals related to the flux,

  15. The Doppler Effect--A New Approach

    Science.gov (United States)

    Allen, J.

    1973-01-01

    Discusses the Doppler effect as it applies to different situations, such as a stationary source of sound with the observer moving, a stationary observer, and the sound source and observer both moving. Police radar, satellite surveillance radar, radar astronomy, and the Doppler navigator, are discussed as applications of Doppler shift. (JR)

  16. Color superconductivity

    Energy Technology Data Exchange (ETDEWEB)

    Wilczek, F. [Institute for Advanced Study, Princeton, NJ (United States)

    1997-09-22

    The asymptotic freedom of QCD suggests that at high density - where one forms a Fermi surface at very high momenta - weak coupling methods apply. These methods suggest that chiral symmetry is restored and that an instability toward color triplet condensation (color superconductivity) sets in. Here I attempt, using variational methods, to estimate these effects more precisely. Highlights include demonstration of a negative pressure in the uniform density chiral broken phase for any non-zero condensation, which we take as evidence for the philosophy of the MIT bag model; and demonstration that the color gap is substantial - several tens of MeV - even at modest densities. Since the superconductivity is in a pseudoscalar channel, parity is spontaneously broken.

  17. Spatially Resolved MR-Compatible Doppler Ultrasound: Proof of Concept for Triggering of Diagnostic Quality Cardiovascular MRI for Function and Flow Quantification at 3T.

    Science.gov (United States)

    Crowe, Lindsey Alexandra; Manasseh, Gibran; Chmielewski, Aneta; Hachulla, Anne-Lise; Speicher, Daniel; Greiser, Andreas; Muller, Hajo; de Perrot, Thomas; Vallee, Jean-Paul; Salomir, Rares

    2018-02-01

    We demonstrate the use of a magnetic-resonance (MR)-compatible ultrasound (US) imaging probe using spatially resolved Doppler for diagnostic quality cardiovascular MR imaging (MRI) as an initial step toward hybrid US/MR fetal imaging. A newly developed technology for a dedicated MR-compatible phased array ultrasound-imaging probe acquired pulsed color Doppler carotid images, which were converted in near-real time to a trigger signal for cardiac cine and flow quantification MRI. Ultrasound and MR data acquired simultaneously were interference free. Conventional electrocardiogram (ECG) and the proposed spatially resolved Doppler triggering were compared in 10 healthy volunteers. A synthetic "false-triggered" image was retrospectively processed using metric optimized gating (MOG). Images were scored by expert readers, and sharpness, cardiac function and aortic flow were quantified. Four-dimensional (4-D) flow (two volunteers) showed feasibility of Doppler triggering over a long acquisition time. Imaging modalities were compatible. US probe positioning was stable and comfortable. Image quality scores and quantified sharpness were statistically equal for Doppler- and ECG-triggering (p ). ECG-, Doppler-triggered, and MOG ejection fractions were equivalent (p ), with false-triggered values significantly lower (p Doppler-triggered and MOG (p > 0.05). 4-D flow quantification gave consistent results between ECG and Doppler triggering. We report interference-free pulsed color Doppler ultrasound during MR data acquisition. Cardiovascular MRI of diagnostic quality was successfully obtained with pulsed color Doppler triggering. The hardware platform could further enable advanced free-breathing cardiac imaging. Doppler ultrasound triggering is applicable where ECG is compromised due to pathology or interference at higher magnetic fields, and where direct ECG is impossible, i.e., fetal imaging.

  18. "Porcelain heart" cardiomyopathy secondary to hyperparathyroidism: radiographic, echocardiographic, and cardiac CT appearances.

    LENUS (Irish Health Repository)

    Freeman, James

    2010-11-01

    We report the radiographic, echocardiographic and cardiac CT appearances of \\'porcelain heart\\' in an 85-year-old woman who presented with progressive heart failure. The extensive myocardial calcification was secondary to hyperparathyroidism with renal failure.

  19. "Porcelain heart" cardiomyopathy secondary to hyperparathyroidism: radiographic, echocardiographic, and cardiac CT appearances.

    LENUS (Irish Health Repository)

    Freeman, James

    2012-02-01

    We report the radiographic, echocardiographic and cardiac CT appearances of \\'porcelain heart\\' in an 85-year-old woman who presented with progressive heart failure. The extensive myocardial calcification was secondary to hyperparathyroidism with renal failure.

  20. Echocardiographic characteristics of patients with acute heart failure requiring tolvaptan: a retrospective study.

    Science.gov (United States)

    Nakada, Yasuki; Okayama, Satoshi; Nakano, Tomoya; Ueda, Tomoya; Onoue, Kenji; Takeda, Yukiji; Kawakami, Rika; Horii, Manabu; Uemura, Shiro; Fujimoto, Shinichi; Saito, Yoshihiko

    2015-06-08

    No study has investigated the admission echocardiographic characteristics of acute heart failure (AHF) patients who are resistant to conventional diuretics and require tolvaptan. We retrospectively analyzed the echocardiographic characteristics of AHF patients who were resistant to conventional diuretics and took tolvaptan (tolvaptan group: 26 patients), and compared them to those who were sensitive to conventional diuretics (conventional group: 180 patients). The tolvaptan group had a higher left atrial volume index (96.0 ± 85.0 mL/m2 vs. 45.8 ± 25.9 mL/m2, p tolvaptan had no significant echocardiographic differences compared to the non-responders. The admission echocardiographic characteristics of AHF patients requiring tolvaptan included a larger left atrium, inferior vena cava, and more severe tricuspid regurgitation. Echocardiography may provide useful information for the early and appropriate initiation of tolvaptan.

  1. Color digital holography using a single monochromatic imaging sensor.

    Science.gov (United States)

    Kiire, Tomohiro; Barada, Daisuke; Sugisaka, Jun-ichiro; Hayasaki, Yoshio; Yatagai, Toyohiko

    2012-08-01

    Color digital holography utilizing the Doppler effect is proposed. The time variation of holograms produced by superposing images at three wavelengths is recorded using a high-speed monochromatic imaging sensor. The complex amplitude at each wavelength can be extracted from frequency information contained in the Fourier transforms of the recorded holograms. An image of the object is reconstructed by the angular spectrum method. Reconstructed monochromatic images at the three wavelengths are combined to produce a color image for display.

  2. Usefulness of the myocardial performance index determined by tissue Doppler imaging m-mode for predicting mortality in the general population

    DEFF Research Database (Denmark)

    Møgelvang, Rasmus; Haahr-Pedersen, Sune Ammentorp; Schnohr, Peter

    2011-01-01

    The objective of this study was to evaluate the prognostic value of the myocardial performance index (MPI), assessed by color-coded tissue Doppler imaging (TDI) M-mode through the anterior mitral leaflet. Color TDI M-mode through the mitral leaflet is an easy, very fast, and precise method to est...... independent prognostic information in a low-risk population...

  3. Doppler tomography in fusion plasmas and astrophysics

    DEFF Research Database (Denmark)

    Salewski, Mirko; Geiger, B.; Heidbrink, W. W.

    2015-01-01

    Doppler tomography is a well-known method in astrophysics to image the accretion flow, often in the shape of thin discs, in compact binary stars. As accretion discs rotate, all emitted line radiation is Doppler-shifted. In fast-ion Dα (FIDA) spectroscopy measurements in magnetically confined plasma......, the Dα-photons are likewise Doppler-shifted ultimately due to gyration of the fast ions. In either case, spectra of Doppler-shifted line emission are sensitive to the velocity distribution of the emitters. Astrophysical Doppler tomography has lead to images of accretion discs of binaries revealing bright...... spots, spiral structures and flow patterns. Fusion plasma Doppler tomography has led to an image of the fast-ion velocity distribution function in the tokamak ASDEX Upgrade. This image matched numerical simulations very well. Here we discuss achievements of the Doppler tomography approach, its promise...

  4. Doppler time-of-flight imaging

    KAUST Repository

    Heide, Felix

    2015-07-30

    Over the last few years, depth cameras have become increasingly popular for a range of applications, including human-computer interaction and gaming, augmented reality, machine vision, and medical imaging. Many of the commercially-available devices use the time-of-flight principle, where active illumination is temporally coded and analyzed on the camera to estimate a per-pixel depth map of the scene. In this paper, we propose a fundamentally new imaging modality for all time-of-flight (ToF) cameras: per-pixel velocity measurement. The proposed technique exploits the Doppler effect of objects in motion, which shifts the temporal frequency of the illumination before it reaches the camera. Using carefully coded illumination and modulation frequencies of the ToF camera, object velocities directly map to measured pixel intensities. We show that a slight modification of our imaging system allows for color, depth, and velocity information to be captured simultaneously. Combining the optical flow computed on the RGB frames with the measured metric axial velocity allows us to further estimate the full 3D metric velocity field of the scene. We believe that the proposed technique has applications in many computer graphics and vision problems, for example motion tracking, segmentation, recognition, and motion deblurring.

  5. [Left ventricular functions in patients with cardiac syndrome X: a tissue Doppler study].

    Science.gov (United States)

    Yazici, Hüseyin Uğur; Sen, Nihat; Tavil, Yusuf; Hizal, Fatma; Turfan, Murat; Poyraz, Fatih; Boyaci, Bülent; Cengel, Atiye

    2009-12-01

    The aim of the study was to compare diagnostic accuracy of tissue Doppler imaging (TDI) and conventional Doppler echocardiography in diagnosis of left ventricular diastolic dysfunction in patients with cardiac syndrome X. Our study was designed as cross-sectional study. In our study, we compared 35 patients with cardiac syndrome X (19 female, mean age 47.2+/- 7.3 years) with 33 healthy persons as control group (18 female, mean age 49.5+/- 7.1 years) with no coronary artery disease and having no ischemic complaints or findings at exercise test. Left ventricular systolic function was found by considering mean values of modified Simpson method for left ventricular ejection fraction and TDI assessment of systolic wave peak velocity. The diastolic function of left ventricle was assessed with conventional echocardiography and TDI. Unpaired t test for independent samples or Mann-Whitney U test were used for comparison of continuous variables, Chi square test - for comparison of categorical variables. To define the capability of predicting diastolic dysfunction for conventional Doppler echocardiography and tissue Doppler imaging ROC curve analysis was applied. Left ventricular ejection fraction and systolic wave peak velocity were similar for both groups. Conventional Doppler echocardiographic measurements for left ventricular diastolic functions delineated the more frequent presence of diastolic dysfunction in cardiac syndrome X group As compared with controls (48% vs 18%; p<0.01). When both methods used for assessing diastolic dysfunction, it was found more apparent (66% vs 24%; p<0.01). When ROC curve was drawn for conventional Doppler echocardiography the AUC was 0.623, the sensitivity and the specificity were 49% and 76%, respectively. When the same was done for TDI the values were AUC=0.669, the sensitivity - 66% and the specificity - 68%. Our study revealed the deterioration of left ventricular diastolic function in patients with cardiac syndrome X. We found TDI

  6. Interpretation of Doppler Weather Radar Displays of Midlatitude Mesoscale Convective Systems.

    Science.gov (United States)

    Houze, Robert A., Jr.; Biggerstaff, M. I.; Rutledge, S. A.; Smull, B. F.

    1989-06-01

    The utility of color displays of Doppler-radar data in revealing real-time kinematic information has been demonstrated in past studies, especially for extratropical cyclones and severe thunderstorms. Such displays can also indicate aspects of the circulation within a certain type of mesoscale convective system-the squall line with trailing "stratiform" rain. Displays from a single Doppler radar collected in two squall-line storms observed during the Oklahoma-Kansas PRE-STORM project conducted in May and June 1985 reveal mesoscale-flow patterns in the stratiform rain region of the squall line, such as front-to-rear storm-relative flow at upper levels, a subsiding storm-relative rear inflow at middle and low levels, and low-level divergent flow associated with strong mesoscale subsidence. "Dual-Doppler" analysis further illustrates these mesoscale-flow features and, in addition, shows the structure of the convective region within the squall line and a mesoscale vortex in the "stratiform" region trailing the line. A refined conceptual model of this type of mesoscale convective system is presented based on previous studies and observations reported here.Recognition of "single-Doppler-radar" patterns of the type described in this paper, together with awareness of the conceptual model, should aid in the identification and interpretation of this type of mesoscale system at future NEXRAD sites. The dual-Doppler results presented here further indicate the utility of multiple-Doppler observations of mesoscale convective systems in the STORM program.

  7. Doppler echocardiography imaging in detecting multi-valvular lesions: a clinical evaluation in children with acute rheumatic fever.

    Science.gov (United States)

    Shivaram, Pushpa; Ahmed, Molla Imaduddin; Kariyanna, Pramod Theetha; Sabbineni, Harika; Avula, Uma Mahesh R

    2013-01-01

    Doppler echocardiography has been demonstrated to be accurate in diagnosing valvular lesions in rheumatic heart disease (RHD) when compared to clinical evaluation alone. To perform Doppler echocardiography in children clinically diagnosed by the Jones criteria to have acute rheumatic fever (ARF), and to then compare the effectiveness of echo in detecting single/multi-valvular lesions with that of the initial clinical evaluation. We enrolled 93 children who were previously diagnosed with ARF by clinical examination. Presence of valvular lesions were enlisted, first by clinical auscultation, and then by performing Doppler echocardiography. We found that Doppler echocardiography was a sensitive technique, capable of detecting valvular lesions that were missed by clinical auscultation alone. Echocardiography of patients with carditis revealed mitral regurgitation to be the most common lesion present (53 patients, 56.98%), followed by aortic regurgitation in 21 patients (22.6%). The difference between clinical and echocardiographic diagnosis in ARF children with carditis was statistically significant for mitral regurgitation, aortic regurgitation and tricuspid regurgitation. Clinical auscultation alone revealed 4 cases of mitral stenosis, 39 mitral regurgitation, 14 aortic regurgitation, 9 tricuspid regurgitation; in contrast, echo revealed 5 cases of mitral stenosis, 53 mitral regurgitation, 21 aortic regurgitation, 18 tricuspid regurgitation. Doppler echocardiography is a more sensitive technique for detecting valvular lesions. In the setting of ARF, echo enables a 46.9% higher detection level of carditis, as compared to the clinical examination alone. Echo was very significant in detecting regurgitation lesions, especially for cases of tricuspid regurgitation in the setting of multivalvular involvement. The results of our study are in accordance with previous clinical studies, all of which clearly demonstrate the advantages of Doppler echocardiography, paving the way

  8. Doppler echocardiography imaging in detecting multi-valvular lesions: a clinical evaluation in children with acute rheumatic fever.

    Directory of Open Access Journals (Sweden)

    Pushpa Shivaram

    Full Text Available RATIONALE: Doppler echocardiography has been demonstrated to be accurate in diagnosing valvular lesions in rheumatic heart disease (RHD when compared to clinical evaluation alone. OBJECTIVE: To perform Doppler echocardiography in children clinically diagnosed by the Jones criteria to have acute rheumatic fever (ARF, and to then compare the effectiveness of echo in detecting single/multi-valvular lesions with that of the initial clinical evaluation. METHODS AND RESULTS: We enrolled 93 children who were previously diagnosed with ARF by clinical examination. Presence of valvular lesions were enlisted, first by clinical auscultation, and then by performing Doppler echocardiography. We found that Doppler echocardiography was a sensitive technique, capable of detecting valvular lesions that were missed by clinical auscultation alone. Echocardiography of patients with carditis revealed mitral regurgitation to be the most common lesion present (53 patients, 56.98%, followed by aortic regurgitation in 21 patients (22.6%. The difference between clinical and echocardiographic diagnosis in ARF children with carditis was statistically significant for mitral regurgitation, aortic regurgitation and tricuspid regurgitation. Clinical auscultation alone revealed 4 cases of mitral stenosis, 39 mitral regurgitation, 14 aortic regurgitation, 9 tricuspid regurgitation; in contrast, echo revealed 5 cases of mitral stenosis, 53 mitral regurgitation, 21 aortic regurgitation, 18 tricuspid regurgitation. CONCLUSION: Doppler echocardiography is a more sensitive technique for detecting valvular lesions. In the setting of ARF, echo enables a 46.9% higher detection level of carditis, as compared to the clinical examination alone. Echo was very significant in detecting regurgitation lesions, especially for cases of tricuspid regurgitation in the setting of multivalvular involvement. The results of our study are in accordance with previous clinical studies, all of which clearly

  9. Echocardiography of congenital mitral valve disorders: echocardiographic-morphological comparisons.

    Science.gov (United States)

    Silverman, Norman H

    2014-12-01

    I surveyed our echocardiographic database of the years between 1998 and 2012 for congenital abnormalities of the mitral valve in patients over 14 years. A total of 249 patients with mitral valve abnormalities were identified. Abnormalities included clefts in the mitral valve in 58 patients, double orifice of the mitral valve in 19, mitral stenosis with two papillary muscles in 72, and mitral stenosis with one papillary muscle in 51 patients. Supravalvar rings were found in 35 patients with a single papillary muscle, and mitral stenoses with two papillary muscles were found in 22 patients. Mitral prolapse occurred in 44 patients and mitral valvar straddle in five patients. The patients were evaluated by all modalities of ultrasound available over the course of time. Although some lesions were isolated, there were many lesions in which more than one mitral deformity presented in the same patient. The patients are presented showing anatomical correlation with autopsy specimens, some of which came from the patients in this series, and others matched to show correlative anatomy. These lesions remain rare as a group and continue to have high morbidity and mortality.

  10. Echocardiographic findings in power athletes abusing anabolic androgenic steroids.

    Science.gov (United States)

    Hajimoradi, Behzad; Kazerani, Hashem

    2013-03-01

    Anabolic androgenic steroids (AAS) abuse for improving physical appearance and performance in body builders is common and has been considered responsible for serious cardiovascular effects. Due to disagreement about cardiovascular side effects of these drugs in published articles, this case control study was designed to evaluate the echocardiographic findings in body builder athletes who are current and chronic abusers of these drugs. Body builder athletes with continuous practice for the preceding two years and were training at least twice weekly were selected and divided into AAS abuser and non user and compared with age and BMI matched non athletic healthy volunteers (15 cases in each group). There was no significant difference in left ventricular size or function either systolic or diastolic in comparison to cases and control groups. The only difference was in diastolic size of septum and free wall but observed differences were only significant (P = 0.05) between first (athletic with AAS abuser) and third group (non athletic and nonuser). The difference between the above-mentioned indexes were not significant between two groups of athletes. Observed differences in diastolic size of septum and free wall is in favor of that long term abuse of anabolic steroid results in accentuation of physiologic hypertrophy due to long term sport most probably due to higher rate pressure product. Furthermore long term abuse and supra pharmacologic doses do not have significant effect in size and left ventricular function.

  11. Color naming across languages reflects color use.

    Science.gov (United States)

    Gibson, Edward; Futrell, Richard; Jara-Ettinger, Julian; Mahowald, Kyle; Bergen, Leon; Ratnasingam, Sivalogeswaran; Gibson, Mitchell; Piantadosi, Steven T; Conway, Bevil R

    2017-09-18

    What determines how languages categorize colors? We analyzed results of the World Color Survey (WCS) of 110 languages to show that despite gross differences across languages, communication of chromatic chips is always better for warm colors (yellows/reds) than cool colors (blues/greens). We present an analysis of color statistics in a large databank of natural images curated by human observers for salient objects and show that objects tend to have warm rather than cool colors. These results suggest that the cross-linguistic similarity in color-naming efficiency reflects colors of universal usefulness and provide an account of a principle (color use) that governs how color categories come about. We show that potential methodological issues with the WCS do not corrupt information-theoretic analyses, by collecting original data using two extreme versions of the color-naming task, in three groups: the Tsimane', a remote Amazonian hunter-gatherer isolate; Bolivian-Spanish speakers; and English speakers. These data also enabled us to test another prediction of the color-usefulness hypothesis: that differences in color categorization between languages are caused by differences in overall usefulness of color to a culture. In support, we found that color naming among Tsimane' had relatively low communicative efficiency, and the Tsimane' were less likely to use color terms when describing familiar objects. Color-naming among Tsimane' was boosted when naming artificially colored objects compared with natural objects, suggesting that industrialization promotes color usefulness.

  12. Low-frequency high-definition power Doppler in visualizing and defining fetal pulmonary venous connections.

    Science.gov (United States)

    Liu, Lin; He, Yihua; Li, Zhian; Gu, Xiaoyan; Zhang, Ye; Zhang, Lianzhong

    2014-07-01

    The use of low-frequency high-definition power Doppler in assessing and defining pulmonary venous connections was investigated. Study A included 260 fetuses at gestational ages ranging from 18 to 36 weeks. Pulmonary veins were assessed by performing two-dimensional B-mode imaging, color Doppler flow imaging (CDFI), and low-frequency high-definition power Doppler. A score of 1 was assigned if one pulmonary vein was visualized, 2 if two pulmonary veins were visualized, 3 if three pulmonary veins were visualized, and 4 if four pulmonary veins were visualized. The detection rate between Exam-1 and Exam-2 (intra-observer variability) and between Exam-1 and Exam-3 (inter-observer variability) was compared. In study B, five cases with abnormal pulmonary venous connection were diagnosed and compared to their anatomical examination. In study A, there was a significant difference between CDFI and low-frequency high-definition power Doppler for the four pulmonary veins observed (P definition power Doppler was higher than that when employing two-dimensional B-mode imaging or CDFI. There was no significant difference between the intra- and inter-observer variabilities using low-frequency high-definition power Doppler display of pulmonary veins (P > 0.05). The coefficient correlation between Exam-1 and Exam-2 was 0.844, and the coefficient correlation between Exam-1 and Exam-3 was 0.821. In study B, one case of total anomalous pulmonary venous return and four cases of partial anomalous pulmonary venous return were diagnosed by low-frequency high-definition power Doppler and confirmed by autopsy. The assessment of pulmonary venous connections by low-frequency high-definition power Doppler is advantageous. Pulmonary venous anatomy can and should be monitored during fetal heart examination.

  13. Colorful drying.

    Science.gov (United States)

    Lakio, Satu; Heinämäki, Jyrki; Yliruusi, Jouko

    2010-03-01

    Drying is one of the standard unit operations in the pharmaceutical industry and it is important to become aware of the circumstances that dominate during the process. The purpose of this study was to test microcapsulated thermochromic pigments as heat indicators in a fluid bed drying process. The indicator powders were manually granulated with alpha-lactose monohydrate resulting in three particle-size groups. Also, pellets were coated with the indicator powders. The granules and pellets were fluidized in fluid bed dryer to observe the progress of the heat flow in the material and to study the heat indicator properties of the indicator materials. A tristimulus colorimeter was used to measure CIELAB color values. Color indicator for heat detection can be utilized to test if the heat-sensitive API would go through physical changes during the pharmaceutical drying process. Both the prepared granules and pellets can be used as heat indicator in fluid bed drying process. The colored heat indicators give an opportunity to learn new aspects of the process at real time and could be exploded, for example, for scaling-up studies.

  14. What is Color Blindness?

    Science.gov (United States)

    ... these three color cone cells to determine our color perception. Color blindness can occur when one or more ... condition. Anyone who experiences a significant change in color perception should see an ophthalmologist (Eye M.D.). Next ...

  15. Colored Contact Lens Dangers

    Medline Plus

    Full Text Available ... One Use Facts About Colored Contacts and Halloween Safety Colored Contact Lens Facts Over-the-Counter Costume ... use of colored contact lenses , from the U.S. Food and Drug Administration (FDA). Are the colored lenses ...

  16. Echocardiographic evaluation of wheelchair-bound basketball players.

    Science.gov (United States)

    Karagoz, Tevfik; Ozer, Sema; Bayrakci, Volga; Ergun, Nevin

    2003-08-01

    Cardiopulmonary function in sedentary men whose lower limbs have been immobilized for years has been shown to be markedly lower than normal. However, the cardiopulmonary function of paraplegics who regularly activate their upper limps and trunk has been suggested to be almost normal in a few studies. The purpose of the present study was to evaluate the left ventricular dimensions, left ventricular mass, systolic and diastolic function in adolescent wheelchair-bound basketball players using echocardio-graphy, and to compare the results with those of sedentary adolescents unable to use their lower extremities and the results of able bodied controls. The study group consisted of 22 male adolescent high school students who were unable to use their lower extremities: 11 were members of a high school basketball team who had been regularly playing basketball for at least 2 years, and 11 were sedentary adolescents none of whom was engaged in any kind of routine training program. The control group consisted of 11 healthy able-bodied male adolescents of similar age. There were no significant differences in left ventricular dimensions and wall thickness, aortic root, left atrium diameters, or left ventricular filling characteristics between the three groups. Wheelchair-bound basketball players had increased left ventricular ejection fraction and shortening fraction compared with the sedentary unable-bodied individuals. Although left ventricular ejection fractions were significantly lower than in normal adolescents, all ejection fraction values except one were within the normal limits in the unable-bodied basketball players. The results of the present study suggest that an upper extremity exercise program and sports such as basketball can improve the cardiac functions and additional echocardiographic functions of people unable to use their lower extremities, potentially to normal levels.

  17. Echocardiographic and Hemodynamic Predictors of Mortality in Idiopathic Pulmonary Fibrosis

    Science.gov (United States)

    Rivera-Lebron, Belinda N.; Forfia, Paul R.; Kreider, Maryl; Lee, James C.; Holmes, John H.

    2013-01-01

    Background: Idiopathic pulmonary fibrosis (IPF) can lead to the development of pulmonary hypertension, which is associated with an increased risk of death. In pulmonary arterial hypertension, survival is directly related to the capacity of the right ventricle to adapt to elevated pulmonary vascular load. The relative importance of right ventricular function in IPF is not well understood. Our objective was to evaluate right ventricular echocardiographic and hemodynamic predictors of mortality in a cohort of patients with IPF referred for lung transplant evaluation. Methods: We performed a retrospective cohort study of 135 patients who met 2011 American Thoracic Society/European Respiratory Society criteria for IPF and who were evaluated for lung transplantation at the Hospital of the University of Pennsylvania. Results: Right ventricle:left ventricle diameter ratio (hazard ratio [HR], 4.5; 95% CI, 1.7-11.9), moderate to severe right atrial and right ventricular dilation (HR, 2.9; 95% CI, 1.4-5.9; and HR, 2.7; 95% CI, 1.4-5.4, respectively) and right ventricular dysfunction (HR, 5.5; 95% CI, 2.6-11.5) were associated with an increased risk of death. Higher pulmonary vascular resistance was also associated with increased mortality (HR per 1 Wood unit, 1.3; 95% CI, 1.1-1.5). These risk factors were independent of age, sex, race, height, weight, FVC, and lung transplantation status. Other hemodynamic indices, such as mean pulmonary artery pressure and cardiac index, were not associated with outcome. Conclusions: Right-sided heart size and right ventricular dysfunction measured by echocardiography and higher pulmonary vascular resistance by invasive hemodynamic assessment predict mortality in patients with IPF evaluated for lung transplantation. PMID:23450321

  18. Postoperative doppler evaluation of liver transplants

    Directory of Open Access Journals (Sweden)

    Rupan Sanyal

    2014-01-01

    Full Text Available Doppler ultrasound plays an important role in the postoperative management of hepatic transplantation, by enabling early detection and treatment of various vascular complications. This article describes the normal Doppler findings following liver transplantation and reviews the imaging appearances of various vascular complications associated with it. The article also discusses transient waveform abnormalities, often seen on a post-transplant Doppler examination, and the importance of differentiating them from findings suggestive of ominous vascular complications.

  19. Postoperative doppler evaluation of liver transplants

    Science.gov (United States)

    Sanyal, Rupan; Zarzour, Jessica G; Ganeshan, Dakshina M; Bhargava, Puneet; Lall, Chandana G; Little, Mark D

    2014-01-01

    Doppler ultrasound plays an important role in the postoperative management of hepatic transplantation, by enabling early detection and treatment of various vascular complications. This article describes the normal Doppler findings following liver transplantation and reviews the imaging appearances of various vascular complications associated with it. The article also discusses transient waveform abnormalities, often seen on a post-transplant Doppler examination, and the importance of differentiating them from findings suggestive of ominous vascular complications. PMID:25489129

  20. Can Doppler ultrasonography twinkling artifact be used as an alternative imaging modality to non-contrast-enhanced computed tomography in patients with ureteral stones? A prospective clinical study.

    Science.gov (United States)

    Sen, Volkan; Imamoglu, Cetin; Kucukturkmen, Ibrahim; Degirmenci, Tansu; Bozkurt, Ibrahim Halil; Yonguc, Tarik; Aydogdu, Ozgu; Gunlusoy, Bulent

    2017-04-01

    We aimed to evaluate the use of twinkling artifact (TA) on color Doppler ultrasonography (USG) as an alternative imaging modality to non-contrast-enhanced computed tomography (CT) in patients with ureteral stones in this prospective study. Totally, 106 consecutive patients who had been diagnosed with ureterolithiasis by CT were enrolled in this prospective study. A urinary system color Doppler ultrasonography was performed on the same day with CT by an experienced radiologist who was blinded to the CT scan. TA was graded as 0, 1 and 2. The overall specificity of TA was calculated according to the NCCT as a gold standard method. The size, side and localization of stone and the demographic characteristics of patients were compared with twinkling positivity. TA on color Doppler USG was detected in 92 (86.8 %) patients. Statistically significant difference was found between the TA and localization of ureteral stones (p = 0.044). When we sub-grouped the patients according to the TA grades as 0, 1 and 2, 14 patients were with TA grade 0, 55 with TA grade 1 and 37 with TA grade 2. The mean stone size of groups was significantly different (p = 0.012). Bigger and proximal ureteral stones tended to have more TA on color Doppler USG. TA on color Doppler USG could be a good and safe alternative imaging modality with comparable results between NCCT. It could be useful for the diagnosis and follow-up of patients with ureterolithiasis.

  1. Doppler effects on periodicities in Saturn's magnetosphere

    Science.gov (United States)

    Carbary, J. F.

    2015-11-01

    The magnetosphere of Saturn exhibits a wide variety of periodic phenomena in magnetic fields, charged particles, and radio emissions. The periodicities are observed from a moving spacecraft, so an issue arises about the periodicities being influenced by the Doppler effects. Doppler effects can be investigated using models of the periodicities and then flying the spacecraft through the model, effectively measuring any Doppler phenomena with the simulation. Using 200 days of typical elliptical orbits from the Cassini mission at Saturn, three models were tested: an azimuthal wave (or "searchlight") model, a radial wave (or "pond ripple") model, and a model of an outwardly traveling spiral wave. The azimuthal wave model produced virtually no Doppler effects in the periodicities because its wave vector is nearly perpendicular to the spacecraft trajectory. The radial wave model generated strong Doppler effects of an upshifted and a downshifted signal (a dual period) on either side of the true period, because the wave vector is either parallel or antiparallel to the spacecraft trajectory. Being intermediate to the searchlight and radial waves, the spiral wave produced Doppler effects but only for low wave speeds (<10 RS/h). For higher wave speeds the Doppler effects were not as clear. The Doppler effects can be mitigated by employing only observations beyond ~15 RS where the spacecraft speed is low compared to the wave speed. The observed periodicities over the same 200 day interval do not show evidence of Doppler effects but generally display a single feature at the expected ~10.7 h period.

  2. Color blindness and Rorschach color responsivity.

    Science.gov (United States)

    Corsino, B V

    1985-10-01

    Color vision deficits occur in 10% of the American white male population. Thus, color blindness may invalidate diagnostic hypotheses generated from Rorschach data. The Rorschach protocols of 43 white, college male color-blind subjects were compared to the protocols of normally sighted controls. The color-blind group manifested fewer pure "C" responses. No significant between group differences emerged for any of the other primary Rorschach color variables. Pure "C" responses rarely figure prominently in Rorschach evaluations, and the apparent lowered frequency of these responses by the color-blind is insufficient to warrant modification of current Rorschach practice. The data suggest that color blindness is unlikely to confound Rorschach assessment.

  3. Association of angiotensin-converting enzyme activity and polymorphism with echocardiographic measures in familial and nonfamilial hypertrophic cardiomyopathy

    Directory of Open Access Journals (Sweden)

    P.C. Buck

    2009-08-01

    Full Text Available Angiotensin-converting enzyme (ACE activity and polymorphism contribute significantly to the prognosis of patients with cardiomyopathy. The aim of this study was to determine the activity and type of ACE polymorphism in patients with familial and nonfamilial hypertrophic cardiomyopathy (HCM and to correlate these with echocardiographic measurements (echo-Doppler. We studied 136 patients (76 males with HCM (69 familial and 67 nonfamilial cases. Mean age was 41 ± 17 years. DNA was extracted from blood samples for the polymerase chain reaction and the determination of plasma ACE levels. Left ventricular mass, interventricular septum, and wall thickness were measured. Mean left ventricular mass index, interventricular septum and wall thickness in familial and nonfamilial forms were 154 ± 63 and 174 ± 57 g/m² (P = 0.008, 19 ± 5 and 21 ± 5 mm (P = 0.02, and 10 ± 2 and 12 ± 3 mm (P = 0.0001, respectively. ACE genotype frequencies were DD = 35%, ID = 52%, and II = 13%. A positive association was observed between serum ACE activity and left ventricular mass index (P = 0.04. Logistic regression showed that ACE activity was twice as high in patients with familial HCM and left ventricular mass index ≥190 g/m² compared with the nonfamilial form (P = 0.02. No other correlation was observed between ACE polymorphisms and the degree of myocardial hypertrophy. In conclusion, ACE activity, but not ACE polymorphisms, was associated with the degree of myocardial hypertrophy in the patients with HCM.

  4. Echocardiographic estimation of acute haemodynamic response during optimization of multisite pace-maker using different pacing modalities and atrioventricular delays

    Directory of Open Access Journals (Sweden)

    Šalinger-Martinović Sonja

    2009-01-01

    Full Text Available Background/Aim. Cardiac resynchronization therapy (CRT improves ventricular dyssynchrony and is associated with an improvement in symptoms, quality of life and prognosis in patients with severe heart failure and intraventricular conduction delay. Different pacing modalities produce variable activation patterns and may be a cause of different haemodynamic changes. The aim of our study was to investigate acute haemodynamic changes with different CRT configurations during optimization procedure. Methods. This study included 30 patients with severe left ventricular systolic dysfunction and left bundle branch block with wide QRS (EF 24.33 ± 3.7%, QRS 159 ± 17.3 ms, New York Heart Association III/IV 25/5 with implanted CRT device. The whole group of patients had severe mitral regurgitation in order to measure dP/dt. After implantation and before discharge all the patients underwent optimization procedure guided by Doppler echocardiography. Left and right ventricular pre-ejection intervals (LVPEI and RVPEI, interventricular mechanical delay (IVD and the maximal rate of ventricular pressure rise during early systole (max dP/dt were measured during left and biventricular pacing with three different atrioventricular (AV delays. Results. After CRT device optimization, optimal AV delay and CRT mode were defined. Left ventricular pre-ejection intervals changed from 170.5 ± 24.6 to 145.9 ± 9.5 (p < 0.001, RVPEI from 102.4 ± 15.9 to 119.8 ± 10.9 (p < 0.001, IVD from 68.1 ± 18.3 to 26.5 ± 8.2 (p < 0.001 and dP/dt from 524.2 ± 67 to 678.2 ± 88.5 (p < 0.01. Conclusion. In patients receiving CRT echocardiographic assessment of the acute haemodynamic response to CRT is a useful tool in optimization procedure. The variability of Doppler parameters with different CRT modalities emphasizes the necessity of individualized approach in optimization procedure.

  5. Traditional and innovative echocardiographic parameters for the analysis of right ventricular performance in comparison with cardiac magnetic resonance.

    Science.gov (United States)

    Focardi, Marta; Cameli, Matteo; Carbone, Salvatore Francesco; Massoni, Alberto; De Vito, Raffaella; Lisi, Matteo; Mondillo, Sergio

    2015-01-01

    Right ventricle fractional area change (RVFAC), tissue Doppler and M-mode measurements of tricuspid systolic motion [tricuspid Sm and tricuspid annular plane systolic excursion (TAPSE)], and 3D echocardiography are the current non-invasive methods for the quantification of RV systolic function; RV deformation analysis by speckle-tracking echocardiography (STE) has recently allowed the analysis of RV performance. Using cardiac magnetic resonance (CMR) as the reference standard, this study aimed at exploring the correlation between the traditional (fractional shortening, s'RV, TAPSE) and innovative (strain) echocardiographic parameters and RV ejection fraction (RVEF) measured by CMR. CMR and transthoracic echo-Doppler were performed in 63 patients referred for clinical assessment. Twenty-one presented the suspicion of myocarditis, 8 presented idiopathic dilated cardiomyopathy, 10 hypertrophic cardiomyopathy, 10 arrhythmogenic right ventricular dysplasia (ARVD), 5 infiltrative cardiomyopathy, and 9 other reasons. RVEF was measured by magnetic resonance imaging (MRI). RVFAC, tricuspid S', and TAPSE were calculated in all patients. RV longitudinal strain (RVLS) by STE was assessed by averaging RV free-wall segments (free-wall RVLS) and by averaging all segments (global RVLS). The ROC analysis was applied for the assessment of diagnostic accuracy. Good correlations were found for TAPSE, tricuspid S', and global RVLS with RVEF (r = 0.45, r = 0.52, and r = -0.71, respectively; P = 0.01 for all). Close correlations between free-wall RVLS and RVFAC with RVEF were found (r = -0.86 and r = 0.77, respectively; P < 0.0001 for both). Furthermore, free-wall RVLS demonstrated the highest diagnostic accuracy [area under curve (AUC) 0.92] and good sensitivity and specificity of 96 and 93%, respectively, to predict reduced RVEF <45%, using a cut-off value of less than -17.0%. In a heterogeneous group of patients referred to CMR evaluation, conventional (TAPSE, FAC, and tricuspid S

  6. Doppler Monte Carlo simulations of light scattering in tissue to support laser-Doppler perfusion measurements

    NARCIS (Netherlands)

    de Mul, F.F.M.; Steenbergen, Wiendelt; Greve, Jan

    1999-01-01

    Doppler Monte Carlo (DMC) simulations of the transport of light through turbid media, e.g., tissue, can be used to predict or to interpret measurements of the blood perfusion of tissue by laser‐Doppler perfusion flowmetry. We describe the physical and mathematical background of Doppler Monte Carlo

  7. Effect of Precompression on the Power Doppler Assessment of Breast Lesion Vascularity.

    Science.gov (United States)

    DeVita, Robert; Barr, Richard G

    2017-02-01

    To evaluate the effect of precompression on power Doppler visualization of blood flow in breast masses. This Institutional Review Board-approved and Health Insurance Portability and Accountability Act-compliant study evaluated 30 patients with breast masses (16 benign and 14 malignant) undergoing ultrasound-guided breast biopsy. A computational mathematics program was used to calculate the number of color pixels in a region of interest at various degrees of compression of the breast by the transducer. The amount of precompression was calculated as previously described. The percentage of color pixels compared to minimal compression was plotted against the percentage of precompression. The amount of precompression needed to decrease the number of color pixels by 50% and 100% was calculated. The differences between benign and malignant lesions were compared. The mean percentages of precompression ± SD needed to decrease the number of color voxels by 50% in were 15.9% ± 6.43% (range, 8%-30%) for benign lesions and 14.0% ± 4.17% (range, 8%-20%) for malignant lesions (P = .35). The percentages of precompression needed to decrease the number of color pixels by 100% in were 34.7% ± 12.33% (range, 23%-62%) for benign lesions and for malignant lesions 26.7% ± 3.89% (range, 18%-31%), which were statistically significant (P = .027). The amount of precompression normally used when obtaining B-mode images can substantially decrease the number of color voxels on power Doppler sonography. When performing quantitative work on Doppler evaluation of breast lesions, precompression needs to be controlled. © 2016 by the American Institute of Ultrasound in Medicine.

  8. Echocardiographic-Fluoroscopic Fusion Imaging in Transseptal Puncture: A New Technology for an Old Procedure.

    Science.gov (United States)

    Faletra, Francesco F; Biasco, Luigi; Pedrazzini, Giovanni; Moccetti, Marco; Pasotti, Elena; Leo, Laura Anna; Cautilli, Giorgio; Moccetti, Tiziano; Monaghan, Mark J

    2017-09-01

    In an era of catheter-based structural heart disease and left-side electrophysiologic interventions, transseptal puncture (TSP) is probably the most common transcatheter procedure. Experienced interventional cardiologists and electrophysiologists may safely perform TSP using fluoroscopic guidance alone. However, at present TSP is usually the first step in complex percutaneous catheter-based structural heart disease procedures and necessitate a precise site-specific TSP. Thus, in these procedures most interventional cardiologists perform TSP under fluoroscopic and two- or three-dimensional transesophageal echocardiographic guidance. The EchoNavigator system may provide a solution by fusing fluoroscopic and transesophageal echocardiographic images. In this review, the authors describe advantages and limitations of this new imaging system in guiding TSP and suggest specific echocardiographic-fluoroscopic fusion imaging perspectives that may facilitate TSP, making it potentially easier and safer. Copyright © 2017 American Society of Echocardiography. Published by Elsevier Inc. All rights reserved.

  9. The detailed assessment of left and right ventricular functions by tissue Doppler imaging in patients with familial Mediterranean fever.

    Science.gov (United States)

    Tavil, Yusuf; Ureten, Kemal; Oztürk, Mehmet Akif; Sen, Nihat; Kaya, Mehmet Güngör; Cemri, Mustafa; Cengel, Atiye

    2008-02-01

    In the contrary to other rheumatologic disorders, there have been limited numbers of studies investigating the cardiac involvement in patients with familial Mediterranean fever (FMF), although the disease may carry a potential for cardiovascular disorders because of sustained inflammation during its course. In the present study, we used high usefulness tissue Doppler echocardiography for detailed analysis of cardiac changes in FMF patients. The study population included 30 patients with FMF (11 men, 19 women; mean age, 35 +/- 7 years, mean disease duration, 15.4 +/- 7.6 years) and 30 healthy subjects as controls (12 men, 18 women; mean age, 33 +/- 7 years). The diagnosis of FMF was established according to the Tell-Hashomer criteria. Left and right ventricular functions were measured using echocardiography comprising standard two-dimensional, M-mode, and conventional Doppler as well as tissue Doppler imaging. The conventional echocardiographic paratemeters were similar apart from left ventricular relaxation time was longer (107 +/- 25 vs 85 +/- 10 ms, p < 0.001, respectively) in patients with FMF. According to the tissue Doppler measurements, while systolic velocities of both ventricles were not different, diastolic filling velocities of left ventricle including E'(m) (12.6 +/- 3.4 vs 14.7 +/- 3.3 cm/s, p = 0.04), A'(m) (10.1 +/- 2.6 vs 8.6 +/- 2.0 cm/s, p = 0.015), and E'(m)/ A'(m) (1.24 +/- 0.4 vs 1.71 +/- 0.5 cm/s, p = 0.012) values were statistically different between the groups. Left ventricular myocardial performance indices and right ventricular diastolic functions were found similar between two groups. In addition, there were no significant correlations between the disease duration, clinical features, and echocardiographic parameters. In conclusion, we have demonstrated that although systolic functions were comparable in the patients and controls, left ventricular diastolic function indices were impaired in FMF patients by using tissue Doppler analysis.

  10. Echocardiographic Monitoring of Intracardiac Hemodynamics in Neonatal Respiratory Distress Syndrome

    Directory of Open Access Journals (Sweden)

    S. A. Perepelitsa

    2010-01-01

    Full Text Available Objective: to perform an early neonatal ultrasound study of intracardiac hemodynamics in premature neonates with respiratory distress syndrome (RDS during mechanical ventilation. Subjects and methods. The paper presents the results of ultrasound study of intracardiac hemodynamics in 51 premature neonates. Two patient groups were identified. Group 1 comprised 34 infants with severe RDS who received the exogenous surfactant Curosurf and Group 2 consisted of 17 apparently healthy premature newborn infants. Results. Functional tension of the cardiovascular system was characterized for premature neonates with RDS. There were signs of left ventricular systolic dysfunction within the first 24 hours of life and those of right ventricular dysfunction by day 5 of postnatal age. Within 5 days of life, there were echocardiographic signs of pump dysfunction of both ventricles: stroke volume, cardiac index, and blood minute volume. Analysis of changes in peak blood flow velocity and peak pressure gradient across the atrioventricular valves of the right and left ventricles indicated that 17.6% of the children showed increases in peak blood flow velocity and tricuspid valve pressure gradient in the systolic phase. The greatest peak blood flow velocity changes were recorded in the pulmonary artery trunk. By day 5 of life, signs of pulmonary hypertension concurrent with hydropericardium remained in 29.4% of cases. RDS – was shown to be accompanied by higher Qp/Qs ratio in premature neonates. The lower index was attended by the alleviated signs of respiratory failure. In RDS, mainly left-to-right blood shunt was accomplished through the open oval window, but the shunt intensity decreased when the pathological process was resolved in the lung. The functioning patent ductus arteriosus was hemodynami-cally significant in none case. Conclusion. The premature neonates with RDS were found to have intracardiac hemo-dynamic changes. By day 5 of postnatal age, there was

  11. Echocardiographic predictors of mortality in patients with pulmonary hypertension and cardiopulmonary comorbidities.

    Directory of Open Access Journals (Sweden)

    Johannes Steiner

    Full Text Available We aimed to identify the echocardiographic measures associated with survival in a patient population with a high prevalence of co-morbid cardiovascular and pulmonary disease that have significantly elevated estimated pulmonary artery systolic pressures (ePASP.Pulmonary hypertension (PH is a clinical feature of several cardiopulmonary diseases that are prevalent among elderly. While certain echocardiographic parameters have been shown to be important in the prognosis in specific PH groups, the prognostic relevance of echocardiographic characteristics in a cohort with multiple cardiopulmonary comorbidities is unclear.We retrospectively identified 152 patients with ePASP > 60 mmHg by echocardiography over a five year period (6/2006-11/2011 and followed until 4/2013. Candidate clinical and echocardiographic characteristics suggestive of PH severity were compared between deceased and surviving subpopulations. Cox proportional hazard modeling was used to identify echocardiographic predictors of death adjusted for age and clinical characteristics.This was a predominantly elderly (age 78.8 ± 10.2 years, male (98.7% cohort with several cardiopulmonary comorbidities. Overall mortality was high (69.7%, median survival 129 days. After adjusting for age and clinical characteristics, decreased right ventricular (RV systolic function assessed by tricuspid annular plane systolic excursion (HR 0.56, 95% CI 0.33-0.96, p = 0.034 and increased RV thickness (HR: 4.34, 95% CI: 1.49-12.59, p = 0.007 were independently associated with mortality. In contrast, left ventricular systolic function, left ventricular diastolic parameters, ePASP, or echo-derived pulmonary vascular resistance (PVR were not associated with increased mortality.In a cohort of patients with PH and high prevalence of cardio-pulmonary comorbidities, RV systolic function and hypertrophy are associated with mortality and may be the most relevant echocardiographic markers for prognosis.

  12. Correlation between echocardiographic and morphological investigations of lesions of the tricuspid valve diagnosed during fetal life

    Science.gov (United States)

    Oberhoffer, Renate; Cook, Andrew C; Lang, Dieter; Sharland, Gurleen; Allan, Lindsey D; Fagg, Nuala L K; Anderson, Robert H

    1992-01-01

    Objective—To assess the degree of agreement between the fetal echocardiographic and postmortem examination of hearts from fetuses with severe malformations of the tricuspid valve. Design—A retrospective study to analyse echocardiographic recordings and make comparisons with postmortem findings. Setting—Tertiary referral centre for fetal echocardiography. Institute for cardiac morphology. Patients—19 cases shown to have severe malformation of the tricuspid valve by fetal echocardiography that died in the prenatal or neonatal period. Main outcome measures—Correlations between morphology and measurements made at echocardiography and necropsy. Results—The echocardiographic diagnosis was Ebstein's malformation in seven and tricuspid valvar dysplasia in 12 fetuses. These findings were confirmed in six and eight cases at necropsy. In one false positive diagnosis of Ebstein's malformation, necropsy showed dysplasia of the leaflets of the tricuspid valve without displacement. In four cases with the echocardiographic diagnosis of valvar dysplasia, necropsy showed displacement, the hallmark of Ebstein's malformation. Associated malformations that are known to worsen prognosis were predicted correctly by echocardiography. Taking the mean duration of four weeks between echocardiographic and postmortem investigations, both methods showed cardiomegaly causing lung hypoplasia, right atrial dilatation, and relative hypoplasia of the pulmonary trunk, morphometric factors that may be responsible for the poor outcome. Mostly good agreement existed between the echocardiographic and postmortem measurements if cases with an interval of more than eight weeks between the measurements were excluded. Conclusion Fetal echocardiography was proved to be a reliable technique in differentiating the variants of tricuspid valvar disease, in diagnosing associated cardiac lesions, and in predicting quantitative factors that can define the subsequent outcome. PMID:1467052

  13. Effects of reverberations and clutter filtering in pulsed Doppler using sparse sequences.

    Science.gov (United States)

    Avdal, Jørgen; Lovstakken, Lasse; Torp, Hans

    2015-05-01

    Duplex ultrasound is a modality in which an ultrasound system is used for simultaneous acquisition of both B-mode images and velocity (Doppler) data. Conventional duplex sequences interleave packets of B-mode and Doppler transmissions, producing undesirable gaps during B-mode interruptions. In recent years, several techniques have been proposed for avoiding such gaps by using sparse sequences, in which velocity spectra are generated from nonuniformly sampled Doppler data containing frequent B-mode interruptions. In this work, two negative effects are discussed that may influence velocity estimation when using nonuniformly sampled sequences. First, it is shown that long reverberation times lead to discontinuities in the signal from stationary clutter after each B-mode interruption. Second, using frequency analysis, it is shown that clutter filtering of nonuniformly sampled data may introduce artifacts in the velocity spectrum, and also lead to significant bias in mean velocity estimates. Methods are presented for quantification of these effects, and utilized to analyze three types of sparse duplex sequences for blood velocity estimation. In particular, it is argued that the use of such sequences in cardiac applications is not recommended because of long reverberation time. Additionally, it is found that the use of regression filters to filter nonuniformly sampled data may produce significant artifacts in pulsed wave Doppler spectra, but is less significant for color Doppler imaging applications. In vitro and in vivo examples are included showing the presence and magnitude of these problems in clinically relevant applications.

  14. Prosthetic mitral inflow mimicking severe aortic regurgitation (revisited). An echocardiographic challenge.

    Science.gov (United States)

    Battisha, Ayman; Abdelhaleem, Ahmed; Srialluri, Swetha; Arisha, Mohammed J; Farhoud, Adel A; Kamel, Hassan; Mahmoud, Mohamed S; Tageldin, Omar; Salama, Ahmed Y; Ibeche, Bashar; Nanda, Navin C

    2017-10-01

    Assessing aortic regurgitation (AR) severity in patients with mitral valve prosthesis may pose an echocardiographic challenge. We present a case of mild AR in whom difficulty occurred in judging its severity due to eccentric mitral prosthetic inflow signals filling practically completely the proximal left ventricular outflow tract in diastole mimicking severe AR. Frame-by-frame analysis of two-dimensional transthoracic echocardiographic images using a small sector depth and width was helpful in clarifying the true severity of AR. © 2017, Wiley Periodicals, Inc.

  15. Doppler broadening effects in plasmonic quantum dots

    Science.gov (United States)

    Alves, R. A.; Silva, Nuno A.; Costa, J. C.; Gomes, M.; Guerreiro, A.

    2017-08-01

    In this paper we analyse the effects of the Doppler shift on the optical response of a nanoplasmonic system. Through the development of a simplified model based on the Hydrodynamic Drude model we analyse the response of a quantum dot embed in a moving fluid, predicting the Doppler broadening and the shift of the spectral line.

  16. Radar Doppler Processing with Nonuniform Sampling.

    Energy Technology Data Exchange (ETDEWEB)

    Doerry, Armin W. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2017-07-01

    Conventional signal processing to estimate radar Doppler frequency often assumes uniform pulse/sample spacing. This is for the convenience of t he processing. More recent performance enhancements in processor capability allow optimally processing nonuniform pulse/sample spacing, thereby overcoming some of the baggage that attends uniform sampling, such as Doppler ambiguity and SNR losses due to sidelobe control measures.

  17. Isolated diastolic dysfunction--diagnostic value of tissue Doppler imaging, colour M-mode and N-terminal pro B-type natriuretic peptide.

    Science.gov (United States)

    Hettwer, S; Panzner-Grote, B; Witthaut, R; Werdan, K

    2007-12-01

    For diagnosis of diastolic dysfunction of the left ventricle (DDF), measurement of relaxation velocity (V(R)) by tissue Doppler imaging (V(R)), flow propagation velocity of transmitral inflow (v(p)) as well as the measurement of serum levels of N-terminal pro b-type natriuretic peptide (NT-proBNP) compete with the standard echocardiographic DDF-measures because of several disadvantages of the latter. We examined the diagnostic value of method 1, 2 and NT-proBNP in 120 patients with echocardiographic-proven DDF and in 20 patients without. Patients were classified according to the DDF-stage by standard echocardiographic parameters (transmitral E/A-ratio, deceleration time, isovolumetric relaxation time) into stage I, II and III and furthermore subdivided by the presence of dyspnoea. V(R) and v(p) were significantly lower in patients with DDF than in patients without DDF, with no difference between the various DDF stages. Symptomatic patients showed a trend to a lower V(R). NT-proBNP was elevated in patients with DDF: Symptomatic patients with a DDF at stage I and patients with a DDF at stage II and III independent of the presence of symptoms had elevated NT-proBNP levels. All three methods tested identified patients with DDF. NT-proBNP and v(p) were able to discriminate between symptomatic and asymptomatic patients.

  18. Color Relationalism and Relativism.

    Science.gov (United States)

    Byrne, Alex; Hilbert, David R

    2017-01-01

    This paper critically examines color relationalism and color relativism, two theories of color that are allegedly supported by variation in normal human color vision. We mostly discuss color relationalism, defended at length in Jonathan Cohen's The Red and the Real, and argue that the theory has insuperable problems. Copyright © 2017 Cognitive Science Society, Inc.

  19. Modeling human color categorization

    NARCIS (Netherlands)

    van den Broek, Egon; Schouten, Th.E.; Kisters, P.M.F.

    A unique color space segmentation method is introduced. It is founded on features of human cognition, where 11 color categories are used in processing color. In two experiments, human subjects were asked to categorize color stimuli into these 11 color categories, which resulted in markers for a

  20. Estimating the Doppler centroid of SAR data

    DEFF Research Database (Denmark)

    Madsen, Søren Nørvang

    1989-01-01

    After reviewing frequency-domain techniques for estimating the Doppler centroid of synthetic-aperture radar (SAR) data, the author describes a time-domain method and highlights its advantages. In particular, a nonlinear time-domain algorithm called the sign-Doppler estimator (SDE) is shown to have...... attractive properties. An evaluation based on an existing SEASAT processor is reported. The time-domain algorithms are shown to be extremely efficient with respect to requirements on calculations and memory, and hence they are well suited to real-time systems where the Doppler estimation is based on raw SAR...... data. For offline processors where the Doppler estimation is performed on processed data, which removes the problem of partial coverage of bright targets, the ΔE estimator and the CDE (correlation Doppler estimator) algorithm give similar performance. However, for nonhomogeneous scenes it is found...

  1. Observation of the Zero Doppler Effect.

    Science.gov (United States)

    Ran, Jia; Zhang, Yewen; Chen, Xiaodong; Fang, Kai; Zhao, Junfei; Chen, Hong

    2016-04-05

    The normal Doppler effect has well-established applications in many areas of science and technology. Recently, a few experimental demonstrations of the inverse Doppler effect have begun to appear in negative-index metamaterials. Here we report an experimental observation of the zero Doppler effect, that is, no frequency shift irrespective of the relative motion between the wave signal source and the detector in a zero-index metamaterial. This unique phenomenon, accompanied by the normal and inverse Doppler effects, is generated by reflecting a wave from a moving discontinuity in a composite right/left-handed transmission line loaded with varactors when operating in the near zero-index passband, or the right/left-handed passband. This work has revealed a complete picture of the Doppler effect in metamaterials and may lead to potential applications in electromagnetic wave related metrology.

  2. Echocardiographic assessment of right ventricle diastolic function in patients with multivessel coronary artery disease

    Directory of Open Access Journals (Sweden)

    Yu. S. Sinelnikov

    2017-07-01

    Full Text Available Aim. The study was aimed at assessing the right ventricle diastolic function in patients with multivessel coronary artery disease.Methods. 62 patients (32 males (51.6 % with multivessel coronary artery disease (SYNTAX Score 33.04±4.1 were examined over a period from 2014 to 2016. The mean age was 58.5±8.3 years. To examine the diastolic function of the left and right ventricles (LV, RV, conventional echocardiographic (EchoCG parameters, as well as a longitudinal diastolic strain rate at the level of RV free wall segments were analyzed by using tissue Doppler imaging in 2D strain imaging mode.Results. The systolic function of both ventricles was moderately decreased (LV EF 43.2 ± 5.5%, RV EF 42±6 %. 41 patients (66.1 % demonstrated LV diastolic dysfunction (DD, impaired relaxation of grade I and 46 patients (74.2 % – RV DD of grade I. Pseudonormal LV DD grade II was revealed in 18 patients (29 % and RV DD of grade II – in 15 patients (24.2 %. 3 patients (4.8 % had LV DD (restrictive of grade III and only 1 patient (1.6 % showed a restrictive type of RV filling. The early diastolic strain rate (ESR was 0.86±0.18 s–1 in patients with DD of grade I, the late diastolic strain rate was 0.88±0.27 s–1 (ASR, with their ratio ESR / ASR running to 0.99±0.16. For patients with DD of grade II, ESR was 0.62±0.04 s–1, ASR – 0.41±0.04 s–1 and the ratio of ESR / ASR – 1.5±0.19. For patients with DD of grade III (n = 1, ESR was 0.41 s–1, ASR – 0.2 s–1 and the ratio ESR / ASR – 2.05.  A significant inverse correlation between the coronary artery disease complexity (SYNTAX Score and the strain rate in the early diastolic phase of RV filling ESR (RS = –0.73, p = 0.001 was identified.Conclusion. Longitudinal systolic strain and diastolic strain rate decrease in parallel, thus reflecting a close relation of systolic and diastolic mechanics of the right ventricle. The intensity of right ventricle diastolic dysfunction is

  3. Left atrial mechanics: echocardiographic assessment and clinical implications.

    Science.gov (United States)

    Vieira, Maria J; Teixeira, Rogério; Gonçalves, Lino; Gersh, Bernard J

    2014-05-01

    The importance of the left atrium in cardiovascular performance has long been acknowledged. Quantitative assessment of left atrial (LA) function is laborious, requiring invasive pressure-volume loops and thus precluding its routine clinical use. In recent years, novel postprocessing imaging methodologies have emerged, providing a complementary approach for the assessment of the left atrium. Atrial strain and strain rate obtained using either Doppler tissue imaging or two-dimensional speckle-tracking echocardiography have proved to be feasible and reproducible techniques to evaluate LA mechanics. It is essential to fully understand the clinical applications, advantages, and limitations of LA strain and strain rate analysis. Furthermore, the technique's prognostic value and utility in therapeutic decisions also need further elucidation. The aim of this review is to provide a critical appraisal of LA mechanics. The authors describe the fundamental concepts and methodology of LA strain and strain rate analysis, the reference values reported with different imaging techniques, and the clinical implications. Copyright © 2014 American Society of Echocardiography. Published by Mosby, Inc. All rights reserved.

  4. Clinical utility of tissue Doppler imaging in patients with acute myocardial infarction complicated by cardiogenic shock

    Directory of Open Access Journals (Sweden)

    Zieroth Shelley

    2008-03-01

    Full Text Available Abstract Background Echocardiography is widely used in the management of patients with cardiogenic shock (CS. Left ventricular ejection fraction (EF has been shown to be an independent predictor of survival in CS. Tissue Doppler Imaging (TDI is a sensitive echocardiographic technique that allows for the early quantitative assessment of regional left ventricular dysfunction. TDI derived indices, including systolic velocity (S', early (E' and late (A' diastolic velocities of the lateral mitral annulus, are reduced in heart failure patients (EF Objective To characterize TDI derived indices in CS patients as compared to patients with chronic CHF. Methods Between 2006 and 2007, 100 patients were retrospectively evaluated who underwent echocardiography for assessment of LV systolic function. This population included: Group I 50 patients (30 males, 57 ± 13 years with chronic CHF as controls; and Group II 50 patients (29 males, 58 ± 10 years with CS. Spectral Doppler indices including peak early (E and late (A transmitral velocities, E/A ratio, and E-wave deceleration time were determined. Tissue Doppler indices including S', E' and A' velocities of the lateral annulus were measured. Results Of the entire cohort, the mean LVEF was 25 ± 5%. Cardiogenic shock patients demonstrated significantly lower lateral S', E' and a higher E/E' ratio (p Conclusion Despite similar reduction in LV systolic function, CS patients have reduced myocardial velocities and higher filling pressures using TDI, as compared to CHF patients. Whether TDI could be a reliable tool to determine CS patients with the best chance of recovery following revascularization is yet to be determined.

  5. Doppler ultrasonographic assessment of uterine arteries during normal canine puerperium.

    Science.gov (United States)

    Batista, P R; Gobello, C; Corrada, Y; Pons, E; Arias, D O; Blanco, P G

    2013-10-01

    The aim of this study was to describe Doppler ultrasonographic changes of uterine arteries during normal canine puerperium. Eight healthy, pure-bred bitches, were ultrasonographically assessed during the postpartum period on Days -3, 3, 10, 17, 24, 38, 52 and 80 (Day 0 defined as the day of parturition). Total horn diameters (TD) and endometrium thickness (E) were evaluated. Color Doppler was used to localize uterine arteries at both sides of the body and pulsed-wave Doppler was performed to obtain the waveforms. Peak systolic velocity (PSV) and end diastolic velocity (EDV) were measured. Resistance index [(PSV-EDV)/PSV] was automatically calculated. Values of TD, E, PSV, EDV and RI were analyzed by repeated measures ANOVA followed by LSD test (SPSS 18.0; SPSS, Chicago, IL, USA). A correlation analysis was also carried out between RI and TD. A progressive decrease of TD (P<0.01) and E (P<0.01) was found in the course of the study. A gradual diminution of PSV (P<0.01) and EDV (P<0.01) and an increase of RI (P<0.01) were also found throughout the study period. The resistance index negatively correlated with TD (r=-0.46; P<0.01) and E (r=-0.44; P<0.01) while the ultrasonographic and vascular changes in this period are concurrent with regenerative changes in the glandular and epithelial structures of the uterus. It is concluded that uterine artery RI progressively increased during normal canine puerperium, associated to the two-dimensional ultrasonographic regression of the organ. Copyright © 2013 Elsevier B.V. All rights reserved.

  6. Embedding Color Watermarks in Color Images

    Directory of Open Access Journals (Sweden)

    Wu Tung-Lin

    2003-01-01

    Full Text Available Robust watermarking with oblivious detection is essential to practical copyright protection of digital images. Effective exploitation of the characteristics of human visual perception to color stimuli helps to develop the watermarking scheme that fills the requirement. In this paper, an oblivious watermarking scheme that embeds color watermarks in color images is proposed. Through color gamut analysis and quantizer design, color watermarks are embedded by modifying quantization indices of color pixels without resulting in perceivable distortion. Only a small amount of information including the specification of color gamut, quantizer stepsize, and color tables is required to extract the watermark. Experimental results show that the proposed watermarking scheme is computationally simple and quite robust in face of various attacks such as cropping, low-pass filtering, white-noise addition, scaling, and JPEG compression with high compression ratios.

  7. Abnormal uterine bleeding due to vascular abnormality caused by D and E : doppler sonography for diagnosis and transcatheter arterial embolization for treatment

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Yong Jo; Heo, Chan; Jung, Tae Gun; Kim, Gi Sung; Kwon, Hyeok Po; Lee, Sang Kwon; Kwon, Jung Hyeok [Dongkang Hospital, Ulsan (Korea, Republic of); Lee, Yeong Hwan [Taegu Catholic Univ. School of Medicine, Taegu (Korea, Republic of)

    1996-06-01

    We attempted to evaluate the usefulness of Doppler sonography in the diagnosis of uterine vascular abnormality caused by previous D and E, and to report that transarterial embolization is an excellent treatment modality. We analyzed gray-scale US, color/duplex Doppler US and angiographic findings in seven patients with radiologically proven uterine vascular abnormality. Two of the seven cases were pseudoaneurysms and five of the seven cases were AVMs. n one of the AVMS, two small pseudoaneurysms were combined. In all cases, transarterial embolizations using 3 mm coil or/and gelfoam particles were performed. Follow-up US studies, including color Doppler US, were performed. on color/duplex Doppler sonography, two cases of pseudoaneurysm showed blood pools with turbulent arterial flow, and five cases of AVM showed asymmetrically increased cascularity, with vailable high velocities composed of the pulsatile arterial flow, with a high diastolic component. on angiography, the former showed pseudoaneruysmal sacs, and the latter densely opacified vascular tangles. No more abnormal uterine bleeding was shown following transarterial embolization in all cases. Color/duplex Doppler sonography was valuable in the diagnosis or treatment of abnormal uterine bleeding caused by uterine vascular abnormality such as acquired AVM or pseudoaneruysm.

  8. Colored Contact Lens Dangers

    Medline Plus

    Full Text Available ... Halloween is a popular time for people to use colored contact lenses to enhance their costumes. From ... Blurry Vision and Daily Eye Drops After One Use Facts About Colored Contacts and Halloween Safety Colored ...

  9. Colored Contact Lens Dangers

    Medline Plus

    Full Text Available ... People, Real Problems with Colored Contact Lenses Julian: Teenager Blinded In One Eye By Non-Prescription Contact ... colored contact lenses , from the U.S. Food and Drug Administration (FDA). Are the colored lenses you are ...

  10. Colored Contact Lens Dangers

    Medline Plus

    Full Text Available ... is far from the truth." Real People, Real Problems with Colored Contact Lenses Julian: Teenager Blinded In ... colored contact lenses , from the U.S. Food and Drug Administration (FDA). Are the colored lenses you are ...

  11. Colored Contact Lens Dangers

    Medline Plus

    Full Text Available ... One Use Facts About Colored Contacts and Halloween Safety Colored Contact Lens Facts Over-the-Counter Costume ... Costume Contact Lenses Can Ruin Vision Eye Makeup Safety In fact, it is illegal to sell colored ...

  12. Segmentation of the heart muscle in 3-D pediatric echocardiographic images.

    NARCIS (Netherlands)

    Nillesen, M.M.; Lopata, R.G.P.; Gerrits, I.H.; Kapusta, L.; Huisman, H.J.; Thijssen, J.M.; Korte, C.L. de

    2007-01-01

    This study aimed to show segmentation of the heart muscle in pediatric echocardiographic images as a preprocessing step for tissue analysis. Transthoracic image sequences (2-D and 3-D volume data, both derived in radiofrequency format, directly after beam forming) were registered in real time from

  13. Echocardiographic Applications in the Diagnosis and Management of Patients with ARVC

    NARCIS (Netherlands)

    Mast, Thomas P.|info:eu-repo/dai/nl/41396664X; Teske, Arco J.|info:eu-repo/dai/nl/314003231; Doevendans, Pieter A.|info:eu-repo/dai/nl/164248366; Cramer, Maarten J.|info:eu-repo/dai/nl/155240706

    2016-01-01

    Arrhythmogenic right ventricular cardiomyopathy/dysplasia (ARVC/D) is a genetically determined myocardial disease predominantly affecting the right ventricle (RV). There is no single gold standard for the diagnosis of ARVC/D. New echocardiographic tools such as tissue deformation imaging allow

  14. Bedside percutaneous transseptal mitral commissurotomy under sole transthoracic echocardiographic guidance in a critically ill patient.

    Science.gov (United States)

    Trehan, Vijay K; Nigam, Arima; Mukhopadhyay, Saibal; Yusuf, Jamal; UmaMahesh, C R; Gupta, Mohit D; Girish, Menahalli Palleda; Sharma, Manish

    2006-04-01

    Percutaneous transvenous mitral commissurotomy is an effective and safe alternative to surgical treatment, in selected patients of rheumatic mitral stenosis. It is usually performed under fluoroscopic guidance in the catheterization laboratory. We report the successful performance of emergency mitral commissurotomy by the Inoue balloon at bedside under sole transthoracic echocardiographic guidance in a critically ill patient.

  15. Sequence of echocardiographic changes during development of right ventricular failure in rat

    NARCIS (Netherlands)

    Hardziyenka, Maxim; Campian, Maria E.; de Bruin-Bon, H. A. C. M. Rianne; Michel, Martin C.; Tan, Hanno L.

    2006-01-01

    BACKGROUND: The temporal relations between the onset of echocardiographic changes and clinical diagnosis of right ventricular (RV) failure are unresolved. We have characterized such relations in a rat monocrotaline (MCT) model of RV failure. METHODS: Eight-week-old male Wistar rats were injected

  16. Sequence of echocardiographic changes during development of right ventricular failure in rat.

    Science.gov (United States)

    Hardziyenka, Maxim; Campian, Maria E; de Bruin-Bon, H A C M Rianne; Michel, Martin C; Tan, Hanno L

    2006-10-01

    The temporal relations between the onset of echocardiographic changes and clinical diagnosis of right ventricular (RV) failure are unresolved. We have characterized such relations in a rat monocrotaline (MCT) model of RV failure. Eight-week-old male Wistar rats were injected with MCT (60 mg/kg) or vehicle and underwent serial echocardiography. RV free-wall thickness (RVWT), pulmonary artery acceleration time normalized to cycle length (PAAT/CL), RV end-diastolic diameter (RVEDD), and tricuspid annular plane systolic excursion (TAPSE) were measured. Significant differences in echocardiographic parameters between MCT-treated and control rats were found as early as 14 days before RV failure for RVWT, 10 days for PAAT/CL, and 7 days for RVEDD and TAPSE. The time intervals between the onset of changes in RVWT, PAAT/CL, RVEDD, and TAPSE and diagnosis of RV failure were 11.3 +/- 0.8, 10.9 +/- 0.7, 6.5 +/- 0.5, and 5.4 +/- 0.7 days, respectively. The sequence of echocardiographic changes was consistent in all animals during development of RV failure. Pulmonary hypertension (assessed by PAAT/CL) and RV free-wall thickening (characterized by RVWT) precede RV dilation and RV systolic dysfunction (measured by RVEDD and TAPSE, respectively). Echocardiographic analysis permits accurate determination of the stage of disease development in MCT-induced RV failure.

  17. Echocardiographic findings in haemodialysis patients according to their state of hydration

    Directory of Open Access Journals (Sweden)

    María Cristina Di Gioia

    2017-01-01

    Conclusions: We found that left atrial volume index determined by echocardiographic Area-length method, but not left ventricle hypertrophy or dimensions of cavities, are related on hydration status based on bioimpedance measured time-averaged fluid overload (TAFO, and not with FO/ECW.

  18. Traumatic aortic transection with intraluminal aortic fat: transesophageal echocardiographic characteristics and implications.

    Science.gov (United States)

    Sumner, Andrew D; Bobin, John J; Mehta, Sanjay; Stephenson, Edward R

    2003-11-01

    Aortic transection can be a catastrophic complication of blunt chest trauma. Transesophageal echocardiography is a useful tool for assessing aortic pathology. Presented is a case of traumatic aortic transection in which periaortic fat was found within the aortic lumen. Transesophageal echocardiographic characteristics are reviewed and clinical implications discussed.

  19. Modeling envelope statistics of blood and myocardium for segmentation of echocardiographic images.

    NARCIS (Netherlands)

    Nillesen, M.M.; Lopata, R.G.P.; Gerrits, I.H.; Kapusta, L.; Thijssen, J.M.; Korte, C.L. de

    2008-01-01

    The objective of this study was to investigate the use of speckle statistics as a preprocessing step for segmentation of the myocardium in echocardiographic images. Three-dimensional (3D) and biplane image sequences of the left ventricle of two healthy children and one dog (beagle) were acquired.

  20. Reference values of M-mode echocardiographic parameters and indices in conscious Labrador Retriever dogs.

    Science.gov (United States)

    Gugjoo, M B; Hoque, M; Saxena, A C; Shamsuz Zama, M M; Dey, S

    2014-01-01

    Breed-wise standard echocardiographic values in dogs have been reported as there is variation in body and chest conformation which limits the application of data of one breed for other breed. Labrador Retrievers being originated from hunting dogs, might have different echocardiographic values from standard normal range of other dog breeds. So, the present study was aimed to determine the M-mode echocardiographic reference ranges in Labrador Retriever dogs and to evaluate the effect of body weight and gender on these parameters. The data obtained were also compared with that of the other dog breeds. Conscious clinically healthy Labrador Retriever dogs (n=24) of both sexes were made the subject of the study. All the measurements were made from a right parasternal long axis left ventricular outflow tract view and the parameters measured were: left ventricular dimensions, left ventricular function, left ventricular volumes, left atrial and aortic root diameter and mitral valve parameters. Data obtained were also compared with that available for other dog breeds. Significant correlation (P0.5); moderate for LVPWd, LVPWs, EPSS, EF Slope and SV (r=0.3 to 0.5); weak for EDV and ESV (r<0.3). Non-significant effect of gender was seen on all the echocardiographic parameters. However, some of the parameters had a significant breed effect. It is expected that the obtained data will be valuable for the progress of studies on small animal cardiology.

  1. Digital color imaging

    CERN Document Server

    Fernandez-Maloigne, Christine; Macaire, Ludovic

    2013-01-01

    This collective work identifies the latest developments in the field of the automatic processing and analysis of digital color images.For researchers and students, it represents a critical state of the art on the scientific issues raised by the various steps constituting the chain of color image processing.It covers a wide range of topics related to computational color imaging, including color filtering and segmentation, color texture characterization, color invariant for object recognition, color and motion analysis, as well as color image and video indexing and retrieval. <

  2. Quantification of mitral regurgitation on cardiac computed tomography: comparison with qualitative and quantitative echocardiographic parameters.

    LENUS (Irish Health Repository)

    Arnous, Samer

    2012-02-01

    PURPOSE: To assess whether cardiac computed tomographic angiography (CCTA) can quantify the severity of chronic mitral regurgitation (MR) compared to qualitative and quantitative echocardiographic parameters. MATERIALS AND METHODS: Cardiac computed tomographic angiography was performed in 23 patients (mean +\\/- SD age, 63 +\\/- 16 years; range, 24-86 years) with MR and 20 patients without MR (controls) as determined by transthoracic echocardiography. Multiphasic reconstructions (20 data sets reconstructed at 5% increments of the electrocardiographic gated R-R interval) were used to analyze the mitral valve. Using CCTA planimetry, 2 readers measured the regurgitant mitral orifice area (CCTA ROA) during systole. A qualitative echocardiographic assessment of severity of MR was made by visual assessment of the length of the regurgitant jet. Quantitative echocardiographic measurements included the vena contracta, proximal isove