Multislice computed tomography: angiographic emulation versus standard assessment for detection of coronary stenoses

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Schnapauff, Dirk; Hamm, Bernd; Dewey, Marc [Humboldt-Universitaet zu Berlin, Department of Radiology, Charite - Universitaetsmedizin Berlin, Chariteplatz 1, P.O. Box 10098, Berlin (Germany); Duebel, Hans-Peter; Baumann, Gert [Charite - Universitaetsmedizin Berlin, Department of Cardiology, Berlin (Germany); Scholze, Juergen [Charite - Universitaetsmedizin Berlin, Charite Outpatient Centre, Berlin (Germany)

2007-07-15

The present study investigated angiographic emulation of multislice computed tomography (MSCT) (catheter-like visualization) as an alternative approach of analyzing and visualizing findings in comparison with standard assessment. Thirty patients (120 coronary arteries) were randomly selected from 90 prospectively investigated patients with suspected coronary artery disease who underwent MSCT (16-slice scanner, 0.5 mm collimation, 400 ms rotation time) prior to conventional coronary angiography for comparison of both approaches. Sensitivity and specificity of angiographic emulation [81% (26/32) and 93% (82/88)] were not significantly different from those of standard assessment [88% (28/32) and 99% (87/88)], while the per-case analysis time was significantly shorter for angiographic emulation than for standard assessment (3.4 {+-} 1.5 vs 7.0 {+-} 2.5 min, P < 0.001). Both interventional and referring cardiologists preferred angiographic emulation over standard curved multiplanar reformations of MSCT coronary angiography for illustration, mainly because of improved overall lucidity and depiction of sidebranches (P < 0.001). In conclusion, angiographic emulation of MSCT reduces analysis time, yields a diagnostic accuracy comparable to that of standard assessment, and is preferred by cardiologists for visualization of results. (orig.)

Coronary angiographic characteristics that influence fractional flow reserve.

Science.gov (United States)

Natsumeda, Makoto; Nakazawa, Gaku; Murakami, Tsutomu; Torii, Sho; Ijichi, Takeshi; Ohno, Yohei; Masuda, Naoki; Shinozaki, Norihiko; Ogata, Nobuhiko; Yoshimachi, Fuminobu; Ikari, Yuji

2015-01-01

Percutaneous coronary intervention (PCI) guided with fractional flow reserve (FFR) has been shown to improve clinical outcome. Although coronary angiography is the standard method for PCI guidance, the visual severity of stenosis is not always correlated with functional severity, suggesting that there are additional angiographic factors that affect functional ischemia. To evaluate angiographic predictors of positive FFR in stenotic lesions, angiographic characteristics of 260 consecutive patients (362 lesions) who underwent FFR testing from April 2009 to September 2012 were analyzed. A scoring system (STABLED score) using these predictors was developed and compared with quantitative coronary angiography (QCA). %Diameter stenosis >50% (OR, 8.43; P20 mm (OR, 5.40; P=0.0002), and distance from ostium <20 mm (OR, 1.94; P=0.028) were determined as independent predictors of positive FFR. Area under the ROC curve for probability of positive FFR using the STABLED score (Stenosis 2 points, TAndem lesion 1 point, Bifurcation 1 point, LEsion length 1 point, Distance from ostium 1 point) was 0.85, higher than that for QCA stenosis alone (0.76). STABLED score ≥3 had 72.3% sensitivity and 83.6% specificity for predicting positive FFR, and PPV was 76.7%. Specific angiographic features are applicable for predicting functional ischemia. STABLED score correlates well with FFR.

Superselective angiographic findings and the blood supply in the cases of avascular necrosis of the femoral head: a preliminary study

International Nuclear Information System (INIS)

Zhou Weisheng; Wang Fangjun; Ling Yisheng; Zhao Tianqing

2003-01-01

Objective: To study the superselective angiographic findings and blood supply in the case of avascular necrosis of the femoral head (ANFH). Methods: One hundred and sixty five patients (214 hips) with ANFH proved by clinic and radiology underwent superselective angiography and DSA findings were retrospectively studied. Results: Abnormal angiographic findings of the medial circumflex artery and its branches, with or without other abnormal vascularities, could be obtained in 162 hips out of 211 (98.6%). Angiographic findings of ANFH were the followings: abnormal superior and inferior capsular branch of the medial circumflex artery, especially the former one; abnormalities in the ascending branch of lateral circumflex artery; opacification of the femoral head and neck in the parenchymal phase of DSA; revasculization of the small arterial branches or a hypervascular area surrounding the necrotic lesions; anastomosis between the medial circumflex artery and the inferior and superior gluteal arteries; and the venous stasis. Conclusion: Morphological changes of blood vessels in ANFH are demonstrated by superselective angiography, in which the medial circumflex artery and its branches are mostly involved, or in some cases, accompanied by venous stasis

Shock Index Correlates with Extravasation on Angiographs of Gastrointestinal Hemorrhage: A Logistics Regression Analysis

International Nuclear Information System (INIS)

Nakasone, Yutaka; Ikeda, Osamu; Yamashita, Yasuyuki; Kudoh, Kouichi; Shigematsu, Yoshinori; Harada, Kazunori

2007-01-01

We applied multivariate analysis to the clinical findings in patients with acute gastrointestinal (GI) hemorrhage and compared the relationship between these findings and angiographic evidence of extravasation. Our study population consisted of 46 patients with acute GI bleeding. They were divided into two groups. In group 1 we retrospectively analyzed 41 angiograms obtained in 29 patients (age range, 25-91 years; average, 71 years). Their clinical findings including the shock index (SI), diastolic blood pressure, hemoglobin, platelet counts, and age, which were quantitatively analyzed. In group 2, consisting of 17 patients (age range, 21-78 years; average, 60 years), we prospectively applied statistical analysis by a logistics regression model to their clinical findings and then assessed 21 angiograms obtained in these patients to determine whether our model was useful for predicting the presence of angiographic evidence of extravasation. On 18 of 41 (43.9%) angiograms in group 1 there was evidence of extravasation; in 3 patients it was demonstrated only by selective angiography. Factors significantly associated with angiographic visualization of extravasation were the SI and patient age. For differentiation between cases with and cases without angiographic evidence of extravasation, the maximum cutoff point was between 0.51 and 0.0.53. Of the 21 angiograms obtained in group 2, 13 (61.9%) showed evidence of extravasation; in 1 patient it was demonstrated only on selective angiograms. We found that in 90% of the cases, the prospective application of our model correctly predicted the angiographically confirmed presence or absence of extravasation. We conclude that in patients with GI hemorrhage, angiographic visualization of extravasation is associated with the pre-embolization SI. Patients with a high SI value should undergo study to facilitate optimal treatment planning

Angiographic findings of hepatocellular carcinoma

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Han, Man Chung; Cho, Byung Jae; Huh, Seung Jae; Bae, Sang Hoon; Kim, Ung Jin; Kim, Chung Yong; Kim, Noe Kyeong [Yonsei University College of Medicine, Seoul (Korea, Republic of)

1985-12-15

From March 1977 to July 1979, 69 cases of angiograms of hepatocellular carcinoma were observed in Seoul National University Hospital. The findings of selective celiac and/or hepatic arteriography in total 69 cases of confirmed hepatocellular carcinoma, with clinical and laboratory findings, were analyzed. The summarized results are as follows; 1. Among 69 cases od hepatoma, 62 were male and 7 were female with sex ratio of 8.9 : 1. Peak incidence is 5th to 7th decades (72.5%). Epigastric pain, indigestion, and palpable mass in right upper quadrant were common symptoms and sign. Laboratory findings showed elevated serum alkaline phosphatase more than 5 Bodansky unit in 75.4%. Alpha-feto protein was positive in 65.2% of all the patients. 2 All 69 cases were classified into 31 cases of massive type, 22 cases of diffuse type, and 16 cases of nodular type, in accordance with angiographic gross anatomy. The frequency of angiographic findings were hypervascularities and tumor vessels (100%), tumor stainings (98.5%), arteriovenous shunt (71.0%), displacement of intrahepatic arteries (66.7%), vascular lakes and channel (59.4%). Encasement of hepatic artery and portal vein regurgitation was respectively 4 cases. Tumor mass in portal vein were 6 cases and tumor mass in hepatic vein was 1 case. 3. Intraarterial infusion of 5-FU was performed in 15 hepatoma patients, and the results were that angiographic improvement was demonstrated in 3 cases, no improvement in 8 cases, and incomplete infusion in 4 cases. 4. The selective celiac and/or hepatic angiograms are excellent diagnostic tools as well as therapeutic management for intraarterial infusion of anticancerous drugs.

Angiographic findings of hepatocellular carcinoma

International Nuclear Information System (INIS)

Han, Man Chung; Cho, Byung Jae; Huh, Seung Jae; Bae, Sang Hoon; Kim, Ung Jin; Kim, Chung Yong; Kim, Noe Kyeong

1985-01-01

From March 1977 to July 1979, 69 cases of angiograms of hepatocellular carcinoma were observed in Seoul National University Hospital. The findings of selective celiac and/or hepatic arteriography in total 69 cases of confirmed hepatocellular carcinoma, with clinical and laboratory findings, were analyzed. The summarized results are as follows; 1. Among 69 cases od hepatoma, 62 were male and 7 were female with sex ratio of 8.9 : 1. Peak incidence is 5th to 7th decades (72.5%). Epigastric pain, indigestion, and palpable mass in right upper quadrant were common symptoms and sign. Laboratory findings showed elevated serum alkaline phosphatase more than 5 Bodansky unit in 75.4%. Alpha-feto protein was positive in 65.2% of all the patients. 2 All 69 cases were classified into 31 cases of massive type, 22 cases of diffuse type, and 16 cases of nodular type, in accordance with angiographic gross anatomy. The frequency of angiographic findings were hypervascularities and tumor vessels (100%), tumor stainings (98.5%), arteriovenous shunt (71.0%), displacement of intrahepatic arteries (66.7%), vascular lakes and channel (59.4%). Encasement of hepatic artery and portal vein regurgitation was respectively 4 cases. Tumor mass in portal vein were 6 cases and tumor mass in hepatic vein was 1 case. 3. Intraarterial infusion of 5-FU was performed in 15 hepatoma patients, and the results were that angiographic improvement was demonstrated in 3 cases, no improvement in 8 cases, and incomplete infusion in 4 cases. 4. The selective celiac and/or hepatic angiograms are excellent diagnostic tools as well as therapeutic management for intraarterial infusion of anticancerous drugs.

Effect of glycoprotein IIb/IIIa receptor inhibition on angiographic complications during percutaneous coronary intervention in the ESPRIT trial.

Science.gov (United States)

Blankenship, J C; Tasissa, G; O'Shea, J C; Iliadis, E A; Bachour, F A; Cohen, D J; Lui, H K; Mann, T; Cohen, E; Tcheng, J E

2001-09-01

We sought to determine whether eptifibatide decreases the incidence of in-laboratory angiographic complications and to determine the relationship of angiographically evident complications to elevations of creatine kinase-MB (CK-MB) enzyme levels during percutaneous coronary intervention. In the Enhanced Suppression of the Platelet IIb/IIIa Receptor with Integrilin Therapy (ESPRIT) trial, eptifibatide during coronary intervention was associated with decreased ischemic complications at 48 h and 30 days. Patients (n = 2,064) were randomized to placebo versus eptifibatide (two 180 microg/kg boluses 10 min apart and as a continuous infusion of 2 microg/kg per min) during percutaneous coronary stenting. Angiographic complications including major dissection, distal embolization, residual thrombus, abrupt closure, residual stenosis >50% and side-branch occlusion were prospectively recorded by the operator. Creatine kinase-MB levels were measured after the procedure and every 6 h thereafter. The incidence of angiographic complications and CK-MB elevation was determined for eptifibatide versus placebo groups. Eptifibatide-treated patients demonstrated nonsignificant trends toward fewer angiographic complications (10 vs. 12% for placebo patients, p = 0.13) and, for patients with angiographic complications, fewer subsequent CK-MB elevations (43 vs. 50% for placebo patients, p = 0.31). In patients without any angiographic complications, the incidence of CK-MB elevation >3 times the normal was 7% with placebo and 4% with eptifibatide (p = 0.003). Eptifibatide during nonurgent coronary stent intervention only minimally (and insignificantly) reduces the incidence of angiographic complications and subsequent CK-MB elevations in patients developing an angiographic complication. The greater effect is to reduce myocardial infarction in patients undergoing otherwise uneventful coronary stent implantation as well as in the overall study population.

Accessory left gastric artery: angiographic anatomy

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Lee, Kang Soo; Lim, Hyung Guhn; Kim, Hong Soo; Jeon, Doo Sung [Presbyterian Medical Center, Chunju (Korea, Republic of); Chung, Jin Wook; Park, Jae Hyung [College of Medicine and the Institute of Radiation Medicine, Seoul National University, Seoul (Korea, Republic of); Song, Soon Young [Myongji Hospital, College of Medicine, Kwandong University, Seoul (Korea, Republic of)

2000-09-01

To evaluate the angiographic anatomy of the accessory left gastric artery (accLGA). We evaluated the angiographic findings of the accLGA in 50 patients (Angiostar; Siemens, Erlangen, Germany). Performing celiac and selective angiography in 50 and 34 patients, respectively. By means of celiac angiography, (1) site of origin, (2) anatomical course, (3) diameter, (4) degree of tortuosity, and (5) distal tapering were evaluated, while selective angiography was used to determine (1) arterial branching, (2) area of blood supply, and (3) patterns of gastric wall stain. Celiac angiography showed that the accLGA arose from the left hepatic artery (LHA) in 45 cases (90%) and from the proper hepatic artery in five (10%). If the accLGA arose from the LHA, its origin entirely depended on the branching pattern of the latter. It always arose from the lateral branch of the LHA furthest to the left and uppermost, and proximal to its umbilical point. The most common anatomical course of the accLGA, seen in 27 cases (54%), was between the S2 and S3 segmental branch. The diameter and degree of tortuosity of the accLGA were similar to those of adjacent intrahepatic branches in 21 (42%) and 33 cases (66%), respectively. The degree of tapering was less than that of adjacent intrahepatic vessel in 28 (56%). Selective angiography demonstrated esophageal branching of the acc LGA in 27 cases (79%), inferior phrenic arterial branching in three (9%), a mediastinal branch in one (3%), and hypervascularity of the lung in one (3%). In 15 cases (44%), bifurcation of the accLGA was recognized. The vascular territory of the accLGA was the gastric fundus together with the distal esophagus in 21 cases (62%), mainly the gastric fundus in six (18%), and mainly the distal esophagus in four (12%). The pattern of gastric mucosal stain was curvilinear wall in 31 cases (91%) and nodular in three (9%). A knowledge of the angiographic anatomy of the accLGA facilitates accurate recognition of this artery on

A simple digital subtraction angiographic instrument

International Nuclear Information System (INIS)

Ando, Hiroshi; Kobayashi, Tsuyoshi; Imai, Yutaka; Yanagishita, Akira

1983-01-01

A digital subtraction angiographic instrument was manufactured using a conventional x-ray TV for gastrointestinal series and a computer for processing of nuclear medical data. The results of visualization of the aorta and its primary branches were reviewed with demonstrable cases. (Chiba, N.)

An angiographic study of left- and right-ventricular function in patients with alcoholic heart and dilatation cardiomyopathy

International Nuclear Information System (INIS)

Savchenko, A.P.; Samko, A.N.; Smetnev, A.S.; Grudtsyn, G.V.

1986-01-01

An angiographic study of left- and right-ventricular function in 57 patients with alcoholic heart and dilatation cardiomyopathy demonstrated preclinical disorders of left-ventricular myocardial contractility and more marked right-ventricular changes in patients with second-stage chronic alcoholism. In cases of dilatation cardiomyopathy, left-ventricular dysfunction was predominant, while right-venricular changes were less pronouced

Angiographic validation of the American College of Cardiology Foundation-the Society of Thoracic Surgeons Collaboration on the Comparative Effectiveness of Revascularization Strategies study.

Science.gov (United States)

Chakrabarti, Anjan K; Grau-Sepulveda, Maria V; O'Brien, Sean; Abueg, Cassandra; Ponirakis, Angelo; Delong, Elizabeth; Peterson, Eric; Klein, Lloyd W; Garratt, Kirk N; Weintraub, William S; Gibson, C Michael

2014-02-01

The goal of this study was to compare angiographic interpretation of coronary arteriograms by sites in community practice versus those made by a centralized angiographic core laboratory. The study population consisted of 2013 American College of Cardiology-National Cardiovascular Data Registry (ACC-NCDR) records with 2- and 3- vessel coronary disease from 54 sites in 2004 to 2007. The primary analysis compared Registry (NCDR)-defined 2- and 3-vessel disease versus those from an angiographic core laboratory analysis. Vessel-level kappa coefficients suggested moderate agreement between NCDR and core laboratory analysis, ranging from kappa=0.39 (95% confidence intervals, 0.32-0.45) for the left anterior descending artery to kappa=0.59 (95% confidence intervals, 0.55-0.64) for the right coronary artery. Overall, 6.3% (n=127 out of 2013) of those patients identified with multivessel disease at NCDR sites had had 0- or 1-vessel disease by core laboratory reading. There was no directional bias with regard to overcall, that is, 12.3% of cases read as 3-vessel disease by the sites were read as <3-vessel disease by the core laboratory, and 13.9% of core laboratory 3-vessel cases were read as <3-vessel by the sites. For a subset of patients with left main coronary disease, registry overcall was not linked to increased rates of mortality or myocardial infarction. There was only modest agreement between angiographic readings in clinical practice and those from an independent core laboratory. Further study will be needed because the implications for patient management are uncertain.

Intractable epistaxis: which arteries are responsible? An angiographic study.

Science.gov (United States)

de Bonnecaze, Guillaume; Gallois, Y; Chaynes, P; Bonneville, F; Dupret-Bories, A; Chantalat, E; Serrano, E

2017-11-01

Epistaxis constitutes a significant proportion of the Otolaryngologist's emergency workload. Optimal management differs in relation to the anatomic origin of the bleeding. The outcome of our study was to determine which artery(ies) could be considered as the cause of severe bleeding in the context of severe epistaxis. Fifty-five procedures of embolization preceded by angiography were reviewed. Medical records of interventionally treated patients were analysed for demographics, medical history, risk factors and clinical data. Angiographic findings were also assessed for active contrast extravasation (blush), vascular abnormality and embolised artery. Previous angiography showed an active contrast extravasation in only 20 procedures. The most common bleeding source was the sphenopalatine artery (SPA) followed by anterior ethmoïdal artery (AEA) and facial artery. Majority of multiple or bilateral extravasations occured in patients with systemic factors. A better understanding of the potential bleeding source might help and limit the risk of treatment failures. Our study confirms that the SPA is the most common cause of severe bleeding. We also emphasise the role of the AEA not only in traumatic context. Others arteries are rarely involved except in patients with comorbidities or frequent recurrences.

CT, MR and angiographic findings of hemangiopericytomas

International Nuclear Information System (INIS)

Lim, Soo Mee; Lee, Ho Kyu; Shin, Ji Hoon; Kim, Jae Kyun; Kim, Dae Hong; Choi, Choong Gon; Suh, Dae Chul

1999-01-01

Hemangiopericytoma(HP) exhibits its pathologic findings different from those of meningioma or other angiomatous tumor; and its clinical behavior is unique and prognosis worse than other cases. We reviewed the CT, MR and angiographic findings of HPs and evaluated differential radiologic points of comparison between typical meningiomas and meningeal HPs. MR(n=16), CT(n=5) and angiographic imaging(n=10) were performed in 18 patients(M:F = 12:6, mean age: 45 years) with histologically proven primary HPs. We evaluated the imaging findings of HPs with respect to site, shape, size, signal intensity, enhancement characteristics, vascular signal voids, calcification, bony and adjacent sinus involvement, and angiographic findings. HPs were meningeal in 14 cases and nonmeningeal in four. Meningeal HPs were located in the parasagittal region(n=8), convexity(n=3), intradural extramedullary space(n=1), choroid plexus(n=1), and olfactory groove(n=1). Nonmeningeal HPs were located in the masticator space(n=2), paraspinal area(n=1) and supraclavicular area(n=1). The mean maximal dimension of tumors was about 5.4cm and their shape was papillary(n=8) or lobulated(n=7). MR images showed high(n=13) or iso(n=3) signal intensities on T2W1, and heterogeneity on T2W1(n=9). Vascular signal voids in the mass were seen in all cases, while in two cases, CT scanning showed nodular dense calcification. Bone destruction was present in six cases, but no hyperostosis was found. In five cases, the superior sagittal sinus was involved. Angiographic images revealed highly vascular masses supplied by the internal carotid artery(n=5), external carotid artery(n=8), descending scapular artery(n=1) and radiculomedullary artery(n=1), with delayed tumor blush during the capillary and venous phase in which there was no arteriovenous shunt. HP is one of the extra-axial tumors in which there is hypervascularity, aggressive bony destruction arising in the meningeal and extrameningeal area, and heterogeneous high

Hepatic angiographic findings of ruptured hepatocellular carcinoma: 'Sentinel signs' versus extravasation

International Nuclear Information System (INIS)

Yun, Seong Jong; Nam, Deok Ho

2014-01-01

This study retrospectively compared the accuracy of angiographic sentinel signs (sentinel vessels, hypovascular areas, and delayed dots) with extravasation in the diagnosis of ruptured hepatocellular carcinoma (HCC). Sixteen patients diagnosed with HCC between March 2007 and November 2011 were evaluated. Among the patients, we identified 32 HCCs (19 ruptured, 13 unruptured), and assessed all HCCs by hepatic angiography with regard to extravasation, sentinel vessels, hypovascular areas, and delayed dots. We compared the sensitivity and specificity of the sentinel signs with those of the extravasation for the diagnosis of a ruptured HCC. For the angiographic diagnosis of a ruptured HCC, the sensitivity of the sentinel signs (sentinel vessel, 63.2%; hypovascular area, 89.5%; delayed dot, 72.7%) was higher than the sensitivity of extravasation (15.8%). The difference in sensitivity between each sentinel sign and extravasation was statistically significant (sentinel vessel, p = 0.012; hypovascular area, p < 0.001; delayed dot, p 0.039). The specificity of sentinel signs for the diagnosis of ruptured HCC was not statistically different from the specificity of extravasation. Sentinel signs are more accurate than extravasation for the angiographic diagnosis of a ruptured HCC.

Serum high sensitivity C-reactive protein levels and the severity of coronary atherosclerosis assessed by angiographic gensini score

International Nuclear Information System (INIS)

Masood, A.; Jafar, S.S.; Akram, Z.

2011-01-01

Objective: To assess the relationship between plasma high sensitivity C-reactive protein levels with severity of coronary atherosclerosis. Materials and Methods: The study included 80 patients subjected to coronary angiography. The extent of Coronary Artery Disease (CAD) was assessed using Gensini score. Patients were divided into three risk groups according to hs-CRP levels ( 3mg/L- as high risk). Mean Angiographic Gensini scores were compared among the risk groups. Correlation between serum hs-CRP levels and angiographic Gensini scores was also assessed. Results: The 26 (32.5%) patients belonging to hs-CRP low-risk group had a mean angiographic Gensini score of 11.8 +- 5.8, 18 (22.5%) belonging to moderate-risk group had a mean score of 28.9 +- 7.9 and 36 (45%) belonging to high- risk group had a mean score of 78.7 +- 41.0. By applying ANOVA the mean angiographic Gensini scores showed increasing trend from lower to higher hs-CRP risk groups (p < 0.001). Serum hs-CRP levels showed significant correlation with respective angiographic Gensini scores by Pearson's correlation (p < 0.001). Conclusion: Serum hs-CRP levels show significant correlation with the severity of Coronary Artery Disease as assessed by angiographic Gensini score. (author)

Clinical and angiographic predictors of haemodynamically significant angiographic lesions: development and validation of a risk score to predict positive fractional flow reserve.

Science.gov (United States)

Sareen, Nishtha; Baber, Usman; Kezbor, Safwan; Sayseng, Sonny; Aquino, Melissa; Mehran, Roxana; Sweeny, Joseph; Barman, Nitin; Kini, Annapoorna; Sharma, Samin K

2017-04-07

Coronary revascularisation based upon physiological evaluation of lesions improves clinical outcomes. Angiographic or visual stenosis assessment alone is insufficient in predicting haemodynamic stenosis severity by fractional flow reserve (FFR) and therefore cannot be used to guide revascularisation, particularly in the lesion subset system formulated. Of 1,023 consecutive lesions (883 patients), 314 (31%) were haemodynamically significant. Characteristics associated with FFR ≤0.8 include male gender, higher SYNTAX score, lesions ≥20 mm, stenosis >50%, bifurcation, calcification, absence of tortuosity and smaller reference diameter. A user-friendly integer score was developed with the five variables demonstrating the strongest association. On prospective validation (in 279 distinct lesions), the increasing value of the score correlated well with increasing haemodynamic significance (C-statistic 0.85). We identified several clinical and angiographic characteristics and formulated a scoring system to guide the approach to intermediate lesions. This may translate into cost savings. Larger studies with prospective validation are required to confirm our results.

Angiographic features of 26 children with Takayasu's arteritis

International Nuclear Information System (INIS)

McCulloch, M.; Goddard, E.; Sinclair, P.; Andronikou, S.; Mandelstam, S.; Beningfield, S.J.; Lawrenson, J.; Millar, A.J.W.

2003-01-01

Background: Takayasu's arteritis (TA) is a chronic idiopathic inflammatory disease affecting primarily the aorta, its proximal branches and the pulmonary arteries Objectives: To retrospectively review the angiograms of children with TA so as to describe the patterns of vascular involvement. Patients and methods: Twenty-six children with TA who differed from most other studies in that almost all of them presented with hypertension, reflecting the incidence of abdominal aortic and renal artery involvement. Results: The most consistent finding was stenosis of the aorta. Marginal irregularity/undulation of the aorta was also a useful angiographic diagnostic feature in subtle disease. The incidence of aneurysms was high compared to other studies and both fusiform and saccular aneurysms were encountered. Percutaneous transluminal angioplasty (PTA) was successful in all eight patients in whom it was performed. MRI, CT angiography and US are discussed as less invasive imaging alternatives. TA is a significant cause of renovascular hypertension in children in South Africa where there is a high incidence of tuberculous infection. Knowledge of the angiographic features and pattern of aortic involvement is essential for diagnosis and initiation of early and appropriate treatment, including PTA. (orig.)

Angiographic Validation of the American College of Cardiology Foundation–The Society of Thoracic Surgeons Collaboration on the Comparative Effectiveness of Revascularization Strategies Study

Science.gov (United States)

Chakrabarti, Anjan K.; Grau-Sepulveda, Maria V.; O’Brien, Sean; Abueg, Cassandra; Ponirakis, Angelo; Delong, Elizabeth; Peterson, Eric; Klein, Lloyd W.; Garratt, Kirk N.; Weintraub, William S.; Gibson, C. Michael

2017-01-01

Background The goal of this study was to compare angiographic interpretation of coronary arteriograms by sites in community practice versus those made by a centralized angiographic core laboratory. Methods and Results The study population consisted of 2013 American College of Cardiology–National Cardiovascular Data Registry (ACC–NCDR) records with 2- and 3- vessel coronary disease from 54 sites in 2004 to 2007. The primary analysis compared Registry (NCDR)-defined 2- and 3-vessel disease versus those from an angiographic core laboratory analysis. Vessel-level kappa coefficients suggested moderate agreement between NCDR and core laboratory analysis, ranging from kappa=0.39 (95% confidence intervals, 0.32–0.45) for the left anterior descending artery to kappa=0.59 (95% confidence intervals, 0.55–0.64) for the right coronary artery. Overall, 6.3% (n=127 out of 2013) of those patients identified with multivessel disease at NCDR sites had had 0- or 1-vessel disease by core laboratory reading. There was no directional bias with regard to overcall, that is, 12.3% of cases read as 3-vessel disease by the sites were read as <3-vessel disease by the core laboratory, and 13.9% of core laboratory 3-vessel cases were read as <3-vessel by the sites. For a subset of patients with left main coronary disease, registry overcall was not linked to increased rates of mortality or myocardial infarction. Conclusions There was only modest agreement between angiographic readings in clinical practice and those from an independent core laboratory. Further study will be needed because the implications for patient management are uncertain. PMID:24496239

Variations of Patient Doses in Interventional Examinations at Different Angiographic Units

International Nuclear Information System (INIS)

Bor, Dogan; Toklu, Tuerkay; Olgar, Turan; Sancak, Tanzer; Cekirge, Saruhan; Onal, Baran; Bilgic, Sadik

2006-01-01

Purpose. We analyzed doses for various angiographic procedures using different X-ray systems in order to assess dose variations. Methods. Dose-area product (DAP), skin doses from thermoluminescent dosimeters and air kerma measurements of 308 patients (239 diagnostic and 69 interventional) were assessed for five different angiographic units. All fluoroscopic and radiographic exposure parameters were recorded online for single and multiprojection studies. Radiation outputs of each X-ray system were also measured for all the modes of exposure using standard protocols for such measurements. Results. In general, the complexity of the angiographic procedure was found to be the most important reason for high radiation doses. Skill of the radiologist, management of the exposure parameters and calibration of the system are the other factors to be considered. Lateral cerebral interventional studies carry the highest risk for deterministic effects on the lens of the eye. Effective doses were calculated from DAP measurements and maximum fatal cancer risk factors were found for carotid studies. Conclusions. Interventional radiologists should measure patient doses for their examinations. If there is a lack of necessary instrumentation for this purpose, then published dose reports should be used in order to predict the dose levels from some of the exposure parameters. Patient dose information should include not only the measured quantity but also the measured radiation output of the X-ray unit and exposure parameters used during radiographic and fluoroscopic exposures

Angiographic analysis of animal model aneurysms treated with novel polyurethane asymmetric vascular stent (P-AVS): feasibility study.

Science.gov (United States)

Ionita, Ciprian N; Dohatcu, Andreea; Sinelnikov, Andrey; Sherman, Jason; Keleshis, Christos; Paciorek, Ann M; Hoffmann, K R; Bednarek, D R; Rudin, S

2009-01-01

Image-guided endovascular intervention (EIGI), using new flow modifying endovascular devices for intracranial aneurysm treatment is an active area of stroke research. The new polyurethane-asymmetric vascular stent (P-AVS), a vascular stent partially covered with a polyurethane-based patch, is used to cover the aneurysm neck, thus occluding flow into the aneurysm. This study involves angiographic imaging of partially covered aneurysm orifices. This particular situation could occur when the vascular geometry does not allow full aneurysm coverage. Four standard in-vivo rabbit-model aneurysms were investigated; two had stent patches placed over the distal region of the aneurysm orifice while the other two had stent patches placed over the proximal region of the aneurysm orifice. Angiographic analysis was used to evaluate aneurysm blood flow before and immediately after stenting and at four-week follow-up. The treatment results were also evaluated using histology on the aneurysm dome and electron microscopy on the aneurysm neck. Post-stenting angiographic flow analysis revealed aneurysmal flow reduction in all cases with faster flow in the distally-covered case and very slow flow and prolonged pooling for proximal-coverage. At follow-up, proximally-covered aneurysms showed full dome occlusion. The electron microscopy showed a remnant neck in both distally-placed stent cases but complete coverage in the proximally-placed stent cases. Thus, direct flow (impingement jet) removal from the aneurysm dome, as indicated by angiograms in the proximally-covered case, was sufficient to cause full aneurysm healing in four weeks; however, aneurysm healing was not complete for the distally-covered case. These results support further investigations into the treatment of aneurysms by flow-modification using partial aneurysm-orifice coverage.

Spontaneous regression of cerebral arteriovenous malformations: clinical and angiographic analysis with review of the literature

International Nuclear Information System (INIS)

Lee, S.K.; Vilela, P.; Willinsky, R.; TerBrugge, K.G.

2002-01-01

Spontaneous regression of cerebral arteriovenous malformation (AVM) is rare and poorly understood. We reviewed the clinical and angiographic findings in patients who had spontaneous regression of cerebral AVMs to determine whether common features were present. The clinical and angiographic findings of four cases from our series and 29 cases from the literature were retrospectively reviewed. The clinical and angiographic features analyzed were: age at diagnosis, initial presentation, venous drainage pattern, number of draining veins, location of the AVM, number of arterial feeders, clinical events during the interval period to thrombosis, and interval period to spontaneous thrombosis. Common clinical and angiographic features of spontaneous regression of cerebral AVMs are: intracranial hemorrhage as an initial presentation, small AVMs, and a single draining vein. Spontaneous regression of cerebral AVMs can not be predicted by clinical or angiographic features, therefore it should not be considered as an option in cerebral AVM management, despite its proven occurrence. (orig.)

Angiographic picture of soft tissue desmoid fibromas

International Nuclear Information System (INIS)

Nikitaev, N.S.; Kuznetsova, M.A.

1987-01-01

Arteriography was performed in 35 patients with soft tissue desmoid fibromas. Angiographic semiotics of this disease was described. The frequency of detectability of symptoms in the arterial, parenchymatous and venous phases was analyzed. A tumor in the arterial phase was shown to be of normevascular or moderately hypervascular type without noticeable winding of the nutrient arteries, such features of malignancy as lacunae and ''tumor'' vessels being absent. In the parenchymatous phase desmoid tumors were shown to accumulate moderately a contrast substance, a tumor contour at a vast length was ill defined and poorly marked from surrounding tissues. The venous phase was less noticeable and the time of its appearance was usually within normal. In general by most of its parameters the angiographic picture of agressive fibromatosis corresponded to that of benign tumors and could be used for differential diagnosis of desmoid fibromas and some types of tissue sarcomas

Adult Moyamoya disease angiographic images evolutive characters and treatment methods

International Nuclear Information System (INIS)

Qian Jiangnan; Ling Feng

2000-01-01

Objective: To discuss the angiographic images with evolutional characters and the treatment methods of the Moyamoya disease. Methods: The clinical manifestations, the radiographic changes and the comparative analysis between medicine treatment and surgery treatment, together with the laboratory tests findings were analyzed in one cases adult Moyamoya disease during six years. Conclusions: The angiographic characteristics of MMD show the supplied artery trunk stenosis, and followed by occlusion, with later appearance of vascular smoking sign. Medical treatment proved to be of null. Direct or indirect intra or extra cranial vascular anastomosis are effective for treatment

Angiographic characteristics of premature coronary artery disease in pakistan population; a prospective cross-sectional study

International Nuclear Information System (INIS)

Mustafa, B.; Rahman, H.U.

2015-01-01

Objective: To study the angiographic characteristics of premature coronary artery disease in our population. Methodology: From April 2014 to March 2015, coronary angiograms of 102 patients less than 40 years of age with a definitive diagnosis of ischemic heart disease were studied. Traditional risk factors of atherosclerosis were documented. Mode of presentation and symptoms were recorded along with angiographic findings of coronary artery disease severity, degree of coronary involvement, culprit vessel, lesion morphology, coronary dominance, coronary ectasia and left ventricular systolic function. Results: Mean age was 36.4 ± 4.1 years and 91% were male. Overall, left ventricular systolic function were fairly preserved (82%). 52% patients had single vessel CAD, 25% had double vessel while 19% had triple vessel coronary artery disease. Four patients had no luminal stenosis on coronary angiogram. LAD was the culprit vessel in 58.8%, RCA in 24.5% and left circumflex artery in 16.7% cases. More than 82% culprit lesions were severe or critical. 58% lesions were morphologically complex B2/C type while only 42% lesions were type A/B1. Coronary ectasia was seen in nearly 25% cases and all had ACS presentation. Right dominance was more common than left (57.8% vs 37.3%) while only 4.9% cases had dual posterior septal supply. Conclusion: Premature CAD in our population is acutely symptomatic, severe, complex (B2/C), single vessel disease. (author)

Comparison of intravascular ultrasound and angiographic assessement of coronary reference segment size in patients with type 2 diabetes mellitus

DEFF Research Database (Denmark)

Jensen, Lisette Okkels; Thayssen, Per; Mintz, Gary S

2008-01-01

During percutaneous coronary intervention, the reference segment is assessed angiographically. This report described the discrepancy between angiographic and intravascular ultrasound (IVUS) assessment of reference segment size in patients with type 2 diabetes mellitus. Preintervention IVUS was used...... to study 62 de novo lesions in 41 patients with type 2 diabetes mellitus. The lesion site was the image slice with the smallest lumen cross-sectional area (CSA). The proximal and distal reference segments were the most normal-looking segments within 5 mm proximal and distal to the lesion. Plaque burden...... was measured as plaque CSA/external elastic membrane (EEM) CSA. Using IVUS, the reference lumen diameter was 2.80 +/- 0.42 mm and the reference EEM diameter was 4.17 +/- 0.56 mm. The angiographic reference diameter was 2.63 +/- 0.36 mm. Mean difference between the IVUS EEM diameter and angiographic reference...

Essentials of diagnostic and interventional angiographic technique

International Nuclear Information System (INIS)

Gerlock, A.J.; Mirfakhraee, M.

1985-01-01

This volume presents coverage of basic angiographic techniques and shows how to get to the point of taking the angiogram, and tells how to avoid pitfalls. Particularly valuable is the information on how to get out of trouble if an error is made while manipulating the catheter

Development of DIGITEXαPlus digital angiographic system

International Nuclear Information System (INIS)

Imanishi, Tetsuo; Miura, Yusuke; Sasaki, Osamu; Furuyama, Makoto; Yasumi, Masayuki

2001-01-01

The functions required of digital angiographic (DA) systems have been noticeably changing with the recent popularization of the technique of interventional radiology (IVR) in the field of angiography. We have developed a new digital angiographic system, named the DIGITEXαPlus, which is designed to meet the requirements of the latest IVR technologies. The DIGITEXαPlus system is equipped with a high-performance one-million-pixel CCD camera, a newly developed F.P.O. (fluoro-power optimizer), and a contrast-priority radiography control system, which combine together to provide high quality of images both in fluoroscopy and in fluorography. In this new system, a low-dose pulsed fluoroscopy method, employed as standard, minimizes the X-ray doses to patients, and an image controller (IVR MASTER) of a joy stick type provides more diversified functions that its predecessors. These two features enhance the reliability, and simplifies the operation, of the IVR system as a whole. (author)

Intractable Postpartum Bleeding: A Comparison of the Retrospective Analysis of Angiographic Findings and Transcatheter Arterial Embolization According to Delivery Pattern

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Ahn, Eun Jung; Kim, Young Hwan; Kim, Si Hyung; Choi, Jin Soo; Park, Jun Cheol; Kwon, Sang Hun; Jo, Chi Heum; Cha, Soon Do [Keimyung University College of Medicine, Daegu (Korea, Republic of)

2008-12-15

We evaluated the technical aspect and efficacy of transcatheter arterial embolization (TAE) in cases of intractable postpartum bleeding by comparing the angiographic findings women patients according to their delivery pattern. Between July of 2003 and March of 2008, 55 female patients were enrolled in this study. Of the 55 patients, 36 underwent a vaginal delivery (group 1), whereas 19 underwent a cesarean section delivery (group 2). We retrospectively evaluated the angiographic findings and the embolization technique between groups, using a Pearson Chi-Square test. Medical records and telephone interview findings were also reviewed to evaluate the efficacy of TAE and the outcome of fertility. Significantly greater positive angiographic findings were found in group 2 (63.2%) relative to group 1 (30.6%). For positive angiographic findings, except for AVM, the embolization was performed using coil or glue with gelfoam. For the negative angiographic findings or AVM, the gelfoam was the only embolic agent used. In all patients except for one, bleeding stopped after embolization. Major complications occurred in 2 patients only, and included uterine synechia and perforation. All patients except for one recovered after menstruation. In total, four patients became pregnant and one patient delivered a healthy infant. Positive angiographic findings requiring embolization with coil or glue, as well as gelfoam, were more commonly encountered in group 2 than in group 1. Based on the outcome of the study group, TAE is a safe and effective treatment for intractable postpartum bleeding and is also useful for preserving fertility.

Intractable Postpartum Bleeding: A Comparison of the Retrospective Analysis of Angiographic Findings and Transcatheter Arterial Embolization According to Delivery Pattern

International Nuclear Information System (INIS)

Ahn, Eun Jung; Kim, Young Hwan; Kim, Si Hyung; Choi, Jin Soo; Park, Jun Cheol; Kwon, Sang Hun; Jo, Chi Heum; Cha, Soon Do

2008-01-01

We evaluated the technical aspect and efficacy of transcatheter arterial embolization (TAE) in cases of intractable postpartum bleeding by comparing the angiographic findings women patients according to their delivery pattern. Between July of 2003 and March of 2008, 55 female patients were enrolled in this study. Of the 55 patients, 36 underwent a vaginal delivery (group 1), whereas 19 underwent a cesarean section delivery (group 2). We retrospectively evaluated the angiographic findings and the embolization technique between groups, using a Pearson Chi-Square test. Medical records and telephone interview findings were also reviewed to evaluate the efficacy of TAE and the outcome of fertility. Significantly greater positive angiographic findings were found in group 2 (63.2%) relative to group 1 (30.6%). For positive angiographic findings, except for AVM, the embolization was performed using coil or glue with gelfoam. For the negative angiographic findings or AVM, the gelfoam was the only embolic agent used. In all patients except for one, bleeding stopped after embolization. Major complications occurred in 2 patients only, and included uterine synechia and perforation. All patients except for one recovered after menstruation. In total, four patients became pregnant and one patient delivered a healthy infant. Positive angiographic findings requiring embolization with coil or glue, as well as gelfoam, were more commonly encountered in group 2 than in group 1. Based on the outcome of the study group, TAE is a safe and effective treatment for intractable postpartum bleeding and is also useful for preserving fertility

MR angiographic and parenchymal evaluation of cerebral infaraction in sickle cell anemia

International Nuclear Information System (INIS)

Masaryk, T.J.; Masaryk, A.M.; Ross, J.S.; Modic, M.T.; Wiznitzer, M.; Berman, B.

1989-01-01

Cerebral infarction is an important complication of sickle cell anemia, believed to be related to large-vessel stenoses/occlusion and/or capillary/venous sickling resulting in thrombosis. Identification of these complications (especially large-vessel arterial disease) is important in selecting patients for transfusion therapy. The purpose of this study was to determine the suitability of combined three-dimensional Fourier transform time-of-flight MR angiographic and parenchymal T2-weighted spin-echo examinations for evaluation of central nervous system (CNS) complications of sickle cell anemia. Seven patients (age range, 5-14 years) were evaluated. Five had documented strokes while two had symptoms resembling those of transient ischemic attack. The preliminary data indicate that combined MR angiographic and parenchymal studies are capable of identifying those patients with sickle cell anemia complicated by large-vessel CNS occlusive disease and cerebral infarction and can be used as a noninvasive guide to therapy

Transvenous embolization of cavernous sinus dural arteriovenous fistula via angiographic occlusive inferior petrous sinus

Directory of Open Access Journals (Sweden)

Chao-Bao Luo

2015-09-01

Conclusion: Angiographic occlusive IPS of CSDAVF may be related to true occlusion of IPS or patent IPS with compartment of the IPS-CS. There is no statistically significant difference in procedural times for these two different fistula anatomies. Transvenous embolization via angiographic occlusive IPS is a safe and effective method to manage CSDAVFs.

GDC 360 for the endovascular treatment of intracranial aneurysms: a matched-pair study analysing angiographic outcomes with GDC 3D coils in 38 patients

International Nuclear Information System (INIS)

Taschner, Christian A.; Thines, Laurent; Lejeune, Jean-Paul; El-Mahdy, Mohamed; Rachdi, Henda; Gauvrit, Jean-Yves; Pruvo, Jean-Pierre; Leclerc, Xavier

2009-01-01

The purpose of this study was to determine whether coil embolisation with a new complex-shaped Guglielmi Detachable Coil (GDC 360 ; Boston Scientific Neurovascular, Fremont, CA, USA) has any effect on the stability of aneurysm occlusion. Fifty-one consecutive patients with intracranial aneurysms treated with GDC 360 were included. Angiographic results and adverse neurological events during the follow-up period were recorded. For 38 patients treated with GDC 360 with available follow-up data, a corresponding patient treated with GDC 3D was identified from our database. Matches were sought for rupture status, location, aneurysmal size, and neck size. The angiographic outcome of these matched controls at 6 months was compared to aneurysms treated with GDC 360 . Initial angiographic controls for 38 patients treated with GDC 360 showed complete occlusion in 32 aneurysms, and a neck remnant in six. At 6-month follow-up, complete occlusion was found in 29, a neck remnant in eight, and a residual aneurysm in one. One patient treated with GDC 360 needed retreatment for a major recanalisation. In 38 matched patients treated with GDC 3D, initial angiographic controls found complete aneurysmal occlusion in 30 aneurysms and a residual neck in 8. At 6-month follow-up, 24 aneurysms were completely occluded, ten showed a neck remnant, and residual aneurysms were seen in four. Four patients, treated with GDC 3D, were retreated for major aneurysm recanalisations. Our data suggests that endovascular coil embolisation with GDC 360 might improve long-term stability of coiled aneurysms when compared to GDC 3D. (orig.)

Computer tomographic and angiographic studies of histologically confirmed intrahepatic masses

International Nuclear Information System (INIS)

Janson, R.; Lackner, K.; Paquet, K.J.; Thelen, M.; Thurn, P.

1980-01-01

The computer tomographic and angiographic findings in 53 patients with intrahepatic masses were compared. The histological findings show that 17 were due to echinococcus, 12 were due to hepatic carcinoma, ten were metastases, five patients had focal nodular hyperplasia, three an alveolar echinococcus and there were three cases with an haemangioma of the liver and a further three liver abscesses. Computer tomography proved superior in peripherally situated lesions, and in those in the left lobe of the liver. Arteriography was better at demonstrating lesions below 2 cm in size, particularly vascular tumours. As a pre-operative measure, angiography is to be preferred since it is able to demonstrate anatomic anomalies and variations in the blood supply, as well as invasion of the portal vein or of the inferior vena cava. (orig.) [de

Computer tomographic and angiographic studies of histologically confirmed intrahepatic masses

Energy Technology Data Exchange (ETDEWEB)

Janson, R.; Lackner, K.; Paquet, K.J.; Thelen, M.; Thurn, P.

1980-06-01

The computer tomographic and angiographic findings in 53 patients with intrahepatic masses were compared. The histological findings show that 17 were due to echinococcus, 12 were due to hepatic carcinoma, ten were metastases, five patients had focal nodular hyperplasia, three an alveolar echinococcus and there were three cases with an haemangioma of the liver and a further three liver abscesses. Computer tomography proved superior in peripherally situated lesions, and in those in the left lobe of the liver. Arteriography was better at demonstrating lesions below 2 cm in size, particularly vascular tumours. As a pre-operative measure, angiography is to be preferred since it is able to demonstrate anatomic anomalies and variations in the blood supply, as well as invasion of the portal vein or of the inferior vena cava.

Angiographic Evaluation of Carotid Artery Grafting with Prefabricated Small-Diameter, Small-Intestinal Submucosa Grafts in Sheep

International Nuclear Information System (INIS)

Pavcnik, Dusan; Obermiller, Josef; Uchida, Barry T.; Van Alstine, William; Edwards, James M.; Landry, Gregory J.; Kaufman, John A.; Keller, Frederick S.; Roesch, Josef

2009-01-01

The purpose of this study was to report the longitudinal angiographic evaluation of prefabricated lyophilized small-intestinal submucosa (SIS) grafts placed in ovine carotid arteries and to demonstrate a variety of complications that developed. A total of 24 grafts, 10 cm long and 6 mm in diameter, were placed surgically as interposition grafts. Graft patency at 1 week was evaluated by Doppler ultrasound, and angiography was used for follow-up at 1 month and at 3 to 4 months. A 90% patency rate was found at 1 week, 65% at 1 month, and 30% at 3 to 4 months. On the patent grafts, angiography demonstrated a variety of changes, such as anastomotic stenoses, graft diffuse dilations and dissections, and aneurysm formation. These findings have not been previously demonstrated angiographically by other investigators reporting results with small-diameter vessel grafts made from fresh small-intestinal submucosa (SIS). The complications found were partially related to the graft construction from four SIS layers. Detailed longitudinal angiographic study should become an essential part of any future evaluation of small-vessel SIS grafting.

The zero-wall puncture: a novel angiographic puncture technique with substantial benefits

International Nuclear Information System (INIS)

Leswick, D.A.; Szkup, P.; Stoneham, G.W.

2005-01-01

Medical education can be busy, exhausting, and stressful, with potential adverse effects on trainees' physical and mental health. Radiology residency is no exception. In addition to increased daily workload and study requirements, Canadian radiology residents are performing a diverse and increasing number of emergent diagnostic examinations after hours. In an attempt to improve resident self-worth and efficiency during angiographic rotations, we investigated the effects of a novel angiographic puncture procedure on various resident lifestyle indexes. Standard techniques for accessing the femoral artery are either the single-wall puncture or double-wall puncture (Seldinger technique). Both of these techniques are widely known and practiced. Following procedure completion, hemostasis must be achieved at the puncture site. This has traditionally required manual compression at the puncture site, which may require 15 to 20 minutes. At our institution the standard policy is that 'whoever makes the puncture, compresses the groin,' also known as 'you broke it, you fix it'. This has prompted our industrious resident complement to develop a novel, previously undescribed, angiographic puncture technique known as the 'zero-wall puncture technique.' Preliminary unpublished results from our institution show that when residents employ the zero-wall puncture technique the attending staff radiologist subsequently both performs the puncture and compresses the groin at the end of the procedure. We investigated the effect of zero-wall puncture on various resident lifestyle indexes. (author)

Risk factors and short-term outcome in patients with angiographically negative subarachnoid hemorrhage

DEFF Research Database (Denmark)

Dalbjerg, Sara Maria; Larsen, Carl Christian; Romner, Bertil

2013-01-01

The objective of this study was to identify prognostic factors for clinical outcome in patients with non-traumatic, angiographically negative subarachnoid hemorrhage. Furthermore, the aim was to investigate if patients on anticoagulant therapy may have a more unfavorable outcome than patients...

Prevalence, Risk Factors, and Outcome of Myocardial Infarction with Angiographically Normal and Near-Normal Coronary Arteries: A Systematic Review and Meta-Analysis

Directory of Open Access Journals (Sweden)

Samad Ghaffari

2016-12-01

Full Text Available Context: Coronary artery diseases are mostly detected using angiographic methods demonstrating arteries status. Nevertheless, Myocardial Infarction (MI may occur in the presence of angiographically normal coronary arteries. Therefore, this study aimed to investigate the prevalence of MI with normal angiography and its possible etiologies in a systematic review. Evidence Acquisition: In this meta-analysis, the required data were collected from PubMed, Science Direct, Google Scholar, Scopus, Magiran, Scientific Information Database, and Medlib databases using the following keywords: “coronary angiograph”, “normal coronary arteries”, “near-normal coronary arteries”, “heart diseases”, “coronary artery disease”, “coronary disease”, “cardiac troponin I”, “Myocardial infarction”, “risk factor”, “prevalence”, “outcome”, and their Persian equivalents. Then, Comprehensive Meta-Analysis software, version 2 using randomized model was employed to determine the prevalence of each complication and perform the meta-analysis. P values less than 0.05 were considered to be statistically significant. Results: Totally, 20 studies including 139957 patients were entered into the analysis. The patients’ mean age was 47.62 ± 6.63 years and 64.4% of the patients were male. The prevalence of MI with normal or near-normal coronary arteries was 3.5% (CI = 95%, min = 2.2%, and max = 5.7%. Additionally, smoking and family history of cardiovascular diseases were the most important risk factors. The results showed no significant difference between MIs with normal angiography and 1- or 2-vessel involvement regarding the frequency of major adverse cardiac events (5.4% vs. 7.3%, P = 0.32. However, a significant difference was found between the patients with normal angiography and those with 3-vessel involvement in this regard (5.4% vs. 20.2%, P < 0.001. Conclusions: Although angiographic studies are required to assess the underlying

Relationship between Angiographic Results and Morphology in Sidewall Intracranial Aneurysms after Stent-Assisted Coil Embolization.

Science.gov (United States)

Nii, Kouhei; Aikawa, Hiroshi; Tsutsumi, Masanori; Eto, Ayumu; Iko, Minoru; Sakamoto, Kimiya; Inoue, Ritsuro; Mitsutake, Takafumi; Hanada, Hayatsura; Kazekawa, Kiyoshi

2016-03-01

Stent-assisted coil embolization (SACE) is used to address wide-necked or complex aneurysms. However, as they may recanalize after SACE, predictors of recanalization are needed. We investigated the relationship between follow-up angiographic results and the morphology of sidewall (SW) aneurysms in patients treated by SACE. Between September 2010 and September 2014, we performed 80 SACE procedures for SW intracranial aneurysms. Angiographic findings, obtained immediately after the procedure, 3-6 months thereafter, and when aneurysmal recanalization was suspected on MR angiogram scan, were recorded. Morphologically, the SW aneurysms were classified as "outside" (OS) and "partially inside" (PI) based on the curve of the axes of the proximal or distal parent artery with respect to the aneurysmal neck. Follow-up angiographic studies on OS- and PI SW aneurysms were compared. On the initial angiograms, we classified 42 aneurysms as OS and 38 as PI. Immediately after SACE, there was no significant difference in the angiographic findings on OS and PI aneurysms. However, on follow-up angiograms, there was a significant difference in the rate of spontaneous improvement (4 of 42 [OS] versus 21 of 38 [PI], P = .001). We performed additional coil embolization to treat 3 recanalized OS aneurysms. SW aneurysms classified morphologically as PI tended to occlude progressively even after incomplete occlusion by SACE. In contrast, aneurysms classified as OS must be observed carefully after SACE. Copyright © 2016 National Stroke Association. Published by Elsevier Inc. All rights reserved.

Usefulness of angiographic embolization endoscopic metallic clip placement in patient with non-variceal upper gastrointestinal bleeding

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Yoon, Min Jae; Hwang, Cheol Mog; Kim, Ho Jun; Cho, Young Jun; Bae, Seok Hwan [Dept. of Radiology, Konyang University Hospital, Daejeon (Korea, Republic of); Shin, Byung Seok; Ohm, Joon Young [Dept. of Radiology, Chungnam National University College of Medicine, Daejeon (Korea, Republic of); Kang, Chae Hoon [Dept. of Radiology, Inje University College of Medicine, Pusan Paik Hospital, Busan (Korea, Republic of)

2013-08-15

The aim of this study is to assess the usefulness of angiographic embolization after endoscopic metallic clip placement around the edge of non-variceal upper gastrointestinal bleeding ulcers. We have chosen 41 patients (mean age, 65.2 years) with acute bleeding ulcers (22 gastric ulcers, 16 duodenal ulcers, 3 malignant ulcers) between January 2010 and December 2012. We inserted metallic clips during the routine endoscopic treatments of the bleeding ulcers. Subsequent transcatheter arterial embolization was performed within 2 hours. We analyzed the angiographic positive rates, angiographic success rates and clinical success rates. Among the 41 patients during the angiography, 19 patients (46%) demonstrated active bleeding points. Both groups underwent embolization using microcoils, N-butyl-cyano-acrylate (NBCA), microcoils with NBCA or gelfoam particle. There are no statistically significant differences between these two groups according to which embolic materials are being used. The bleeding was initially stopped in all patients, except the two who experienced technical failures. Seven patients experienced repeated episodes of bleeding within two weeks. Among them, 4 patients were successful re-embolized. Another 3 patients underwent gastrectomy. Overall, clinical success was achieved in 36 of 41 (87.8%) patients. The endoscopic metallic clip placement was helpful to locate the correct target vessels for the angiographic embolization. In conclusion, this technique reduced re-bleeding rates, especially in patients who do not show active bleeding points.

Usefulness of angiographic embolization endoscopic metallic clip placement in patient with non-variceal upper gastrointestinal bleeding

International Nuclear Information System (INIS)

Yoon, Min Jae; Hwang, Cheol Mog; Kim, Ho Jun; Cho, Young Jun; Bae, Seok Hwan; Shin, Byung Seok; Ohm, Joon Young; Kang, Chae Hoon

2013-01-01

The aim of this study is to assess the usefulness of angiographic embolization after endoscopic metallic clip placement around the edge of non-variceal upper gastrointestinal bleeding ulcers. We have chosen 41 patients (mean age, 65.2 years) with acute bleeding ulcers (22 gastric ulcers, 16 duodenal ulcers, 3 malignant ulcers) between January 2010 and December 2012. We inserted metallic clips during the routine endoscopic treatments of the bleeding ulcers. Subsequent transcatheter arterial embolization was performed within 2 hours. We analyzed the angiographic positive rates, angiographic success rates and clinical success rates. Among the 41 patients during the angiography, 19 patients (46%) demonstrated active bleeding points. Both groups underwent embolization using microcoils, N-butyl-cyano-acrylate (NBCA), microcoils with NBCA or gelfoam particle. There are no statistically significant differences between these two groups according to which embolic materials are being used. The bleeding was initially stopped in all patients, except the two who experienced technical failures. Seven patients experienced repeated episodes of bleeding within two weeks. Among them, 4 patients were successful re-embolized. Another 3 patients underwent gastrectomy. Overall, clinical success was achieved in 36 of 41 (87.8%) patients. The endoscopic metallic clip placement was helpful to locate the correct target vessels for the angiographic embolization. In conclusion, this technique reduced re-bleeding rates, especially in patients who do not show active bleeding points.

A study of low-density areas, clinical findings, and angiographic findings in patients with cerebral infarction

International Nuclear Information System (INIS)

Saiki, Iwao; Sakai, Yoshiaki; Oikawa, Tadato; Koide, Kohji; Kanaya, Haruyuki.

1978-01-01

55 out of 62 patients with cerebral infarction were investigated in terms of CT scan findings, angiographic findings, and clinical symptoms. The results obtained were as follows: 1) The low-density areas of the CT scan findings were classified into the following four types: large hemispheric or lobular --Type I; wedge-shaped --Type II; small --Type III; and lacunar low-density area. --Type IV. 2) Almost all patients with angiographically occlusive findings showed low-density areas of Type I; however, one patient with ICA occlusion revealed only a lacunar low-density area. 3) The patients with lacunar low-density areas showed an angiographically delayed filling of the angular artery and posterior parietal artery of the middle cerebral artery. 4) The relationship between the types of low-density areas and the clinical conscious disorders was not clear. On the other hand, the patients with Type I low-density areas almost all had motor disturbances, while patients with other types of low-density areas showed only 60 - 70% motor disturbances. 5) In patients with speech disorders, total aphasia cases were found in patients with large hemispheric low-density areas on the left side. Although, motor aphasia cases were seen in patients with various low-density areas on the left inferior frontal and precentral gyri, dysarthria cases were found in the patients with several low-density areas on both sides. 6) The localization of lacunar low-density areas seemed to be near the caudate nucleus on the right side and in the putaminal regions on the left side. The mean and the standard deviation of CT numbers in the lacunar low-density areas showed higher values on the right side than on the left side. (author)

Multi-detector CT coronary angiographic findings of coronary-to-pulmonary artery fistula

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Bae, Jae Seok; Park, Eun Ah; Lim, Ji Yeon; Lee, Whal [Dept. of Radiology, Seoul National University Hospital, Seoul (Korea, Republic of); Park, Jae Hyung [Dept. of Radiology, Myongji Hospital, Seonam University College of Medicine, Goyang (Korea, Republic of)

2017-01-15

To evaluate multi-detector CT (MDCT) coronary angiographic findings of coronary-to-pulmonary artery fistula (CPAF). We retrospectively reviewed images of patients with CPAF from the coronary CT angiography (CCTA) database obtained with a 64-channel MDCT between January 2008 and March 2011. We analyzed the CCTA findings for feeding arteries, fistula, association with peripulmonary arterial aneurysms, and the presence of communication between the CPAF and bronchial arteries. Fifty-five of the 15042 (0.37%) patients were diagnosed with CPAFs. The feeding artery was single (n = 18) or multiple (n = 37). The fistula had a single drainage site (n = 54) or multiple drainage sites (n = 1). The mean diameter of the fistulous opening was 2.7 ± 1.4 mm. A peripulmonary arterial aneurysm was present in 24 (44%) patients. Communication between CPAF and bronchial arteries was present in eight (14.5%) patients. MDCT coronary angiography can provide comprehensive morphologic details on CPAF and may help in presurgical or preinterventional planning.

Transarterial embolization in the management of intractable epistaxis: the angiographic findings and results based on etiologies.

Science.gov (United States)

Wang, Bin; Zu, Qing-Quan; Liu, Xing-Long; Zhou, Chun-Gao; Xia, Jin-Guo; Zhao, Lin-Bo; Shi, Hai-Bin; Liu, Sheng

2016-08-01

Transarterial embolization (TAE) appears to be a safe and effective treatment for patients with intractable epistaxis, despite different etiologies or angiography findings. Idiopathic epistaxis is prone to present with negative angiographic findings. To retrospectively evaluate the safety and effectiveness of TAE for intractable epistaxis, and focus on the factors of etiology and angiographic findings. From March 2008 to December 2014, the data of 43 patients with intractable bleeding undergoing TAE were reviewed. The outcomes of interventional therapy were assessed according to different etiology (malignant or benign disease) and angiographic finding (positive or negative angiogram). Positive angiographic findings were found in 11 of 12 cases with malignant diseases and 22 of 31 cases with benign diseases, respectively (p = 0.237). Among the 10 cases with negative angiographic findings, the negative angiography rate of idiopathic epistaxis was higher than that of epistaxis with definite etiology (p = 0.003). Bleeding was controlled successfully in all of the 43 patients after embolization. During the mean follow-up period of 24.0 ± 16.7 months, five patients relapsed. No significant difference was found in recurrence rates between malignant and benign diseases or between positive and negative angiography (p = 0.241, p = 0.704, respectively).

Clinical-pathological-angiographic correlations following transluminal atherectomy

International Nuclear Information System (INIS)

Althaus, S.J.; Maynar, M.; Reyes, R.; Pulido-Duque, J.M.; Casal, G.; Hunter, D.W.; Castaneda-Zuniga, W.R.; Amplatz, K.

1989-01-01

Following percutaneous atherectomy, arterial and catheter diameter relationships were correlated with angiographic and ankle-arm index results. There was a greater amount of tissue removed, improved luminal reconstitution, and ankle-arm index in lesions where the catheter and arterial diameters were equal or within 0.5 mm. Excluding lesions requiring angioplasty, 77% of our lesions had less than 30% residual stenosis; including lesions requiring concomitant angioplasty, the initial overall patency was 93%, with a 1-year patency rate of 92.5%. This study indicates that adequate matching of the atherectomy catheter diameter to the arterial diameter is necessary to optimize tissue removal and clinical results

Cerebral angiographic changes on serial examination of a patient with migraine

Energy Technology Data Exchange (ETDEWEB)

Masuzawa, T.; Shinoda, S.; Nakahara, N.; Abe, F.; Sato, F.; Furuse, M.

1983-03-01

Curious cerebral angiographic changes are described in a 27-year-old female migraine patient. During the period of observation of this patient, both the intracranial carotid artery and the vertebrobasilar artery systems presented unusual and fascinating cerebral arteriographic pictures. In an attack of migraine, angiography showed that all the intracranial secondary and tertiary branches of the carotid arterial system were dilated without showing any changes in the extracranial arteries and when the migraine attack had subsided, all branches of the carotid arteries as well as the vertebrobasilar arteries demonstreated abnormal segmental narrowings or vasospasm. These sequential angiographic changes have not been hitherto reported in migraine.

Renal artery origins: best angiographic projection angles.

Science.gov (United States)

Verschuyl, E J; Kaatee, R; Beek, F J; Patel, N H; Fontaine, A B; Daly, C P; Coldwell, D M; Bush, W H; Mali, W P

1997-10-01

To determine the best projection angles for imaging the renal artery origins in profile. A mathematical model of the anatomy at the renal artery origins in the transverse plane was used to analyze the amount of aortic lumen that projects over the renal artery origins at various projection angles. Computed tomographic (CT) angiographic data about the location of 400 renal artery origins in 200 patients were statistically analyzed. In patients with an abdominal aortic diameter no larger than 3.0 cm, approximately 0.5 mm of the proximal part of the renal artery and origin may be hidden from view if there is a projection error of +/-10 degrees from the ideal image. A combination of anteroposterior and 20 degrees and 40 degrees left anterior oblique projections resulted in a 92% yield of images that adequately profiled the renal artery origins. Right anterior oblique projections resulted in the least useful images. An error in projection angle of +/-10 degrees is acceptable for angiographic imaging of the renal artery origins. Patients sex, site of interest (left or right artery), and local diameter of the abdominal aorta are important factors to consider.

Angiographically borderline left main coronary artery lesions: correlation of transthoracic doppler echocardiography and intravascular ultrasound: a pilot study

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Varga Albert

2011-06-01

Full Text Available Abstract Background the clinical decision making could be difficult in patients with borderline lesions (visually assessed stenosis severity of 30 to 50% of the left main coronary artery (LM. The aim of the study was to evaluate the relationship between transthoracic Doppler (TTDE peak diastolic flow velocity (PDV and intravascular ultrasound (IVUS measurements in the assessment of angiographically borderline LM lesions. Methods 27 patients (mean age 64 ± 8 years, 21 males with borderline LM stenosis referred for IVUS examination were included in the study. We performed standard IVUS with minimal lumen area (MLA and plaque burden (PB measurement and routine quantitative coronary angiography (QCA with diameter stenosis (%DS and area stenosis (%AS assessment in all. During TTDE, resting PDV was measured in the LM. Results interpretable Doppler signal could be obtained in 24 patients (88% feasibility; therefore these patients entered the final analysis. MLA was 7.1 ± 2.7 mm2. TTDE measured PDV correlated significantly with IVUS-derived MLA (r = -0.46, p 2 LM stenosis. Conclusion In angiographically borderline LM disease, resting PDV from transthoracic echocardiography is increased in presence of increased plaque burden by IVUS. TTDE evaluation might be a useful adjunct to other invasive and non-invasive methods in the assessment of borderline LM lesions. Further, large scale studies are needed to establish the exact cut-off value of PDV for routine clinical application.

Economic evaluation of angiographic interventions including a whole-radiology in- and outpatient care

International Nuclear Information System (INIS)

Nolte-Ernsting, C.; Abel, K.; Krupski, G.; Lorenzen, J.; Adam, G.

2006-01-01

Purpose: To determine the economic efficiency of a whole-radiology in- and outpatient treatment with angiographic interventions performed as the main or sole therapy. Materials and Methods: The calculations represent the data of a university radiology department, including the following angiographic interventions (neuroradiology not considered): Vascular intervention (PTA, stent implantation) of kidneys and extremities, recanalization of hemodialysis access, chemoembolization, diagnostic arterioportal liver CT, port implantation, varicocele embolization, PTCD, percutaneous implantation of biliary stent. First, the different angiographic interventions are categorized with reference to the German DRG system 2005. Considering the example of a university hospital, the individual cost of each intervention is calculated and correlated with reimbursements by G-DRG2005 and so-called ''ambulant operation'' (EBM200plus). With these data, profits and losses are calculated for both in- and outpatient care. Results: Radiologic interventions of inpatients yield a profit in the majority of cases. With a base rate of 2900 Euro, the profits in our university hospital range between -872 Euro and +3411 Euro (mean: +1348 Euro). On the other hand, those angiographic interventions suitable for ''ambulant operation'' generate average profits of +372 Euro, if only direct costs are considered. The data of outpatient radiological interventions average between 381 Euro up to 1612 Euro lower than compared with profits obtained from in patient care. (orig.)

Clinical results of stereotactic heavy-charged-particle radiosurgery for intracranial angiographically occult vascular malformations

International Nuclear Information System (INIS)

Levy, R.P.; Fabrikant, J.I.; Phillips, M.H.; Frankel, K.A.; Steinberg, G.K.; Marks, M.P.; DeLaPaz, R.L.; Chuang, F.Y.S.; Lyman, J.T.

1989-12-01

Angiographically occult vascular malformations (AOVMs) of the brain have been recognized for many years to cause neurologic morbidity and mortality. They generally become symptomatic due to intracranial hemorrhage, focal mass effect, seizures or headaches. The true incidence of AOVMs is unknown, but autopsy studies suggest that they are more common than high-flow angiographically demonstrable arteriovenous malformations (AVMs). We have developed stereotactic heavy-charged-particle Bragg peak radiosurgery for the treatment of inoperable intracranial vascular malformations, using the helium ion beams at the Lawrence Berkeley Laboratory 184-inch Synchrocyclotron and Bevatron. This report describes the protocol for patient selection, radiosurgical treatment planning method, clinical and neuroradiologic results and complications encountered, and discusses the strengths and limitations of the method. 10 refs., 1 fig

Clinical results of stereotactic heavy-charged-particle radiosurgery for intracranial angiographically occult vascular malformations

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Levy, R.P.; Fabrikant, J.I.; Phillips, M.H.; Frankel, K.A.; Steinberg, G.K.; Marks, M.P.; DeLaPaz, R.L.; Chuang, F.Y.S.; Lyman, J.T.

1989-12-01

Angiographically occult vascular malformations (AOVMs) of the brain have been recognized for many years to cause neurologic morbidity and mortality. They generally become symptomatic due to intracranial hemorrhage, focal mass effect, seizures or headaches. The true incidence of AOVMs is unknown, but autopsy studies suggest that they are more common than high-flow angiographically demonstrable arteriovenous malformations (AVMs). We have developed stereotactic heavy-charged-particle Bragg peak radiosurgery for the treatment of inoperable intracranial vascular malformations, using the helium ion beams at the Lawrence Berkeley Laboratory 184-inch Synchrocyclotron and Bevatron. This report describes the protocol for patient selection, radiosurgical treatment planning method, clinical and neuroradiologic results and complications encountered, and discusses the strengths and limitations of the method. 10 refs., 1 fig.

Optimal use of directional coronary atherectomy is required to ensure long-term angiographic benefit: a study with matched procedural outcome after atherectomy and angioplasty

NARCIS (Netherlands)

V.A.W.M. Umans (Victor); D.T.J. Keane (David); R. Melkert (Rein); P.W.J.C. Serruys (Patrick); D.P. Foley (David); H. Boersma (Eric)

1994-01-01

textabstractOBJECTIVES. This study was designed to examine whether restenosis is related to the extent or mechanism of lumen improvement and to explore angiographic determinants of optimal atherectomy. BACKGROUND. Directional atherectomy induces a greater extent of immediate gain and late loss but

Coronary arterial Disease associated with arteriosclerosis in lower extremity: Angiographic analysis

International Nuclear Information System (INIS)

Kim, Ji Hye; Chung, Jin Wook; Lee, Seon Kyu; Han, Joon Koo; Park, Jae Hyung; Kim, Jae Seung; Han, Man Chung

1993-01-01

We performed both peripheral and coronary angiographies in 52 patients with an arteriosclerosis in lower extremities. The severity of arteriosclerotic narrowing of the coronary and peripheral arteries were compared on angiographies. An angiographic vascular score(AVS, 0-5) reflecting the number and the degree of stenosis in 12 lower extremity arteries and three major coronary arteries was assigned to each angiogram and the sun of scores in the lower extremity arteries was compared with the incidence of significant coronary artery disease (more than grade 3) and coronary score. Relation of incidence and severity of vascular stenosis and risk factors (diabetes metallitus, hypertension, smoking, and hypercholesterolemia) was also analyzed. Thirty-four of 52 patients (65%) had an angiographically significant coronary artery disease. Thirteen of these 34 patients (38%) had no clinical symptom and sign of the ischemic heart disease. There was no statistically significant difference in the incidence and severity of coronary artery disease between high (more than 30) and low AVS group in lower extremity (p>0.14). All patients had at least one risk factor and 49 of 52 patients (94%) had multiple risk factors. Coronary angiography was normal in there patients with only one risk factors, and angiographically significant coronary artery disease existed in nine of 16 cases (56.3%) with two risk factors. 13 of 17 case (76.5%) with three risk factors, and 12 of 16 cases (75.0%) with all four risk factors. There were no significant correlations between individual risk factors and incidence, severity of arteriosclerosis in coronary and lower extremity arteries. In conclusion, angiographic evaluation of the coronary artery disease in patients with lower extremity arteriosclerosis is necessary because of the high chance of coronary artery disease and difficulty in the prediction of coronary artery disease with a severity of the peripheral arteriosclerosis, presence of various risk

Staff dosimetry and risk assessment during digestive and angiographic examinations

International Nuclear Information System (INIS)

Pages, J.; Osteaux, M.

2001-01-01

The use of ionizing radiation in medical applications involves not only a risk for the patient, but also for the staff which executed the related examinations. The dose to the forehead, neck, fingers and wrist of a radiologist and an assisting nurse were measured with thermoluminescent dosimeters during angiographic and digestive examinations respectively. Dose to eye lenses and effective dose were estimated for a working period of one year. Effective doses were under the established limit of 20 mSv per year. Nurse eye lens dose was higher than the limit of 150 mSv. Differences of a factor of 3.8 were observed between nurse and radiologist doses. Angiographic procedures are considered as high risk examinations, however, digestive examinations can have a higher risk than interventional procedures. (author)

Spontaneous coronary artery dissection: complete angiographic resolution without stenting

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Alexandre Abizaid

2007-09-01

Full Text Available A case of spontaneous coronary artery dissection in a 49-year-oldwoman is presented. She did not present the classical cardiovascular riskfactors. Etiology and treatment are discussed. She underwent primarypercutaneous coronary intervention of the left anterior descendingartery with no stenting and had complete angiographic resolution.

Mesenteric Castleman's disease: ultrasound, computed tomography and angiographic appearance

International Nuclear Information System (INIS)

Malara, F.A.; Price, D.; Fabiny

2000-01-01

The localized form of Castleman's disease is rare, and a mesenteric location is particularly unusual. A case of an asymptomatic young woman having the hyaline vascular type is presented and the ultrasound, computed tomography (CT) and angiographic features of the condition are demonstrated. Copyright (1999) Blackwell Science Pty Ltd

Angiographic Guidewire with Measuring Markers: Design and Clinical Experience

International Nuclear Information System (INIS)

Kamei, Seiji; Ishiguchi, Tsuneo; Murata, Katsuhito; Matsuda, Joe; Ohno, Ryota; Kimura, Junko; Nakamura, Atsushi; Ohno, Kazuko; Kawamura, Toshiki; Ikeda, Mitsuru

2006-01-01

Purpose. We have developed an angiographic guidewire with measuring markers to determine accurately how far a guidewire is inserted within a catheter. We investigated whether use of this guidewire reduces the risk of vascular injury and the fluoroscopic time during guidewire manipulations. Methods. Four markers were put on the surface of the guidewire at 80, 100, 110, and 120 cm from the tip. The actual lengths of 54 catheters from seven manufacturers were measured and compared with the nominal lengths. Sixty consecutive patients who underwent angiography were randomized into two groups: in one group guidewires with surface markers were used (marker group) and in the other group, conventional guidewires (control group). For each guidewire insertion, the fluoroscopic time before the guidewire was pushed forward into the vessel lumen was recorded. The number of occasions on which unintentionally the guidewire had already been pushed out of the catheter at the start of fluoroscopy was also evaluated. Results. The actual lengths of all catheters were greater than the nominal lengths by 1.0-11.0 cm. Mean fluoroscopic time for each guidewire insertion was 3.3 sec in the marker group and 5.7 sec in the control group (p < 0.05). Guidewires were unintentionally pushed out of the catheters without fluoroscopy three times (3.6%), in each case in the control group. Conclusion. The guidewire with measuring markers is effective for enhancing safety and in reducing fluoroscopic radiation during angiographic procedures. It is recommended that operators be aware that actual lengths of catheters may vary significantly from the nominal lengths listed; they should be aware of this with any guidewire, but particularly with the angiographic measuring guidewire

The relation between ankle-brachial index (ABI and coronary artery disease severity and risk factors: an angiographic study

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Masoumeh Sadeghi

2011-07-01

Full Text Available BACKGROUND: The current study aims to determine the relation between ankle–brachialindex (ABI and angiographic findings and major cardiovascular risk factors in patients withsuspected coronary artery diseases (CAD in Isfahan.METHODS: In this cross-sectional descriptive-analytic research, patients with suspected CADwere studied. Characteristics of studied subjects including demographics, familial history, pastmedical history and atherosclerotic risk factors such as diabetes mellitus, hypertension,hyperlipidemia and smoking were obtained using a standard questionnaire. ABI was measuredin all studied patients. ABI ≤ 0.9 (ABI+ was considered as peripheral vessel disease and ABI >0.9 (ABI- was considered as normal. Then, all studied patients underwent coronary arteryangiography. The results of the questionnaire and angiographic findings were compared in ABI+and ABI- groups. Data were analyzed by SPSS 15 using ANOVA, t-test, Spearman's rankcorrelation coefficient, and discriminant analysis.RESULTS: In this study, 125 patients were investigated. ABI ≤ 0.9 was seen in 25 patients (20%.The prevalence of ABI+ among men and women was 25.9% and 7.5%, respectively (P = 0.01. Theprevalence of atherosclerotic risk factors was significantly higher in ABI+ patients than in ABIones(P < 0.05. ABI+ patients had more significant stenosis than ABI- ones. The mean ofocclusion was significantly higher in ABI+ patients with left main artery (LMA, right coronaryartery (RCA, left anterior descending artery (LAD, diagonal artery 1 (D1 and left circumflexartery (LCX involvements (P < 0.05.CONCLUSION: The findings of this research indicated that ABI could be a useful method inassessing both the atherosclerotic risk factors and the degree of coronary involvements insuspected patients. However, in order to make more accurate decisions for using this method indiagnosing and preventing CAD, we should plan further studies in large sample sizes of generalpopulation

Angiographic diagnosis of hemorrhage tumours of the small intestine

International Nuclear Information System (INIS)

Vadon, G.; Ehngloner, L.; Petri, K.

1980-01-01

2 angiographic investigations in small intestine tumors, accompanied with hemorrhage are considered. Conclusion is made that the most suitable moment for estimation of small intestine hemorrhage, according to the proper and literature data, is selective angiography. Wide application of the technique for preoperative detection of gastro-inestinal hemorrhage is recommended

MR imaging assessment of cerebral vascular disease: A combination of angiographic and parenchymal techniques

International Nuclear Information System (INIS)

Masaryk, T.J.; Modic, M.T.; Ross, J.S.; Ruggieri, P.; Laub, G.; Haacke, E.M.

1988-01-01

This study tested the accuracy and clinical utility of a three-dimensional MR angiographic technique of the cervical carotids in combination with a routine spin-echo examination of the brain as a screening examination for cerebrovascular disease in 23 patients. The technique used a fast low-angle shot sequence with a reduced echo time and voxel size, gradient refocusing, and time of flight effects to minimize signal loss secondary to phase dispersion and maximize vessel contrast. Subsequent multiplanar three-dimensional reconstructions were obtained at 5 0 increments about the z-axis via ray-tracing linear thresholding algorithms. Examinations were compared with IV/IA-digital subtraction angiography or Doppler US as the objective of accuracy. Results of this ongoing study indicate that an MR angiographic screening examination can be coupled with routine brain MR imaging with only a 10-14 minute extension of examination time, providing both a vascular and a parenchymal evaluation

Internal carotid arterial occlusion in computed tomography. Correlation of CT and angiographic findings

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Harada, K.; Miura, T.; Nishikubo, Y.; Kawai, R.; Mitomo, M. (Osaka Univ. (Japan). Faculty of Medicine)

1981-09-01

The computed tomographic appearance of internal carotid arterial occlusion was reviewed in 33 patients. In 23 of them, who underwent 4-vessel study, the angiographic and CT findings were compared. Ten patients were disclosed to have watershed infarction by CT. Seven of them had watershed processes in the centrum semiovale which were considered to be terminal infarction. Patients who showed watershed infarction under CT revealed inadequate circle of Willis and well-developed cortical anastomosis under angiography. Unilaterally accentuated cerebral atrophy, which we have called asymmetrical atrophy in this paper, was noted in 10 patients. The findings of asymmetrical cerebral atrophy sometimes resemble the changes secondary to old infarction. However, the changes in the lateral ventricle caused by asymmetrical cerebral atrophy are somewhat different from those resulting from old infarction. The angiographic findings suggested that asymmetrical cerebral atrophy is, in addition to being associated with incomplete circle of Willis, also associated with local circulatory disturbances which further decrease the regional cerebral blood flow in the affected hemisphere.

CT and angiographic appearances of hepatocellular carcinoma partially fed by right inferior phrenic artery

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Ohtomo, Kuni; Furui, Shigeru; Yoshikawa, Hiroki; Yashiro, Naofumi; Araki, Tsutomu [Tokyo Univ. (Japan). Faculty of Medicine

1983-04-01

CT and angiographic appearances of 8 hepatocellular carcinomas which were partially fed by right inferior phrenic artery were discussed. CT demonstrated tumor fully occupied posterior segment of right hepatic lobe in 6 cases which were composed of 3 solitary massive, 2 massive nodular and 1 confluent massive angiographically. In the other 2 cases, CT showed encapsulated tumor in posterior inferior portion of posterior segment protruded from the liver. In 6 out of these 8 cases, tumor vessels and tumor stain were chiefly derived from posterior branch of right inferior phrenic artery.

CT and angiographic appearances of hepatocellular carcinoma partially feeded by right inferior phrenic artery

International Nuclear Information System (INIS)

Ohtomo, Kuni; Furui, Shigeru; Yoshikawa, Hiroki; Yashiro, Naofumi; Araki, Tsutomu

1983-01-01

CT and angiographic appearances of 8 hepatocellular carcinomas which were partially feeded by right inferior phrenic artery were discussed. CT demonstrated tumor fully occupied posterior segment of right hepatic lobe in 6 cases which were composed of 3 solitary massive, 2 massive nodular and 1 confluent massive angiographically. In the other 2 cases, CT showed encapsulated tumor in posterior inferior portion of posterior segment protruded from the liver. In 6 out of these 8 cases, tumor vessels and tumor stain were chiefly derived from posterior branch of right inferior phrenic artery. (author)

The pretzel sign: angiographic pattern of tortuous intra-aneurysmal blood flow in a giant serpentine aneurysm.

LENUS (Irish Health Repository)

Fanning, N F

2012-02-03

Giant serpentine aneurysms (GSAs) form a specific subgroup of giant cerebral aneurysms that have pathognomonic angiographic features. We report the angiographic findings of a GSA demonstrating a striking convoluted dynamic flow pattern, which we have called the \\'pretzel sign\\'. The aneurysm was successfully treated by permanent occlusion of the parent vessel using a detachable balloon. GSAs should be identified prior to treatment in view of their particular management requirements.

The value of regional wall motion abnormalities on gated mycardiac perfusion imaging in perfusion imaging in predicting angiographic stenoses of coronary artery

International Nuclear Information System (INIS)

Yao Lixin; Liu Binbin

2007-01-01

Objective: To determine the possible level of angiographic stenoses of coronary artery at which reversible regional wall motion abnormalities (RWMA) are present on 99m Tc-sestamibi ( 99m Tc-MIBI)-gated myocardial perfusion imaging (MPI). Methods: ninty patients undergoing coronary angiography MPI within two weeks were recruited. A five grades and nine segments marking system was introduced to assess the RWMA and thickening of left ventricles. Results: The sensitivity of reversible RWMA for detecting ≥75% angiographic stenoses was 64%,with a specificity of 95% and positive predictive value of 97%. The presence of reversible RWMA was able to stratify patients with severe angiographic stenoses of 75% or more from those less than 75% with high positive predictive value. A good correlation was noted between the presence of reversible RWMA and the coronary artery jeopardy score. Multivariate analysis showed that the post-stress RWMA and reversible RWMA scores and positive dipyridamole-stress exercise electrocardiogram(ECG) were significant predictors of angiographic severity. Conclusions: Reversible RWMA, as shown by dipyridamole stress 99m Tc-MIBI MPI, is a significant predictor of angiographic disease with very high specificity and adds incremental value to MPI for the assessment of angiographic severity. (authors)

Long-term Luminal Renarrowing After Successful Elective Coronary Angioplasty of Total Occlusions : A Quantitative Angiographic Analysis

NARCIS (Netherlands)

A.G. Violaris (Andonis); R. Melkert (Rein); P.W.J.C. Serruys (Patrick)

1995-01-01

textabstractBackground The long-term angiographic outcome after successful dilatation of coronary occlusions remains unclear. The objective of this study was to examine long-term restenosis after successful balloon dilatation of coronary occlusions at a predetermined time interval with quantitative

Evaluation of angiographic delayed vasospasm due to ruptured aneurysm in comparison with cerebral circulation time measured by IA-DSA

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Okada, Yoshikazu; Shima, Takeshi; Nishida, Masahiro; Yamane, Kanji; Okita, Shinji; Hatayama, Takashi; Yoshida, Akira; Naoe, Yasutaka; Shiga, Naoko (Chugoku Rosai Hospital, Hiroshima (Japan))

1994-05-01

Delayed vasospasm due to ruptured aneurysm has been basically evaluated by angiographic changes in contrast to clinical features such as delayed ischemic neurological deficits (DIND). However, the discrepancies between angiographic and clinical findings have been pointed out. In this study, angiographic changes and cerebral circulation time in ruptured aneurysms were simultaneously investigated with IA-DSA. Thirty-two patients, who had ruptured aneurysms at the anterior circle of Willis and neck clippings at the acute stage, were investigated. Carotid angiogram was performed with IA-DSA on the 7-13th day after the attack. Angiographic changes were evaluated by Fischer's classification and circulation time was calculated in the following way. A time-density curve was obtained at the two ROI's: the C3-C4 portion and the rolandic vein. Circulation time was defined by the difference between the time showing peak optical density at the carotid and the venous portion. The control value of this circulation time obtained from 20 cases with non-rupture aneurysm and epilepsy was 3.4 sec (53 year old) on the average. X-ray CT scan examination was performed at the same time and clinical features were observed every day. Angiographically, 3 cases were free from vasospasm, 18 cases were found to present slight to moderate vasospasm, and 11 cases showed severe vasospasm. Circulation time in patients with no spasm was 3.6 seconds, in patients with slight to moderate vasospasm it was 4.3 seconds and in patients with severe vasospasm it was 6.8 seconds. Ten patients showing cerebral infarction on CT scans demonstrated significantly long circulation time, 7.0 seconds on the average. And all patients having severe vasospasm with circulation time more than 6 seconds presented DIND such as hemiparesis. (author).

Insertion of central venous catheters for hemodialysis using angiographic techniques in patients with previous multiple catheterizations

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Kotsikoris, Ioannis, E-mail: gkotsikoris@gmail.com [Department of Vascular Surgery, “Erythros Stauros” General Hospital (Greece); Zygomalas, Apollon, E-mail: azygomalas@upatras.gr [Department of General Surgery, University Hospital of Patras (Greece); Papas, Theofanis, E-mail: pfanis@otenet.gr [Department of Vascular Surgery, “Erythros Stauros” General Hospital (Greece); Maras, Dimitris, E-mail: dimmaras@gmail.com [Department of Vascular Surgery, “Erythros Stauros” General Hospital (Greece); Pavlidis, Polyvios, E-mail: polpavlidis@yahoo.gr [Department of Vascular Surgery, “Erythros Stauros” General Hospital (Greece); Andrikopoulou, Maria, E-mail: madric@gmail.com [Department of Vascular Surgery, “Erythros Stauros” General Hospital (Greece); Tsanis, Antonis, E-mail: atsanis@gmail.com [Department of Interventional Radiology, “Erythros Stauros” General Hospital (Greece); Alivizatos, Vasileios, E-mail: valiviz@hol.gr [Department of General Surgery and Artificial Nutrition Unit, “Agios Andreas” General Hospital of Patras (Greece); Bessias, Nikolaos, E-mail: bessias@otenet.gr [Department of Vascular Surgery, “Erythros Stauros” General Hospital (Greece)

2012-09-15

Introduction: Central venous catheter placement is an effective alternative vascular access for dialysis in patients with chronic renal failure. The purpose of this study was to evaluate the insertion of central venous catheters for hemodialysis using angiographic techniques in patients with previous multiple catheterizations in terms of efficacy of the procedure and early complications. Materials and methods: Between 2008 and 2010, the vascular access team of our hospital placed 409 central venous catheters in patients with chronic renal failure. The procedure was performed using the Seldinger blind technique. In 18 (4.4%) cases it was impossible to advance the guidewire, and so the patients were transported to the angiography suite. Results: Using the angiographic technique, the guidewire was advanced in order to position the central venous catheter. The latter was inserted into the subclavian vein in 12 (66.6%) cases, into the internal jugular vein in 4 (22.2%) and into the femoral vein in 2 (11.1%) cases. There was only one complicated case with severe arrhythmia in 1 (5.5%) patient. Conclusion: Our results suggest that insertion of central venous catheters using angiographic techniques in hemodialysis patients with previous multiple catheterizations is a safe and effective procedure with few complications and high success rates.

Insertion of central venous catheters for hemodialysis using angiographic techniques in patients with previous multiple catheterizations

International Nuclear Information System (INIS)

Kotsikoris, Ioannis; Zygomalas, Apollon; Papas, Theofanis; Maras, Dimitris; Pavlidis, Polyvios; Andrikopoulou, Maria; Tsanis, Antonis; Alivizatos, Vasileios; Bessias, Nikolaos

2012-01-01

Introduction: Central venous catheter placement is an effective alternative vascular access for dialysis in patients with chronic renal failure. The purpose of this study was to evaluate the insertion of central venous catheters for hemodialysis using angiographic techniques in patients with previous multiple catheterizations in terms of efficacy of the procedure and early complications. Materials and methods: Between 2008 and 2010, the vascular access team of our hospital placed 409 central venous catheters in patients with chronic renal failure. The procedure was performed using the Seldinger blind technique. In 18 (4.4%) cases it was impossible to advance the guidewire, and so the patients were transported to the angiography suite. Results: Using the angiographic technique, the guidewire was advanced in order to position the central venous catheter. The latter was inserted into the subclavian vein in 12 (66.6%) cases, into the internal jugular vein in 4 (22.2%) and into the femoral vein in 2 (11.1%) cases. There was only one complicated case with severe arrhythmia in 1 (5.5%) patient. Conclusion: Our results suggest that insertion of central venous catheters using angiographic techniques in hemodialysis patients with previous multiple catheterizations is a safe and effective procedure with few complications and high success rates

Clinical-angiographic correlations in 132 patients with megadolichovertebrobasilar anomaly

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Resta, M; Gentile, M A; Di Cuonzo, F; Vinjau, E; Brindicci, D; Carella, A

1984-05-01

We have found numerous case reports, but no systematic study of the megadolichovertebrobasilar anomaly (MDVBA). The purpose of this paper is to evaluate the relationships between arterial shifts of the vertebro-basilar system and neurological findings in the posterios fossa in our series of 132 cases. We found a high percentage (77.3%) of angiographic-clinical correlations having evaluated the arterial shifts, measured in mm, of the vertebro basilar system in a frontal and a sagittal plane and concluded that the greater the degree of dislocation, the greater the number of Istituto di Radiologia Universita degli studi of Bari, positive cases. Nevertheless it is not possible to predetermine the presence of particular neurosymptomathology related to arterial dislocation degrees.

An angiographic technique for coronary fractional flow reserve measurement: in vivo validation.

Science.gov (United States)

Takarada, Shigeho; Zhang, Zhang; Molloi, Sabee

2013-03-01

Fractional flow reserve (FFR) is an important prognostic determinant in a clinical setting. However, its measurement currently requires the use of invasive pressure wire, while an angiographic technique based on first-pass distribution analysis and scaling laws can be used to measure FFR using only image data. Eight anesthetized swine were instrumented with flow probe on the proximal segment of the left anterior descending (LAD) coronary arteries. Volumetric blood flow from the flow probe (Qp), coronary pressure (Pa) and right atrium pressure (Pv) were continuously recorded. Flow probe-based FFR (FFRq) was measured from the ratio of flow with and without stenosis. To determine the angiography-based FFR (FFRa), the ratio of blood flow in the presence of a stenosis (QS) to theoretically normal blood flow (QN) was calculated. A region of interest in the LAD arterial bed was drawn to generate time-density curves using angiographic images. QS was measured using a time-density curve and the assumption that blood was momentarily replaced with contrast agent during the injection. QN was estimated from the total coronary arterial volume using scaling laws. Pressure-wire measurements of FFR (FFRp), which was calculated from the ratio of distal coronary pressure (Pd) divided by proximal pressure (Pa), were continuously obtained during the study. A total of 54 measurements of FFRa, FFRp, and FFRq were taken. FFRa showed a good correlation with FFRq (FFRa = 0.97 FFRq +0.06, r(2) = 0.80, p < 0.001), although FFRp overestimated the FFRq (FFRp = 0.657 FFRq + 0.313, r(2) = 0.710, p < 0.0001). Additionally, the Bland-Altman analysis showed a close agreement between FFRa and FFRq. This angiographic technique to measure FFR can potentially be used to evaluate both anatomical and physiological assessments of a coronary stenosis during routine diagnostic cardiac catheterization that requires no pressure wires.

Should incidental asymptomatic angiographic stenoses and occlusions be treated in patients with peripheral arterial disease?

LENUS (Irish Health Repository)

Keeling, Aoife N

2009-09-01

The clinical importance of angiographically detected asymptomatic lower-limb stenoses and occlusions is unknown. This study aims to (i) assess the clinical outcome of asymptomatic lesions in the lower limb, (ii) identify predictors of clinical deterioration, and (iii) determine which asymptomatic lower-limb lesions should be treated at presentation.

Angiographic differentiation of type of ventricular septal defects

International Nuclear Information System (INIS)

Cheon, Mal Soon; Park, Hee Young; Kim, Yang Sook

1989-01-01

Defects of the ventricular septum are the commonest type of congenital cardiac malformations. A classification with axial angiography of the subtypes of ventricular septal defects is proposed on the study of 126 patients with defects of the ventricular septum. The results were as follows: 1. The incidence of the ventricular septal defects was 39.6% of congenital heart malformation. 2. The sex distribution of cases were 70 males and 56 females, the age ranged from 13 months to 26 years. 3. Angiographic features seen by axial angiography were as follows: a. Perimembranous defects as seen on long axial view of left ventriculogram were in continuity wity aortic valve. The relation of the defect to the tricuspid valve allows distinction of the extension of the preimembranous defect toward inlet, trabecular, or infundibular zones. This relation was determined angiographically, using the course of the contrast medium from the left ventricle through the ventricular septal defect, opacifying the right ventricle. In inlet excavation, the shunted blood opacified the recess between septal leaflet of tricuspid valve and interventricular septum in early phase, in infundibular excavation, opacified the recess between anterior leaflet of tricuspid valve and anterior free wall of right ventricle and in trabecular excavation, the shunted blood traversed anterior portion of tricuspid valve ring, opacified trabecular portion of right ventricle. b. Muscular defects were separated from the semilunar and atrioventricular valves. c, Subarterial defects were related to both semilunar valves, and they were best demonstrated on the elongated right anterior oblique view of the left ventriculogram. d. Total infundibular defects were profiled in right anterior oblique 30 and long axial view, subaortic in location in both views

IMPORTANCE OF KNOWING ANGIOGRAPHIC CHARACTERISTICS OF THE TENSOR FASCIAE LATAE VASCULAR STALK

Directory of Open Access Journals (Sweden)

Sladjana Ugrenovic

2006-07-01

Full Text Available Atherosclerosis is the most important and most common type of arteriosclerosis and is a general term for several diseases in which the artery wall becomes thicker and less elastic. The most common location of atherosclerosis occurrence is arteries of lower extremities, while arteries of upper extremities as well as visceral arteries are far less and far rarely affected with this degenerative process.The most frequent ones are occlusive changes on bifurcation of the abdominal aorta (aortoiliac obstructive atherosclerosis “Morbus Leriche”, trunk of the femoral artery and initial part of the popliteal artery (femoropopliteal obstructive atherosclerosis.Angiography, as additional method in medicine, gives the most precise insight into anatomical changes on blood vessels. With intention of estimating the possibility of using a slice (lobe part of the tensor fasciae latae (m. TFL in plastic and reconstructive surgery, we have analyzed 50 angiograms of femoral artery. The first group included Morbus Leriche patients (25 analyzed angiographics, while the second one comprised patients with femoropopliteal segment disease (also 25 analyzed angiographics. With angiographic analysis of the lateral femoral circumflex artery (LCFA and its branch, which is dominant in vascularisation of m. TFL slice, we discovered that the diameter of its source, as well as of its branches, is bigger in cases of femoropopliteal segment disease. Then, the reduction of the source diameter of LCFA and its branches, caused by vascular disease, leads to decreased blood supply of m. TFL, diminishing its quality and limiting its usage in surgery.In Morbus Leriche cases, m. TFL slice cannot be used in plastic and reconstructive surgery, its quality being decreased, due to poor vascularization. In femoropopliteal segment disease cases, thanks to normal blood supply, m. TFL slice can be widely used for reconstructions or covering of defects, especially in inguinal region, which is

Time to Angiographic Reperfusion and Clinical Outcome after Acute Ischemic Stroke in the Interventional Management of Stroke Phase III (IMS III) Trial: A Validation Study

Science.gov (United States)

Khatri, Pooja; Yeatts, Sharon D.; Mazighi, Mikael; Broderick, Joseph P.; Liebeskind, David S.; Demchuk, Andrew M.; Amarenco, Pierre; Carrozzella, Janice; Spilker, Judith; Foster, Lydia D.; Goyal, Mayank; Hill, Michael D.; Palesch, Yuko Y.; Jauch, Edward C.; Haley, E. Clarke; Vagal, Achala; Tomsick, Thomas A.

2014-01-01

BACKGROUND The IMS III Trial did not demonstrate clinical benefit of the endovascular approach compared to IV rt-PA alone for moderate or severe ischemic strokes (NIHSS≥8) enrolled within three hours of stroke onset. Late reperfusion of tissue that is no longer salvageable may be one explanation, as suggested by prior exploratory studies showing an association between time to reperfusion and good clinical outcome. We sought to validate this relationship in the large-scale IMS III trial, and consider its implications for future endovascular trials. METHODS The analysis consisted of the endovascular cohort with proximal arterial occlusions in the anterior circulation that achieved angiographic reperfusion (TICI 2–3) during the endovascular procedure (within 7 hours from the onset of symptoms). Logistic regression was used to model good clinical outcome (90-day modified Rankin 0–2) as a function of the time to reperfusion, and prespecified variables were considered for adjustment. FINDINGS Among 240 proximal vessel occlusions, angiographic reperfusion (TICI 2–3) was achieved in 182 (76%). Mean time to reperfusion was 325 minutes (range 180–418 minutes). Longer time for reperfusion was associated with a decreased likelihood of good clinical outcome (RR [95% CI] for every 30 minute delay: unadjusted 0·85 [0·77–0·94]; adjusted 0·88 [0·80–0·98]). INTERPRETATION We confirm that delay in time to angiographic reperfusion leads to a decreased likelihood of good clinical outcome. Achieving rapid reperfusion may be critical for the successes of future acute endovascular trials. FUNDING: NIH/NINDS (study sponsor), Genentech Inc. (study drug - intra-arterial t-PA), EKOS Corp. (device), Concentric Inc. (device), Cordis Neurovascular, Inc. (device), and Boehringer Ingelheim (European Investigator Meeting support). PMID:24784550

Cerebral Angiographic Findings of Cosmetic Facial Filler-related Ophthalmic and Retinal Artery Occlusion

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Kim, Yong-Kyu; Jung, Cheolkyu; Woo, Se Joon; Park, Kyu Hyung

2015-01-01

Cosmetic facial filler-related ophthalmic artery occlusion is rare but is a devastating complication, while the exact pathophysiology is still elusive. Cerebral angiography provides more detailed information on blood flow of ophthalmic artery as well as surrounding orbital area which cannot be covered by fundus fluorescein angiography. This study aimed to evaluate cerebral angiographic features of cosmetic facial filler-related ophthalmic artery occlusion patients. We retrospectively reviewed...

Surgical Management of Juvenile Nasopharyngeal Angiofibroma Without Angiographic Embolization

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Raja Ahmad

2008-10-01

Full Text Available Juvenile nasopharyngeal angiofibroma (JNA is a rare benign neoplasm that occurs almost exclusively in the nasopharynx of adolescent males. Surgery remains the primary treatment of choice. JNA has always presented a management challenge to surgeons because of its vascular nature, site of occurrence, and local tissue destruction. The surgical approaches are either standard open method which include external or intraoral incisions, or the recent advanced approach, i.e. via using the endonasal endoscope. It is widely accepted that the use of preoperative angiographic embolization reduces the occurrence of intraoperative bleeding and facilitates tumour removal. However, angiographic embolization is not available at all centres. The purpose of this article is to present our experience with five patients diagnosed with JNA who were resected without embolization, using various surgical approaches. Two tumours were removed via endonasal endoscopic surgery. None of the tumours were embolized prior to surgery. We highlight the preoperative evaluation of tumour extent, using both computed tomography (CT and magnetic resonance angiography, and the importance of temporary clamping of the external carotid artery intraoperatively. Our results suggest that the latter procedure is a safe and effective means of facilitating surgery and reducing intraoperative bleeding.

CLINICAL AND ANGIOGRAPHIC PROFILE OF PATIENTS WITH COMPLETE HEART BLOCK

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Kavya Pingali

2017-05-01

Full Text Available BACKGROUND The angiographic findings and prognosis of patients with Complete Heart Block (CHB remain unclear. Thus, we aimed to study the clinical profile, risk factors, angiographic distribution and in-hospital outcomes of patients with complete heart block. MATERIALS AND METHODS This was a prospective, single-centred study which included 100 patients who came to the emergency department with CHB. Routine blood investigations including serum electrolytes were done. Coronary angiogram was done and lesions were assessed. Temporary pacemaker was implanted followed by permanent pacemakers in required patients, and in-hospital complications were noted down. RESULTS Commonest age group was above 60 years (75%. The patients were predominantly males. Most common presentation was chest pain (60%; there was regional wall motion abnormality in 30% patients. Degenerative complete heart block was seen in 34% patients, diphtheric myocarditis in 15%, hypokalaemic in 15%, dilated cardiomyopathy in 2%. Of total 53 patients had AV block, 14 had bifascicular block, 23 had LBBB, 6 had RBBB, 3 had Mobitz I and 1 had Mobitz II. Inferior wall myocardial infarction (MI was pervasively present in patients. Temporary pacemakers were implanted in 6 patients and permanent pacemakers in 43 patients. In-hospital outcomes constituted of complication like cardiogenic shock (10% and death (26%. The patients who died either had 80% -90% stenosis in RCA, triple vessel disease, ostioproximal LAD occlusion or diphtheric myocarditis. CONCLUSION Complete heart block was majorly associated with advanced age and inferior wall MI, virtually caused by dominant RCA occlusion. The in-hospital mortality was significantly higher in the patients with CHB.

Persistent sciatic artery: clinical, embryologic, and angiographic features

International Nuclear Information System (INIS)

Mandell, V.S.; Jaques, P.F.; Delaney, D.J.; Oberheu, V.

1985-01-01

The persistent sciatic artery is a rare but interesting and clinically pertinent vascular anomaly that may present as a buttock aneurysm or as an ischemic or embolic disease. Its correct angiographic diagnosis depends on recognition of an abnormally large internal iliac artery, appropriate injection and adequate timing to fill and follow flow into the large vessel, and recognition and differentiation of the tapering superficial femoral artery from routine occlusive disease so that an accurate picture of lower leg runoff is provided

Radioembolization with 90Y Microspheres: Angiographic and Technical Considerations

International Nuclear Information System (INIS)

Lewandowski, Robert J.; Sato, Kent T.; Atassi, Bassel; Ryu, Robert K.; Nemcek, Albert A.; Kulik, Laura; Geschwind, Jean-Francois; Murthy, Ravi; Rilling, William; Liu, David; Bester, Lourens; Bilbao, Jose Ignacio; Kennedy, Andrew S.; Omary, Reed A.; Salem, Riad

2007-01-01

The anatomy of the mesenteric system and the hepatic arterial bed has been demonstrated to have a high degree of variation. This is important when considering pre-surgical planning, catheterization, and trans-arterial hepatic therapies. Although anatomical variants have been well described, the characterization and understanding of regional hepatic perfusion in the context of radioembolization have not been studied with great depth. The purpose of this review is to provide a thorough discussion and detailed presentation of the angiographic and technical aspects of radioembolization. Normal vascular anatomy, commonly encountered variants, and factors involved in changes to regional perfusion in the presence of liver tumors are discussed. Furthermore, the principles described here apply to all liver-directed transarterial therapies

Diagnostic accuracy of unenhanced, contrast-enhanced perfusion and angiographic MRI sequences for pulmonary embolism diagnosis: results of independent sequence readings

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Revel, Marie Pierre [Hopital Europeen Georges Pompidou, APHP, Departments of Radiology, Paris (France); Universite Paris Descartes Sorbonne Paris Cite, Paris (France); Hotel-Dieu, Service de Radiologie, Paris (France); Sanchez, Olivier; Meyer, Guy [Hopital Europeen Georges Pompidou, APHP, Respiratory and intensive care and, Paris (France); Universite Paris Descartes Sorbonne Paris Cite, Paris (France); INSERM Unite 765, Paris (France); Lefort, Catherine; Couchon, Sophie; Hernigou, Anne; Frija, Guy [Hopital Europeen Georges Pompidou, APHP, Departments of Radiology, Paris (France); Niarra, Ralph [Hopital Europeen Georges Pompidou, APHP, Clinical Epidemiology, Paris (France); Universite Paris Descartes Sorbonne Paris Cite, Paris (France); Chatellier, Gilles [Hopital Europeen Georges Pompidou, APHP, Clinical Epidemiology, Paris (France); Universite Paris Descartes Sorbonne Paris Cite, Paris (France); INSERM CIC-EC E4, Paris (France)

2013-09-15

To independently evaluate unenhanced, contrast-enhanced perfusion and angiographic MR sequences for pulmonary embolism (PE) diagnosis. Prospective investigation, including 274 patients who underwent perfusion, unenhanced 2D steady-state-free-precession (SSFP) and contrast-enhanced 3D angiographic MR sequences on a 1.5-T unit, in addition to CTA (CT angiography). Two independent readers evaluated each sequence independently in random order. Sensitivity, specificity, predictive values and inter-reader agreement were calculated for each sequence, excluding sequences judged inconclusive. Sensitivity was also calculated according to PE location. Contrast-enhanced angiographic sequences showed the highest sensitivity (82.9 and 89.7 %, reader 1 and reader 2, respectively), specificity (98.5 and 100 %) and agreement (kappa value 0.77). Unenhanced angiographic sequences, although less sensitive overall (68.7 and 76.4 %), were sensitive for the detection of proximal PE (92.7 and 100 %) and showed high specificity (96.1 and 99.1 %) and good agreement (kappa value 0.62). Perfusion sequences showed lower sensitivity (75.0 and 79.3 %), specificity (84.8 and 89.7 %) and agreement (kappa value 0.51), and a negative predictive value of 84.8 % at best. Compared with contrast-enhanced angiographic sequences, unenhanced sequences demonstrate lower sensitivity, except for proximal PE, but high specificity and agreement. The negative predictive value of perfusion sequences was insufficient to safely rule out PE. (orig.)

Effect of Asparagus racemosus on fracture healing in rabbits: a radiographic and angiographic study

International Nuclear Information System (INIS)

Singh, Sunil; Singh, H.N.; Gangwar, A.K.; Devi, Kh. Sangeeta; Waghay, J.Y.

2009-01-01

New Zealand white rabbits (18) were randomly divided into groups I and II (control) having 9 animals in each group. The fracture of ulna was created in each animal under general anaesthesia using thiopental sodium (2.5%). Radius acted as a natural splint. The animals of group I were fed with powdered Asparagus racemosus along with rabbit feed throughout the study period. However, in group II animals only powdered rabbit feed was given. Healing at the fracture site was assessed by plain radiography and angiography at 7th, 14th, 21st and 28th day interval. Radiographical observation revealed a well organized and dense callus at 21st day in animals of group I whereas in animals of group II, callus of slightly less radiographic density was observed at this interval. Angiographic observation revealed hypervascularity at the fracture site at 7th and 14th day interval in group I animals. On day 14, in group II animals major vessels lack continuity along with reduced vascularity around the fracture site. The results of present study suggest that feeding of dry root powder of Asparagus racemosus promotes early fracture healing in rabbits

The value of regional wall motion abnormalities on 99Tcm-MIBI gated cardiac SPECT in predicting angiographic stenoses of coronary artery

International Nuclear Information System (INIS)

Li Dianfu; Huang Jun; Zhu Tiebing; Wang Liansheng; Yang Zhijian; Feng Jianlin; Li Jianhua; Chen Jianwei; Chang Guojun

2004-01-01

Objective: To determine the magnitude of angiographic stenoses of coronary artery in reversible regional wall motion abnormalities (RWMA) present in exercise stress 99 Tc m -methoxyisobutylisonitrile (MIBI) gated SPECT myocardial perfusion imaging (MPI). Methods: One hundred and sixteen patients undergoing coronary angiography two weeks before and after the exercise stress 99 Tc m -MIBI gated SPECT MPI. Images were acquired 15 to 20 min after stress. A five grades and twenty segments marking system was introduced to assess the RWMA and thickening of left ventricles. Results: The sensitivity of reversible RWMA for detecting ≥75% angiographic stenoses was 65%, with a specificity of 97%. Reversible RWMA has a high positive predictive value (98%) for stratification between severe angiographic stenoses of 75% and non-severe stenoses (less than 75%). Multivariate analysis showed that the post-stress wall motion (SSSWM), exercise wall motion differentiation value (SDSWM) and summed stress score (SSS) were the independent risk factor of coronary artery jeopardy score. Conclusions: Reversible RWMA, as shown by exercise stress 99 Tc m -MIBI gated SPECT MPI, is a significant predictor of angiographic disease with very high specificity and positive predictive values. Exercise reversible RWMA can rise the assessment value of angiographic severity in MPI

Angiographic findings of collateral vessels in cervicofacial vascular lesions with previously ligated carotid artery

International Nuclear Information System (INIS)

Na, Dong Gyu; Han, Moon Hee; Chang, Kee Hyun; Han, Gi Seok; Yeon, Kung Mo

1995-01-01

The purpose of this study is to describe the angiographic findings of collateral vessels in cervicofacial vascular lesions with previously ligated carotid arteries and to evaluate the extent of angiographic assessment needed before embolization. We retrospectively reviewed 10 cervicofacial vascular lesions with previously ligated carotid artery, which were 6 cases of arteriovenous malformation, 2 cases of carotid cavernous fistula, 1 case of hemangioma and 1 case of arteriovenous malformation with carotid cavernous fistula. The previously ligated arteries are proximal external carotid artery (n = 5), branches of external carotid artery (n = 2) and common carotid artery (n = 3). Common carotid artery or internal carotid artery (n = 9), vertebral artery (n = 5), ipsilateral external carotid artery (n = 4), contralateral external carotid artery (n = 5), costocervical trunk (n = 2), thyrocervical trunk (n = 2) were assessed by conventional angiography. Angiography of both carotid and vertebral arteries was performed in 5 cases. The collateral vascular channels were inferolateral trunk of internal carotid artery (n = 8), vertebral artery (n = 5), contralateral external carotid artery (n = 5), ipsilateral external carotid artery (n = 4), deep cervical artery (n = 2) and ascending cervical artery (n = 1). Embolization were performed in 9 cases with operative cannulation (n = 4), embolization via collateral branches of ipsilateral external carotid artery (n = 1), embolization via collateral branches of contralateral external carotid artery (n = 3) and balloon occlusion via direct puncture (n = 1). The collateral channels in cervicofacial vascular lesions with previously ligated carotid artery were inferolateral trunk of internal carotid artery, contralateral or ipsilateral external carotid artery, vertebral artery, deep cervical artery and ascending cervical artery on angiography. Complete angiographic assessment of possible collateral channels is mandatory for the

Early Angiographic Resolution of Cerebral Vasospasm with High Dose Intravenous Milrinone Therapy

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F. A. Zeiler

2015-01-01

Full Text Available Background. Treatment of symptomatic delayed cerebral ischemia (DCI after subarachnoid hemorrhage (SAH is difficult. Recent studies suggest intravenous (IV high dose milrinone as a potential therapy. The timing to angiographic response with this is unclear. Methods. We reviewed the chart of one patient admitted for SAH who developed symptomatic DCI and was treated with high dose IV milrinone. Results. A 66-year-old female was admitted with a Hunt and Hess clinical grade 4, World Federation of Neurological Surgeons (WFNS clinical grade 4, and SAH secondary to a left anterior choroidal artery aneurysm which was clipped. After bleed day 6, the patient developed symptomatic DCI. We planned for angioplasty of the proximal segments. We administered high dose IV milrinone bolus followed by continuous infusion which led to clinical improvement prior to angiography. The angiogram performed 1.5 hours after milrinone administration displayed resolution of the CT angiogram and MRI based cerebral vasospasm such that further intra-arterial therapy was aborted. She completed 6 days of continuous IV milrinone therapy, was transferred to the ward, and subsequently rehabilitated. Conclusions. High dose IV milrinone therapy for symptomatic DCI after SAH can lead to rapid neurological improvement with dramatic early angiographic improvement of cerebral vasospasm.

Five-year clinical and functional multislice computed tomography angiographic results after coronary implantation of the fully resorbable polymeric everolimus-eluting scaffold in patients with de novo coronary artery disease

DEFF Research Database (Denmark)

Onuma, Yoshinobu; Dudek, Dariusz; Thuesen, Leif

2013-01-01

This study sought to demonstrate the 5-year clinical and functional multislice computed tomography angiographic results after implantation of the fully resorbable everolimus-eluting scaffold (Absorb BVS, Abbott Vascular, Santa Clara, California).......This study sought to demonstrate the 5-year clinical and functional multislice computed tomography angiographic results after implantation of the fully resorbable everolimus-eluting scaffold (Absorb BVS, Abbott Vascular, Santa Clara, California)....

Background Complex angiographic lesions and clinic presentation in unstable angina. A prospective study

International Nuclear Information System (INIS)

LLuberas, R.; Mallo, D.; Pouso, J.; Artucio, C.; Korytnicki; Argon, L.; Besada, E.; Tavella, N.

2002-01-01

Background Complex angiography lesions and intracoronary thrombus have been identified in unstable angina.Braunwalds categorization has been accepted in the last years.Identifying severe clinical classes class III (angina at rest during the last 48 hours), class C (angina postinfarction) and class c (angina with maximum therapeutic). The main objective of this study was to determine independent associations of Braunwalds classes III, C and c: complex lesions, intracoronary thrombus, total occlusion and distal flux TIMI<3 of the responsible vessel. The secondary objectives were to analyze the angiographic features of the lesion and the responsible vessel. Aprospective study of 300 patients with diagnosed unstable angina, clustered according to Braunwalds clinis classification was done. The angiographic evaluation was performed identifying the responsible lesion and the presence of the complex lesion, intracoronary thrombus, total occlusion and distal flux TIMI<3 of the responsible vessel. A univariate analysis and a multivariate model of binary logistic regression were used. In the 300 patient population, 22 patients with normal coronaries(7.3%) were identified. The responsible lesion was identified in 243 out of the remaining 278 patients (87,4%). Class III was significantly associated with the complex lesion (OR=2.74, IC95%=1,27-5,9) and intracoronary thrombus (OR=2,82 IC95=1,2-6,6). Class C was significantly associated with intracoronary thrombus (OR=3.9),IC95%=1.53-10,0).Class III was and independent predictor for the presence of the complex lesion(OR=1.98, IC 95%=1,01-3,87) and intracoronary thrombus (OR=2,47 IC95%=1,14-5,37). Class C was and independent predictor for the complex lesion (OR=5,05,IC95%=2.25-11,3), infracoronary thrombus (OR=8,04, IC 95%=3,49-18,0), total occlusion (OR=6,49, IC95%=2,67-15,7) and distal flux TIMI<3(OR=3,96,IC 95%=1,87-8,4) There was no significant association between classes III, C and c and the responsible vessel, localization of

Quantitative stress-redistribution planar T1-201 scintigraphy: Assessment of the extent of hypoperfused myocardium by relationship to angiographic findings

International Nuclear Information System (INIS)

Bassir, R.; Maddahi, J.; Garcia, E.

1984-01-01

The size of hypoperfused myocardium (HM) in coronary artery (CA) disease (D) potentially provides a prognostic index that may not be accurately assess by conventional angiographic classification. The authors studied 62 consecutive patients (pts) with planar stress-redistribution T1-201 scintigraphy (T1-201) and coronary arteriography who did not have prior myocardial infarction and achieved 85% predicted maximum heart rate on exercise. Of 62 pts, 42 had CAD (>50% stenosis). For T1-201 quantification of the size of HM, maximum count circumferential profiles of initial distribution and % washout were obtained and compared to previously established normal limits. The area enclosed between the normal limits and the abnormal portion of the pt's profiles represented a quantitative T1-201 jeopardy score (JS). Despite increasing T1-201 JS from 1 to 3 vessel (V) and left-main (LM) D, significant overlap between the different angiographic groups was observed; of 45 pts with mild JS (<300), 14 (31%) had 3VD and/or LMD. The angiographic extent of CAD was also analyzed using a method (CLASS) proposed by Gensini et al based on the CA territory, location and severity of stenosis, and collateral circulation. T1-201 JS correlated significantly with CLASS (r=.78, p<.01). Of the 45 pts with mild JS, only 5 (11%) had severe CLASS score. Thus, the size of the hypoperfused myocardium by quantitative stress- and redistribution T1-201 correlates better with a more complex angiographic estimate of myocardium at risk than conventional 1, 2, and 3 vessel disease classification

Comparative quantitative angiographic analysis of directional coronary atherectomy and balloon coronary angioplasty

NARCIS (Netherlands)

V.A.W.M. Umans (Victor); K.J. Beatt (Kevin); B.J.W.M. Rensing (Benno); W.R.M. Hermans (Walter); P.J. de Feyter (Pim); P.W.J.C. Serruys (Patrick)

1991-01-01

markdownabstract__Abstract__ An attempt to assess the “utility” of directional atherectomy was made using a new quantitative angiographic index. This index can be subdivided into an initial gain component and a restenosis component. The initial gain index is the ratio between the gain in diameter

Determination of optimal angiographic viewing angles: Basic principles and evaluation study

International Nuclear Information System (INIS)

Dumay, A.C.M.; Reiber, J.H.C.; Gerbrands, J.J.

1994-01-01

Foreshortening of vessel segments in angiographic (biplane) projection images may cause misinterpretation of the extent and degree of coronary artery disease. The views in which the object of interest are visualized with minimum foreshortening are called optimal views. In this paper the authors present a complete approach to obtain such views with computer-assisted techniques. The object of interest is first visualized in two arbitrary views. Two landmarks of the object are manually defined in the two projection images. With complete information of the projection geometry, the vector representation of the object in the three-dimensional space is computed. This vector is perpendicular to a plane in which the views are called optimal. The user has one degree of freedom to define a set of optimal biplane views. The angle between the central beams of the imaging systems can be chosen freely. The computation of the orientation of the object and of corresponding optimal biplane views have been evaluated with a simple hardware phantom. The mean and the standard deviation of the overall errors in the calculation of the optimal angulation angles were 1.8 degree and 1.3 degree, respectively, when the user defined a rotation angle

Hemodynamic disturbances in cerebral ischemia; Correlation between positron emission tomographic and angiographic findings

Energy Technology Data Exchange (ETDEWEB)

Tenjin, Hiroshi; Ueda, Satoshi; Mizukawa, Norihiko; Imahori, Yoshio; Hino, Akihiko; Ohmori, Yoshio [Kyoto Prefectural Univ. of Medicine (Japan); Nakahashi, Hisamitsu

1993-04-01

Proper treatment of ischemic stroke requires better understanding of cerebral hemodynamic changes. The hemodynamic changes associated with ischemia were measured using positron emission tomography and related to angiographic findings in the subacute and chronic stages of 17 ischemia patients who showed symptoms of main trunk stenosis of the internal carotid artery system. The hemodynamic factors, cerebral blood flow, cerebral blood volume, cerebral metabolic rate for oxygen, oxygen extraction fraction, and flow/volume ratio, were measured in regions of interest determined from the angiographic stenosis (over 50%) and compared in each stage. The cerebral blood flow and flow/volume ratio in the territory downstream of the main trunk stenosis and cerebral metabolic rate for oxygen in the whole cortex were decreased in the subacute stage. In the chronic stage, cerebral blood flow and flow/volume ratio decreased mainly in borderzone areas. (author).

Development of a Portable Training Tool for Simulating Visceral Angiographic Procedures for Beginners

International Nuclear Information System (INIS)

Yamagami, Takuji; Osuga, Keigo; Yoshimatsu, Rika; Matsumoto, Tomohiro; Miura, Hiroshi; Terayama, Koshi; Anai, Hiroshi; Takahashi, Masahide; Hasebe, Terumitsu; Nishimura, Tsunehiko

2009-01-01

The purpose of this study was to evaluate the usefulness of a tool that we developed to simulate performance of visceral angiography to train beginners in the field of splanchnic angiography. Seven residents and two fellows who were rotating within the Division of Interventional Radiology at our institution between June and August 2008 participated in the evaluation of this tool. They had no experience in performing visceral angiography as an operator. Time for selection of arterial branches arising from the celiac axis on the model was measured before and after training. After such training, the participants performed actual visceral angiography as an operator with instructors beside them. Success of the trainees in selecting visceral arterial branches was evaluated in these real-life cases. In the first test using the model, seven of nine trainees (77.8%) succeeded in selecting all required arteries, while the remaining two failed to select all required arteries. After training using the model, all trainees succeeded in selecting all required arteries just before the actual angiographic study. In the actual angiography, the catheter was successfully inserted from the femoral artery and advanced to the superior mesenteric, celiac, splenic, common hepatic, gastroduodenal, and right and left hepatic arteries by all trainees with only two exceptions. In conclusion, this tool is helpful for training beginners in visceral angiographic procedures.

The predictive value of angiographic results for the outcome of percutaneous transluminal angioplasty in stenosed femoral bypass grafts

International Nuclear Information System (INIS)

Spijkerboer, Anje M.; Beek, Frederik J. A.; Graaf, Yolanda van der; Eikelboom, Bert C.; Mali, Willem P. T. M.

1997-01-01

Purpose. To assess the predictive value of immediate angiographic results after percutaneous transluminal angioplasty (PTA) for stenoses in femoral bypass grafts using duplex ultrasound (DUS) criteria. Methods. A 1-year follow-up with DUS was performed in 38 patients with 50 stenoses in 41 grafts, treated with PTA for a graft stenosis. The indication for PTA according to DUS criteria was a severe stenosis in 43 lesions, and a moderate stenosis in 7 lesions. In the moderate stenosis group 3 patients showed claudication and 1 patient had a nonhealing ulcer. For the purposes of statistical evaluation, primary patency was considered present if the graft was not occluded. The graft was considered to have failed when it was found to be occluded on DUS, or when secondary interventions (surgery, repeat PTA) were performed. Results. After 1 year the cumulative primary patency rate was 44$ [95% confidence interval (CI) 27.8-59.8]. Stenoses with initially good angiographic results after PTA (<30% residual stenosis) were 2.9 times more likely to be patent at 1 year than stenoses with initially poor or moderate angiographic results (hazard ratio 2.9, 95% CI 1.3-6.4,p=0.007). Conclusion. A poor or moderate angiographic result immediately following PTA was prognostic for poor long-term results and may indicate a requirement for earlier surgical intervention

C-reactive protein and angiographic characteristics of stable and unstable coronary artery disease : Data from the prospective PREVEND cohort

NARCIS (Netherlands)

Geluk, C.A.; Post, W.J.; Hillege, H.L.; Tio, R.A.; Tijssen, J.G.; van Dijk, R.B.; Dijk, Willem; Bakker, S.J.; de Jong, P.E.; van Gilst, W.H.; Zijlstra, F.

Aims: High sensitive-C-reactive protein (hs-CRP) is associated with coronary risk, which may be explained by an association with (unstable) coronary artery disease (CAD). Until now, histopathological and angiographic studies have failed to consistently demonstrate a strong relationship. However,

Influence of angiographic collateral circulation on myocardial perfusion in patients with chronic total occlusion of a single coronary artery and no prior myocardial infarction.

Science.gov (United States)

Aboul-Enein, Fatma; Kar, Saibal; Hayes, Sean W; Sciammarella, Maria; Abidov, Aiden; Makkar, Raj; Friedman, John D; Eigler, Neal; Berman, Daniel S

2004-06-01

The functional role of various angiographic grades for coronary collaterals remains controversial. The aim of this study was to assess the influence of the Rentrop angiographic grading of coronary collaterals on myocardial perfusion in patients with single-vessel chronic total occlusion (CTO) and no prior myocardial infarction (MI). The study included 56 patients with single-vessel CTO and no prior MI who underwent rest-stress myocardial perfusion SPECT and coronary angiography within 6 mo. All patients had angiographic evidence of coronary collaterals. Patients were divided according to the Rentrop classification: Group I had grade 1 or 2 (n = 25) and group II had grade 3 collaterals (n = 31). Group I had a higher frequency of resting regional wall motion abnormalities on left ventriculography (52.6% vs. 19.2% [P = 0.019]). The mean perfusion scores of the overall population showed severe and extensive stress perfusion defects (summed stress score of 14.1 +/- 7.1 and summed difference score of 12.9 +/- 6.9) but minimal resting perfusion defects (summed rest score of 1.0 +/- 2.7). No perfusion scores differed between the 2 groups. The perfusion findings suggested that chronic stunning rather than hibernation is the principal cause of regional wall motion abnormalities in these patients. In the setting of single-vessel CTO and no prior MI, coronary collaterals appear to protect against resting perfusion defects. Excellent angiographic collaterals may prevent resting regional wall motion abnormalities but do not appear to protect against stress-induced perfusion defects.

Quantitative 4D Transcatheter Intraarterial Perfusion MR Imaging as a Method to Standardize Angiographic Chemoembolization Endpoints

Science.gov (United States)

Jin, Brian; Wang, Dingxin; Lewandowski, Robert J.; Ryu, Robert K.; Sato, Kent T.; Larson, Andrew C.; Salem, Riad; Omary, Reed A.

2011-01-01

PURPOSE We aimed to test the hypothesis that subjective angiographic endpoints during transarterial chemoembolization (TACE) of hepatocellular carcinoma (HCC) exhibit consistency and correlate with objective intraprocedural reductions in tumor perfusion as determined by quantitative four dimensional (4D) transcatheter intraarterial perfusion (TRIP) magnetic resonance (MR) imaging. MATERIALS AND METHODS This prospective study was approved by the institutional review board. Eighteen consecutive patients underwent TACE in a combined MR/interventional radiology (MR-IR) suite. Three board-certified interventional radiologists independently graded the angiographic endpoint of each procedure based on a previously described subjective angiographic chemoembolization endpoint (SACE) scale. A consensus SACE rating was established for each patient. Patients underwent quantitative 4D TRIP-MR imaging immediately before and after TACE, from which mean whole tumor perfusion (Fρ) was calculated. Consistency of SACE ratings between observers was evaluated using the intraclass correlation coefficient (ICC). The relationship between SACE ratings and intraprocedural TRIP-MR imaging perfusion changes was evaluated using Spearman’s rank correlation coefficient. RESULTS The SACE rating scale demonstrated very good consistency among all observers (ICC = 0.80). The consensus SACE rating was significantly correlated with both absolute (r = 0.54, P = 0.022) and percent (r = 0.85, P SACE rating scale demonstrates very good consistency between raters, and significantly correlates with objectively measured intraprocedural perfusion reductions during TACE. These results support the use of the SACE scale as a standardized alternative method to quantitative 4D TRIP-MR imaging to classify patients based on embolic endpoints of TACE. PMID:22021520

Angiographic evaluation of the effect of intra-arterial milrinone therapy in patients with vasospasm from aneurysmal subarachnoid hemorrhage.

Science.gov (United States)

Shankar, Jai Jai Shiva; dos Santos, Marlise P; Deus-Silva, Leonardo; Lum, Cheemun

2011-02-01

Several methods have been used to treat cerebral vasospasm, which is a major cause of morbidity and mortality in patients with aneurysmal subarachnoid hemorrhage (SAH). Here, we examined the effectiveness and safety of intra-arterial injection of milrinone for the treatment of vasospasm. Consecutive patients with angiographically confirmed vasospasm received intra-arterial milrinone between January 2006 and December 2007. The improvement in diameter of vessel (in millimeters) following treatment was assessed by paired t test for statistical significance. The angiographic improvement of supraclinoid internal carotid artery, M1 segment of middle cerebral artery, and A1 and A2 segment of anterior cerebral artery was compared with the modified Rankin score of the patients at discharge. A total of 15 milrinone treatments were performed in 14 patients (11 females and 3 males) with mean age of 52.7 years (31-68 years). There was significant angiographic improvement after milrinone therapy (p milrinone was a safe and effective treatment of cerebral vasospasm following aneurysmal SAH.

Angiographic manifestation and transcatheter arterial embolization of proper esophageal artery in hemoptysis

International Nuclear Information System (INIS)

Jiang Sen; Zhu Xiaohua; Sun Xiwen; Zhi Wenxiang; Jie Bing; You Zhengqian; Yu Dong; Peng Gang

2008-01-01

Objective: To investigate the angiographic manifestation of the proper esophageal artery (PEA), the high risk factors for the presence of the anomalous PEA in hemoptysis and to evaluate the safety of transcatheter arterial embolization (TAE) of the PEA using gelatin sponge (GS). Methods: Selective esophageal arteriography was performed in forty-three patients with hemoptysis, including 15 cases of pulmonary tuberculosis, 18 cases of bronchiectasis, 7 cases of posttuberculous bronchiectasis and three cases of lung cancer. One case experienced failure of bronchial arterial embolization. The angiographic manifestation of the PEAs was studied. The complications of the procedure and clinical results were observed in the patients who underwent TAE using GS. Results: Thirty-nine PEAs were catheterized selectively in 37 patients (86.0%). Eighteen anomalous PEAs (46.2%) were catheterized selectively in 17 patients (45.9%). The anomalous PEAs showed tortuosity, dilatation, hyperplasia, shunting with pulmonary artery and anastomosis with the bronchial artery. All lesions involved basal segment of inferior pulmonary lobar. Bronchiectasis was the most frequent disease for PEA abnormality. No complications occurred and satisfactory curative effect was achieved with TAE of the anomalous PEAs. Conclusions: It is necessary to perform selective proper esophageal arteriography when the lesion involves basal segment of inferior pulmonary lobar in hemoptysis. Supplemental TAE of the anomalous PEA using GS is safe and valuable in the management of hemoptysis. (authors)

Angiographic Findings and Embolotherapy in Renal Arterial Trauma

International Nuclear Information System (INIS)

Sofocleous, Constantinos T.; Hinrichs, Clay; Hubbi, Basil; Brountzos, Elias; Kaul, Sanjeev; Kannarkat, George; Bahramipour, Philip; Barone, Alison; Contractor, Daniel G.; Shah, Tanmaya

2005-01-01

Purpose To evaluate the angiographic findings and embolotherapy in the management of traumatic renal arterial injury Methods This is a retrospective review of 22 patients with renal trauma who underwent arteriography and percutaneous embolization from December 1995 to January 2002. Medical records, imaging studies and procedural reports were reviewed to assess the type of injury, arteriographic findings and immediate embolization results. Long-term clinical outcome was obtained by communication with the trauma physicians and by clinical chart review.Results Arteriography was performed in 125 patients admitted to a State Trauma Center with suspected internal bleeding. Renal arterial injury was documented in 22 and was the result of a motor-vehicle accident (10), auto-pedestrian accident (1), gunshot (4) or stab wounds (6) and a fall (1). Percutaneous renal arterial embolization was undertaken in 22 of 125 (18%) patients to treat extravasation (11), arterial pedicle rupture (5), abnormal arteriovenous (3) or arteriocalyceal (2) communication and pseudoaneurysm (3). One of the pseudoaneurysms and one of the arteriovenous fistulae were found in addition to extravasation. All 22 patients (16 men, 6 women) were hemodynamically stable, or controlled during arteriography and embolotherapy. Selective and/or superselective embolization of the abnormal vessels was performed using coils in 9 patients, microcoils in 9 patients and Gelfoam pledgets in 3 patients. In one patient Gelfoam pledgets mixed with polyvinyl alcohol (PVA) particles were used for embolization. Immediate angiographic evidence of hemostasis was demonstrated in all cases. Two initial technical failures were treated with repeat arteriography and embolization. There was no procedure-related death. There was no non-target embolization. One episode of renal abscess after embolization was treated by nephrectomy and 3 patients underwent elective post-embolization nephrectomy to prevent infection. Follow-up ranged

Transit-time flow measurement as a predictor of coronary bypass graft failure at one year angiographic follow-up

DEFF Research Database (Denmark)

Lehnert, Per; Møller, Christian H; Damgaard, Sune

2015-01-01

on graft vessel type, anastomatic configuration, and coronary artery size. RESULTS: Nine hundred eighty-two coronary anastomoses were performed of which 12% had signs of graft failure at one year angiographic follow-up. In internal mammary arteries (IMAs), analysis showed a 4% decrease in graft failure......BACKGROUND: Transit-time flow measurement (TTFM) is a commonly used intraoperative method for evaluation of coronary artery bypass graft (CABG) anastomoses. This study was undertaken to determine whether TTFM can also be used to predict graft patency at one year postsurgery. METHODS: Three hundred...... forty-five CABG patients with intraoperative graft flow measurements and one year angiographic follow-up were analyzed. Graft failure was defined as more than 50% stenosis including the "string sign." Logistic regression analysis was used to analyze the risk of graft failure after one year based...

Differential Clinical Outcomes Between Angiographic Complete Versus Incomplete Coronary Revascularization, According to the Presence of Chronic Kidney Disease in the Drug-Eluting Stent Era.

Science.gov (United States)

Kim, Jihoon; Lee, Joo Myung; Choi, Ki Hong; Rhee, Tae-Min; Hwang, Doyeon; Park, Jonghanne; Ahn, Chul; Park, Taek Kyu; Yang, Jeong Hoon; Song, Young Bin; Choi, Jin-Ho; Hahn, Joo-Yong; Choi, Seung-Hyuk; Gwon, Hyeon-Cheol

2018-02-15

There are limited data regarding the prognostic impact of angiographic complete revascularization (CR) in patients with chronic kidney disease (CKD). We sought to investigate the differential prognostic impact of angiographic CR over incomplete revascularization (IR), according to the presence of CKD in the drug-eluting stent era. Between 2003 and 2011 at Samsung Medical Center, consecutive patients with multivessel disease were stratified by the presence of CKD (estimated glomerular filtration rate <60 mL/min per 1.73 m 2 ) and classified according to angiographic CR (residual SYNTAX score=0) or IR. Clinical outcomes were compared between angiographic CR and IR, stratified by the presence of CKD. Primary outcome was patient-oriented composite outcomes (POCO, a composite of all-cause death, myocardial infarction, any revascularization) at 3 years. Inverse probability weighting was performed between the CR and IR groups. A total of 3224 patients were eligible for analysis: 2295 without CKD; 929 with CKD. Among non-CKD patients, angiographic CR showed a significantly lower risk of POCO than IR (17.2% versus 21.7%, adjusted hazard ratio 0.76, 95% confidence interval, 0.62-0.95, P =0.014), mainly driven by a significantly lower risk of any revascularization. Among CKD patients, however, angiographic CR was associated with a significantly higher risk of POCO than IR (37.7% versus 28.4%, adjusted hazard ratio 1.42, 95% confidence interval, 1.08%-1.85%, P =0.011), mainly driven by a significantly higher risk of nonfatal target vessel myocardial infarction. Angiographic CR was associated with reduced risk of POCO than IR in patients without CKD; however, it was associated with a significantly higher risk of POCO and nonfatal myocardial infarction in CKD patients. © 2018 The Authors. Published on behalf of the American Heart Association, Inc., by Wiley.

Angiographic evaluation of response to preoperative chemotherapy in osteosarcoma

International Nuclear Information System (INIS)

Carrasco, C.H.; Charnsangavej, C.; Richii, W.; Wallace, S.; Chawla, S.P.; Raymond, A.K.; Murray, J.A.; Benjamin, R.S.

1986-01-01

Preoperative chemotherapy for osteosarcoma facilitates local resection for limb salvage and serves as an in vivo chemosensitivity assay. Arteriograms obtained with each intraarterial course of cisplatin in 79 patients with osteosarcoma were evaluated. Complete remission was defined as complete or nearly complete disappearance of tumor vascularity after treatment. A minimal decrease, no change, or an increase in tumor vascularity was not considered a response. If a complete remission is assumed to represent ≥ 90% histologic tumor necrosis which correlates with prolonged disease-free survival, the sensitivity of an angiographic complete remission was 95%, the specificity was 58%, the predictive value of a negative study was 90%, and the predictive value of a positive study was 75%. Angiography is the best clinical technique for evaluating the therapeutic response in osteosarcoma. Results correlate well with the degree of tumor necrosis, particularly in respect to significant residual viable tumor

Clinical presentations and MRI findings of angiographically occult vascular malformations

International Nuclear Information System (INIS)

Kida, Yoshihisa; Kobayashi, Tatsuya; Tanaka, Takayuki; Oyama, Hirofumi; Iwakoshi, Takayasu

1994-01-01

Various clinical features as well as MRI findings of AOVM (angiographically occult vascular malformation) were studied. Amongst out patients, since January 1988, there have been 30 cases of symptomatic AOVM (20 males, 10 females) including 4 cases with multiple lesions. The age ranged from 3 to 60 years of age, with a mean of 33.4 years. The locations of symptomatic lesions were in the cerebral hemisphere (15), the thalamus (4), the brain stem (8) and in the cerebellum (3). The initial presentations of these 30 cases were either by hemorrhage (18), convulsive seizure (9) or by progressive neurological deficits (3). The initial presentation was not related to the patient's age and the size of the lesion, but apparently related to the location of AOVM. Most of the lesions in the cerebral hemisphere presented seizures, but all of the lesions in the thalamus, the brain stem and the cerebellum disclosed hemorrhage as an initial presentation. In fact it was noticed that brain stem lesions tend to cause repetitive hemorrhage in a relatively short period. AOVM lesions were clearly visualized with T2-weighted MRI images, consisting of high intensity cores with surrounding low intensity rims. Most of the symptomatic lesions were partially enhanced by Gd-DTPA with varied intensity. Dynamic changes in size and enhancement pattern on MRI were occasionally seen, usually accompanied with episodes such as hemorrhage or neurological deterioration. Although AOVMs were angiographically negative some strands indicating draining veins were observed on MRI in several cases. In contrast, none of the nonsymptomatic lesions (22 lesions) demonstrated enhancement effects with Gd-DTPA. (author)

Metallic Limus-Eluting Stents Abluminally Coated with Biodegradable Polymers: Angiographic and Clinical Comparison of a Novel Ultra-Thin Sirolimus Stent Versus Biolimus Stent in the DESTINY Randomized Trial.

Science.gov (United States)

Lemos, Pedro A; Abizaid, Alexandre A C; Meireles, George C; Sarmento-Leite, Rogério; Prudente, Mauricio; Cantarelli, Marcelo; Dourado, Adriano D; Mariani, Jose; Perin, Marco A; Costantini, Costantino; Costa, Ricardo A; Costa, José Ribamar; Chamie, Daniel; Campos, Carlos A; Ribeiro, Expedito

2015-12-01

To evaluate the outcomes of patients treated with a new drug-eluting stent formulation with low doses of sirolimus, built in an ultra-thin-strut platform coated with biodegradable abluminal coating. This study is a randomized trial that tested the main hypothesis that the angiographic late lumen loss of the novel sirolimus-eluting stent is noninferior compared with commercially available biolimus-eluting stent. A final study population comprising 170 patients with one or two de novo lesions was randomized in the ratio 2:1 for sirolimus-eluting stent or biolimus-eluting stent, respectively. The primary endpoint was 9-month angiographic in-stent late lumen loss. Adverse clinical events were prospectively collected for 1 year. After 9 months, the novel sirolimus-eluting stent was shown noninferior compared with the biolimus stent for the primary endpoint (angiographic in-stent late lumen loss: 0.20 ± 0.29 mm vs. 0.15 ± 0.20 mm, respectively; P value for noninferiority <0.001). The 1-year incidence of death, myocardial infarction, repeat revascularization, and stent thrombosis remained low and not significantly different between the groups. The present randomized trial demonstrates that the tested novel sirolimus-eluting stent was angiographically noninferior in comparison with a last-generation biolimus-eluting stent. © 2015 John Wiley & Sons Ltd.

A new self-expanding nitinol stent (Enterprise) for the treatment of wide-necked intracranial aneurysms: initial clinical and angiographic results in 31 aneurysms

Energy Technology Data Exchange (ETDEWEB)

Weber, Werner; Kuehne, Dietmar [Alfried Krupp Hospital, Department of Radiology and Neuroradiology, Essen (Germany); Bendszus, Martin; Solymosi, Laszlo [University of Wuerzburg, Department of Neuroradiology, Wuerzburg (Germany); Kis, Bernhard [University of Duisburg-Essen, Research Unit, Rheinische Kliniken Essen, Department of Psychiatry and Psychotherapy, Essen (Germany); Boulanger, Thierry [Centre Hospitalier of Luxembourg, Service of Neuroradiology, Luxembourg (Luxembourg)

2007-07-15

We report the results of a prospective clinical study using a new self-expanding nitinol stent (Enterprise) designed for the treatment of wide-necked intracranial aneurysms. We treated 31 saccular, wide-necked intracranial aneurysms in 30 patients. Ten aneurysms had recanalized after prior endovascular treatment without a stent, and 21 aneurysms had not been treated before. Stent deployment was successful in all procedures. Additional coil embolization was performed in all aneurysms. Initial complete angiographic occlusion was achieved in 6 aneurysms, a neck remnant was left in 18 aneurysms and there were 7 residual aneurysms. Angiographic follow-up examinations of 30 lesions after 6 months demonstrated 15 complete occlusions, 8 neck remnants and 7 residual aneurysms. One patient refused the 6-month angiographic follow-up. Spontaneous occlusion of the aneurysm had occurred in 14 patients, and 6 aneurysms showed recanalization. Four of these residual aneurysms were retreated. At the 6-month follow-up, 29 parent arteries were unaffected, whereas two parent vessels demonstrated minor asymptomatic narrowing at the stent site. Two patients experienced one or more possible or probable device-related serious adverse events during the 6-month follow-up period. There was no procedural morbidity or mortality at 6 months after the procedure. The reported results demonstrated the safety and feasibility of the Cordis Neurovascular Enterprise stent in the treatment of wide-necked intracranial aneurysms. Initial clinical and angiographic results are favorable. (orig.)

Registration of angiographic image on real-time fluoroscopic image for image-guided percutaneous coronary intervention.

Science.gov (United States)

Kim, Dongkue; Park, Sangsoo; Jeong, Myung Ho; Ryu, Jeha

2018-02-01

In percutaneous coronary intervention (PCI), cardiologists must study two different X-ray image sources: a fluoroscopic image and an angiogram. Manipulating a guidewire while alternately monitoring the two separate images on separate screens requires a deep understanding of the anatomy of coronary vessels and substantial training. We propose 2D/2D spatiotemporal image registration of the two images in a single image in order to provide cardiologists with enhanced visual guidance in PCI. The proposed 2D/2D spatiotemporal registration method uses a cross-correlation of two ECG series in each image to temporally synchronize two separate images and register an angiographic image onto the fluoroscopic image. A guidewire centerline is then extracted from the fluoroscopic image in real time, and the alignment of the centerline with vessel outlines of the chosen angiographic image is optimized using the iterative closest point algorithm for spatial registration. A proof-of-concept evaluation with a phantom coronary vessel model with engineering students showed an error reduction rate greater than 74% on wrong insertion to nontarget branches compared to the non-registration method and more than 47% reduction in the task completion time in performing guidewire manipulation for very difficult tasks. Evaluation with a small number of experienced doctors shows a potentially significant reduction in both task completion time and error rate for difficult tasks. The total registration time with real procedure X-ray (angiographic and fluoroscopic) images takes [Formula: see text] 60 ms, which is within the fluoroscopic image acquisition rate of 15 Hz. By providing cardiologists with better visual guidance in PCI, the proposed spatiotemporal image registration method is shown to be useful in advancing the guidewire to the coronary vessel branches, especially those difficult to insert into.

Clinical Investigation of Radiation Retinopathy Fundus and Fluorescein Angiographic Features

Institute of Scientific and Technical Information of China (English)

LiMei; QiuGT

1999-01-01

Purpose:To investigate the fundus and fluorescein angiographic features in the patients with radiation retinopathy.Clinical Materials:Color fundus photography and/or fluorescein angiography from 13 patients with nasopharyngeal carcinomas received external beam radiation were retrospectively analyzed.Reslts:In this study,26 damaged eyes of 13 patients eveloped some degree of radiation retinopathy.The earliest and most common finding was macular microvascular changes (microaneurysms and/or telangiectasia),which was observed in 100%(26/26)of the eyes.Intraretinal hemorrhages,macular capillary nonperfusion,and macular edema were noted in 84%,50%,and 42% of the eyes,respectively.Conclusions:Radiation retinopathy is common after external beam radiation of nasopharyngeal carcinomas.The prominent changes include maular microvascular changes,intraretinal hemorrhages and macular capillary nonperfusion.

Correlation of C-Reactive Protein and Cardiac Enzymes with Angiographic Severity of Coronary Artery Disease in Pakistani Patients with Acute Coronary Syndrome.

Science.gov (United States)

Saleem, Ayesha; Ali, Azmat

2017-02-01

To determine the correlation of C-reactive protein (CRP) levels with the severity of coronary stenosis on angiography and the association of cardiac enzymes with the degree of stenosis in acute coronary syndrome (ACS) patients. Secondly, to compare association of angiographic severity of vascular stenosis with CRP in patients with ST segment elevation myocardial infarction (STEMI) and non-STEMI / Unstable angina (UA). Prospective, descriptive study. Khan Research Laboratories (KRL) Hospital, from October 2014 to March 2015. CRP was measured on diagnosis of ACS in 70 patients. Cardiac enzymes were measured 6 hours after the onset of chest pain. Angiographic scoring for degree of stenosis and number of culprit vessels was done. Two groups consisting of patients with STEMI (group 1) and with NSTEMI/UA (group 2) were made. No correlation was found between CRP levels and angiographic stenosis in patients with ACS (r=0.162, p>0.05). No association was found between eosinophil count and severity of stenosis (p=0.88). Rise of cardiac enzymes and degree of coronary stenosis showed a positive correlation (p Rise in cardiac enzymes still grade high in predicting severity of vascular stenosis than eosinophil count or CRP levels.

Angiographic patterns of carotid-cavernous fistulas

International Nuclear Information System (INIS)

Georgieva, G.; Jekova, M.; Genov, P.; Hadjidekov, V.

2006-01-01

Full text: The aim of the study is to present our experience in angiographic evaluation of carotid-cavernous fistulas. 8 patients with carotid-cavernous fistula (6 men and 2 women, range of age from 15 to 62) are included in the study out of all undergone cerebral angiography for a four year period (1996 - 2000). All patients underwent CT brain examination, two out of 8 - MRI. Visualization of ipsi- and contra lateral cavernous sinus and ophthalmic vein dilatation are assessed. In all cases the communication between the internal carotid artery and the cavernous sinus has been assessed as direct. Near simultaneous visualization of the home internal carotid artery, the dilated ipsilateral cavernous sinus and dilated superior ophthalmic vein is found in 2 patients, simultaneous visualization of both cavernous sinuses - in two. In 1 patient the early visualization of the cavernous sinus through the fistula enabled visualization of ipsilateral main internal carotid artery from the contra lateral circulation through the communicating arteries.In 1 excessive contralateral cavernous sinus and contralateral superior ophthalmic vein dilatation is detected. In other 1 excessive flow to dilated ipsilateral cavernous sinus lead insufficient circulation in distal vessels. Digital subtraction Angiography remains the most suitable imaging method in carotid-cavernous fistula assessment regarding type of communication and level of following vessels morphology changes

Corrected thrombolysis in myocardial infarction frame counts in diabetic patients with angiographically normal coronary arteries

International Nuclear Information System (INIS)

Turkoglu, S.; Ozdemir, M.; Tacoy, G.; Tavil, Y.; Abaci, A.; Timurkaynak, T.; Cengel, A.

2008-01-01

Objective was to evaluate corrected thrombolysis in myocardial infarction (TIMI) frame count (CTFC) in patients with angiographically normal coronary arteries and diabetes mellitus, a condition known to be associated with microvascular dysfunction. Patients who underwent coronary angiography in Gazi University Hospital, Ankara, Turkey between January 2000 and January 2005 were studied. Corrected TIMI frame count was left circumflex (Cx) and right coronary arteries (RCA) in 118 diabetic and 122 non-diabetic patients with normal coronary angiogram. The mean CTFC values of the LAD, Cx and the RCA were similar in diabetics and nondiabetics (21.0+-7.5 versus 21.3+-9.6, 23.3+-9.7 versus 23.5+-10.8, 17.9+-6.7 versus 18.7+-7.4 respectively, p>0.05 for all comparisons). In stepwise multivariate linear regression analysis, body surface area had a significant correlation with CTFC of all the 3 coronary arteries. We conclude that CTFC in diabetics and non-diabetics with angiographically normal coronary arteries is similar. Since microvascular disease is an inherent component of diabetes, our finding may reflect the inadequacy of CTFC in predicting microvascular disease in diabetic patients with normal coronary angiograms. (author)

Comparison of equilibrium radionuclide and contrast angiographic measurements of left ventricular peak ejection and filling rates and their time intervals

Energy Technology Data Exchange (ETDEWEB)

Sugrue, D.D.; Dickie, S.; Newman, H.; Myers, M.J.; Lavender, J.P.; McKenna, W.J. (Royal Postgraduate Medical School, London (UK))

1984-10-01

A comparison has been made of the equilibrium radionuclide and contrast angiographic estimates of normalized peak rates of ejection (PER) and filling (PFR) and their time intervals in twenty-one patients with cardiac disorders. Contrast angiographic and radionuclide measurements of left ventricular ejection fraction (LVEF), PER and PFR correlated well but time intervals correlated poorly. Mean values for radionuclide LVEF, PER and PFR were significantly lower and radionuclide time intervals were significantly longer compared to contrast angiography measurements.

Chest pain in patients with arterial hypertension, angiographically normal coronary arteries and stiff aorta: the aortic pain syndrome.

Science.gov (United States)

Stakos, Dimitrios A; Tziakas, Dimitrios N; Chalikias, George; Mitrousi, Konstantina; Tsigalou, Christina; Boudoulas, Harisios

2013-01-01

Arterial hypertension is often associated with a stiff aorta as a result of collagen accumulation in the aortic wall and may produce chest pain. In the present study, possible interrelationships between aortic function, collagen turnover and exercise-induced chest pain in patients with arterial hypertension and angiographically normal coronary arteries were investigated. Ninety-seven patients with arterial hypertension, angiographically normal coronary arteries and no evidence of myocardial ischemia on nuclear cardiac imaging during exercise test were studied. Of these, 43 developed chest pain during exercise (chest pain group) while 54 did not (no chest pain group). Carotid femoral pulse-wave velocity (PWVc-f) was used to assess the elastic properties of the aorta. Amino-terminal pro-peptides of pro-collagen type I, (PINP, reflecting collagen synthesis), serum telopeptides of collagen type I (CITP, reflecting collagen degradation), pro-metalloproteinase 1 (ProMMP-1), and tissue inhibitor of metalloproteinase 1 (TIMP-1, related to collagen turnover) were measured in plasma by immunoassay. The chest pain group had higher PWVc-f, higher and /CITP ratio, and lower proMMP-1/ TIMP-1 ratio compared to the no chest pain group. PWVc-f (t=2.53, p=0.02) and PINP (t=2.42, p=0.02) were independently associated with the presence of chest pain in multiple regression analysis. Patients with arterial hypertension, exercise-induced chest pain and angiographically normal coronary arteries, without evidence of exercise-induced myocardial ischemia, had a stiffer aorta compared to those without chest pain. Alterations in collagen type I turnover that favor collagen accumulation in the aortic wall may contribute to aortic stiffening and chest pain in these patients.

Brachytherapy using holmium-166 liquid balloon system for in-stent restenosis: 6 months clinical and angiographic follow-up

Energy Technology Data Exchange (ETDEWEB)

Kim, M. H.; Kim, S. K.; Cha, K. S.; Kim, Y. D.; Lee, H. S.; Kang, D. Y. [Donga University College of Medicine, Busan (Korea, Republic of)

2002-07-01

In western country, 3 systems of brachytherapy using commercial radioactive source has been established. However, brachytherapy using holmium-166 liquid balloon system (HLBS) for the patient with stent restenosis has not been studied enough. 30 patients (male 23, mean age 58.9 7.7) were enrolled. Target dose was 15 Gy at 1 mm distance from the intimal surface. Clinical diagnoses of the study patients included stable angina 10 and unstable angina 20 patients. Target lesion included LAD 19, LCx 5 and RCA 6 arteries. Pre-brachytherapy treatment included cutting balloon angioplasty in 25, rotational atherectomy in 5 patients. Fractionation and stepping was done in 6 patients each. Follow-up angiography was done in 19 patients. Of them, 4 cases developed angiographic restenosis (21%) including 3 cases of total occlusion. 6 month MACE (major adverse cardiac event) occurred in 5 patients including one sudden cardiac death in a patient with 80 year-old, triple-vessel diseased patient. Vascular brachytherapy using HLBS is a safe and effective treatment modality for in-stent restenosis showing acceptable angiographic and clinical result.

The association of elastin gene variants with two angiographic subtypes of polypoidal choroidal vasculopathy.

Directory of Open Access Journals (Sweden)

Suiho Yanagisawa

Full Text Available To compare the association of elastin (ELN gene variants between two different angiographic phenotypes of polypoidal choroidal vasculopathy (PCV.We included 411 treatment-naïve PCV patients and 350 controls in the present study. PCV was classified into two phenotypes (152 Type 1 and 259 Type 2 according to the presence or absence of feeding vessels found in indocyanine-green angiography. Single nucleotide polymorphisms (SNPs in the ELN region including rs868005, rs884843, rs2301995, rs13239907 and rs2856728 were genotyped using TaqMan Genotyping Assays.In the allelic association analyses, rs868005 showed the strongest association with Type 2 PCV (allelic odds ratio 1.56; p = 7.4x10(-6, while no SNP was significantly associated with Type 1 PCV. Genotype association analyses revealed the significant association of rs868005 with Type 2 PCV in log additive model and predominant model (odds ratio 1.75; p = 1.5x10(-6 and odds ratio 1.60; p = 0.0044, respectively, but not with Type 1 PCV. These findings were further corroborated by another control group in the literature.There may be significantly different associations in genetic variants of elastin between two angiographic phenotypes of PCV.

Micro-angiographic system using synchrotron radiation and conventional x-ray source for visualizing angiogenic vessels induced by cardiovascular regeneration therapy

International Nuclear Information System (INIS)

Mori, H.; Chiku, M.; Nishigami, K.; Tanaka, E.; Kimura, K.; Kawai, T.; Suzuki, K.; Mochizuki, R.; Okawa, Y.

2004-01-01

Therapeutic angiogenesis improved critical limb and myocardial ischemia in human, however, angiogenic vessels were not visualized well by conventional angiography, because of its limited spatial resolution of 200 μm. Recently, synchrotron radiation system characterized by high brightness, monochromatic and collimated nature revealed the micro-vessels of heart and lower limb in situ. We developed also an in-house microangiographic system with a relatively low cost. Limb ischemia models were made by ligature of femoral artery and treated by angiogenic growth factor genes and so on. One month after the treatment, we evaluated collateral micro-vessels by using the conventional and micro-angiographic systems. The approach was left femoral artery, and catheter was located in abdominal aorta. Iodine contrast (300 mg/ml) was injected 5 ml by 3 ml/sec with auto-injection system. The imaging was recorded by digital source in 1000 x 1000 pixels. The micro-angiographic system could detect the micro-vessels more precisely than conventional angiographic system and evaluate their function. (author)

Angiographically Negative Acute Arterial Upper and Lower Gastrointestinal Bleeding: Incidence, Predictive Factors, and Clinical Outcomes

International Nuclear Information System (INIS)

Kim, Jin Hyoung; Shin, Ji Hoon; Yoon, Hyun Ki; Chae, Eun Young; Myung, Seung Jae; Ko, Gi Young; Gwon, Dong Il; Sung, Kyu Bo

2009-01-01

To evaluate the incidence, predictive factors, and clinical outcomes of angiographically negative acute arterial upper and lower gastrointestinal (GI) bleeding. From 2001 to 2008, 143 consecutive patients who underwent an angiography for acute arterial upper or lower GI bleeding were examined. The angiographies revealed a negative bleeding focus in 75 of 143 (52%) patients. The incidence of an angiographically negative outcome was significantly higher in patients with a stable hemodynamic status (p < 0.001), or in patients with lower GI bleeding (p = 0.032). A follow-up of the 75 patients (range: 0-72 months, mean: 8 ± 14 months) revealed that 60 of the 75 (80%) patients with a negative bleeding focus underwent conservative management only, and acute bleeding was controlled without rebleeding. Three of the 75 (4%) patients underwent exploratory surgery due to prolonged bleeding; however, no bleeding focus was detected. Rebleeding occurred in 12 of 75 (16%) patients. Of these, six patients experienced massive rebleeding and died of disseminated intravascular coagulation within four to nine hours after the rebleeding episode. Four of the 16 patients underwent a repeat angiography and the two remaining patients underwent a surgical intervention to control the bleeding. Angiographically negative results are relatively common in patients with acute GI bleeding, especially in patients with a stable hemodynamic status or lower GI bleeding. Most patients with a negative bleeding focus have experienced spontaneous resolution of their condition

Angiographically Negative Acute Arterial Upper and Lower Gastrointestinal Bleeding: Incidence, Predictive Factors, and Clinical Outcomes

Energy Technology Data Exchange (ETDEWEB)

Kim, Jin Hyoung; Shin, Ji Hoon; Yoon, Hyun Ki; Chae, Eun Young; Myung, Seung Jae; Ko, Gi Young; Gwon, Dong Il; Sung, Kyu Bo [Asan Medical Center, Seoul (Korea, Republic of)

2009-08-15

To evaluate the incidence, predictive factors, and clinical outcomes of angiographically negative acute arterial upper and lower gastrointestinal (GI) bleeding. From 2001 to 2008, 143 consecutive patients who underwent an angiography for acute arterial upper or lower GI bleeding were examined. The angiographies revealed a negative bleeding focus in 75 of 143 (52%) patients. The incidence of an angiographically negative outcome was significantly higher in patients with a stable hemodynamic status (p < 0.001), or in patients with lower GI bleeding (p = 0.032). A follow-up of the 75 patients (range: 0-72 months, mean: 8 {+-} 14 months) revealed that 60 of the 75 (80%) patients with a negative bleeding focus underwent conservative management only, and acute bleeding was controlled without rebleeding. Three of the 75 (4%) patients underwent exploratory surgery due to prolonged bleeding; however, no bleeding focus was detected. Rebleeding occurred in 12 of 75 (16%) patients. Of these, six patients experienced massive rebleeding and died of disseminated intravascular coagulation within four to nine hours after the rebleeding episode. Four of the 16 patients underwent a repeat angiography and the two remaining patients underwent a surgical intervention to control the bleeding. Angiographically negative results are relatively common in patients with acute GI bleeding, especially in patients with a stable hemodynamic status or lower GI bleeding. Most patients with a negative bleeding focus have experienced spontaneous resolution of their condition.

Angiographic prevalence and pattern of coronary artery disease in women.

Science.gov (United States)

Ezhumalai, Babu; Jayaraman, Balachander

2014-01-01

There are not many studies describing the prevalence and pattern of "coronary artery disease" (CAD) in women undergoing "coronary angiography" (CAG). Hence, uncertainty thrives with regard to the angiographic prevalence and pattern of CAD in women. Our objective was to study the prevalence and pattern of CAD among women undergoing CAG. Data of 500 women who underwent CAG for suspected CAD over 3 years were retrospectively analyzed. They were classified into young group (age right coronary artery. Bifurcation lesion involving distal left main coronary artery is the most prevalent pattern of LMD. There has been a change with regard to clinical presentation and onset of risk factors for CAD at young age, but the load of atherosclerotic burden and pattern of involvement of coronary arteries have not changed in women. Copyright © 2014 Cardiological Society of India. Published by Elsevier B.V. All rights reserved.

Effective dose and dose to crystalline lens during angiographic procedures

International Nuclear Information System (INIS)

Pages, J.

1998-01-01

The highest radiation doses levels received by radiologists are observed during interventional procedures. Doses to forehead and neck received by a radiologist executing angiographic examinations at the department of radiology at the academic hospital (AZ-VUB) have been measured for a group of 34 examinations. The doses to crystalline lens and the effective doses for a period of one year have been estimated. For the crystalline lens the maximum dose approaches the ICRP limit, that indicates the necessity for the radiologist to use leaded glasses. (N.C.)

Angiographic embolization in the treatment of intrahepatic arterial bleeding in patients with blunt abdominal trauma.

Science.gov (United States)

Kong, Ya-Lin; Zhang, Hong-Yi; He, Xiao-Jun; Zhao, Gang; Liu, Cheng-Li; Xiao, Mei; Zhen, Yu-Ying

2014-04-01

Angiographic embolization (AE) as an adjunct non-operative treatment of intrahepatic arterial bleeding has been widely used. The present study aimed to evaluate the efficacy of selective AE in patients with hepatic trauma. Seventy patients with intrahepatic arterial bleeding after blunt abdominal trauma who had undergone selective AE in 10 years at this institution were retrospectively reviewed. The criteria for selective AE included active extravasation on contrast-enhanced CT, an episode of hypotension or a decrease in hemoglobin level during the non-operative treatment. The data of the patients included demographics, grade of liver injuries, mechanism of blunt abdominal trauma, associated intra-abdominal injuries, indications for AE, angiographic findings, type of AE, and AE-related hepatobiliary complications. In the 70 patients, 32 (45.71%) had high-grade liver injuries. Extravazation during the early arterial phase mainly involved the right hepatic segments. Thirteen (18.57%) patients underwent embolization of intrahepatic branches and the extrahepatic trunk and these patients all developed AE-related hepatobiliary complications. In 19 patients with AE-related complications, 14 received minimally invasive treatment and recovered without severe sequelae. AE is an adjunct treatment for liver injuries. Selective and/or super-selective AE should be advocated to decrease the incidence and severity of AE-related hepatobiliary complications.

A characteristic of angiographic cone-beam CT

International Nuclear Information System (INIS)

Takase, Tadashi; Take, Toshio; Nakazawa, Yasuo; Kinouchi, Katsunori

2009-01-01

Angiographic cone-beam CT, called DynaCT by SIEMENS, is a 3D imaging tool reconstructed from projection data by a rotational C-arm with a flat panel detector. It can visualize low-contrast objects such as soft tissue or small vessels as well as high-contrast structures such as enhanced vessels or bone. We need to understand its image characteristics and dose distribution during 200 degree rotation around a patient. In this research, we evaluated fundamental characteristics and dose effectiveness for optimized clinical images. DynaCT, including soft tissue information and isochronal voxel data along the z-axis, could provide enough CT-like image quality for interventional radiology (IVR) use. In addition, evaluation of accumulated dose distribution helped us to predict and avoid the occurrence of radiodermatitis. Thus, DynaCT is useful as a support and navigation tool for IVR. (author)

Bronchial and non-bronchial systemic arteries: value of multidetector CT angiography in diagnosis and angiographic embolisation feasibility analysis

International Nuclear Information System (INIS)

Lin, Yuning; Chen, Ziqian; Yang, Xizhang; Zhong, Qun; Zhang, Hongwen; Yang, Li; Xu, Shangwen; Li, Hui

2013-01-01

The aim of this study is to evaluate the diagnostic performance of multidetector CT angiography (CTA) in depicting bronchial and non-bronchial systemic arteries in patients with haemoptysis and to assess whether this modality helps determine the feasibility of angiographic embolisation. Fifty-two patients with haemoptysis between January 2010 and July 2011 underwent both preoperative multidetector CTA and digital subtraction angiography (DSA) imaging. Diagnostic performance of CTA in depicting arteries causing haemoptysis was assessed on a per-patient and a per-artery basis. The feasibility of the endovascular treatment evaluated by CTA was analysed. Sensitivity, specificity, and positive and negative predictive values for those analyses were determined. Fifty patients were included in the artery-presence-number analysis. In the per-patient analysis, neither CTA (P=0.25) nor DSA (P=1.00) showed statistical difference in the detection of arteries causing haemoptysis. The sensitivity, specificity, and positive and negative predictive values were 94%, 100%, 100%, and 40%, respectively, for the presence of pathologic arteries evaluated by CTA, and 98%, 100%, 100%, and 67%, respectively, for DSA. On the per-artery basis, CTA correctly identified 97% (107/110). Fifty-two patients were included in the feasibility analysis. The performance of CTA in predicting the feasibility of angiographic embolisation was not statistically different from the treatment performed (P=1.00). The sensitivity, specificity, and positive and negative predictive values were 96%, 80%, 98% and 67%, respectively, for CTA. Multidetector CTA is an accurate imaging method in depicting the presence and number of arteries causing haemoptysis. This modality is also useful for determining the feasibility of angiographic embolisation for haemoptysis.

Sub-clinical assessment of atopic dermatitis severity using angiographic optical coherence tomography

Science.gov (United States)

Byers, Robert A.; Maiti, Raman; Danby, Simon G.; Pang, Elaine J.; Mitchell, Bethany; Carré, Matt J.; Lewis, Roger; Cork, Michael J.; Matcher, Stephen J.

2018-01-01

Measurement of sub-clinical atopic dermatitis (AD) is important for determining how long therapies should be continued after clinical clearance of visible AD lesions. An important biomarker of sub-clinical AD is epidermal hypertrophy, the structural measures of which often make optical coherence tomography (OCT) challenging due to the lack of a clearly delineated dermal-epidermal junction in AD patients. Alternatively, angiographic OCT measurements of vascular depth and morphology may represent a robust biomarker for quantifying the severity of clinical and sub-clinical AD. To investigate this, angiographic data sets were acquired from 32 patients with a range of AD severities. Deeper vascular layers within skin were found to correlate with increasing clinical severity. Furthermore, for AD patients exhibiting no clinical symptoms, the superficial plexus depth was found to be significantly deeper than healthy patients at both the elbow (p = 0.04) and knee (p<0.001), suggesting that sub-clinical changes in severity can be detected. Furthermore, the morphology of vessels appeared altered in patients with severe AD, with significantly different vessel diameter, length, density and fractal dimension. These metrics provide valuable insight into the sub-clinical severity of the condition, allowing the effects of treatments to be monitored past the point of clinical remission. PMID:29675335

Long-term clinical and angiographic results of Sirolimus-Eluting Stent in Complex Coronary Chronic Total Occlusion Revascularization: the SECTOR registry.

Science.gov (United States)

Galassi, Alfredo R; Tomasello, Salvatore D; Costanzo, Luca; Campisano, Maria B; Barrano, Giombattista; Tamburino, Corrado

2011-10-01

Drug-eluting stents showed a better angiographic and clinical outcome in comparison with bare metal stent in chronic total occlusions (CTOs) percutaneous revascularization, however, great concerns still remain regarding the rate of restenosis and reocclusion in comparison with nonocclusive lesions. To evaluate angiographic and clinical outcomes after sirolimus-eluting stent (SES) implantation in the setting of a "real world" series of complex CTOs. From January 2006 to December 2008, 172 consecutive patients with 179 CTO lesions were enrolled into registry. Among these, successful recanalization was obtained in 144 lesions (80.4%) with exclusive SES implantation in 104 lesions. The 9-12 months angiographic follow-up was executed in 85.5% of lesions with evidence of angiographic binary restenosis in 16.8% of lesions. Total stent length and number of stent implanted were recognized as independent predictors of restenosis (odds ratio [OR] 4.7, 95% confidence interval [CI] 1.28-107.09, P = 0.02) and (OR 5.8, 95% CI 1.39-23.55, P = 0.01), respectively.The 2-year clinical follow-up showed rates of target lesion revascularization, non-Q wave myocardial infarction, and total major adverse cardiovascular events (MACEs) of 11.1%, 2%, and 13.1%, respectively. Cox proportional-hazard analysis showed diabetes as independent predictor of MACEs (hazard ratio [HR] 4.832; 95% CI, 0.730-0.861; P = 0.028). Data from this registry demonstrate the long-term efficacy and safety of SES implantation after complex CTOs recanalization. ©2011, Wiley Periodicals, Inc.

Direct traumatic carotid cavernous fistula: angiographic classification and treatment strategies. Study of 172 cases.

Science.gov (United States)

Chi, Cuong Tran; Nguyen, Dang; Duc, Vo Tan; Chau, Huynh Hong; Son, Vo Tan

2014-01-01

We report our experience in treatment of traumatic direct carotid cavernous fistula (CCF) via endovascular intervention. We hereof recommend an additional classification system for type A CCF and suggest respective treatment strategies. Only type A CCF patients (Barrow's classification) would be recruited for the study. Based on the angiographic characteristics of the CCF, we classified type A CCF into three subtypes including small size, medium size and large size fistula depending on whether there was presence of the anterior carotid artery (ACA) and/or middle carotid artery (MCA). Angiograms with opacification of both ACA and MCA were categorized as small size fistula. Angiograms with opacification of either ACA or MCA were categorized as medium size fistula and those without opacification of neither ACA nor MCA were classified as large size fiatula. After the confirm angiogram, endovascular embolization would be performed impromptu using detachable balloon, coils or both. All cases were followed up for complication and effect after the embolization. A total of 172 direct traumatic CCF patients were enrolled. The small size fistula was accountant for 12.8% (22 cases), medium size 35.5% (61 cases) and large size fistula accountant for 51.7% (89 cases). The successful rate of fistula occlusion under endovascular embolization was 94% with preservation of the carotid artery in 70%. For the treatment of each subtype, a total of 21/22 cases of the small size fistulas were successfully treated using coils alone. The other single case of small fistula was defaulted. Most of the medium and large size fistulas were cured using detachable balloons. When the fistula sealing could not be obtained using detachable balloon, coils were added to affirm the embolization of the cavernous sinus via venous access. There were about 2.9% of patient experienced direct carotid artery puncture and 0.6% puncture after carotid artery cut-down exposure. About 30% of cases experienced

Cerebral Angiographic Findings of Cosmetic Facial Filler-related Ophthalmic and Retinal Artery Occlusion.

Science.gov (United States)

Kim, Yong-Kyu; Jung, Cheolkyu; Woo, Se Joon; Park, Kyu Hyung

2015-12-01

Cosmetic facial filler-related ophthalmic artery occlusion is rare but is a devastating complication, while the exact pathophysiology is still elusive. Cerebral angiography provides more detailed information on blood flow of ophthalmic artery as well as surrounding orbital area which cannot be covered by fundus fluorescein angiography. This study aimed to evaluate cerebral angiographic features of cosmetic facial filler-related ophthalmic artery occlusion patients. We retrospectively reviewed cerebral angiography of 7 patients (4 hyaluronic acid [HA] and 3 autologous fat-injected cases) showing ophthalmic artery and its branches occlusion after cosmetic facial filler injections, and underwent intra-arterial thrombolysis. On selective ophthalmic artery angiograms, all fat-injected patients showed a large filling defect on the proximal ophthalmic artery, whereas the HA-injected patients showed occlusion of the distal branches of the ophthalmic artery. Three HA-injected patients revealed diminished distal runoff of the internal maxillary and facial arteries, which clinically corresponded with skin necrosis. However, all fat-injected patients and one HA-injected patient who were immediately treated with subcutaneous hyaluronidase injection showed preserved distal runoff of the internal maxillary and facial arteries and mild skin problems. The size difference between injected materials seems to be associated with different angiographic findings. Autologous fat is more prone to obstruct proximal part of ophthalmic artery, whereas HA obstructs distal branches. In addition, hydrophilic and volume-expansion property of HA might exacerbate blood flow on injected area, which is also related to skin necrosis. Intra-arterial thrombolysis has a limited role in reconstituting blood flow or regaining vision in cosmetic facial filler-associated ophthalmic artery occlusions.

Cognitive deficits after aneurysmal and angiographically negative subarachnoid hemorrhage : Memory, attention, executive functioning, and emotion recognition

NARCIS (Netherlands)

Buunk, Anne M; Groen, Rob J M; Veenstra, Wencke S; Metzemaekers, Joannes; van der Hoeven, Johannes H; van Dijk, J Marc C; Spikman, Jacoba M

2016-01-01

OBJECTIVE: The authors' aim was to investigate cognitive outcome in patients with aneurysmal and angiographically negative subarachnoid hemorrhage (aSAH and anSAH), by comparing them to healthy controls and to each other. Besides investigating cognitive functions as memory and attention, they

Correlation of C-Reactive Protein and Cardiac Enzymes with Angiographic Severity of Coronary Artery Disease in Pakistani Patients with Acute Coronary Syndrome

International Nuclear Information System (INIS)

Saleem, A.; Ali, A.

2017-01-01

Objective: To determine the correlation of C-reactive protein (CRP) levels with the severity of coronary stenosis on angiography and the association of cardiac enzymes with the degree of stenosis in acute coronary syndrome (ACS) patients. Secondly, to compare association of angiographic severity of vascular stenosis with CRP in patients with ST segment elevation myocardial infarction (STEMI) and non-STEMI / Unstable angina (UA). Study Design: Prospective, descriptive study. Place and Duration of Study: Khan Research Laboratories (KRL) Hospital, from October 2014 to March 2015. Methodology: CRP was measured on diagnosis of ACS in 70 patients. Cardiac enzymes were measured 6 hours after the onset of chest pain. Angiographic scoring for degree of stenosis and number of culprit vessels was done. Two groups consisting of patients with STEMI (group 1) and with NSTEMI/UA (group 2) were made. Results: No correlation was found between CRP levels and angiographic stenosis in patients with ACS (r=0.162, p>0.05). No association was found between eosinophil count and severity of stenosis (p=0.88). Rise of cardiac enzymes and degree of coronary stenosis showed a positive correlation (p <0.001). There was significant difference in the means of coronary artery stenosis scores between the two groups (Gensini score of groups 1 and 2: 35.9 +- 4 and 14 +- 8, respectively) p<0.001, but there was no significant difference in CRP levels. Conclusion: CRP is a marker of inflammation in ACS rather than a risk factor for determining the severity of vascular stenosis. Rise in cardiac enzymes still grade high in predicting severity of vascular stenosis than eosinophil count or CRP levels. (author)

A spontaneous pre-anastomotic occlusion does not necessarily impair forearm native dialysis fistulas: echo-Doppler, 3D MR angiographic and digital subtraction angiographic imaging.

Science.gov (United States)

Verbeeck, N; Pillet, J C; Prospert, E; McLntyre, D; Lamy, S

2013-01-01

Renal transplantation is the choice treatment of end-stage renal disease. When it is not indicated or not immediately feasible, hemodialysis must be performed, preferably via a native arteriovenous fistula in the forearm. A pre-anastomotic occlusion of this type of fistula is often accompanied by a thrombosis of its draining vein. In some instances, the venous segment may remain permeable thanks to the development of arterial collateral pathways and may even allow efficient dialysis without any clinical syndrome of distal steal. We present the echo-Doppler, magnetic and angiographic characteristics of three of these collateralized shunts that have remained functional, in one of the cases following a percutaneous dilation.

Dipyridamole-induced ST segment depression during thallium-201 imaging in patients with coronary artery disease: angiographic and hemodynamic determinants

International Nuclear Information System (INIS)

Chambers, C.E.; Brown, K.A.

1988-01-01

To examine the angiographic and hemodynamic determinants of dipyridamole-induced ST segment depression in patients with coronary artery disease, 41 patients with angiographically documented coronary disease who underwent dipyridamole-thallium-201 myocardial scintigraphy were studied. Dipyridamole-induced ST depression occurred in 14 (34%) of the 41 patients. Stepwise multivariate logistic regression was performed to compare the predictive value of angiographic findings (good coronary collateral vessels, jeopardized collateral vessels, multivessel disease), hemodynamic changes (changes in heart rate, systolic pressure, diastolic pressure and rate-pressure product), thallium-201 results (perfusion defect, thallium-201 redistribution) and demographic data (age, gender, medications). Only the presence of good coronary collateral vessels (p less than 0.02) and increases in rate-pressure product after dipyridamole infusion (p less than 0.02) were significant multivariate predictors of dipyridamole-induced ST depression. Good collateral vessels were more common in the group with ST depression (11 [79%] of 14) than they were in the group without ST depression (6 [22%] of 27; p less than 0.001). Rate-pressure product increased 2,835 +/- 1,648 beats/min.mm Hg in the group with ST depression compared with 1,179 +/- 1,417 beats/min.mm Hg in patients without ST depression (p less than 0.005). In conclusion, dipyridamole-induced ST segment depression in patients with coronary artery disease appears to be related to 1) the presence of good coronary collateral vessels, which may act by facilitating coronary steal, and 2) increases in rate-pressure product, reflecting increased myocardial oxygen demand. These observations may explain the lack of prognostic value of dipyridamole-induced ST segment depression described in previous reports

Bronchial and non-bronchial systemic arteries: value of multidetector CT angiography in diagnosis and angiographic embolisation feasibility analysis.

Science.gov (United States)

Lin, Yuning; Chen, Ziqian; Yang, Xizhang; Zhong, Qun; Zhang, Hongwen; Yang, Li; Xu, Shangwen; Li, Hui

2013-12-01

The aim of this study is to evaluate the diagnostic performance of multidetector CT angiography (CTA) in depicting bronchial and non-bronchial systemic arteries in patients with haemoptysis and to assess whether this modality helps determine the feasibility of angiographic embolisation. Fifty-two patients with haemoptysis between January 2010 and July 2011 underwent both preoperative multidetector CTA and digital subtraction angiography (DSA) imaging. Diagnostic performance of CTA in depicting arteries causing haemoptysis was assessed on a per-patient and a per-artery basis. The feasibility of the endovascular treatment evaluated by CTA was analysed. Sensitivity, specificity, and positive and negative predictive values for those analyses were determined. Fifty patients were included in the artery-presence-number analysis. In the per-patient analysis, neither CTA (P = 0.25) nor DSA (P = 1.00) showed statistical difference in the detection of arteries causing haemoptysis. The sensitivity, specificity, and positive and negative predictive values were 94%, 100%, 100%, and 40%, respectively, for the presence of pathologic arteries evaluated by CTA, and 98%, 100%, 100%, and 67%, respectively, for DSA. On the per-artery basis, CTA correctly identified 97% (107/110). Fifty-two patients were included in the feasibility analysis. The performance of CTA in predicting the feasibility of angiographic embolisation was not statistically different from the treatment performed (P = 1.00). The sensitivity, specificity, and positive and negative predictive values were 96%, 80%, 98% and 67%, respectively, for CTA. Multidetector CTA is an accurate imaging method in depicting the presence and number of arteries causing haemoptysis. This modality is also useful for determining the feasibility of angiographic embolisation for haemoptysis. © 2013 The Authors. Journal of Medical Imaging and Radiation Oncology © 2013 The Royal Australian and New Zealand College of Radiologists.

Angiographic differentiation of the forms of truncus arteriosis communis and their prognostic significance

International Nuclear Information System (INIS)

Schumacher, G.; Schreiber, R.; Lorenz, H.P.; Sebening, W.; Meisner, H.; Sebening, F.; Buehlmeyer, K.; Deutsches Herzzentrum Muenchen des Freistaates Bayern

1986-01-01

To decisively improve the life expectancy of children having a truncus arteriosus communis, early surgical intervention during the first year is necessary. As a prerequisite for a successful intervention, a precise diagnosis must be made including angiographic differentiation of the form of the truncus arteriosus communis and possible associated cardiovascular malformations must be established; these constitute important operation hazards and can determine the ultimate success of the intervention. (orig.) [de

Angiographic diagnosis of the prehepatic portal hypertension

International Nuclear Information System (INIS)

Carnevali, G.; Brambilla, G.

1981-01-01

After the experience gained in the examination of more than 400 patients with portal hypertension, one can say that thrombosis is a factor not to be neglected. It appeared in 25% of all cases, in 50% of all cases as a cause of liver cirrhosis. The representation of the vena coeliaca mesentenica is essential for a reliable detection of thrombosis. Splenoportography is less frequently applied due to the known contraindications and is restricted to more demanding and complex problems. The detection of thrombotic changes is also important because such areas prohibit surgical measures such as by-passes. Also important is the preventive discovery of a portal thrombosis in the course of a complicated, bleeding liver cirrhosis. A pre-operative angiographic diagnosis is necessary in planned portocaval shunt procedures of cirrholic liver alterations. The surgeon has to know beforehand whether pyle thrombosis can be excluded or detected. In the latter case, a thrombotectomy has to be performed, which, however, does not impede good treatment results. (orig./MG) [de

Angiographic diagnosis of the prehepatic portal hypertension

Energy Technology Data Exchange (ETDEWEB)

Carnevali, G; Brambilla, G

1981-01-01

After the experience gained in the examination of more than 400 patients with portal hypertension, one can say that thrombosis is a factor not to be neglected. It appeared in 25% of all cases and in 50% of all cases as a cause of liver cirrhosis. The representation of the vena coeliaca mesentenica is essential for a reliable detection of thrombosis. Splenoportography is less frequently applied due to the known contraindications and is restricted to more demanding and complex problems. The detection of thrombotic changes is also important because such areas prohibit surgical measures such as by-passes. Also important is the preventive discovery of a portal thrombosis in the course of a complicated, bleeding liver cirrhosis. A pre-operative angiographic diagnosis is necessary in planned portocaval shunt procedures of cirrholic liver alterations. The surgeon has to know beforehand whether pyle thrombosis can be excluded or detected. In the latter case, a thrombotectomy has to be performed, which, however, does not impede good treatment results.

The angiographic demonstration of hepatic vein obstruction

International Nuclear Information System (INIS)

Zu Maoheng; Xu Hao; Li Guojun; Gu Yuming; Wei Ning; Wang Cheng; Xu Wei

2004-01-01

Objective: To evaluate the angiographic feature of hepatic vein obstruction. Methods Forty-five patients (male 23, female 22, age 9-54 years) suffered from hepatic vein obstruction. The inferior vena cavography and the hepatic venography were performed in all cases. Results: IVC was free in 37 patients with hepatic vein obstruction, both IVC and HV were obstructed in 8 patients. The local or long stenosis of IVC was found in 31 inferior vena cavography. The diameter of IVC was normal in 12 patients. The sign of membranous dome was found in hepatic vein orifice in 5 cases and in accessory hepatic vein orifice in 4 cases. Intrahepatic venous collaterals were found in 45 cases. Conclusion: Hepatic vein obstruction can be reproached primarily in inferior vena cavography, the membranous dome is a direct sign of membranous obstruction of HV and AHV in inferior vena cavography. The selected hepatic venography can provide reliable evidence to diagnose hepatic vein obstruction

Economic evaluation of angiographic interventions including a whole-radiology in- and outpatient care; Wirtschaftliche Evaluation angiographischer Interventionen einschliesslich einer radiologischen stationaeren und ambulanten Patientenbetreuung

Energy Technology Data Exchange (ETDEWEB)

Nolte-Ernsting, C.; Abel, K.; Krupski, G.; Lorenzen, J.; Adam, G. [Klinik und Poliklinik fuer Diagnostische und Interventionelle Radiologie, Universitaetsklinikum Hamburg-Eppendorf (Germany)

2006-01-01

Purpose: To determine the economic efficiency of a whole-radiology in- and outpatient treatment with angiographic interventions performed as the main or sole therapy. Materials and Methods: The calculations represent the data of a university radiology department, including the following angiographic interventions (neuroradiology not considered): Vascular intervention (PTA, stent implantation) of kidneys and extremities, recanalization of hemodialysis access, chemoembolization, diagnostic arterioportal liver CT, port implantation, varicocele embolization, PTCD, percutaneous implantation of biliary stent. First, the different angiographic interventions are categorized with reference to the German DRG system 2005. Considering the example of a university hospital, the individual cost of each intervention is calculated and correlated with reimbursements by G-DRG2005 and so-called ''ambulant operation'' (EBM200plus). With these data, profits and losses are calculated for both in- and outpatient care. Results: Radiologic interventions of inpatients yield a profit in the majority of cases. With a base rate of 2900 Euro, the profits in our university hospital range between -872 Euro and +3411 Euro (mean: +1348 Euro). On the other hand, those angiographic interventions suitable for ''ambulant operation'' generate average profits of +372 Euro, if only direct costs are considered. The data of outpatient radiological interventions average between 381 Euro up to 1612 Euro lower than compared with profits obtained from in patient care. (orig.)

Angiographic Characteristics of Symptomatic Recurrent Disease After Infrainguinal Percutaneous Transluminal Angioplasty

International Nuclear Information System (INIS)

Soeder, Heini K.; Manninen, Hannu I.; Matsi, Pekka J.

1999-01-01

Purpose: To evaluate the angiographic patterns of clinically manifest recurrent disease after infrainguinal percutaneous transluminal angioplasty (PTA) of stenoses and total occlusions. Methods: Among 326 infrainguinal PTAs on 263 consecutive patients, selective angiography was performed on 61 limbs of 52 patients 1-60 months after the primary intervention because of clinically suspected recurrent disease. Lesion-specific and patient-related factors were analyzed for 75 angiographically confirmed recurrent lesions in 57 limbs of 48 patients. Results: Recurrent disease was more frequently a stenosis when the original target lesion was a stenosis (92%, 44/48) than when the original lesion was a total occlusion (59%, 16/27; p < 0.001). When the original target lesion was a stenosis, the total length of the recurrent disease was longer than that of the original lesion [3.9 ± 3.9 cm (mean ± standard deviation) vs 2.8 ± 2.7 cm; p= 0.03], while in the subgroup of original total occlusions the length of the recurrent lesion was shorter than that of the original occlusion (7.1 ± 5.0 cm vs 9.9 ± 6.9 cm; p0.02). Half the restenoses (22/44) extended beyond one or both ends of the original stenosis and 38% (6/16) of the reocclusions extended beyond the distal end of the original occlusion. Conclusions: The type of recurrent disease depends on the original lesion type and the restenotic lesion frequently extends beyond one or both ends of the original target lesion

A comparison of entrance skin dose delivered by clinical angiographic c-arms using the real-time dosimeter: the MOSkin

International Nuclear Information System (INIS)

Thorpe, Nathan K.; Cutajar, Dean; Lian, Cheryl; Rosenfeld, Anatoly; Pitney, Mark; Friedman, Daniel; Perevertaylo, Vladimir

2016-01-01

Coronary angiography is a procedure used in the diagnosis and intervention of coronary heart disease. The procedure is often considered one of the highest dose diagnostic procedures in clinical use. Despite this, there is minimal use of dosimeters within angiographic catheterisation laboratories due to challenges resulting from their implementation. The aim of this study was to compare entrance dose delivery across locally commissioned c-arms to assess the need for real-time dosimetry solutions during angiographic procedures. The secondary aim of this study was to establish a calibration method for the MOSkin dosimeter that accurately produces entrance dose values from the clinically sampled beam qualities and energies. The MOSkin is a real-time dosimeter used to measure the skin dose delivered by external radiation beams. The suitability of the MOSkin for measurements in the angiographic catheterisation laboratory was assessed. Measurements were performed using a 30 × 30 × 30cm 3 PMMA phantom positioned at the rotational isocenter of the c-arm gantry. The MOSkin calibration factor was established through comparison of the MOSkin response to EBT2 film response. Irradiation of the dosimeters was performed using several clinical beam qualities ranging in energy from 70 to 105 kVp. A total of four different interventional c-arm machines were surveyed and compared using the MOSkin dosimeter. The phantom was irradiated from a normal angle of incidence using clinically relevant protocols, field sizes and source to image detector distance values. The MOSkin was observed to be radiotranslucent to the c-arm beam in all clinical environments. The MOSkin response was reproducible to within 2 % of the average value across repeated measurements for each beam setting. There were large variations in entrance dose delivery to the phantom between the different c-arm machines with the highest observed cine-acquisition entrance dose rate measuring 326 % higher than the lowest

Relationship of myocardial hibernation, scar, and angiographic collateral flow in ischemic cardiomyopathy with coronary chronic total occlusion.

Science.gov (United States)

Wang, Li; Lu, Min-Jie; Feng, Lei; Wang, Juan; Fang, Wei; He, Zuo-Xiang; Dou, Ke-Fei; Zhao, Shi-Hua; Yang, Min-Fu

2018-03-07

The relationship between myocardial viability and angiographic collateral flow is not fully elucidated in ischemic cardiomyopathy (ICM) with coronary artery chronic total occlusion (CTO). We aimed to clarify the relationship between myocardial hibernation, myocardial scar, and angiographic collateral flow in these patients. Seventy-one consecutive ICM patients with 122 CTOs and 652 dysfunctional segments within CTO territories were retrospectively analyzed. Myocardial hibernation (perfusion-metabolism mismatch) and the extent of 18 F-fluorodeoxyglucose (FDG) abnormalities were assessed using 99m Tc-sestamibi and 18 F-FDG imaging. Myocardial scar was evaluated by late gadolinium enhancement (LGE) cardiac magnetic resonance (CMR) imaging. Collateral flow observed on coronary angiography was assessed using Rentrop classification. In these patients, neither the extent nor frequency of myocardial hibernation or scar was related to the status of collateral flow. Moreover, the matching rate in determining myocardial viability was poor between any 2 imaging indices. The extent of 18 F-FDG abnormalities was linearly related to the extent of LGE rather than myocardial hibernation. Of note, nearly one-third (30.4%) of segments with transmural scar still had hibernating tissue. Hibernation and non-transmural scar had higher sensitivity (63.0% and 66.7%) than collateral flow (37.0%) in predicting global functional improvement. Angiographic collateral cannot accurately predict myocardial viability, and has lower sensitivity in prediction of functional improvement in CTO territories in ICM patients. Hence, assessment of myocardial viability with non-invasive imaging modalities is of importance. Moreover, due to the lack of correlation between myocardial hibernation and scar, these two indices are complementary but not interchangeable.

Impact of lesion morphology on angiographic and clinical outcomes in patients with chronic total occlusion after recanalization with drug-eluting stents: a multislice computed tomography study

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Ito, Tsuyoshi [Toyohashi Heart Center, Toyohashi (Japan); Nagoya City University Graduate School of Medical Sciences, Department of Cardio-Renal Medicine and Hypertension, Nagoya (Japan); Tsuchikane, Etsuo; Nasu, Kenya; Kimura, Masashi; Terashima, Mitsuyasu; Kinoshita, Yoshihisa; Habara, Maoto; Suzuki, Takahiko [Toyohashi Heart Center, Toyohashi (Japan); Suzuki, Yoriyasu; Ehara, Mariko [Nagoya Heart Center, Nagoya (Japan); Ohte, Nobuyuki [Nagoya City University Graduate School of Medical Sciences, Department of Cardio-Renal Medicine and Hypertension, Nagoya (Japan)

2015-10-15

The aim of this study was to investigate the multislice computed tomography (MSCT) parameters associated with adverse outcomes after chronic total occlusion percutaneous coronary intervention (CTO-PCI) with drug-eluting stents. A total of 285 patients who underwent MSCT before CTO-PCI were analyzed. Lesion morphology was assessed with MSCT. Angiographic restenosis, reocclusion, and MACE (a composite of cardiac death, myocardial infarction, stent thrombosis, and target lesion revascularization) were analyzed. MACE was observed in 36 patients (13.6 %). Occlusion length was greater (39.5 ± 19.9 mm vs. 22.3 ± 13.7 mm, p < 0.01), minimal vessel area smaller (11.2 ± 5.7 mm{sup 2} vs. 14.5 ± 5.6 mm{sup 2}, p < 0.01), and severe calcification more common (36 % vs. 12 %, p < 0.01) in the MACE group compared to the non-MACE group. We defined occluded length >25.4 mm, minimal vessel area <11.9 mm{sup 2}, which were identified by receiver operating characteristic analysis, and severe calcification as CT-derived risk factors. Angiographic restenosis (60 % vs. 12 % vs. 7 %, p < 0.01), reocclusion (29 % vs. 2 % vs. 2 %, p < 0.01), and MACE (43 % vs. 6 % vs. 3 %, p < 0.01) were more common in patients with 2 or more risk factors than in those with 1 or 0. MSCT characteristics associated with adverse outcomes after CTO-PCI were occlusion length, minimal vessel area, and severe calcification. (orig.)

Unilateral renal agenesia in the angiographic material and renovascular hypertension

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Stojanov, D.; Lovasic, I.; Dujmovic, M.; Bobinac, D.

1987-06-01

Analysis of 1216 abdominal aortographies and selective renovasographies undertaken at the Institute of Radiology, Clinical Hospital Centre Rijeka during the period 1979-1985, was performed. 39 (3,2%) unilateral renal agenesias were established, a percentage that is significantly higher than reported by other authors. Analysis of all angiographic parameters of a single kidney was also worked out. A significanlty high percentage (66,7%) of hypertension was diagnosed in this group. Congenital renal failures make their appearance in the early embryological development and are discovered, if compatible with life, most frequently at an advanced age. Statistical data on the frequency during a lifetime are less reliable because a great number of anomalies are never discovered during a person's life. The etiology of variations and congenital failure of renal arteries is unknown in 90% of the cases, and most of the malformations are without characteristic symptomatology. Since the anatomic relations in anomalous kidney are disturbed, the sign of the disease can develop atypical forms causing frequent errors in diagnosis. The kidney is supplied by numerous lateral branches of the medial sacral artery, i.e. the aorta, during embryological development. Later, some of them degenerate or mutually connect themselves, and the definitive kidney has been usually penetrated by only one artery and one vein on the same side (1). If this is not so, i.e. when the obliterations of caudal metanephogenic arteries are only partially present, then the renal arteries emerge from the iliac or lumbar arteries (2,3). Bilateral renal agenesia is extreme and incompatible with life, and hence of small clinical importance. Unilateral agenesia makes its appearance according to various statistics and authors from the obductional materials in ratio 1:1000 (4,5), clinical ones 1:5000 (6, 7, 8) and the angiographically 1:76(9), more exactly 1:35 cases (10).

Unilateral renal agenesia in the angiographic material and renovascular hypertension

International Nuclear Information System (INIS)

Stojanov, D.; Lovasic, I.; Dujmovic, M.; Bobinac, D.

1987-01-01

Analysis of 1216 abdominal aortographies and selective renovasographies undertaken at the Institute of Radiology, Clinical Hospital Centre Rijeka during the period 1979-1985, was performed. 39 (3,2%) unilateral renal agenesias were established, a percentage that is significantly higher than reported by other authors. Analysis of all angiographic parameters of a single kidney was also worked out. A significanlty high percentage (66,7%) of hypertension was diagnosed in this group. Congenital renal failures make their appearance in the early embryological development and are discovered, if compatible with life, most frequently at an advanced age. Statistical data on the frequency during a lifetime are less reliable because a great number of anomalies are never discovered during a person's life. The etiology of variations and congenital failure of renal arteries is unknown in 90% of the cases, and most of the malformations are without characteristic symptomatology. Since the anatomic relations in anomalous kidney are disturbed, the sign of the disease can develop atypical forms causing frequent errors in diagnosis. The kidney is supplied by numerous lateral branches of the medial sacral artery, i.e. the aorta, during embryological development. Later, some of them degenerate or mutually connect themselves, and the definitive kidney has been usually penetrated by only one artery and one vein on the same side (1). If this is not so, i.e. when the obliterations of caudal metanephogenic arteries are only partially present, then the renal arteries emerge from the iliac or lumbar arteries (2,3). Bilateral renal agenesia is extreme and incompatible with life, and hence of small clinical importance. Unilateral agenesia makes its appearance according to various statistics and authors from the obductional materials in ratio 1:1000 (4,5), clinical ones 1:5000 (6, 7, 8) and the angiographically 1:76(9), more exactly 1:35 cases (10). (orig.)

Pattern not volume of bleeding predicts angiographic vasospasm in nonaneurysmal subarachnoid hemorrhage.

Science.gov (United States)

Raya, Amanda; Zipfel, Gregory J; Diringer, Michael N; Dacey, Ralph G; Derdeyn, Colin P; Rich, Keith M; Chicoine, Michael R; Dhar, Rajat

2014-01-01

Spontaneous idiopathic subarachnoid hemorrhage (SAH) with a perimesencephalic bleeding pattern is usually associated with a benign course, whereas a diffuse bleeding pattern has been associated with a higher risk of vasospasm and disability. We evaluated whether volume of bleeding explains this disparity. Pattern and amount of bleeding (by Hijdra and intraventricular hemorrhage scores) were assessed in 89 patients with nonaneurysmal SAH. Outcomes included angiographic vasospasm, delayed cerebral ischemia, and functional outcome at 1 year. Diffuse bleeding was associated with significantly higher Hijdra and intraventricular hemorrhage scores than perimesencephalic SAH, P≤0.003. Angiographic vasospasm was more likely in diffuse versus perimesencephalic SAH (45% versus 27%; odds ratio, 2.9; P=0.08), but adjustment for greater blood burden only partially attenuated this trend (adjusted odds ratio, 2.2; 95% confidence interval, 0.69-7.2; P=0.18); delayed cerebral ischemia was only seen in those with diffuse bleeding. Patients with diffuse bleeding were less likely to be discharged home (68% versus 90%; P=0.01) and tended to have more residual disability (modified Rankin scale, 3-6; 20% versus 6%; P=0.18). Nonaneurysmal SAH can still result in vasospasm and residual disability, especially in those with diffuse bleeding. This disparity is only partially accounted for by greater cisternal or intraventricular blood, suggesting that the mechanism and distribution of bleeding may be as important as the amount of hemorrhage in patients with idiopathic SAH.

Intracranial infective aneurysms presenting with haemorrhage: An analysis of angiographic findings, management and outcome

International Nuclear Information System (INIS)

Venkatesh, Sudhakar K.; Phadke, Rajendra V.; Kalode, Ravi R.; Kumar, Sunil; Jain, Vijendra K.

2000-01-01

AIM: This study is an analysis of angiographic findings in 17 patients with infective aneurysms who presented with intracranial haemorrhage and reviews the management and outcome in the context of the existing literature. MATERIALS AND METHODS: A retrospective study of infective aneurysms in 17 patients was carried out. Cranial angiography was performed in all patients. The location, size and outline of aneurysms were analysed. Ten patients were managed conservatively and six patients underwent surgery for the ruptured infective aneurysms and were followed up for a period of 35.8 months and 23 months, respectively. RESULTS: Twenty-two aneurysms were identified (five unruptured) in 17 patients. Twenty aneurysms (90.9%) were distal in location and two (9.1%) proximal. Sixty percent were in the posterior circulation with 55% in the posterior cerebral artery (PCA) territory, 27.3% in the middle cerebral artery (MCA) territory and 9.1% in the anterior cerebral artery (ACA) territory. Fourteen aneurysms were small (3-5 mm) and eight were medium sized (6-9 mm). 72.7% of aneurysms had irregular outline and 27.3% regular outline. Out of the 10 ruptured aneurysms managed conservatively, eight resolved. One patient died, presumably due to rebleed, and one had infarction due to parent vessel thrombosis. Six aneurysms were surgically managed with good results. Of the five unruptured aneurysms one was surgically managed and the remaining four conservatively managed patients did not bleed during follow-up. CONCLUSION: Patients with ruptured infective aneurysms fared well with medical management and the outcome in this series is better than that reported in literature. Patients on conservative management, however, need closer monitoring with angiographic follow-up. Active management is required with enlarging or persisting aneurysms. Venkatesh, S.K. (2000)

Quantitative angiographic anatomy of the renal arteries and adjacent aorta in the swine for preclinical studies of intravascular catheterization devices.

Science.gov (United States)

Sakaoka, Atsushi; Koshimizu, Masafumi; Nakamura, Shintaro; Matsumura, Kiyoshi

2018-05-10

Swine are the most common animal model in preclinical studies of cardiovascular devices. Because of the recent trend for development of new devices for percutaneous catheterization, especially for the renal arteries (RAs), we examined the quantitative anatomical dimensions of the RAs and adjacent aorta in swine. Angiographic images were analyzed in 66 female Yorkshire/Landrace crossbred swine. The diameter of both the right and left main RA was 5.4 ± 0.6 mm. The length of the right main RA was significantly longer than that of the left (29.8 ± 7.5 mm vs. 20.6 ± 5.4 mm, respectively; Pswine are an appropriate animal model for assessing the safety of, and determining optimal design of, catheter devices for RAs in simulated clinical use. However, there were species differences in the branching angle and adjacent aorta diameter, suggesting that swine models alone are inadequate to assess the delivery performance of catheter devices for RAs.

MR imaging findings of high-voltage electrical burns in the upper extremities: correlation with angiographic findings

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Lee, Gyung Kyu; Kang, Ik Won; Hwang, Dae Hyun; Min, Seon Jung; Han, You Mi (Dept. of Radiology, Hallym Univ. College of Medicine, Hangang Sacred Heart Hospital, Seoul (Korea, Republic of)); Suh, Kyung Jin (Dept. of Radiology, Dongguk Univ. College of Medicine, Gyeongju Hospital, Gyeongju (Korea, Republic of)), email: kyungjin.suh@gmail.com; Choi, Min Ho (Dept. of Internal Medicine, Hallym Univ. College of Medicine, Hangang Sacred Heart Hospital, Seoul (Korea, Republic of))

2011-02-15

Background: A high-voltage electrical burn is often associated with deep muscle injuries. Hidden, undetected deep muscle injuries have a tendency for progressive tissue necrosis, and this can lead to major amputations or sepsis. MRI has excellent soft tissue contrast and it may aid in differentiating the areas of viable deep muscle from the areas of non-viable deep muscle. Purpose: To describe the MR imaging findings of a high-voltage electrical burn in the upper extremity with emphasis on the usefulness of the gadolinium-enhanced MRI and to compare the MR imaging findings with angiography. Material and Methods: We retrospectively reviewed the imaging studies of six patients with high-voltage electrical burns who underwent both MRI and angiography at the burn center of our hospital from January 2005 to December 2009. The imaging features were evaluated for the involved locations, the MR signal intensity of the affected muscles, the MR enhancement pattern, the involved arteries and the angiographic findings (classified as normal, sluggish flow, stenosis or occlusion) of the angiography of the upper extremity. We assessed the relationship between the MR imaging findings and the angiographic findings. Results: The signal intensities of affected muscles were isointense or of slightly high signal intensity as compared with the adjacent unaffected skeletal muscle on the T1-weighted MR images. Affected muscles showed heterogenous high signal intensity relative to the adjacent unaffected skeletal muscle on the T2- weighted images. The gadolinium-enhanced T1-weighted images showed diffuse inhomogeneous enhancement or peripheral rim enhancement of the affected muscles. The angiographic findings of the arterial injuries showed complete occlusion in three patients, severe stenosis in two patients and sluggish flow in one patient. Of these, the five patients with complete occlusion or severe stenosis on angiography showed non-perfused and non-viable areas of edematous muscle on

[Multidisciplinary protocol for computed tomography imaging and angiographic embolization of splenic injury due to trauma: assessment of pre-protocol and post-protocol outcomes].

Science.gov (United States)

Koo, M; Sabaté, A; Magalló, P; García, M A; Domínguez, J; de Lama, M E; López, S

2011-11-01

To assess conservative treatment of splenic injury due to trauma, following a protocol for computed tomography (CT) and angiographic embolization. To quantify the predictive value of CT for detecting bleeding and need for embolization. The care protocol developed by the multidisciplinary team consisted of angiography with embolization of lesions revealed by contrast extravasation under CT as well as embolization of grade III-V injuries observed, or grade I-II injuries causing hemodynamic instability and/or need for blood transfusion. We collected data on demographic variables, injury severity score (ISS), angiographic findings, and injuries revealed by CT. Pre-protocol and post-protocol outcomes were compared. The sensitivity and specificity of CT findings were calculated for all patients who required angiographic embolization. Forty-four and 30 angiographies were performed in the pre- and post-protocol periods, respectively. The mean (SD) ISSs in the two periods were 25 (11) and 26 (12), respectively. A total of 24 (54%) embolizations were performed in the pre-protocol period and 28 (98%) after implementation of the protocol. Two and 7 embolizations involved the spleen in the 2 periods, respectively; abdominal laparotomies numbered 32 and 25, respectively, and 10 (31%) vs 4 (16%) splenectomies were performed. The specificity and sensitivity values for contrast extravasation found on CT and followed by embolization were 77.7% and 79.5%. The implementation of this multidisciplinary protocol using CT imaging and angiographic embolization led to a decrease in the number of splenectomies. The protocol allows us to take a more conservative treatment approach.

Intravascular ultrasound-guided optimized stent deployment. Immediate and 6 months clinical and angiographic results from the Multicenter Ultrasound Stenting in Coronaries Study (MUSIC Study)

Science.gov (United States)

de Jaegere, P; Mudra, H; Figulla, H; Almagor, Y; Doucet, S; Penn, I; Colombo, A; Hamm, C; Bartorelli, A; Rothman, M; Nobuyoshi, M; Yamaguchi, T; Voudris, V; DiMario, C; Makovski, S; Hausmann, D; Rowe, S; Rabinovich, S; Sunamura, M; van Es, G A

1998-08-01

.3%. When the two patients with documented stent thrombosis are included, the restenosis rate amounts to 97%. These data confirm that, in selected patients, stents can safely be implanted without the use of systemic anticoagulation, provided optimal stent expansion is achieved. The exact role of intravascular ultrasound in the achievement of these results needs to be established by appropriately designed studies. In the meantime, intravascular ultrasound coupled with the Palmaz-Schatz stent incorporating a spiral bridge, may have contributed considerably to the immediate angiographic outcome, which in turn may explain the favourable clinical and angiographic outcome at 6 months.

Evaluation of indicator dilution process in X-ray angiographic images deteriorated by factors of technical origin

International Nuclear Information System (INIS)

Dernalowicz, J.; Goszczynska, H.; Mazur, P.

1996-01-01

Different sources of error in X-rays angiographic images have been discussed. Some kind of error which considerably influences densitometric analysis of time sequences of images - the fluctuation of image intensity during coronarography screening - has been emphasized and discussed in details. Three practical solutions of how to correct (compensate) such error have been proposed and described. (author)

Unsatisfactory hepatic perfusion after placement of the infusaid pump: Angiographic correlation

International Nuclear Information System (INIS)

Andrews, J.C.; Williams, D.M.; Cho, K.J.; Knol, J.A.; Wahl, R.L.; Ensminger, W.D.

1988-01-01

Complete perfusion limited to the liver is essential to the success of regional chemotherapy for hepatic malignancy. Thirty-three patients with unsatisfactory hepatic artery perfusion scintigrams after surgical placement of a pump and catheter system were evaluated with selective angiography (31 cases) or digital subtraction angiography (DSA) via the pump side port (six cases). The cause of the perfusion defect was hepatic artery thrombosis (14 cases), extrahepatic flow through collaterals (13 cases), misplaced catheter (three cases), short proper hepatic artery without adequate length for mixing (two cases), and undefined (one case). DSA findings were diagnostic in only two cases. Angiographic findings directed attempted correction in 22 of 33 cases

Angiographic examinations of the circulatory development of living chick embryos

International Nuclear Information System (INIS)

Stoeter, P.; Buchhoecker, M.; Bruzek, W.; Drews, U.; Schulze, K.; Tuebingen Univ.; Tuebingen Univ.

1980-01-01

In chick embryos of an age of incubation of 5-14 days, the physiological development of the circulation and the morphological differentation of the arterical system were studied by intravital and postmortal angiography. For the examinations of the living embryos, a special radiographic and injection technique had to be developed. The contrast medium was injected into the umbilical veins and transported by the actions of the embryonic heart. Continuous ECG recordings showed no marked interference of the injections with the cardiac activity. According to the angiographic findings, the circulation is relatively fast within the main arteries, but the capillary perfusion is prolonged and lasts up to several minutes. The average circulatory velocity of the blood stream within the carotid artery increases parallel to the arterial enlargement, whereas the circulatory time decreases and the number of heart beats during the period of carotid opacification does not change to a great extent. By this, a steady transport of gas and nutritional material may be achieved in the growing arterial system. (orig.) [de

The availability of appropriately fitting personal protective aprons and jackets for angiographic and interventional radiology personnel

International Nuclear Information System (INIS)

Cremen, S.A.; McNulty, J.P.

2014-01-01

Purpose: This study explored the availability of personal protective equipment, lead or lead-free aprons or jackets, in angiographic and interventional radiology suites in the Republic of Ireland with a focus on the sizes available, appropriateness of fit and purchasing practices. Methods: All centres providing an angiographic or interventional radiology service in the Republic of Ireland were invited to participate with data being collected by means of a postal questionnaire exploring the above issues. Results: The mean number of aprons or jackets available across the centres who responded to the survey was 18.4 with the majority of these, 72%, being medium or large in size. Clinical specialists in three centres identified that there were insufficient aprons or jackets sized extra small or extra large within their departments and only one centre had a purchasing policy in place where individual staff were assigned a personal apron or jacket. Conclusion: Ill-fitting aprons or jackets will reduce the shielding provided to certain body regions by personal protective equipment. The use of over-sized aprons or jackets by staff is of particular concern based on the potential for inadvertent exposure to tissues where cancers may potentially be induced due to poor armhole fit. It is important to carefully consider purchasing practices and range of personal protective equipment sizes available in order to ensure that all staff receive the greatest possible protection from occupational radiation exposure

The angiographic findings of coronary arterial spasm (a report of 37 cases)

International Nuclear Information System (INIS)

Kuang Jianyi; Chen Jianhun; Du Zhimin; Li Xiangmin; Hu Chengheng

2002-01-01

Objective: The arterial spasm which often seen in the coronary angiography was considered as a result of the pathological spasm of the coronary artery or a complication of catheterization. The coronary arterial spasm is a considerable situation because it increases the danger of stenotic lesions in coronary artery, which should be managed immediately. Methods: In total 37 patients presented with coronary arterial spasm in the coronary angiography (Judkins method): 23 male and 14 female, aged 43-60 years (the 47 years in average). Spasms were relieved in all patients after the administration of glonoin. Results: Solitary spasm were the most common, the angiographic findings were long section (>10 mm) with stenosis of 50%-65% in left anterior descending artery (12 cases), or in the middle and near portion of the right coronary artery (5 cases), where the orifice of the branches were involved; severe stenosis of the orifice of the right coronary artery (3 cases); irregular, mild and local spasm in left anterior descending artery or circumflex (8 cases). And multiple spasm was observed in left anterior descending artery (4 cases) or in the right coronary artery (5 cases). In 19 cases, stenosis accompanying with spasm were revealed and local spasm were observed at the site of arterial sclerosis. Conclusion: The spasm owing to the catheterization doesn't result in chest discomfort and changes in EKG, while pathological spasm occurs in the population with high risk of coronary heart disease, which indicates the potential myocardial infraction. The angiographic findings helps differentiating the two situation

Follow-up study on reading comprehension in Down's syndrome: the role of reading skills and listening comprehension.

Science.gov (United States)

Roch, Maja; Florit, Elena; Levorato, Chiara

2011-01-01

According to the 'Simple View of Reading', reading comprehension requires some abilities such as reading skill and listening comprehension. Individuals with Down's syndrome show relative strengths in reading skills, mainly in word recognition, where they attain a reading age of about 7-8 years. Compared with word recognition, their reading comprehension is usually delayed by at least 6 months. Poor reading comprehension is paralleled by weak listening comprehension. It is claimed that poor listening comprehension might constrain the development of reading comprehension and, therefore, be a cause for the asynchrony between reading skills and reading comprehension. A follow-up study was carried out in order to analyse the improvements in reading skills, listening and reading text comprehension, and to support the hypothesis of a causal relationship between listening and reading comprehension. Ten children and adolescents with Down's syndrome, aged between 11 years 3 months and 19 years 10 months, were assessed twice over a one-year period as to their reading skills, listening and reading text comprehension. Three main findings emerged: (1) reading skills, on the one hand, and comprehension (both listening and reading), on the other hand, are independent; (2) reading comprehension development is determined mainly by listening comprehension, which in the present study proved to be very poor; and (3) an improvement after a one-year period, even though limited, occurred for all examined abilities except for listening comprehension. The results are discussed in the light of the theoretical framework of the 'Simple View of Reading' and of their relevance for practical and educational issues. © 2011 Royal College of Speech & Language Therapists.

Clinical and angiographic evaluation of the topic application of nitrate compounds in obstructive distal arteriopathies of the legs

International Nuclear Information System (INIS)

Perini, L.; Cavallo, A.; Perin, B.; Natale, F.; Borelli, G.; Bisiato, R.

1988-01-01

The vasodilatator effect obtained by the topic use of a nytroglycerin compound (TNG) has been angiographically tested on 11 patients affected by distal arteriopathy of the legs. All patients presented arteriosclerotic vascular lesions; two of them also suffered from diabetic angiopathy. Arteriography of the legs has proved to be a very important tool in the evaluation of the patients'response to the administration of the drug. An hour after 80 mg of TNG had been applied to the skin of the examined leg, arteriography showed a marked dilatation, especially of the muscular arteries and the undamaged tracts of the arteries of the legs. Angiographic evaluation of the functional blood supply thus obtained provides prognostic information and helps in the choice of the subsequent therapy. Furthermore, the clinical efficacy of prolonged treatment with this drug has been tested in 10 out of the 11 patients. They all responded with an immediate and persistent hemodynamic improvement, evaluated according to Fontaine's classification

The subtype of VSD and the angiographic differentiation

International Nuclear Information System (INIS)

Choe, Kyu Ok; Sul, Jun Hee; Lee, Sung Kyu; Cho, Bum Koo; Hong, Sung Nok

1985-01-01

VSD is the most common congenital cardiac malformation and the natural history depends not only on the age of patients and the size of defect but the subtype of VSD as well, important factor in clinical management of those patients. In 110 patients, with surgically repaired VSD in Yonsei Medical Center in 1984, the subtype of VSDs evaluated by surgical observation were correlated with LV angiogram findings to verify the incidence of subtype in Korean and the diagnostic accuracy to predict the subtype by angiogram. 1. 110 patients included 64 boys and 46 girls, the age ranged from 3 months to 14 years (average 4.6 years old). 2. Angiographic findings were interpreted as follows; a. Perimembranous defects were profiled in LAO 60 .deg. LV angiogram and located below the aortic valve. In inlet excavation the shunted blood opacified the recess between septal leaflet of tricuspid valve and interventricular septum in early phase, in infundibular excavation opacified the recess between anterior leaflet of TV and anterior free wall of RV and in trabecular excavation the shunted blood traversed anterior portion of TV ring, opacified trabecular portion of RV cavity. b. Subarterial types were profiled in RAO 30 .deg. LV angiogram, just below aortic valve as well as pulmonic valve. Total infundibular defects were profiled in RAO 30 .deg. and LAO 60 .deg. LV angiogram subaortic in location in both views. c. In muscular VSD the profiled angle was varied according to the subtype but the defects were separated from the aortic valve as muscular septum interposed between the aortic valve and the defect. 3. The incidence of subtype of VSDs evaluated by surgical observation were as follows. Subarterial type : 32 cases (29.1%) Total infundibular defect : 5 cases (4.5%) Perimembranous type : 73 cases (66.3%) Infundibular excavation : 32 cases (29.2%) Trabecular excavation : 28 cases (25.5%) Inlet excavation : 10 cases (9.1%) Mixed : 3 cases (2.7%) Muscular type : 1 cases (0.9%) Total 63

Evaluation of the angiographic findings in pulmonary atresia

International Nuclear Information System (INIS)

Choe, Kyu Ok; Sul, Jun Hee; Lee, Seung Kyu; Cho, Bum Koo; Hong, Pill Whoon

1986-01-01

We studied the angiographic findings in 65 patients with congenital pulmonary atresia, ages 4 days to 14 years (mean 3.3 yrs), from 1981 to 1986 at Severance Hospital Yonsei University. 1. 6 had pulmonary atresia with an intact interventricular septum, 38 had it with cardiac anomaly Renodynamically simulating TOF, and 21 associated with more complicated cardiac anomalies. 2. In the group with an intact ventricular septum, 5 showed confluent intrapericardial pulmonary artery, all segmental pulmonary arteries connected to intrapericardial artery. 3. In the group simulating TOF, aorta arose from RV with or without overriding in 35. In 27 patients with confluent intrapericardial pulmonary artery, 23 had more than 10 segmental pulmonary arteries connected to intrapericardial artery and 5 had severely hypoplastic hilar pulmonary arteries. In 11 with non confluent intrapericardial pulmonary artery, 4 had more than 10 segmental pulmonary arteries connected to central pulmonary artery and 9 had severely hypoplastic hilar pulmonary arteries. 4. In the group associated with more complicated cardiac anomaly, included 8 patients with atrioventricular discordance, 7 with univentricular heart and 6 with tricuspid atresia. In 17 patients with confluent intrapericardial artery, 16 had more than 10 segmental pulmonary arteries connected to intrapericardial artery, one showed severe hypoplasia of hilar pulmonary arteries. In another 4 with non confluence, no one showed more than 10 segmental arteries connected to intrapericardial or hilar pulmonary artery.

Quantitative assessment of angiogenesis in the chick embryo and its chorioallantoic membrane by computerised analysis of angiographic images

International Nuclear Information System (INIS)

Nikiforidis, G.; Papazafiropoulos, D.; Siablis, D.; Karnabatidis, D.; Hatjikondi, O.; Dimopoulos, J.

1999-01-01

We studied, in vivo, the angiogenesis process in the chick embryo and its chorioallantoic membrane (CAM) using digital subtraction angiography (DSA) in conjunction with computer-assisted image analysis. In a series of fertilised eggs, angiography was carried out at days 8, 10, 12 and 14 of embryonic development. The angiographic images were digitised and subsequently processed for a specific image analysis. A set of specific morphological parameters has been defined to allow an analytical characterisation of the vascularity status. Vessels were classified into three categories according to their diameter (50-100, 100-200, and >200 μm). The data were normalised and statistically evaluated. Graphs showing the development of angiogenesis were obtained. Total vascular area revealed a continuous rise, whereas, total vascular length increased until day 12 and then it started decreasing. These morphometric parameters in the first two vessel categories progressively increased throughout the entire period of development, whereas in the third category they increased until day 10 and then they started decreasing. By applying a vascular casting technique CAM vessels were visualised and compared with those extracted from the processed angiographic image. The comparison revealed that there is exact matching for the first two vessel categories (diameters higher than 100 μm) while the matching of the third category (diameters between 50 and 100 μm) is approximate

Pediatric renovascular hypertension in Thailand: CT angiographic findings

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Visrutaratna, Pannee; Srisuwan, Tanop; Sirivanichai, Chusak [Chiang Mai University, Department of Radiology, Faculty of Medicine, Chiang Mai (Thailand)

2009-12-15

Renovascular disease is an uncommon but important cause of hypertension in children. When unrecognized and untreated, renovascular hypertension in children can have serious complications. To review the causes of renovascular hypertension and computed tomography angiographic (CTA) findings in children and adolescents. Twenty-eight CTAs from January 2004 to March 2008 of 23 children and adolescents with hypertension were reviewed for the causes and CTA findings. Nine of the 23 children (39%) had abnormal renal arteries with or without abnormal abdominal aortas. Four of these children had Takayasu arteritis, one had moyamoya disease, and one had median arcuate ligament syndrome. One with chronic pyelonephritis had severe stenosis of the proximal right renal artery. The other two children had renal artery stenosis with a nonspecific cause. One child with a normal abdominal aorta and renal arteries had a right suprarenal mass. On pathological examination a ganglioneuroma was found. CTA can help in diagnosis of renovascular hypertension in children and adolescents. Although CTA is not a screening modality, it is appropriate in some situations. (orig.)

Pediatric renovascular hypertension in Thailand: CT angiographic findings

International Nuclear Information System (INIS)

Visrutaratna, Pannee; Srisuwan, Tanop; Sirivanichai, Chusak

2009-01-01

Renovascular disease is an uncommon but important cause of hypertension in children. When unrecognized and untreated, renovascular hypertension in children can have serious complications. To review the causes of renovascular hypertension and computed tomography angiographic (CTA) findings in children and adolescents. Twenty-eight CTAs from January 2004 to March 2008 of 23 children and adolescents with hypertension were reviewed for the causes and CTA findings. Nine of the 23 children (39%) had abnormal renal arteries with or without abnormal abdominal aortas. Four of these children had Takayasu arteritis, one had moyamoya disease, and one had median arcuate ligament syndrome. One with chronic pyelonephritis had severe stenosis of the proximal right renal artery. The other two children had renal artery stenosis with a nonspecific cause. One child with a normal abdominal aorta and renal arteries had a right suprarenal mass. On pathological examination a ganglioneuroma was found. CTA can help in diagnosis of renovascular hypertension in children and adolescents. Although CTA is not a screening modality, it is appropriate in some situations. (orig.)

Clinical and angiographic characteristics of young adult patients recovered from acute myocardial infarction

Directory of Open Access Journals (Sweden)

Miljković Dušan

2015-01-01

Full Text Available Introduction. Occurrence of acute myocardial infarction in young adults is a relatively rare. In majority of the studies, age of 45 years is used as cut-off line in definition of the young patients with coronary artery disease or myocardial infarction. Studies have shown that younger population aged less than 40 years represents only 2-8% of all patients with myocardial infarction. Objective. The aim of this study was to examine the specificities of clinical and angiographic characteristics of the patients recovered from acute myocardial infarction, younger than 45 years at the moment of attack, by comparing their clinical and angiographic characteristics with those of patients older than 65 years, who recovered from acute myocardial infarction. Method. The study included 78 patients recovered from acute myocardial infarction, 33 patients were younger than 45 years (40.7 ± 3.9 years, 25 (75.7% men and eight (24.2% female, and 45 patients were older than 65 years (68.2 ± 4.2 years, 32 (71.3% men and 13 women. Detailed history taking, physical examination, permanent ECG monitoring, laboratory analyses, X-ray examination, echocardiography and selective coronarography of all patients were performed. Results. Patients younger than 45 years had a significantly higher incidence of STEMI (p 0.05 Multivessel disease existed at 54.5% under the age of 45 and 77.8% older than 65 years (p0.05. The disease of left main coronary artery had 6.1% of patients younger than 45 and 22.2% of patients older than 65 years (p0.05 Were without significant coronary artery stenosis Comparing risk factors for coronary artery disease in patients younger than 45 years and older than 65 years, we find: hypertension in 48.5% vs. 88.9% (p0.05, diabetes mellitus in 21.2% vs. 55.5% (p 0.05, and stress in 18.2% vs. 2.2% (p <0.01. Conclusion. Patients with myocardial infarction younger than 45 years are predominantly male and have a significantly higher incidence of infarction

A review of the studies on listening comprehension in the second language

OpenAIRE

Fukuda, Michiko

2003-01-01

Few studies have been done on the listening comprehension processing, especially in second language. However, recent studies show that listening comprehension is considered as an active and cognitive process. This paper overviews studies on listening comprehension in the second language by presenting some models of listening comprehension processing. Then, listening comprehension was studied from cognitive psychology and educational point of view. Finally, the direction of future researches o...

[Myocardial infarction related to sport. Acute clinical and coronary angiographic characteristics in 16 cases].

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Halna du Fretay, X; Akoudad, H; Nejjari, M; Benamer, H

2013-12-01

Determination of clinical and angiographic characteristics of myocardial infarctions related to sport. Retrospective study of acute coronary syndromes with ST elevation related to sport treated with interventional cardiology from 2006 to 2013. Sixteen patients were included. They are mostly men (15/16), aged 24-65 years (over 35 years old in 13 cases) with few cardiovascular risk factors, most frequently heredity or smoking. Myocardial infarctions usually occur during the practice of sports (13/16), with serious rhythmic complications in three of the cases. On angiography, most patients have single vessel disease (12/16). Myocardial infarction related to sports affects a male population aged over 35 years old with few cardiovascular risk factors, most often single vessel disease, making the preventative screening uneasy. Other studies investigating larger populations, assessing previous clinical events (symptoms, results of stress tests), evaluating the impact of competition and integrating sudden deaths would improve the screening and the treatment of sport-related myocardial infarctions. Copyright © 2013 Elsevier Masson SAS. All rights reserved.

The angiographic findings and interventional treatment of the iatrogenic hemobilia

International Nuclear Information System (INIS)

Wen feng; Lu Zaiming; Sun Wei; Li Wei; Guo Qiyong

2012-01-01

Objective: To evaluate the angiography and interventional embolization in diagnosing and treating the iatrogenic hemobilia. Methods: A total of 21 patients with iatrogenic hemobilia were enrolled in this study. The clinical data were retrospectively analyzed. Percutaneous selective superior mesenteric artery angiography, celiac angiography and common hepatic artery angiography were carried out in all patients. After the bleeding sites were clarified, selective or super-selective catheterization and embolization were performed. The clinical results were analyzed. Results: Active bleeding was confirmed by angiography in all the 21 cases. Angiographic findings included pseudoaneurysm (n=17, 81.0%) and extravasation of contrast medium (n=4, 19.0%). The embolic agents used in this study included polyvinyl alcohol particles (n=2), pure coils (n=8) or Gelfoam particles plus coils (n=11). The success rate of hemostasis after single embolization was 85.7% (18/21), and second embolization procedure had to be carried out in three patients as recurrent massive bleeding occurred in them. All the patients were followed up for 5 to 28 months, and no recurrent hemobilia was observed. No serious complications such as non-targeted vessel embolization, liver function failure, embolization-related infection, etc. occurred. Conclusion: For the treatment of iatrogenic hemobilia, percutaneous selective angiography together with interventional embolization is safe, minimally-invasive, reliable and effective, and this technique should be regarded as the treatment of first choice. (authors)

Idiopathic polypoidal choroidal vasculopathy in Thai patients with clinical and angiographic choroidal neovascularization

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Bhoomibunchoo C

2017-02-01

Full Text Available Chavakij Bhoomibunchoo,1 Yosanan Yospaiboon,1 Somanus Thoongsuwan,2 Duangnate Rojanaporn,3 Nawat Watanachai,4 Pichai Jirarattanasopa,5 Nattapon Wongcumchang,6 Atchara Amphornphruet,7 Sritatath Vongkulsiri,8 Eakkachai Arayangkoon9 1Department of Ophthalmology, Faculty of Medicine, Khon Kaen University, Khon Kaen, 2Department of Ophthalmology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, 3Department of Ophthalmology, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, 4Department of Ophthalmology, Faculty of Medicine, Chiang Mai University, Chiang Mai, 5Department of Ophthalmology, Faculty of Medicine, Prince of Songkla University, Songkhla, 6Department of Ophthalmology, Faculty of Medicine, Thammasat University, Pathum Thani, 7Department of Ophthalmology, Rajavithi Hospital, Bangkok, 8Department of Ophthalmology, Phramongkutklao Hospital, Bangkok, 9Department of Ophthalmology, Mettapracharak Hospital, Nakhon Pathom, Thailand Objective: This study aimed to study the prevalence and characteristics of idiopathic polypoidal choroidal vasculopathy (IPCV in Thai patients with clinical and angiographic choroidal neovascularization (CNV.Patients and methods: A consecutive case study of 140 patients presenting with CNV was conducted in nine large referral eye centers throughout Thailand. The demographic data, fundus photographs, fundus fluorescein angiography and indocyanine green angiography of the patients were analyzed.Results: Of 129 patients with clinical and angiographic CNV, IPCV was diagnosed in 100 patients (77.52%, idiopathic CNVs in 16 patients (12.40% and age-related macular degeneration (AMD in 12 patients (9.30%. Of the 107 eyes with IPCV, 90 eyes (84.11% had both branching venous networks (BVNs and polypoidal lesions. Most IPCV patients (93% had unilateral involvement and were at a younger age than AMD patients. In all, 79 eyes (73.83% had lesions found in the macular area, 14 eyes (13.08% in the

Pelvic Arterial Anatomy Relevant to Prostatic Artery Embolisation and Proposal for Angiographic Classification

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Assis, André Moreira de, E-mail: andre.maa@gmail.com; Moreira, Airton Mota, E-mail: motamoreira@gmail.com; Paula Rodrigues, Vanessa Cristina de, E-mail: vanessapaular@yahoo.com.br [University of Sao Paulo Medical School, Interventional Radiology and Endovascular Surgery Department, Radiology Institute (Brazil); Harward, Sardis Honoria, E-mail: sardis.harward@merit.com [The Dartmouth Center for Health Care Delivery Science (United States); Antunes, Alberto Azoubel, E-mail: antunesuro@uol.com.br; Srougi, Miguel, E-mail: srougi@usp.br [University of Sao Paulo Medical School, Urology Department (Brazil); Carnevale, Francisco Cesar, E-mail: fcarnevale@uol.com.br [University of Sao Paulo Medical School, Interventional Radiology and Endovascular Surgery Department, Radiology Institute (Brazil)

2015-08-15

PurposeTo describe and categorize the angiographic findings regarding prostatic vascularization, propose an anatomic classification, and discuss its implications for the PAE procedure.MethodsAngiographic findings from 143 PAE procedures were reviewed retrospectively, and the origin of the inferior vesical artery (IVA) was classified into five subtypes as follows: type I: IVA originating from the anterior division of the internal iliac artery (IIA), from a common trunk with the superior vesical artery (SVA); type II: IVA originating from the anterior division of the IIA, inferior to the SVA origin; type III: IVA originating from the obturator artery; type IV: IVA originating from the internal pudendal artery; and type V: less common origins of the IVA. Incidences were calculated by percentage.ResultsTwo hundred eighty-six pelvic sides (n = 286) were analyzed, and 267 (93.3 %) were classified into I–IV types. Among them, the most common origin was type IV (n = 89, 31.1 %), followed by type I (n = 82, 28.7 %), type III (n = 54, 18.9 %), and type II (n = 42, 14.7 %). Type V anatomy was seen in 16 cases (5.6 %). Double vascularization, defined as two independent prostatic branches in one pelvic side, was seen in 23 cases (8.0 %).ConclusionsDespite the large number of possible anatomical variations of male pelvis, four main patterns corresponded to almost 95 % of the cases. Evaluation of anatomy in a systematic fashion, following a standard classification, will make PAE a faster, safer, and more effective procedure.

Right ventricular ejection fraction - comparison of various angiographic and radionuclide approaches

International Nuclear Information System (INIS)

Schicha, H.; Tebbe, U.; Voth, E.; Sciagra, R.; Schultz, W.; Neuhaus, G.; Goettingen Univ.

1987-01-01

In 21 patients with various heart diseases RVEF was measured angiographically and by radionuclide ventriculography. Using biplane angiocardiography evaluation was performed by 7 different methods (Simpson's rule, Dogde, Arcilla, Ferlinz, Duebel). Using equilibrium RNV, evaluation was performed by 9 modifications of analysis. Problems were evident to separate the right atrium from the ventricle and to define the site of the pulmonary valve. The results show that when using the various methods of angiography considerable variations of the absolute volumes occur, but least so with RVEF. When using RNV with one single enddiastolic ROI, the RVEF was much too low. By means of the enddiastolic/endsystolic Double-ROI-method a good agreement with angiography was found, with correlation coefficients up to r=0.85. There was only a minor effect of background correction. (orig.) [de

MYOCARDIAL BRIDGING - CLINICAL AND ANGIOGRAPHIC PROFILE IN LAST 5 YEARS; A STUDY OF 129 CASES

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Abhilash S P

2010-11-01

Full Text Available Aims of study : To assess the clinical and angiographical profile of myocardial bridging from consecutive coronary angiograms done over last 5 years at Medical college, Thiruvananthapuram. To assess the risk of cardiovascular events and the risk of accelerated atherosclerosis in isolated myocardial bridging. Methods : Consecutive coronary angiograms done at Medical college Thiruvananthapuram from 04/02/2005 to 31/03/2010 were reviewed for myocardial bridging. A total of 10492 coronary angiograms were reviewed. Myocardial bridges with systolic lumen reduction of more than 50% were considered for analysis. Quantitative coronary angiography (QCA was used for analysis. Clinical presentation as well as correlation with structural heart disease and coronary heart disease was assessed. Results: Incidence of myocardial bridges was 1.23%. Of the 129 patients with myocardial bridges 63 ( 48.8% had associated significant coronary artery disease. Remaining 66 (51.2% patients presented with isolated bridges. Out of these 66 patients with isolated myocardial bridges, 7 (10.6% patients presented with acute myocardial infarction and 3 (4.5% presented with cardiac arrhythmias. Of the 63 patients with significant coronary disease 11 (17.5% patients had single vessel disease and they had the culprit lesion and myocardial bridge seen in the same vessel. Most common location of myocardial bridge was mid LAD (64.9% followed by distal LAD (23.8%. Length of bridge was 20 mm in 35.7%. Mean percentage of systolic obliteration by the bridge was 74.5%. 100% systolic obliteration was seen in 7.79% of isolated bridges and in 9.79% of bridges with CAD. Among 120 rhuematic heart disease patients who underwent coronary angiogram, 10 (8.3% patients had myocardial bridging. 12.1% of all HCM patients who underwent coronary angiograms had myocardial bridging. Conclusion: Myocardial bridging can be lethal- can accelerate atherosclerosis, can precipitate acute MIs and life

Angiographic examinations with the medium size technique (70 mm films)

International Nuclear Information System (INIS)

Heuck, F.; Reichardt, W.

1981-01-01

The applicability of medium-size technique was tested in angiographic examinations of thoracic and abdominal organs. By means of full-size image intensifiers it is possible to carry out organ angiography, and by means of a pace control mechanism for the patient transport, the angiography of the extremities can be realized. Examples are given illustrate the informational value in cases where the arial and venous vascular systems of organs and extremities are concerned. The particular advantages for functional analyses of organ circulatory systems in cases of angiography are described. Two factors of importance are pointed out: the reduction of the exposure to irradiation for the patient on the one hand, and the increasing film prices on the other hand. The authors demand to overcome the psychological problems arising in the medical working groups where the medium-size technique shall be introduced into routine diagnostics. (orig./APR) [de

Stenting for symptomatic vertebral artery stenosis associated with bilateral carotid rate mirabile: The long-term clinical and angiographic outcome

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Baek, Jang Hyun; Kim, Byung Moon [Dept. of Radiology, Severance Hospital, Yonsei University College of Medicine, Seoul (Korea, Republic of)

2015-06-15

Symptomatic vertebral artery (VA) stenosis associated with bilateral carotid rate mirabile (CRM) has not been reported. We report the long-term clinical and angiographic outcome after stenting for symptomatic VA stenosis in the patient with bilateral CRM. This report is the first case that symptomatic VA stenosis associated with bilateral CRM was treated with stenting.

Stenting for symptomatic vertebral artery stenosis associated with bilateral carotid rate mirabile: The long-term clinical and angiographic outcome

International Nuclear Information System (INIS)

Baek, Jang Hyun; Kim, Byung Moon

2015-01-01

Symptomatic vertebral artery (VA) stenosis associated with bilateral carotid rate mirabile (CRM) has not been reported. We report the long-term clinical and angiographic outcome after stenting for symptomatic VA stenosis in the patient with bilateral CRM. This report is the first case that symptomatic VA stenosis associated with bilateral CRM was treated with stenting.

Angiographic predictors of 3-year patency of bypass grafts implanted on the right coronary artery system: a prospective randomized comparison of gastroepiploic artery, saphenous vein, and right internal thoracic artery grafts.

Science.gov (United States)

Glineur, David; D'hoore, William; de Kerchove, Laurent; Noirhomme, Philippe; Price, Joel; Hanet, Claude; El Khoury, Gebrine

2011-11-01

Saphenous vein, in situ right gastroepiploic artery, and right internal thoracic artery grafts are routinely used to revascularize the right coronary artery. Little is known about the predictive value of objective preoperative angiographic parameters on midterm graft patency. We prospectively enrolled 210 consecutive patients undergoing coronary revascularization. Revascularization of the right coronary artery was randomly performed with the saphenous vein grafts in 81 patients and the right gastroepiploic artery in 92 patients. During the same study period, 37 patients received right coronary artery revascularization with the right internal thoracic artery used in a Y-composite fashion. All patients underwent a protocol-driven coronary angiogram 3 years after surgery. Preoperative angiographic parameters included minimum lumen diameter percent stenosis measured by quantitative angiography. A graft was considered "not functional" with patency scores of 0 to 2 and "functional" with patency scores of 3 or 4. Angiographic follow-up was 100% complete. A significant difference in the distribution of flow patterns was observed in the 3 groups. In multivariate analysis, the use of a saphenous vein graft was associated with superior graft functionality compared with the other conduits (odds ratio, 6.1; 95% confidence interval, 2.4-15). Graft function was negatively influenced by the minimum lumen diameter (odds ratio, 0.11; confidence interval, 0.05-0.25). In the right gastroepiploic artery and right internal thoracic artery groups, the proportion of functional grafts was higher when the minimum lumen diameter was below a threshold value in the third minimum lumen diameter quartile (0.64-1.30 mm). Preoperative angiography predicts graft patency in the right gastroepiploic artery and right internal thoracic artery, whereas the flow pattern in saphenous vein grafts is significantly less influenced by quantitative angiographic parameters. Copyright © 2011 The American

Recurrent bleeding after arterial embolization in patients with hemoptysis : Comparison of angiographic findings and relapsing period

International Nuclear Information System (INIS)

Park, Sung Keun; Choi, Seok Jin; Choi, Gi Bok; Kim, Hae Yeon; Park, Auh Whan; Juhn, Jae Ryang; Cha, Seong Sook

2001-01-01

To describe the angiographic findings of patients with recurrent hemoptysis after bronchial artery embolization (BAE) according to the point at which relapse occurred. From 125 patients who underwent BAE due to hemoptysis between 1996 and 2000, we selected 18 of 23 who underwent additional BAE due to recurrent bleeding after initial BAE. Depending on the point at which relapse occurred, they were divided into two groups (I and ll, according to whether additional BAE was performed within two weeks of initial BAE or more than two weeks after this) We retrospectively compared the two groups in terms of angiographic findings, number of embolized arteries, and character of feeding arteries at initial and additional BAE. Nine patients in group I (additional BAE: n=10) and nine in group ll (additional BAE: n=13) were admitted for recurrent hemoptysis within two weeks of initial BAE and more than two weeks after this, respectively. In group I (n=29) and ll(n=31), angiography demonstrated two direct and 27 indirect, and two direct and 29 indirect signs of hemorrhage, respectiveIy. No statistically significant differences were observed (x 2 =0.005, ρ=0.945). Among the embolized feeder ressels in group I (n=30) there were 20 bronchial artery and 10 non bronchial systemic collaterals, while for group ll (n=35), the corresponding totals were 21 and 14. Again, no statistically significant differences were encountered(x 2 =0.308; ρ=0.579). In group I, feeders were newly developed in one case(10%), previously embolized in five(50%), and missed in four(40%), while in group two the corresponding figures were none, twelve(92.3%), and one(7.7%) No significant differences were noted, though the incidence of previously embolized feeders in Group ll was very high (x 2 =5.383, ρ=0.068). Among patients in whom hemoptysis after BAE recurred at different times, the angiographic findings and number of embolized arteries were not significantly different, but differences in the nature of the

The prevalence and clinical profile of angiographic coronary ectasia

International Nuclear Information System (INIS)

Sultana, R.; Ishaq, M.; Samad, A.

2011-01-01

To determine the incidence of Coronary Artery Ectasia (CAE) at our teaching hospital to describe the patients and angiographic characteristics. Methods: A retrospective analysis was conducted on all coronary angiograms performed at the catheterization laboratory of Karachi Institute of Heart Diseases, a tertiary care center, between the period of August 2006 and August 2008. A one year follow up was performed to look for primary and secondary endpoints. Data were collected from catheterization films, and medical records. Results: Five thousand coronary angiograms were performed during the period of of the study. A total of 140 (2.8%) angiograms showed coronary ectasia of both mixed and pure types. Pure ectasia with no coronary obstructive lesions was seen in 75 (1.5%). The left anterior descending artery (LAD) was the most commonly affected vessel (63%) followed by the right coronary artery (RCA) 25% and 10% patients had circumflex artery involvement. The primary composite endpoint showed 6 (4.2%) patients with non-ST elevation MI, 5 (3.6%) with ST elevation inferior wall myocardial infarction, 70 (50%) with unstable angina and 2 (1.4%) deaths due to pulmonary oedema. Secondary endpoints showed 50% of the patients still complaining of chest pain. Conclusion: Prevalence of Coronary ectasia in the population presenting to KIHD during the study period was 1.5%. Majority of patients were males, associated with dyslipidaemia, hypertension and smoking. CAE was associated with obstructive coronary artery disease in about 80% of cases. LAD was the most commonly affected vessel. (author)

Comparative functional scintigraphic and angiographic examination in pancreas diseases

International Nuclear Information System (INIS)

Mendizov, A.; Brilski, V.; Bozhiyanov, A.; Romanova, A.; Mardzhanov, I.; Glavincheva, I.; Meditsinska Akademiya, Sofia

1979-01-01

Pancreas scintigraphy with 75 seleno-methionine, pancreocimine-secretine test and selective abdominal angiography was carried out in patients with chronic pancreatitis, pancreas carcinoma and subjects without any pancreas diseases. Scintigraphic changes in pancreas was found in 95,6 per cent of the patients with chronic pancreatitis (136 patients), in 92 per cent of them with pancreas carcinoma (25 patients) and in 53,4 per cent from the subjects without pancreas diseases (30 examined). Pathological changes in pancreatic secretion was found in 93,4 per cent of the patients with chronic pancreatitis (105 patients), in 93,8 per cent of the subjects with pancreas carcinoma (32 patients) and only in 3,9 per cent from the examined without pancreatic diseases. The angiographic examination is informative mainly in case of tumours and cysts of the pancreas. The diagnostic potentialities of the separate methods for pancreas examination were critically assessed. The basic diagnostic problems in pancreas diseases are solved to a great extent with the combined examination with scintigraphy pancreocimine test and angiography (76 patients). (author)

CT Angiographic Demonstration of a Mesenteric Vessel 'Whirlpool' in Intestinal Malrotation and Midgut Volvulus: a Case Report

International Nuclear Information System (INIS)

Bozlar, Ugur; Ugurel, Mehmet Sahin; Ustunsoz, Bahri; Coskun, Unsal

2008-01-01

Although the color Doppler ultrasonography diagnosis of intestinal malrotation with midgut volvulus, based on the typical 'whirlpool' appearance of the mesenteric vascular structures is well-defined in the peer-reviewed literature, the combination of both the angiographic illustration of these findings and the contemporary state-of-the-art imaging techniques is lacking. We report the digital subtraction angiography and multidetector computed tomography angiography findings of a 37-year-old male with intestinal malrotation

A predictive study of reading comprehension in third-grade Spanish students.

Science.gov (United States)

López-Escribano, Carmen; Elosúa de Juan, María Rosa; Gómez-Veiga, Isabel; García-Madruga, Juan Antonio

2013-01-01

The study of the contribution of language and cognitive skills to reading comprehension is an important goal of current reading research. However, reading comprehension is not easily assessed by a single instrument, as different comprehension tests vary in the type of tasks used and in the cognitive demands required. This study examines the contribution of basic language and cognitive skills (decoding, word recognition, reading speed, verbal and nonverbal intelligence and working memory) to reading comprehension, assessed by two tests utilizing various tasks that require different skill sets in third-grade Spanish-speaking students. Linguistic and cognitive abilities predicted reading comprehension. A measure of reading speed (the reading time of pseudo-words) was the best predictor of reading comprehension when assessed by the PROLEC-R test. However, measures of word recognition (the orthographic choice task) and verbal working memory were the best predictors of reading comprehension when assessed by means of the DARC test. These results show, on the one hand, that reading speed and word recognition are better predictors of Spanish language comprehension than reading accuracy. On the other, the reading comprehension test applied here serves as a critical variable when analyzing and interpreting results regarding this topic.

Lipoprotein subclasses in the Monitored Atherosclerosis Regression Study (MARS). Treatment effects and relation to coronary angiographic progression.

Science.gov (United States)

Mack, W J; Krauss, R M; Hodis, H N

1996-05-01

Accumulating evidence suggests that triglyceride-rich lipoproteins contribute to coronary artery disease. Using data from the Monitored Atherosclerosis Regression Study, an angiographic trial of middle-aged men and women randomized to lovastatin or placebo, we investigated relationships between lipoprotein subclasses and progression of coronary artery atherosclerosis. Coronary artery lesion progression was determined by quantitative coronary angiography in low-grade ( or = 50% diameter stenosis), and all coronary artery lesions in 220 baseline/2-year angiogram pairs. Analytical ultracentrifugation was used to measure lipoprotein masses that were statistically evaluated for treatment group differences and relationships to progression of coronary artery atherosclerosis. All low density lipoprotein (LDL), intermediate density lipoprotein (IDL), and very low density lipoprotein (VLDL) masses were significantly lowered and all high density lipoprotein (HDL) masses were significantly raised with lovastatin therapy. The mass of smallest LDL (Svedberg flotation rate [Sf] 0 to 3), IDL (Sf 12 to 20), all VLDL subclasses (Sf 20 to 60, Sf 60 to 100, and Sf 100 to 400), and peak LDL flotation rate were significantly related to the progression of coronary artery lesions, specifically low-grade lesions. Greater baseline levels of HDL3, were related to a lower likelihood of coronary artery lesion progression. In multivariate analyses, small VLDL (Sf 20 to 60) and HDL3 mass were the most important correlates of coronary artery lesion progression. These results provide further evidence for the importance of triglyceride-rich lipoproteins in the progression of coronary artery disease. In addition, these results present new evidence for the possible protective role of HDL3 in the progression of coronary artery lesions. More specific information on coronary artery lesion progression may be obtained through the study of specific apolipoprotein B-containing lipoproteins.

Simultaneous occurrence of a severe Morel-Lavallée lesion and gluteal muscle necrosis as a sequela of transcatheter angiographic embolization following pelvic fracture: a case report.

Science.gov (United States)

Shimizu, Takayoshi; Matsuda, Shuichi; Sakuragi, Atsushi; Tsukie, Tomio; Kawanabe, Keiichi

2015-03-26

Morel-Lavallée lesions are posttraumatic hemolymphatic collections caused by disruption of the interfascial planes between the subcutaneous soft tissue and muscle. Severe peripelvic Morel-Lavallée lesions have rarely been reported in the literature. By contrast, a number of cases of gluteal muscle necrosis following transcatheter angiographic embolization for pelvic fracture have been reported. Each entity can result in severe infection and sepsis, and the mortality rate in such cases is quite high. However, to date, no previous reports have described a case in which these life-threatening entities occurred simultaneously. A 32-year-old Asian man simultaneously developed severe peripelvic Morel-Lavallée lesions and gluteal muscle necrosis with sepsis following transcatheter angiographic embolization after an unstable pelvic fracture. Extremely large skin and soft tissue defects, which were untreatable with any commonly used flaps, were generated after repeated debridement. In addition, a deep-bone infection was suspected in his left fractured iliac bone, while motor function was almost completely lost in his left leg, possibly as a sequela of transcatheter angiographic embolization. As a result of his condition, a left hemipelvectomy was unavoidable. A pedicled fillet flap from his sacrificed left limb was used for the treatment of the defects and to provide a durable base for a prosthesis. Our patient survived and returned to his previous job 24 months after the surgery wearing a prosthetic left leg. As illustrated by the present case, severe peripelvic Morel-Lavallée lesions and gluteal muscle necrosis following transcatheter angiographic embolization can occur simultaneously after unstable pelvic fractures. Physicians should recognize that these entities can result in life-threatening sepsis and, therefore, should attempt to detect them as early as possible. When hemipelvectomy is unavoidable, a pedicled upper and lower leg in-continuity fillet flap may

Prediction of optimal deployment projection for transcatheter aortic valve replacement: angiographic 3-dimensional reconstruction of the aortic root versus multidetector computed tomography.

Science.gov (United States)

Binder, Ronald K; Leipsic, Jonathon; Wood, David; Moore, Teri; Toggweiler, Stefan; Willson, Alex; Gurvitch, Ronen; Freeman, Melanie; Webb, John G

2012-04-01

Identifying the optimal fluoroscopic projection of the aortic valve is important for successful transcatheter aortic valve replacement (TAVR). Various imaging modalities, including multidetector computed tomography (MDCT), have been proposed for prediction of the optimal deployment projection. We evaluated a method that provides 3-dimensional angiographic reconstructions (3DA) of the aortic root for prediction of the optimal deployment angle and compared it with MDCT. Forty patients undergoing transfemoral TAVR at St Paul's Hospital, Vancouver, Canada, were evaluated. All underwent preimplant 3DA and 68% underwent preimplant MDCT. Three-dimensional angiographic reconstructions were generated from images of a C-arm rotational aortic root angiogram during breath-hold, rapid ventricular pacing, and injection of 32 mL contrast medium at 8 mL/s. Two independent operators prospectively predicted perpendicular valve projections. The implant angle was chosen at the discretion of the physician performing TAVR. The angles from 3DA, from MDCT, the implant angle, and the postdeployment perpendicular prosthesis view were compared. The shortest distance from the postdeployment perpendicular prosthesis projection to the regression line of predicted perpendicular projections was calculated. All but 1 patient had adequate image quality for reproducible angle predictions. There was a significant correlation between 3DA and MDCT for prediction of perpendicular valve projections (r=0.682, Pregression line of predicted angles to the postdeployment prosthesis view was 5.1±4.6° for 3DA and 7.9±4.9° for MDCT (P=0.01). Three-dimensional angiographic reconstructions and MDCT are safe, practical, and accurate imaging modalities for identifying the optimal perpendicular valve deployment projection during TAVR.

Craniocervical artery dissection: MR imaging and MR angiographic findings

International Nuclear Information System (INIS)

Oelerich, M.; Schuierer, G.; Stoegbauer, F.; Kurlemann, G.; Schul, C.

1999-01-01

Dissection of the carotid and vertebral arteries is a not so uncommon cause of stroke and has to be considered as a differential diagnosis especially in younger patients. Therapeutic and prognostic implications are different from those in extracranial atherosclerotic disease. Dissection results from hemorrhage into the vessel wall usually between the layers of the media. Digital subtraction angiography (DSA) depicts the resulting luminal compromise that may reveal some typical, but not specific, findings. The same is true for non-invasive angiographic techniques such as time-of-flight magnetic resonance angiography (MRA) and computed tomography angiography (CTA), which have shown accurate results compared with DSA. The main advantage of these techniques is the direct visualization of the vessel wall confirming the intramural hematoma. This is achieved best with MR imaging due to the high signal of blood degradation products on T1- and T2-weighted images. Therefore, MRI in combination with MRA is presently the method of choice for initial diagnosis and follow-up of craniocervical artery dissection (CCAD). In some questionable cases, CTA is a non-invasive alternative that is independent of flow phenomena. (orig.)

Craniocervical artery dissection: MR imaging and MR angiographic findings

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Oelerich, M.; Schuierer, G. [Institute of Clinical Radiology, University of Muenster (Germany); Stoegbauer, F. [Department of Neurology, University of Muenster (Germany); Kurlemann, G. [Department of Pediatric Neurology, University of Muenster (Germany); Schul, C. [Department of Neurosurgery, University of Muenster (Germany)

1999-09-01

Dissection of the carotid and vertebral arteries is a not so uncommon cause of stroke and has to be considered as a differential diagnosis especially in younger patients. Therapeutic and prognostic implications are different from those in extracranial atherosclerotic disease. Dissection results from hemorrhage into the vessel wall usually between the layers of the media. Digital subtraction angiography (DSA) depicts the resulting luminal compromise that may reveal some typical, but not specific, findings. The same is true for non-invasive angiographic techniques such as time-of-flight magnetic resonance angiography (MRA) and computed tomography angiography (CTA), which have shown accurate results compared with DSA. The main advantage of these techniques is the direct visualization of the vessel wall confirming the intramural hematoma. This is achieved best with MR imaging due to the high signal of blood degradation products on T1- and T2-weighted images. Therefore, MRI in combination with MRA is presently the method of choice for initial diagnosis and follow-up of craniocervical artery dissection (CCAD). In some questionable cases, CTA is a non-invasive alternative that is independent of flow phenomena. (orig.) With 6 figs., 2 tabs., 33 refs.

The relationship between cerebral infarction on MR and angiographic findings in moyamoya disease: significance of the posterior circulation

Energy Technology Data Exchange (ETDEWEB)

Lee, Eun Ja; Song, Soon Young [College of Medicine, Kwangdong Univ., Koyang (Korea, Republic of); Yu, Won Jong; Jung, So Lyung; Chung, Bong Gak; Kag, Si Won [College of Medicine, The Catholic Univ. of Korea, Seoul (Korea, Republic of); Kim, Man Deuk [College of Medicine, Pochon CHA Univ., Pochon (Korea, Republic of)

2002-06-01

To investigate the relationship between changes in the posterior and anterior circulation, as seen at angiography, and the frequency and extent of cerebral infarction revealed by MR imaging in moyamoya disease. This study involved 34 patients (22 females and 12 males, aged 2-52 years) in whom cerebral angiography revealed the presence of moyamoya disease (bilateral; unilateral= 24:10; total hemispheres=58) and who also underwent brain MR imaging. To evaluate the angiographic findings, we applied each angiographic staging system to the anterior and posterior circulation. Leptomeningeal collateral circulation from the cortical branches of the posterior cerebral artery (PCA) was also assigned one of four grades. At MR imaging, areas of cerebral cortical or subcortical infarction in the hemisphere were divided into six zones. White matter and basal ganglionic infarction, ventricular dilatation, cortical atrophy, and hemorrhagic lesions were also evaluated. To demonstrate the statistical significance of the relationship between the angiographic and the MR findings, both the Mantel-Haenszel chi-square test for trend and the chi-square test were used. The degree of steno-occlusive PCA change correlated significantly with the internal carotid artery (ICA) stage (p<0.0001). As PCA stages advanced, the degree of leptomeningeal collaterals from the PCA decreased significantly (P<0.0001), but ICA stages were not significant (p>0.05). The prevalence of infarction showed significant correlation with the degree of steno-occlusive change in both the ICA and PCA. The degree of cerebral ischemia in moyamoya patients increased proportionally with the severity of PCA stenosis rather than with that of steno-occlusive lesins of the anterior circulation. Infarctions tended to be distributed in the anterior part of the hemisphere at PCA state I or II, while in more advanced PCA lesions, they were also found posteriorly, especially in the territories of the posterior middle cerebral artery

Zinc and copper levels are not correlated with angiographically-defined coronary artery disease in sudanese patients.

Science.gov (United States)

Lutfi, Mohamed F; Elhakeem, Ramaze F; Khogaly, Raga S; Abdrabo, Abdelkarim A; Ali, Ahmed B; Gasim, Gasim I; Adam, Ishag

2015-01-01

We investigated zinc and copper levels in angiographically defined obstructive coronary artery disease (CAD) in patients undergoing elective coronary angiography in El-Shaab Hospital, Sudan. We performed a cross-sectional study. One hundred forty-two patients were enrolled. Sociodemographic and medical characteristics were collected using a questionnaire. Glucose, lipid, zinc, and copper levels were measured. Out of 142 patients, 102 (71.8%) had CAD and 40 (28.2%) had patent coronary arteries. There were no significant differences in median (interquartile range) zinc [118.5 (97.2-151.0) vs. 130.0 (106.0-174.0) μg/ml, P = 0.120] and copper [150.6 (125.0-183.0) vs. 158 (132.0-180.0) μg/mL, P = 0.478] levels between patients with CAD and those with patent coronary arteries. In linear regression analysis, there were no associations between CAD and zinc and copper levels. The current study failed to show any significant association between CAD and zinc and copper levels.

Cooling tower drift: comprehensive case study

International Nuclear Information System (INIS)

Laulainen, N.S.; Ulanski, S.L.

1979-01-01

A comprehensive experiment to study drift from mechanical drift cooling towers was conducted during June 1978 at the PG and E Pittsburg Power Plant. The data from this study will be used for validation of drift deposition models. Preliminary results show the effects of tower geometry and orientation with respect to the wind and to single- or two-tower operation. The effect of decreasing relative humidity during a test run can also be seen

Angiographic Embolization of a Postpartum Vulvovaginal Hematoma in a Patient with Situs Inversus Totalis: An Effective Second-Line Treatment

Directory of Open Access Journals (Sweden)

Elias M. Dahdouh

2013-01-01

Full Text Available Situs inversus totalis is a rare congenital anomaly where asymmetrical positioning of internal organs may affect the surgical and radiological management of certain conditions. Vulvovaginal hematoma is a life-threatening complication of vaginal delivery whose primary treatment usually consists of incision and drainage of the hematoma and ligation of the responsible vessels, followed by wound packing. Failure of these measures to control the bleeding was previously considered as an indication for laparotomy to perform bilateral hypogastric artery ligation and, if needed, a hysterectomy. Relative to major abdominal surgery, selective percutaneous angiographic embolization offers considerable advantages and significant less morbidity. Indeed, angiographic embolization is routinely used as a measure to control refractory pelvic bleeding, though the literature and experience in women with situs inversus totalis are scarce. In this paper, we report a case of postpartum vulvovaginal hematoma in a patient with situs inversus, refractory to conventional treatment, where arteriographic embolization was successfully used to control the bleeding. The management of this obstetrical complication and the use of this minimally invasive technique are also reviewed. To the best of our knowledge, this is the first report in the literature describing the feasibility of this technique in a patient with situs inversus totalis.

Fully automatic algorithm for the analysis of vessels in the angiographic image of the eye fundus

Directory of Open Access Journals (Sweden)

Koprowski Robert

2012-06-01

Full Text Available Abstract Background The available scientific literature contains descriptions of manual, semi-automated and automated methods for analysing angiographic images. The presented algorithms segment vessels calculating their tortuosity or number in a given area. We describe a statistical analysis of the inclination of the vessels in the fundus as related to their distance from the center of the optic disc. Methods The paper presents an automated method for analysing vessels which are found in angiographic images of the eye using a Matlab implemented algorithm. It performs filtration and convolution operations with suggested masks. The result is an image containing information on the location of vessels and their inclination angle in relation to the center of the optic disc. This is a new approach to the analysis of vessels whose usefulness has been confirmed in the diagnosis of hypertension. Results The proposed algorithm analyzed and processed the images of the eye fundus using a classifier in the form of decision trees. It enabled the proper classification of healthy patients and those with hypertension. The result is a very good separation of healthy subjects from the hypertensive ones: sensitivity - 83%, specificity - 100%, accuracy - 96%. This confirms a practical usefulness of the proposed method. Conclusions This paper presents an algorithm for the automatic analysis of morphological parameters of the fundus vessels. Such an analysis is performed during fluorescein angiography of the eye. The presented algorithm automatically calculates the global statistical features connected with both tortuosity of vessels and their total area or their number.

Progressive Occlusion of Enterprise Stent-Assisted Coiling of Ruptured Wide-Necked Intracranial Aneurysms and Related Factors on Angiographic Follow-Up: A Single-Center Experience with 468 Patients

Science.gov (United States)

Liu, Aihua; Li, Youxiang; Jiang, Chuhan; Wu, Zhongxue

2014-01-01

This study was designed to assess the effect of the Enterprise stent on progressive occlusion of wide-necked aneurysms and to evaluate the association between dubious factors and progressive occlusion, which is a consecutive, retrospective, single-center study. Data from 468 patients with 495 wide-necked aneurysms, who had undergone Enterprise stent-assisted coiling (SAC) were reviewed, and the clinical outcomes and the angiographic results were analyzed. A 14-month clinical follow-up was achieved in 421 of the 468 patients (90.0%), showing modified Rankin Scale (mRS) 0–1 in 364 (86.4%), mRS 2 in 17 (4.1%), mRS 3 in 17 (4.1%), mRS 4–5 in 9 (2.1%), and mRS 6 in 14 (3.3%) patients. Overall, the morbidity and mortality were 10.2% and 3.3%, respectively. Initial angiographic results showed Raymond scale (RS)1 in 273 (55.2%), RS2 in 194 (39.2%), and RS3 in 28 (5.6%) patients. Eight-month angiographic follow-up was available in 394 of 495 patients (79.6%), and RS1 was seen in 315 (79.9%), RS2 in 65 (16.5%) and RS3 in 14 (3.6%) cases. At the end of the follow-up, 115 of the 165 (69.7%) patients with initial RS2 and RS3 showed progressive occlusion. Statistical analysis showed no significant difference between progressive occlusion and age (p = 0.654), sex (p = 0.016), aneurysm diameter (p = 0.010), neck size (p = 0.124), dome-to neck ratio (DNR) (p = 0.018) and location (p = 0.001) at the time of follow-up. SAC using Enterprise stent is not only feasible for wide-necked aneurysms, but can achieve a high rate of progressive occlusion with good clinical outcomes at medium-term follow-up. Patient age and aneurysm neck size showed no associated with progressive occlusion at follow-up, while sex, aneurysm diameter, DNR and location were significantly associated with progressive occlusion. PMID:24658387

CT Angiographic Demonstration of a Mesenteric Vessel 'Whirlpool' in Intestinal Malrotation and Midgut Volvulus: a Case Report

Energy Technology Data Exchange (ETDEWEB)

Bozlar, Ugur; Ugurel, Mehmet Sahin; Ustunsoz, Bahri [Gulhane Military Medical Academy, Ankara (Turkmenistan); Coskun, Unsal [Gulhane Military Medical Academy, Turkish Armed Forces Rehabilitation Center, Ankara (Turkmenistan)

2008-10-15

Although the color Doppler ultrasonography diagnosis of intestinal malrotation with midgut volvulus, based on the typical 'whirlpool' appearance of the mesenteric vascular structures is well-defined in the peer-reviewed literature, the combination of both the angiographic illustration of these findings and the contemporary state-of-the-art imaging techniques is lacking. We report the digital subtraction angiography and multidetector computed tomography angiography findings of a 37-year-old male with intestinal malrotation.

Coronary artery ectasia, its clinical profile and angiographic characteristics, single centre experience

International Nuclear Information System (INIS)

Ahmed, N.; Mohyudin, M.T.; Saad, A.A.; Iqbal, M.M.

2013-01-01

Objective: To evaluate the incidence of coronary ectasia and its, its clinical profile and angiographic characteristics in our population. Methods: A retrospective analysis was conducted on all coronary angiograms performed at the catheterization laboratory of Ch. Pervaiz Elahi Institute of Cardiology, Multan between the period of January 2011 and December 2012. Data were collected from catheterization films, and medical records. Results: In a total of 6540 coronary angiograms were performed during the period of the study. A total of 225 (3.44%) angiograms showed coronary ectasia of both mixed and pure types. Pure ectasia with no coronary obstructive lesions was seen in 58 (25.77%). Type 4 was most common 95 pts. (42.22%), as per the Markis classification. Right coronary artery (RCA) was the most commonly affected vessel 162 (72%) followed by left anterior descending artery (LAD) 76 (33.78%) and 38 patients (16.88%) patients had circumflex artery involvement. 132 patients (58.66%) had good left ventricular (LV) systolic function. Conclusion: Prevalence of Coronary ectasia in the population presenting to Ch. Pervaiz Elahi Institute of Cardiology, Multan during the study period was 3.4%. Majority of patients were males, associated with, hypertension and diabetes mellitus. CAE was associated with obstructive coronary artery disease in about 74.22% of cases. RCA was the most commonly affected vessel. (author)

A view of studies on listening comprehension within the theory of working memory

OpenAIRE

福田, 倫子

2004-01-01

The present paper discusses four aspects : (1) the relation between the process of language comprehension and working memory, (2) overview of studies on working memory model, (3) application of the working memory to studies of listening comprehension in previous studies, (4) potentiality of application of the working memory model to studies of listening comprehension of second language acquisition.

Comprehensive study on nuclear weapons. Summary of a United Nations study

International Nuclear Information System (INIS)

1991-01-01

In December 1988, by resolution 43/75N, the United Nations General Assembly requested the Secretary-General to carry out a comprehensive update of a 1980 study on nuclear weapons. The study was to take into account recent relevant studies, and consider the political, legal and security aspects of: (a) nuclear arsenals and pertinent technological developments; (b) doctrines concerning nuclear weapons; (c) efforts to reduce nuclear weapons; (d) physical, environmental, medical and other effects of the use of nuclear weapons and of nuclear testing; (e) efforts to achieve a comprehensive nuclear-test ban; (f) efforts to prevent the use of nuclear weapons and their horizontal and vertical proliferation; and (g) the question of verification of compliance with nuclear-arms limitation agreements. The Group's report is presented in nine chapters, eight of which are summarized here; chapter 9, entitled ''Conclusions'', is included in its entirety. In his foreword to the report, the Secretary-General observes that the study represents the most comprehensive review of the relevant developments in the field over the last decade and was carried out during a period of ''far-reaching changes in international relations'' and an ''unprecedented evolution in the relationship between East and West''. This period experienced for the first time the initiation of an effective process of reduction of nuclear weapon stockpiles

Angiographic follow-up after carotid artery stenting of bifurcation stenosis; Angiographische Verlaufskontrolle nach Stentimplantation zur Behandlung der Karotisbifurkationsstenose

Energy Technology Data Exchange (ETDEWEB)

Hauth, E.A.; Forsting, M. [Inst. fuer Diagnostische und Interventionelle Radiologie und Neuroradiologie, Universitaetsklinik Essen (Germany); Jansen, C.; Drescher, R.; Mathias, K. [Radiologische Klinik, Klinikum Dortmund (Germany); Schwarz, M. [Neurologische Klinik, Klinikum Dortmund (Germany); Christmann, A. [Fachbereich Statistik, Univ. Dortmund (Germany); Jaeger, H. [Radiologische Klinik, Klinikum Dortmund (Germany); Marien-Hospital Wesel, Praxis fuer Radiologie, Neuroradiologie and Nuklearmedizin (Germany)

2006-08-15

Purpose: the purpose of this prospective study was to determine the restenosis grade, the intima hyperplasia and the stent expansion via angiographic follow-up six months after carotid artery stenting. Materials and methods: in 100 patients, angiographic follow-up was performed 5.9 months (range: 2.9 - 11.4 months) after carotid artery stenting. The restenosis grade, the intima hyperplasia and the stent expansion were measured by selective angiography of the treated carotid artery. Results: the mean restenosis grade was 16% (range: 0 - 78%). In 6 of 100 patients (6%), a restenosis grade of > 50% was measured. In 4 patients the restenosis grade was 50 - 70%. In 2 patients the restenosis grade was > 70%. In 91 of 100 patients (91%), the restenosis was localized in the former area of stenosis of the carotid artery, and in 9 of 100 patients (9%), the restenosis was localized in the cranial stent end. The mean grade of intima hyperplasia was 31% (range: 2 - 70%). The mean increase in stent expansion at the time of follow-up was 10% (range: 0 - 59%). No correlation was able to be determined between the grade of stenosis and the grade of restenosis (rho = 0,017, range: -0.180 - 0.213), between the grade of residual stenosis and the grade of restenosis (rho = 0,257, range: 0.064 - 0.431) and between intima hyperplasia and the grade of restenosis (rho = 0,476, range: 0.309 - 0.615). Conclusions: carotid artery stenting is associated with a low incidence of high-grade restenosis 6 months after an intervention. The intima hyperplasia, which can be observed in each Wallstent, is partly compensated by the expansion of the self-expandable stent. Without a correlation between the grade of residual stenosis and the grade of restenosis, low-grade residual stenosis can be accepted. Therefore, we recommend undersized postdilation of the Wallstent. (orig.)

Comprehensive embryo testing. Experts' opinions regarding future directions: an expert panel study on comprehensive embryo testing.

Science.gov (United States)

Hens, Kristien; Dondorp, Wybo J; Geraedts, Joep P M; de Wert, Guido M

2013-05-01

four Western Europe countries. As willingness to participate in this study may be connected with expectations regarding the pace and direction of future developments, selection bias cannot be excluded. The introduction of comprehensive screening techniques in embryo testing calls for further ethical reflection that is grounded in empirical work. Specifically, there is a need for studies querying the opinions of infertile couples undergoing IVF/PGS regarding the desirability of embryo screening beyond aneuploidy. This research was supported by the CSG, Centre for Society and Life Sciences (project number: 70.1.074). The authors declare no conflict of interest. N/A.

Quantification of myocardial area at risk in the absence of collateral flow: the validation of angiographic scores by myocardial perfusion single-photon emission computed tomography.

Science.gov (United States)

Rodríguez-Palomares, José F; Alonso, Albert; Martí, Gerard; Aguadé-Bruix, Santiago; González-Alujas, M T; Romero-Farina, Guillermo; Candell-Riera, Jaume; García del Blanco, Bruno; Evangelista, Artur; García-Dorado, David

2013-02-01

Our study aimed to compare the area at risk (AAR) determined by single-photon emission computed tomography (SPECT) with the Bypass Angioplasty Revascularization Investigation (BARI) and modified Alberta Provincial Project for Outcome Assessment in Coronary Heart Disease (APPROACH) angiographic scores in the setting of patients undergoing coronary angioplasty for either unstable angina or an STEMI. Radionuclide myocardial perfusion imaging prior to reperfusion has classically been the most widely practised technique for assessing the AAR and has been successfully used to compare the efficacy of various reperfusion strategies in patients with an ST-segment elevation myocardial infarction (STEMI). The BARI and modified APPROACH scores are angiographic methods widely used to provide a rapid estimation of the AAR; however, they have not been directly validated with myocardial perfusion single-photon emission computed tomography (SPECT). Fifty-five patients with no previous myocardial infarction who underwent coronary angioplasty for single-vessel disease (unstable angina: n = 25 or an STEMI: n = 30) with no evidence of collaterals (Rentrop Collateral Score collateral flow, BARI and APPROACH scores constitute valid methods for AAR estimation in current clinical practice, with more accurate results when used for the LAD territory; both are useful not only in STEMI patients but also in patients with unstable angina.

Correlation between scatter radiation dose at height of operator's eye and dose to patient for different angiographic projections

International Nuclear Information System (INIS)

Leyton, Fernando; Nogueira, Maria S.; Gubolino, Luiz A.; Pivetta, Makyson R.; Ubeda, Carlos

2016-01-01

Studies have reported cases of radiation-induced cataract among cardiology professionals. In view of the evidence of epidemiological studies, the ICRP recommends a new threshold for opacities and a new radiation dose to eye lens limit of 20 mSv per year for occupational exposure. The aim of this paper is to report scattered radiation doses at the height of the operator's eye in an interventional cardiology facility without considering radiation protection devices and to correlate these values with different angiographic projections and operational modes. Measurements were taken in a cardiac laboratory with an angiography X-ray system equipped with flat-panel detector. PMMA plates of 30×30×5 cm were used with a thickness of 20 cm. Measurements were taken in two fluoroscopy modes (low and normal, 15 pulses/s) and in cine mode (15 frames/s). Four angiographic projections were used: anterior posterior; lateral; left anterior oblique caudal (spider); and left anterior oblique cranial, with a cardiac protocol for patients weighing between 70 and 90 kg. Measurements of phantom entrance dose rate and scatter dose rate were performed with two Unfors Xi plus detectors. The detector measuring scatter radiation was positioned at the usual distance of the cardiologist's eyes during working conditions. There is a good linear correlation between the kerma area product and scatter dose at the lens. Experimental correlation factors of 2.3, 12.0, 12.2 and 17.6 μSv/Gy cm2 were found for different projections. PMMA entrance dose rates for low and medium fluoroscopy and cine modes were 13, 39 and 282 mGy/min, respectively, for AP projection. - Highlights: • A method is presented to estimate the scatter radiation dose at operator eye height. • The method allows estimating scatter radiation dose measuring ambient dose equivalent. • Operator could exceed threshold for lens opacities if protection tools are not used. • There is a good linear correlation between kerma

Contrast-enhanced three-dimensional magnetic resonance angiography of the aorta and its branches. Clinical applications for a new angiographic technique

International Nuclear Information System (INIS)

Dolz, J. L.; Vilanova, J. C.; Huguet, M.; Delgado, E.; Baquero, M.; Blanch, A.; Aldoma, J.; Capdevila, A.

1999-01-01

Magnetic resonance angiography (MRA) for the study of the aorta has developed at an impressive rate in recent years. It is now possible to evaluate the aorta and its branches by means of magnetic resonance (MR) following administration via peripheral vein of a paramagnetic contrast agent. The approach is similar to that of conventional arteriography, but without the risk associated with iodinated contrast media or invasive arterial catheterization. The technique involves the use of a sequence of ultrafast three-dimensional gradient-echo pulses acquired during apnea. This process enables angiographic or volumetric visualization in the desired plane. The objective of the present report is to describe the technique and demonstrate its many clinical applications. (Author) 23 refs

Prognostic value of Angiographic Perfusion Score (APS) following percutaneous interventions in acute coronary syndromes.

Science.gov (United States)

Narain, V S; Fischer, L; Puri, A; Sethi, R; Dwivedi, S K

2013-01-01

Identifying reperfusion and predicting post procedure risk is important following Percutaneous Coronary Interventions (PCI). An Angiographic Perfusion Score (APS) combining TIMI flow (TFG) and myocardial perfusion (TMPG) grades before and after PCI can accurately measure both epicardial and myocardial perfusion and predict Major Adverse Cardiac Events (MACE). APS was calculated in 226 (88 ST elevation Myocardial Infarction (STEMI) and 138 Non STEMI) patients. Maximum score being 12, reperfusion was defined as failed: 0-3, partial: 4-9, and full APS: 10-12. Thirty day MACE were observed. APS identified reperfusion significantly more than TMPG alone (STEMI: 50.6% vs 11.8% (p APS group (1.8% vs 22.5%) (p APS detects more low risk reperfused patients, post PCI. Copyright © 2012. Published by Elsevier B.V.

Quantification of myocardium at risk in ST- elevation myocardial infarction: a comparison of contrast-enhanced steady-state free precession cine cardiovascular magnetic resonance with coronary angiographic jeopardy scores.

Science.gov (United States)

De Palma, Rodney; Sörensson, Peder; Verouhis, Dinos; Pernow, John; Saleh, Nawzad

2017-07-27

Clinical outcome following acute myocardial infarction is predicted by final infarct size evaluated in relation to left ventricular myocardium at risk (MaR). Contrast-enhanced steady-state free precession (CE-SSFP) cardiovascular magnetic resonance imaging (CMR) is not widely used for assessing MaR. Evidence of its utility compared to traditional assessment methods and as a surrogate for clinical outcome is needed. Retrospective analysis within a study evaluating post-conditioning during ST elevation myocardial infarction (STEMI) treated with coronary intervention (n = 78). CE-SSFP post-infarction was compared with angiographic jeopardy methods. Differences and variability between CMR and angiographic methods using Bland-Altman analyses were evaluated. Clinical outcomes were compared to MaR and extent of infarction. MaR showed correlation between CE-SSFP, and both BARI and APPROACH scores of 0.83 (p < 0.0001) and 0.84 (p < 0.0001) respectively. Bias between CE-SSFP and BARI was 1.1% (agreement limits -11.4 to +9.1). Bias between CE-SSFP and APPROACH was 1.2% (agreement limits -13 to +10.5). Inter-observer variability for the BARI score was 0.56 ± 2.9; 0.42 ± 2.1 for the APPROACH score; -1.4 ± 3.1% for CE-SSFP. Intra-observer variability was 0.15 ± 1.85 for the BARI score; for the APPROACH score 0.19 ± 1.6; and for CE-SSFP -0.58 ± 2.9%. Quantification of MaR with CE-SSFP imaging following STEMI shows high correlation and low bias compared with angiographic scoring and supports its use as a reliable and practical method to determine myocardial salvage in this patient population. Clinical trial registration information for the parent clinical trial: Karolinska Clinical Trial Registration (2008) Unique identifier: CT20080014. Registered 04 th January 2008.

[Evaluation of fundus autofluorescence in hereditary retinal diseases using Heidelberg Retina Angiograph2].

Science.gov (United States)

Côco, Monique; Baba, Natalia Tamie; Sallum, Juliana Maria Ferraz

2007-01-01

To define characteristics of the fundus autofluorescence examination, verifying usefulness in the diagnosis and care of hereditary retinal diseases. 28 patients, adults, divided equally into four groups with diagnoses of Stargardt macular dystrophy, cone dystrophy, retinitis pigmentosa and healthy volunteers for the establishment of the normality pattern. An average of nine images with the filter for fluorescein angiography was obtained for the formation of the image autofluorescence using Heidelberg Retina Angiograph2. The images of each group of patients were analyzed to verify common characteristics. The fundus autofluorescence of healthy volunteers showed the foveal area darker than the surrounding retina. The images of Stargardt macular dystrophy, in general, presented an oval central lesion, with reduced autofluorescence. The main alterations of the autofluorescence in patients with cone dystrophy were reduced foveal autofluorescence with a parafoveal ring of increased autofluorescence. In general, the images of retinitis pigmentosa showed outlying pigments with reduced autofluorescence, and of the foveal area, in some cases disorganization or reduced autofluorescence. The study showed the existence of patterns of fundus autofluorescence in the hereditary retinal diseases that allow the diagnosis and better interpretation of the pathogenesis of these diseases.

78 FR 36753 - North Atlantic Coast Comprehensive Study

Science.gov (United States)

2013-06-19

... Disaster Relief Appropriations Act, Public Law 113-2, are to (1) reduce flood risk to vulnerable coastal... measure. The Comprehensive Study will also include storm suite modeling, coastal GIS analyses, economic...

The Reading Comprehension Strategies of Second Language Learners: A Spanish-English Study

Science.gov (United States)

Acosta Caballero, Karen Anelice

2012-01-01

Reading comprehension of school-aged students is an important topic of research; however, research on the reading comprehension of adult foreign/second language learners whose first language is English is limited, especially studies investigating the reading comprehension strategies that readers of different proficiency levels use when they…

Aspects of open-flavour mesons in a comprehensive DSBSE study

Energy Technology Data Exchange (ETDEWEB)

Hilger, T. [University of Graz, NAWI Graz, Institute of Physics, Graz (Austria); Austrian Academy of Sciences, Institute of High Energy Physics, Vienna (Austria); Gomez-Rocha, M. [ECT*, Villazzano (Trento) (Italy); Krassnigg, A. [University of Graz, NAWI Graz, Institute of Physics, Graz (Austria); Lucha, W. [Austrian Academy of Sciences, Institute of High Energy Physics, Vienna (Austria)

2017-10-15

Open-flavour meson studies are the necessary completion to any comprehensive investigation of quarkonia. We extend recent studies of quarkonia in the Dyson-Schwinger-Bethe-Salpeter equation approach to explore their results for all possible flavour combinations. Within the inherent limitations of the setup, we present the most comprehensive results for meson masses and leptonic decay constants currently available and put them in perspective with respect to experiment and other approaches. (orig.)

Comprehensive Stuttering Treatment for Adolescents: A Case Study.

Science.gov (United States)

Coleman, Craig E

2018-01-09

This article will focus on a hypothetical case study to highlight comprehensive assessment and treatment for adolescent children who stutter. Assessment and treatment are laid out with a literature review utilizing the components of the International Classification of Functioning, Disability and Health model. Specific assessment and treatment strategies and approaches are discussed. Using the International Classification of Functioning, Disability and Health model can help guide clinicians through the assessment and treatment process to ensure that all areas of stuttering are considered. Comprehensive assessment and treatment helps clinicians address all relevant elements of a stuttering disorder, rather than focusing exclusively on reducing speech disruptions.

Proverb comprehension in context: a developmental study with children and adolescents.

Science.gov (United States)

Nippold, M A; Martin, S A; Erskine, B J

1988-03-01

Although previous studies have reported that proverb comprehension remains quite literal before adolescence, the results of the present study indicated that fourth graders performed well on a proverb comprehension task involving contextual information and a written multiple choice format. It was also found that performance on the proverb task steadily improved at least through the eighth grade and was significantly correlated to performance on a perceptual analogical reasoning task. The study contributes to the small but growing body of information concerning language development during the preadolescent and adolescent years and may have some important implications for the assessment of youngsters of this age range who have comprehension deficits that are troublesome, yet difficult to document.

Clinical and angiographic profile of patients with markedly elevated coronary calcium scores (≥1000) detected by electron beam computed tomography

International Nuclear Information System (INIS)

Almeda, Francis Q.; Shah, Rima; Senter, Shaun; Kason, Thomas T.; Haynie, Justin; Calvin, James E.; Kavinsky, Clifford J.; Snell, R. Jeffrey; Schaer, Gary L.; McLaughlin, Vallerie V.

2004-01-01

Objective: The objective of this study was to determine the clinical and angiographic profile of patients with extremely high coronary artery calcium scores (CACS; ≥1000) by electron beam computed tomography (EBCT). Methods: All patients at Rush University Medical Center who had a calcium score ≥1000 and a coronary angiogram performed from 1997 to 2002 were identified using a prospectively collected database. The baseline demographics, symptom status, and degree of coronary stenosis by angiography and subsequent rate of coronary intervention were compared with that of patients with calcium scores <1000. Results: The clinical and angiographic profile of patients with severe coronary calcification, detected by EBCT, revealed that patients with scores ≥1000 had a significantly higher prevalence of coronary stenosis ≥50% compared with patients with scores <1000 (97% vs. 57%, P<.001). The group with CACS ≥1000 was more likely to be male (90% vs. 75%, P=.027) and was older (64±8 vs. 59±10, P=.001) compared with the group with less severe calcification. Although there was a significantly higher rate of luminal stenosis detected by coronary angiography in the cohort with CACS ≥1000, there was no difference in subsequent percutaneous coronary intervention (PCI) and utilization of intracoronary stents between the two groups. Conclusions: A markedly elevated coronary calcium score (≥1000) is correlated with increasing age and is associated with an increased likelihood of coronary stenosis ≥50%. However, the decision to perform coronary angiography in patients with severe coronary calcification should not be based solely on these findings, but should remain primarily dependent on the degree of ischemia detected by clinical and functional assessment

Agreement between clinical estimation and a new quantitative analysis by Photoshop software in fundus and angiographic image variables.

Science.gov (United States)

Ramezani, Alireza; Ahmadieh, Hamid; Azarmina, Mohsen; Soheilian, Masoud; Dehghan, Mohammad H; Mohebbi, Mohammad R

2009-12-01

To evaluate the validity of a new method for the quantitative analysis of fundus or angiographic images using Photoshop 7.0 (Adobe, USA) software by comparing with clinical evaluation. Four hundred and eighteen fundus and angiographic images of diabetic patients were evaluated by three retina specialists and then by computing using Photoshop 7.0 software. Four variables were selected for comparison: amount of hard exudates (HE) on color pictures, amount of HE on red-free pictures, severity of leakage, and the size of the foveal avascular zone (FAZ). The coefficient of agreement (Kappa) between the two methods in the amount of HE on color and red-free photographs were 85% (0.69) and 79% (0.59), respectively. The agreement for severity of leakage was 72% (0.46). In the two methods for the evaluation of the FAZ size using the magic and lasso software tools, the agreement was 54% (0.09) and 89% (0.77), respectively. Agreement in the estimation of the FAZ size by the lasso magnetic tool was excellent and was almost as good in the quantification of HE on color and on red-free images. Considering the agreement of this new technique for the measurement of variables in fundus images using Photoshop software with the clinical evaluation, this method seems to have sufficient validity to be used for the quantitative analysis of HE, leakage, and FAZ size on the angiograms of diabetic patients.

Absence of accelerated atherosclerotic disease progression after intracoronary infusion of bone marrow derived mononuclear cells in patients with acute myocardial infarction--angiographic and intravascular ultrasound--results from the TErapia Celular Aplicada al Miocardio Pilot study.

Science.gov (United States)

Arnold, Roman; Villa, Adolfo; Gutiérrez, Hipólito; Sánchez, Pedro L; Gimeno, Federico; Fernández, Maria E; Gutiérrez, Oliver; Mota, Pedro; Sánchez, Ana; García-Frade, Javier; Fernández-Avilés, Francisco; San Román, Jose A

2010-06-01

We tried to evaluate a putative negative effect on coronary atherosclerosis in patients receiving intracoronary infusion of unfractionated bone marrow mononuclear cells (BMMC) following an acute ST-elevation myocardial infarction. Peripheral blood mononuclear cells or enriched CD133(+) BMMC have been associated with accelerated atherosclerosis of the distal segment of the infarct related artery (IRA). Thirty-seven patients with ST-elevation myocardial infarction from the TECAM pilot study underwent intracoronary infusion of autologous BMMC 9 +/- 3.1 days after onset of symptoms. We compared angiographic changes from baseline to 9 months of follow-up in the distal non-stented segment of the IRA, as well as in the contralateral coronary artery, with a matched control group. A subgroup of 15 treated patients underwent additional IVUS within the distal segment of the IRA. No difference between stem cell and control group were found regarding changes in minimum lumen diameter (0.006 +/- 0.42 vs 0.06 +/- 0.41 mm, P = ns) and the percentage of stenosis (-2.68 +/- 12.33% vs -1.78 +/- 8.75%, P = ns) at follow-up. Likewise, no differences were seen regarding changes in the contralateral artery (minimum lumen diameter -0.004 +/- 0.54 mm vs -0.06 +/- 0.35 mm, P = ns). In the intravascular ultrasound substudy, no changes were demonstrated comparing baseline versus follow-up in maximum area stenosis and plaque volume. In this pilot study, analysis of a subgroup of patients found that intracoronary injection of unfractionated BMMC in patients with acute ST-elevation myocardial infarction was not associated with accelerated atherosclerosis progression at mid term. Prospective, randomised studies in large cohorts with long-term angiographic and intravascular ultrasound follow-up are necessary to determine the safety of this therapy. Copyright 2010 Mosby, Inc. All rights reserved.

Invaded depth of extrahepatic bile duct cancer diagnosed on angiographic CT during late contrast enhancement

International Nuclear Information System (INIS)

Kikuyama, Masataka; Sasada, Yuzo; Koide, Shigeki; Hirai, Ritsuko; Oota, Yuji

2006-01-01

Thirteen patients with extrahepatic bile duct cancer were evaluated for enhancement pattern and tumor feature during late contrast enhancement on angiographic CT (AG-CT), performed before surgery. Eleven patients with late contrast enhancement had advanced cancers with invasion over the subserosal layer. Eight of these patients whose cancer had an irregular outer layer had invasion over the serosal layer (≥panc 1 b, General Rules for Surgical and Pathological Studies on Cancer of the Biliary Tract, Japanese Society of Biliary Surgery). Seven of the 13 patients had intra-pancreatic bile duct cancer. Among them, five had an irregular outer layer of the intra-pancreatic bile duct cancer; one of three with a wall thickness under 5 mm on AG-CT had panc 1 b invasion, and the other two had panc 2 (General Rules for Surgical and Pathological Studies on Cancer of the Biliary Tract, Japanese Society of Biliary Surgery) invasion. Two with a wall thickness over 5 mm on AG-CT had panc 2 invasion. These results suggest that late contrast enhancement on AG-CT is effective for diagnosing the depth of tumor invasion of the bile duct. (author)

Percutaneous vertebroplasty with a high-quality rotational angiographic unit

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Pedicelli, Alessandro [Department of Bioimaging and Radiological Sciences, Catholic University of Sacred Heart, Policl. A.Gemelli, l.go Gemelli 1, 00168 Rome (Italy)], E-mail: apedicelli@rm.unicatt.it; Rollo, Massimo [Department of Bioimaging and Radiological Sciences, Catholic University of Sacred Heart, Policl. A.Gemelli, l.go Gemelli 1, 00168 Rome (Italy)], E-mail: mrollo@rm.unicatt.it; Piano, Mariangela [Department of Bioimaging and Radiological Sciences, Catholic University of Sacred Heart, Policl. A.Gemelli, l.go Gemelli 1, 00168 Rome (Italy)], E-mail: mariangela.piano@gmail.com; Re, Thomas J. [Department of Bioimaging and Radiological Sciences, Catholic University of Sacred Heart, Policl. A.Gemelli, l.go Gemelli 1, 00168 Rome (Italy)], E-mail: tomjre@gmail.com; Cipriani, Maria C. [Department of Gerontology, Catholic University of Sacred Heart, Policl. A.Gemelli, l.go Gemelli 1, 00168 Rome (Italy)], E-mail: alexped@yahoo.com; Colosimo, Cesare [Department of Bioimaging and Radiological Sciences, Catholic University of Sacred Heart, Policl. A.Gemelli, l.go Gemelli 1, 00168 Rome (Italy)], E-mail: colosimo@rm.unicatt.it; Bonomo, Lorenzo [Department of Bioimaging and Radiological Sciences, Catholic University of Sacred Heart, Policl. A.Gemelli, l.go Gemelli 1, 00168 Rome (Italy)], E-mail: lbonomo@rm.unicatt.it

2009-02-15

We evaluated the reliability of a rotational angiographic unit (RA) with flat-panel detector as a single technique to guide percutaneous vertebroplasty (PVP) and for post-procedure assessment by 2D and 3D reformatted images. Fifty-five consecutive patients (104 vertebral bodies) were treated under RA fluoroscopy. Rotational acquisitions with 2D and 3D reconstruction were obtained in all patients for immediate post-procedure assessment. In complex cases, this technique was also used to evaluate the needle position during the procedure. All patients underwent CT scan after the procedure. RA and CT findings were compared. In all cases, a safe trans-pedicular access and an accurate control of the bone-cement injection were successfully performed with high-quality fluoroscopy, even at the thoracic levels and in case of vertebra plana. 2D and 3D rotational reconstructions permitted CT-like images that clearly showed needle position and were similar to CT findings in depicting intrasomatic implant-distribution. RA detected 40 cement leakages compared to 42 demonstrated by CT and showed overall 95% sensitivity and 100% specificity compared to CT for final post-procedure assessment. Our preliminary results suggest that high-quality RA is reliable and safe as a single technique for PVP guidance, control and post-procedure assessment. It permits fast and cost-effective procedures avoiding multi-modality imaging.

Angiographic assessment of initial balloon angioplasty results.

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Gardiner, Geoffrey A; Sullivan, Kevin L; Halpern, Ethan J; Parker, Laurence; Beck, Margaret; Bonn, Joseph; Levin, David C

2004-10-01

To determine the influence of three factors involved in the angiographic assessment of balloon angioplasty-interobserver variability, operator bias, and the definition used to determine success-on the primary (technical) results of angioplasty in the peripheral arteries. Percent stenosis in 107 lesions in lower-extremity arteries was graded by three independent, experienced vascular radiologists ("observers") before and after balloon angioplasty and their estimates were compared with the initial interpretations reported by the physician performing the procedure ("operator") and an automated quantitative computer analysis. Observer variability was measured with use of intraclass correlation coefficients and SD. Differences among the operator, observers, and the computer were analyzed with use of the Wilcoxon signed-rank test and analysis of variance. For each evaluator, the results in this series of lesions were interpreted with three different definitions of success. Estimation of residual stenosis varied by an average range of 22.76% with an average SD of 8.99. The intraclass correlation coefficients averaged 0.59 for residual stenosis after angioplasty for the three observers but decreased to 0.36 when the operator was included as the fourth evaluator. There was good to very good agreement among the three independent observers and the computer, but poor correlation with the operator (P definition of success was used. Significant differences among the operator, the three observers, and the computer were not present when the definition of success was based on less than 50% residual stenosis. Observer variability and bias in the subjective evaluation of peripheral angioplasty can have a significant influence on the reported initial success rates. This effect can be largely eliminated with the use of residual stenosis of less than 50% to define success. Otherwise, meaningful evaluation of angioplasty results will require independent panels of evaluators or

Hepatic Rupture Caused by Hemolysis, Elevated Liver Enzyme, and Low Platelet Count Syndrome: A Case Report with Computed Tomographic and Conventional Angiographic Findings

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Lee, Cheong Bok; Ahn, Jae Hong; Choi, Soo Jung; Lee, Jong Hyeog; Park, Man Soo; Jung, Seung Mun; Ryu, Dae Sik [Dept. of Radiology, Asan Foundation, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung (Korea, Republic of)

2013-03-15

The authors recently obtained successful clinical outcome after embolization of the hepatic artery and right inferior phrenic artery in a pregnant patient with hemolysis, elevated liver enzyme, and low platelet count (HELLP) syndrome causing hepatic rupture. We report the computed tomographic and conventional angiographic findings in a case of HELLP syndrome, resulting in hepatic infarction and rupture with active bleeding.

Angiographic aspect of the distal forelimb in donkeys (Equus asinus used for animal traction

Directory of Open Access Journals (Sweden)

Maria Angélica Miglino

2009-12-01

Full Text Available The asinine species was originated thousands of years ago from the same branch of domestic equine. Asinines have been undergoing a great adaptation resulting in different characteristics observed in their populations around the world. In the northeastern region of Brazil, they play an essential role in the economy of local families. Due to a large number of locomotor disorders and a lack of professional care for these animals, a radiographic study of the distal forelimb region of the asinine was carried out in order to gather information for the improvement of clinical and surgical practices in this species, and to explain their low susceptibility to locomotor disorders compared to that of the domestic equine. The angiographic examination revealed the main arterial vessels committed to the blood supply of the forelimbs in these animals, providing evidence of the vascular pattern of the median and palmar common digital arteries, which originated a great number of collateral branches, mainly to the distal phalanx. The distal forelimbs in donkeys have shown great vascular anastomosis, promoting additional blood supply to the deep endosteum and periosteum regions, probably as a response to the physical activity developed by these animals.

Comparison of angiographic, gammagraphic, and histological data in orbital tumours: concerning 13 observations

International Nuclear Information System (INIS)

Emery, M.T.

1976-01-01

The aim of this work is to compare the value of gammagraphic and angiographic examinations in intra-orbital expansive processes and to hole for a histological explanation when the two examinations disagree. All the gammagraphs used were obtained with technetium 99m-labelled ferrous ascorbate. Orbital gammagraphy requires a radioelement combining the advantages of easily detectable radioactivity and fast elimination from healthy tissues while keeping a strong tumoral uptake. Sup(99m)Tc-labelled ferrous ascorbate fulfils these conditions. Technetium 99m, perfectly safe because of its short half-life and low radiation energy, allows the scintigraphic detection of expansive processes. By its association with ferrous ascorbate, which has a very high kidney and plasma clearance rate, the vascular background is reduced considerably and the relative radiotracer concentration in the diseased area increased (the background is due to fixation of the radioelement in the facial and orbital muscles, the mucous membranes of the nose and sinus and the vein sinuses at the base of the skull). The complex used in this study is obtained from 40mg ferrous ascorbate to which are added 1ml Thris buffer at pH 7.85 and 5ml 99mTc pertechnetate solution. 10 to 15 microcuries are injected intraveinously or absorbed parenterally [fr

Prediction of optimal deployment projection for transcatheter aortic valve replacement: angiographic 3-dimensional reconstruction of the aortic root versus multidetector computed tomography.

OpenAIRE

Binder Ronald K; Leipsic Jonathon; Wood David; Moore Teri; Toggweiler Stefan; Willson Alex; Gurvitch Ronen; Freeman Melanie; Webb John G

2012-01-01

BACKGROUND Identifying the optimal fluoroscopic projection of the aortic valve is important for successful transcatheter aortic valve replacement (TAVR). Various imaging modalities including multidetector computed tomography (MDCT) have been proposed for prediction of the optimal deployment projection. We evaluated a method that provides 3 dimensional angiographic reconstructions (3DA) of the aortic root for prediction of the optimal deployment angle and compared it with MDCT. METHODS AND RES...

Comprehensive Stuttering Treatment or Adolescents: A Case Study

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Coleman, Craig E.

2018-01-01

Purpose: This article will focus on a hypothetical case study to highlight comprehensive assessment and treatment for adolescent children who stutter. Method: Assessment and treatment are laid out with a literature review utilizing the components of the International Classification of Functioning, Disability and Health model. Specific assessment…

High-Resolution CT and Angiographic Evaluation of NexStent Wall Adaptation

International Nuclear Information System (INIS)

Nemes, Balazs; Lukacs, Levente; Balazs, Gyoergy; Dosa, Edit; Berczi, Viktor; Huettl, Kalman

2009-01-01

Carotid stenting is a minimally invasive treatment for extracranial carotid artery stenosis. Stent design may affect technical success and complications in a certain subgroup of patients. We examined the wall adaptability of a new closed-cell carotid stent (NexStent), which has a unique rolled sheet design. Forty-one patients had 42 carotid arteries treated with angioplasty and stenting for internal carotid artery stenosis. The mean patient age was 65 ± 10 years. All patients underwent high-resolution computed tomographic angiography after the stent implantation. Data analysis included pre- and postprocedural stenosis, procedure complications, plaque calcification, and stent apposition. We reviewed the angiographic and computed tomographic images for plaque coverage and stent expansion. All procedures were technically successful. Mean stenosis was reduced from 84 ± 8% before the procedure to 15.7 ± 7% after stenting. Two patients experienced transient ischemic attack; one patient had bradycardia and hypotension. Stent induced kinking was observed in one case. Good plaque coverage and proper overlapping of the rolled sheet was achieved in all cases. There was weak correlation between the residual stenosis and the amount of calcification. The stent provides adequate expansion and adaptation to the tapering anatomy of the bifurcation.

Local organ dose conversion coefficients for angiographic examinations of coronary arteries

International Nuclear Information System (INIS)

Schlattl, H; Zankl, M; Hausleiter, J; Hoeschen, C

2007-01-01

New organ dose conversion coefficients for coronary angiographic interventions are presented, as well as dose distributions and resulting maximal local dose conversion coefficients in the relevant organs. For the Monte Carlo based simulations, voxel models of the human anatomy were employed which represent the average Caucasian adult man and woman as defined by the International Commission on Radiological Protection. In the 21 investigated projections, the mean organ dose conversion coefficients vary from a few 0.01 to 2 mGy(Gy cm 2 ) -1 , depending on the projections. However, especially in portions of the lungs and the active bone marrow, the conversion coefficients can locally amount up to 10 mGy(Gy cm 2 ) -1 , which is half the average conversion coefficient of the skin at the field entrance. In addition to the dose conversion coefficients, the dependence of the patient dose on the projection has been estimated. It could be shown that the patient doses are highest for left anterior oblique views with strong caudal or cranial orientation. Nevertheless, for a large range of image-intensifier positions no significant dose differences could be found

A Study on Strategies for Teaching Speaking and Reading Comprehension Skills

OpenAIRE

AHMAD; Prof. Dr.I Ketut Seken,MA; Dra. Luh Putu Artini, MA., Ph.D

2013-01-01

The central intention of this study was to analyze the English teachers’ strategies in teaching speaking and reading comprehension skills in SMPN 1 Selong. It was conducted to get detailed information about the students’ responses toward their teachers’ strategies in teaching speaking and reading comprehension skills. This study employed a qualitative research design. Necessary data were gathered using open-ended question, classroom observation, interview, and questionnaire. The result ...

Endovascular image-guided treatment of in-vivo model aneurysms with asymmetric vascular stents (AVS): evaluation with time-density curve angiographic analysis and histology.

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Dohatcu, A; Ionita, C N; Paciorek, A; Bednarek, D R; Hoffmann, K R; Rudin, S

2008-01-01

In this study, we compare the results obtained from Time-Density Curve (TDC) analysis of angiographic imaging sequences with histological evaluation for a rabbit aneurysm model treated with standard stents and new asymmetric vascular stents (AVS) placed by image-guided endovascular deployment. AVSs are stents having a low-porosity patch region designed to cover the aneurysm neck and occlude blood flow inside. To evaluate the AVSs, rabbits with elastase-induced aneurysm models (n=20) were divided into three groups: the first (n=10) was treated with an AVS, the second (n=5) with a non-patch standard coronary stent, and third was untreated as a control (n=5). We used TDC analysis to measure how much contrast media entered the aneurysm before and after treatment. TDCs track contrast-media-density changes as a function of time over the region of interest in x-ray DSA cine-sequences. After 28 days, the animals were sacrificed and the explanted specimens were histologically evaluated. The first group showed an average reduction of contrast flow into the aneurysm of 95% after treatment with an AVS with fully developed thrombus at 28 days follow-up. The rabbits treated with standard stents showed an increase in TDC residency time after treatment and partial-thrombogenesis. The untreated control aneurysms displayed no reduction in flow and were still patent at follow-up. The quantitative TDC analysis findings were confirmed by histological evaluation suggesting that the new AVS has great potential as a definitive treatment for cerebro-vascular aneurysms and that angiographic TDC analysis can provide in-vivo verification.

78 FR 61844 - North Atlantic Coast Comprehensive Study

Science.gov (United States)

2013-10-04

...: The U.S. Army Corps of Engineers (USACE) is requesting peer reviewed information that would be useful in the preparation of the North Atlantic Coast Comprehensive Study (Hurricane Sandy). The USACE is... information by electronic mail to: [email protected] . Please include your name and contact information in...

Angiographically demonstrated coronary collaterals predict residual viable myocardium in patients with chronic myocardial infarction. A regional metabolic study

International Nuclear Information System (INIS)

Fukai, Masumi; Ii, Masaaki; Nakakoji, Takahiro

2000-01-01

Angiographical demonstration of coronary collateral circulation may suggest the presence of residual viable myocardium. The development of coronary collaterals was judged according to Rentrop's classification in 37 patients with old anteroseptal myocardial infarction and 13 control patients with chest pain syndrome. The subjects with myocardial infarction were divided into 2 groups: 17 patients with the main branch of the left coronary artery clearly identified by collateral blood flow from the contralateral coronary artery [Coll (+) group, male/female 10/7, mean age 56.6 years] and 20 patients with obscure coronary trunk [Coll (-) group, male/female 16/4, mean age 54.9 years]. Thallium-201 myocardial scintigraphy and examination of local myocardial metabolism were carried out by measuring the flux of lactic acid under dipyridamole infusion load. Coronary stenosis of 99% or total occlusion was found in only 5 of 20 patients (25%) in the Coll (-) group but in 16 of 17 patients (94%) in the Coll (+) group (p<0.001). Redistribution of myocardial scintigraphy was found in 11 of 15 patients (73%) in the Coll (+) group, but only 3 of 18 patients (17%) in the Coll (-) group (p<0.01). The myocardial lactic acid extraction rate was -13.2±17.0% in the Coll (+) group, but 9.1±13.2% in the Coll (-) group (p<0.001). These results suggest that coronary collateral may contribute to minimizing the infarct area and to prediction of the presence of viable myocardium. (author)

QRAC-the-Code: a comprehension monitoring strategy for middle school social studies textbooks.

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Berkeley, Sheri; Riccomini, Paul J

2013-01-01

Requirements for reading and ascertaining information from text increase as students advance through the educational system, especially in content-rich classes; hence, monitoring comprehension is especially important. However, this is a particularly challenging skill for many students who struggle with reading comprehension, including students with learning disabilities. A randomized pre-post experimental design was employed to investigate the effectiveness of a comprehension monitoring strategy (QRAC-the-Code) for improving the reading comprehension of 323 students in grades 6 and 7 in inclusive social studies classes. Findings indicated that both general education students and students with learning disabilities who were taught a simple comprehension monitoring strategy improved their comprehension of textbook content compared to students who read independently and noted important points. In addition, students in the comprehension monitoring condition reported using more reading strategies after the intervention. Implications for research and practice are discussed.

Evaluation of the angiographic findings for extrahepatic arterial supply to primary hepatic cancer and interventional therapy

International Nuclear Information System (INIS)

Wang Weiyu; Lv Weifu; Hou Changlong; Zhang Xingming; Zhang Zhengfeng; Lu Dong; Gao Zonggen

2007-01-01

Objective: To study the angiographic characteristics of extrahepatic arterial supply for primary hepatic cancer (PHC)and the significance of interventional therapy. Methods: 32 cases of primary. hepatic cancer were undertaken routine celiac arterial angiography and explored the extrahepatic arterial supply for the tumor, then followed by superselective transcatheter arterial chemoembolization (TACE). Results: 37 extrahepatic feeding arteries to hepatic cancers in 32 cases were found including 12 from superior mesenteric arteries(SMA), 9 right inferior phrenic arteries (RIPA), 1 left inferior phrenic arteries (LIPA), 2 pancreatic arterial arch, 1 right internal thoracic artery(RITA), 1 right intercostal artery(RICA), 6 left gastric arteries (LGA), 1 splenic artery, 2 omental arteries (OTA), 2 gastroduodenal arteries. The most common extrahepatic feeding arteries were originated from SMA and RIPA. The rest 33 were performed with superselective transcatheter arterial chemoembolization and the other 4 with only transcatheter arterial chemotherapeutic perfusion due to failure of superselective catheterization. Conclusion: The extrahepatic feeding artery is commonly seen with various kinds and also necessary for interventional treatment same as the primary ones for hepatic cancers. (authors)

Storybook Read-Alouds to Enhance Students’ Comprehension Skills in ESL Classrooms: A Case Study

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Ainon Omar

2015-06-01

Full Text Available The effectiveness of using storybooks during read-alouds to develop children’s comprehension skills as well as in understanding the story has been widely studied. The reading aloud strategy has also been proven through numerous researches to be the most highly recommended activity for encouraging language and literacy. The study identified the comprehension strategies used by the teachers during their read-aloud sessions, matched teachers’ current practices using the comprehension strategies to the identified practices for the approach, and obtained the teachers’ perceptions of their current practices of the comprehension strategies during reading aloud in their English language classrooms. The teachers’ comprehension strategies were matched with a research-based strategy for comprehending texts during read-alouds proposed by Whitehurst et al (1994. Three primary school English language teachers teaching in the rural schools participated in this study. Qualitative research methods were used in this study. Primary data was obtained through observations using an observation protocol; while secondary data was obtained through interviews from teachers. Findings from the study revealed that the three teachers employed a few of the comprehension strategies that were proposed by researchers in the field. The findings also indicate that the teachers utilized only the strategies that they thought were relevant to their teaching context and as such, proposed the need to provide teachers with knowledge on the best practices for conducting reading aloud to develop ESL students’ comprehension skills

Propensity score matched lesion-based comparison of long-term clinical and angiographic outcomes after placement of sirolimus (Cypher Bx Velocity) and paclitaxel (TAXUS Express)-eluting stents for de novo native coronary stenosis.

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Nakano, Yosuke; Ishikawa, Tetsuya; Hino, Shoryoku; Mutoh, Makoto

2014-04-01

Long-term clinical and angiographic outcomes after sirolimus (SES: Cypher Bx Velocity) and paclitaxel (PES: TAXUS Express)-eluting stent implantation were firstly compared in Japan. During PES-available period from May 2007 to February 2009, 1068 nonrandomized consecutive de novo native coronary lesions treated either with a PES (682 lesions) or SES were enrolled in this study, and a retrospective examination was conducted in April 2013. During that interval, the use ratio of drug-eluting stent (i.e. SES plus PES) was 94.2 %. By adjusting the baselines with a propensity score matching analysis produced 383 lesions in each arm, the incidence of the clinical endpoint (1500-day cardiac death, nonfatal recurrent myocardial infarction, and definite stent thrombosis) after placement of SES (2.1 %; mean follow-up, 1400 ± 290 days) was not significantly different from that in the PES group (2.6 %; 1394 ± 325 days, p = 0.637). SES did not relate to the clinical endpoint (hazard ratio 1.04; 95 % CI 0.29-3.76; p = 0.949). In the baseline-adjusted angiographic followed up lesions (n = 234 in each arm), the incidence of binary restenosis (percent diameter stenosis [%DS] >50 %) in the SES group (12.0 %; mean follow-up, 477 ± 281 days) was not significantly different from that in the PES group (14.5 %; 497 ± 341 days, p = 0.431). SES did not relate to binary restenosis (Odds ratio 0.73; 95 % CI 0.40-1.32; p = 0.295). In conclusion, the present propensity score matched lesion-based analysis firstly showed the statistical equivalent long-term clinical and angiographic outcomes after either SES or PES placement for de novo native coronary lesion in Japanese patients in a daily practice environment.

Clinical characteristics, angiographic profile and in hospital mortality in acute coronary syndrome patients in south indian population

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Rajni Sharma

2014-01-01

Full Text Available Aims: The aim was to study the clinical profile, risk factors prevalence, angiographic distribution, and severity of coronary artery stenosis in acute coronary syndrome (ACS patients of South Indian population. Materials and Methods: A total of 1562 patients of ACS were analyzed for various risk factors, angiographic pattern and severity of coronary heart disease, complications and in hospital mortality at Sri Jayadeva Institute of Cardiovascular Research and Sciences, Bengaluru, Karnataka, India. Results: Mean age of presentation was 54.71 ± 19.90 years. Majority were male 1242 (79.5% and rest were females. Most patients had ST elevation myocardial infarction (STEMI 995 (63.7% followed by unstable angina (UA 390 (25% and non-STEMI (NSTEMI 177 (11.3%. Risk factors; smoking was present in 770 (49.3%, hypertension in 628 (40.2%, diabetes in 578 (37%, and obesity in (29.64% patients. Angiography was done in 1443 (92.38% patients. left anterior descending was most commonly involved, left main (LM coronary artery was least common with near similar frequency of right coronary artery and left circumflex involvement among all three groups of ACS patients. Single-vessel disease was present in 168 (45.28% UA, 94 (56.29% NSTEMI and 468 (51.71% STEMI patients. Double-vessel disease was present in 67 (18.08% UA, 25 (14.97% NSTEMI and 172 (19.01% STEMI patients. Triple vessel disease was present in 28 (7.55% UA, 16 (9.58% NSTEMI, 72 (7.95% STEMI patients. LM disease was present in 12 (3.23% UA, 2 (1.19% NSTEMI and 9 (0.99% STEMI patients. Complications; ventricular septal rupture occurred in 3 (0.2%, free wall rupture in 2 (0.1%, cardiogenic shock in 45 (2.9%, severe mitral regurgitation in 3 (0.2%, complete heart block in 11 (0.7% patients. Total 124 (7.9% patients died in hospital after 2.1 ± 1.85 days of admission. Conclusion: STEMI was most common presentation. ACS occurred a decade earlier in comparison to Western population. Smoking was most prevalent

Ciclo Basico Polivalente (Basic Comprehensive Courses of Study).

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Boletin del Centro Nacional de Documentacion e Informacion Educativa, 1970

1970-01-01

This article discusses the creation of comprehensive secondary schools in Argentina to meet the diversified goals of the population in any given geographical region. The plan described here provides for the creation of several basic-study cycles within one school so that students may pursue courses in commercial, technical, and academic fields.…

Angiographic classification of patent ductus arteriosus and its clinical implications

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Qingqiao, Zhang; Shiliang, Jiang; Lianjun, Huang; Shihua, Zhao; Jian, Ling; Zhongying, Xu; Hong, Zheng; Ruolan, Xie; Ruping, Dai [Chinese Academy of Medical Sciences and Beijing Union Medical College, Beijing (China). Cardiovascular Inst. and Fuwai Hospital, Dept. of Radiology

2004-04-01

Objective: To study the angiographic appearance of patent ductus arteriosus (PDA) and provide information for clinical treatment. Methods: Between July 1994 and October 2002, 483 patients (142 male, 341 female) with isolated PDA underwent aortography before attempted transcatheter closure of PDA, the mean age was (14.6 {+-} 11.4) years (range 0.8 to 63 years). Left lateral aortography was performed in 482 patients. Among them, additional aortography in right anterior oblique 30 degree - 50 degree or left anterior oblique 60 degree - 80 degree (or plus caudal 20 degree) projection was performed in 6 and 4 patients, respectively. One patient with mirror-image dextrocardia underwent aortography in right lateral projection. Results: The configuration of PDA was classified into six types. Four hundred and twenty (87%) patients had funnel shape PDA, the mean minimum diameter of PDA was 4.2 {+-} 1.6 mm (range 1 to 15 mm). Three (0.6%) patients had window shape PDA, the diameters of PDA were 8.0 mm, 9.0 mm, and 9.0 mm, respectively. Thirty four (7.0%) patients had tubular shape PDA, the mean diameter of PDA was (5.4 {+-} 3.8) mm (range 0.8 to 20 mm). Eleven (2.3%) patients had rosary shape PDA, the mean minimum diameter of PDA was (2.1 {+-} 0.5) mm (range 1.0 to 3.7 mm). Ten (2.1%) patients had finger shape PDA, the mean minimum diameter of PDA was (1.5 {+-} 0.4) mm (range 1.0 to 3.0 mm). Five (1.0%) patients had irregular shape PDA, the minimum diameters of PDA were 1.2, 2.1, 3.2, 4.0, and 6.0 mm, respectively. Conclusion: The morphology of PDA varied considerably, and the awareness of these variations is helpful for clinical treatment.

Angiographic classification of patent ductus arteriosus and its clinical implications

International Nuclear Information System (INIS)

Zhang Qingqiao; Jiang Shiliang; Huang Lianjun; Zhao Shihua; Ling Jian; Xu Zhongying; Zheng Hong; Xie Ruolan; Dai Ruping

2004-01-01

Objective: To study the angiographic appearance of patent ductus arteriosus (PDA) and provide information for clinical treatment. Methods: Between July 1994 and October 2002, 483 patients (142 male, 341 female) with isolated PDA underwent aortography before attempted transcatheter closure of PDA, the mean age was (14.6 ± 11.4) years (range 0.8 to 63 years). Left lateral aortography was performed in 482 patients. Among them, additional aortography in right anterior oblique 30 degree - 50 degree or left anterior oblique 60 degree - 80 degree (or plus caudal 20 degree) projection was performed in 6 and 4 patients, respectively. One patient with mirror-image dextrocardia underwent aortography in right lateral projection. Results: The configuration of PDA was classified into six types. Four hundred and twenty (87%) patients had funnel shape PDA, the mean minimum diameter of PDA was 4.2 ± 1.6 mm (range 1 to 15 mm). Three (0.6%) patients had window shape PDA, the diameters of PDA were 8.0 mm, 9.0 mm, and 9.0 mm, respectively. Thirty four (7.0%) patients had tubular shape PDA, the mean diameter of PDA was (5.4 ± 3.8) mm (range 0.8 to 20 mm). Eleven (2.3%) patients had rosary shape PDA, the mean minimum diameter of PDA was (2.1 ± 0.5) mm (range 1.0 to 3.7 mm). Ten (2.1%) patients had finger shape PDA, the mean minimum diameter of PDA was (1.5 ± 0.4) mm (range 1.0 to 3.0 mm). Five (1.0%) patients had irregular shape PDA, the minimum diameters of PDA were 1.2, 2.1, 3.2, 4.0, and 6.0 mm, respectively. Conclusion: The morphology of PDA varied considerably, and the awareness of these variations is helpful for clinical treatment

Reciprocal Teaching and Emotional Intelligence: A Study of Iranian EFL Learners' Reading Comprehension

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Izadi, Mehri; Nowrouzi, Hossein

2016-01-01

The present study aimed at exploring the effect of reciprocal reading strategies instruction on reading comprehension of EFL learners. Emotional intelligence, another variable of interest, was assessed to indicate whether it plays a role in learners' comprehension. In a pre- and post-test study, forty-two learners went through a reciprocal reading…

The anterior choroidal artery syndrome. Pt. 2. CT and/or MR in angiographically verified cases

International Nuclear Information System (INIS)

Takahashi, S.; Ishii, K.; Matsumoto, K.; Higano, S.; Ishibashi, T.; Suzuki, M.; Sakamoto, K.

1994-01-01

We reviewed 12 cases of infarcts in the territory of the anterior choroidal artery (AChA) on CT and/or MRI. In each case vascular occlusion in the region was verified angiographically. Although the extent of the lesion on CT/MR images was variable, all were located on the axial images within an arcuate zone between the striatium anterolaterally and the thalamus posteromedially. The distribution of the lesions on mutiplanar MRI conformed well to the territory of the AChA demonstrated microangiographically. The variability of the extent of the infarcts may be explained by variations in the degree of occlusive changes in the AChA or the development of collateral circulation through anastomoses between the AChA and the posterior communicating and posterior cerebral arteries. The extent of the lesion appeared to be closely related to the degree of neurological deficit. (orig.)

Ovarian Artery: Angiographic Appearance, Embolization and Relevance to Uterine Fibroid Embolization

International Nuclear Information System (INIS)

Pelage, J.P.; Walker, W.J.; Le Dref, O.; Rymer, R.

2003-01-01

Purpose: To describe the angiographic appearance of the ovarian artery and its main variations that may be relevant to uterine fibroid embolization. Methods: The flush aortograms of 294 women who had been treated by uterine artery embolization for fibroids were reviewed. Significant arterial supply to the fibroid, and the origin and diameter of identified ovarian arteries were recorded. In patients with additional embolization of the ovarian artery, the follow-up evaluation also included hormonal levels and Doppler imaging of the ovaries. Results: A total of 75 ovarian arteries were identified in 59 women (bilaterally in 16 women and unilaterally in 43 women). All ovarian arteries originated from the aorta below the level of the renal arteries with a characteristic tortuous course. Fifteen women had at least one enlarged ovarian artery supplying the fibroids. Fourteen women (14/15, 93%) presented at least one of the following factors: prior pelvic surgery, tubo-ovarian pathology or large fundal fibroids. Conclusion: We advocate the use of flush aortography in women with prior tubo-ovarian pathology or surgery or in cases of large fundal fibroids. In the case of an ovarian artery supply to the fibroids, superselective catheterization and embolization of the ovarian artery should be considered

Percutaneous transluminal rotational atherectomy in the treatment of peripheral vascular disease using a transluminal endatherectomy catheter (TEC): Initial results and angiographic follow-up

International Nuclear Information System (INIS)

Rilinger, Norbert; Goerich, Johannes; Scharrer-Pamler, Reinhard; Vogel, Jochen; Tomczak, Reinhard; Merkle, Elmar; Sokiranski, Roman; Brambs, Hans-Juergen

1997-01-01

Purpose. To evaluate the clinical results of percutaneous transluminal rotational atherectomy in the treatment of peripheral vascular disease. Methods. Rotational atherectomy was performed in 39 patients aged 39-87 years (mean 66.6 years). A total of 71 lesions (43 stenoses and 28 occlusions) were treated in 40 limbs. Additional balloon angioplasty was required in 54% of lesions. Fifteen patients (37.5%) presented in Fontaine stage II, 10 patients (25%) in Fontaine stage III and 15 patients (37.5%) in Fontaine stage IV. Rotational atherectomy at 750 rpm was carried out over a 0.014-inch guidewire with continuous aspiration into a vacuum, bottle. Follow-up angiography and color flow Doppler examinations were performed in 22 patients (23 limbs) after a mean period of 6 months (range 2-14 months). Results. There was one primary technical failure. In 36 of 40 lesions there was a good angiographic result with residual stenoses in less than 30%. In 70 lesions treated by rotational atherectomy, however, 54% showed residual stenoses of 30%-50% and these cases required additional balloon angioplasty. The mean ankle-brachial index improved significantly (p<0.001), from 0.49 before the procedure to 1.01 after the procedure. A single distal embolus, related to primary recanalization, occurred and there were two large inguinal hematomas. Cumulative clinical patency after 6 months was 83.8% and cumulative angiographic patency after 6 months was 79.1%. Conclusion. Percutaneous rotational atherectomy is a promising approach for the treatment of chronic peripheral vascular disease. Further prospective, randomized studies are necessary to compare percutaneous transluminal angioplasty with this new technical approach

The Effect of Question Position on Listening Comprehension: A Case Study

OpenAIRE

Naci Yildiz; Nikoloz Parjanadze; Mustafa Albay

2015-01-01

Though speaking has been considered as the most important skill in foreign language learning process, listening has a fundamental value because learning does not occur without comprehensible input. Listening is a complex process in which learners must do analysis to accurately interpret. In listening learners need to interpret with a speaker to construct meaning. This study tries to find out whether listening strategies are effective to influence listening comprehension and the major goal of ...

Getting the Joke: Insight during Humor Comprehension - Evidence from an fMRI Study.

Science.gov (United States)

Tian, Fang; Hou, Yuling; Zhu, Wenfeng; Dietrich, Arne; Zhang, Qinglin; Yang, Wenjing; Chen, Qunlin; Sun, Jiangzhou; Jiang, Qiu; Cao, Guikang

2017-01-01

As a high-level cognitive activity, humor comprehension requires incongruity detection and incongruity resolution, which then elicits an insight moment. The purpose of the study was to explore the neural basis of humor comprehension, particularly the moment of insight, by using both characters and language-free cartoons in a functional magnetic resonance imaging study. The results showed that insight involving jokes elicited greater activation in language and semantic-related brain regions as well as a variety of additional regions, such as the superior frontal gyrus (SFG), the inferior frontal gyrus (IFG), the middle temporal gyrus (MTG), the superior temporal gyrus (STG), the temporoparietal junctions (TPJ), the hippocampus and visual areas. These findings indicate that the MTG might play a role in incongruity detection, while the SFG, IFG and the TPJ might be involved in incongruity detection. The passive insight event elicited by jokes appears to be mediated by a limited number of brain areas. Our study showed that the brain regions associated with humor comprehension were not affected by the type of stimuli and that humor and insight shared common brain areas. These results indicate that one experiences a feeling of insight during humor comprehension, which contributes to the understanding of humor comprehension.

Gastroesophageal Variceal Filling and Drainage Pathways: An Angiographic Description of Afferent and Efferent Venous Anatomic Patterns

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Ron C Gaba

2015-01-01

Full Text Available Varices commonly occur in liver cirrhosis patients and are classified as esophageal (EV, gastroesophageal (GEV, or isolated gastric (IGV varices. These vessels may be supplied and drained by several different afferent and efferent pathways. A working knowledge of variceal anatomy is imperative for Interventional Radiologists performing transjugular intrahepatic portosystemic shunt and embolization/obliteration procedures. This pictorial essay characterizes the angiographic anatomy of varices in terms of type and frequency of venous filling and drainage, showing that different varices have distinct vascular anatomy. EVs typically show left gastric vein filling and “uphill” drainage, and GEVs and IGVs exhibit additional posterior/short gastric vein contribution and “downhill” outflow. An understanding of these variceal filling and drainage pathways can facilitate successful portal decompression and embolization/obliteration procedures.

Renal artery origins and variations: angiographic evaluation of 855 consecutive patients.

Science.gov (United States)

Ozkan, Uğur; Oğuzkurt, Levent; Tercan, Fahri; Kizilkiliç, Osman; Koç, Zafer; Koca, Nihal

2006-12-01

To determine angiographically the origins and variations of renal arteries. The study included 855 consecutive patients (163 females, 692 males; mean age, 61 years) living in the Cukurova region of Turkey, who underwent either aortofemoropopliteal (AFP) angiography for the investigation of peripheral arterial disease, or renal angiography for renovascular hypertension, and were prospectively evaluated. Renal arteries were visualized by non-selective catheterization during AFP angiography and by selective or non-selective catheterization during renal angiography. Locations of renal artery origins and renal artery variations, including the presence of extra renal arteries and division patterns were analyzed on angiograms. The origin of main renal arteries off the aorta was between the upper margin of L1 and lower margin of L2 vertebra in 98% of the patients, and in 74%, this was the origin of extra renal arteries. The most common location for renal artery origin was the L1-L2 intervertebral disc level. A single renal artery was present in both kidneys in 76% of patients. Renal artery variations included multiple arteries in 24%, bilateral multiple arteries in 5%, and early division in 8% of the cases. Additional renal arteries on the right side were found in 16% and on the left side in 13% of cases. Of all the extra renal arteries, the percentage of accessory and aberrant renal arteries were 49% and 51%, respectively. Renal arteries originated between the first and the second lumbar vertebral levels in most patients. Extra renal arteries were quite frequent. These results should be kept in mind when a non-invasive diagnostic search is performed for renal artery stenosis, or when renal surgery related to renal arteries is performed.

Angiographically occult vascular malformation of the brain: MR imaging at 1.5 T

International Nuclear Information System (INIS)

Patel, S.C.; Sanders, W.P.; Fuentes, J.; Haggar, A.M.; Mehta, B.A.; Boulos, R.S.; Froelich, J.W.

1986-01-01

MR imaging was performed in nine patients with 12 angiographically occult arteriovenous malformations using a 1.5-T superconducting magnet; four additional patients were imaged using a 0.3-T system. All images were reviewed in conjunction with CT scans. The following observations were made. (1) Eleven of 14 supratentorial lesions were located at the junction of gray and white matter. (2) Exclusing acute hemorrhage, only two lesions displayed mild mass effect. (3) All lesions displayed central foci of high signal intensity, probably representing subacute hemorrhage. (4) All lesions but one showed a peripheral rim of low signal intensity which progressively lost signal with increasing T2 weighting. This most likely represents iron-containing hemosiderin deposition. (5) Lesions were best demonstrated with long repetition times and moderate T2 weighting (TR = 2,500 msec, TE = 25-100 msec). (6) All lesions but one were hyperdense on non-contrast-enhanced CT, although only three had unequivocal calcification. The possibility of hyperdensity due to blood or iron deposition is discussed

Correlates of lower comprehension of informed consent among participants enrolled in a cohort study in Pune, India.

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Joglekar, Neelam S; Deshpande, Swapna S; Sahay, Seema; Ghate, Manisha V; Bollinger, Robert C; Mehendale, Sanjay M

2013-03-01

Optimum comprehension of informed consent by research participants is essential yet challenging. This study explored correlates of lower comprehension of informed consent among 1334 participants of a cohort study aimed at estimating HIV incidence in Pune, India. As part of the informed consent process, a structured comprehension tool was administered to study participants. Participants scoring ≥90% were categorised into the 'optimal comprehension group', whilst those scoring 80-89% were categorised into the 'lower comprehension group'. Data were analysed to identify sociodemographic and behavioural correlates of lower consent comprehension. The mean ± SD comprehension score was 94.4 ± 5.00%. Information pertaining to study-related risks was not comprehended by 61.7% of participants. HIV-negative men (adjusted OR [AOR] = 4.36, 95% CI 1.71-11.05) or HIV-negative women (AOR = 13.54, 95% CI 6.42-28.55), illiteracy (AOR= 1.65, 95% CI 1.19-2.30), those with a history of multiple partners (AOR = 1.73, 95% CI 1.12-2.66) and those never using condoms (AOR = 1.35, 95% CI 1.01-1.82) were more likely to have lower consent comprehension. We recommend exploration of domains of lower consent comprehension using a validated consent comprehension tool. Improved education in these specific domains would optimise consent comprehension among research participants.

A novel method for the angiographic estimation of the percentage of spleen volume embolized during partial splenic embolization

International Nuclear Information System (INIS)

Ou, Ming-Ching; Chuang, Ming-Tsung; Lin, Xi-Zhang; Tsai, Hong-Ming; Chen, Shu-Yuan; Liu, Yi-Sheng

2013-01-01

Purpose: To evaluate the efficacy of estimating the volume of spleen embolized in partial splenic embolization (PSE) by measuring the diameters of the splenic artery and its branches. Materials and methods: A total of 43 liver cirrhosis patients (mean age, 62.19 ± 9.65 years) with thrombocytopenia were included. Among these, 24 patients underwent a follow-up CT scan which showed a correlation between angiographic estimation and measured embolized splenic volume. Estimated splenic embolization volume was calculated by a method based on diameters of the splenic artery and its branches. The diameters of each of the splenic arteries and branches were measured via 2D angiographic images. Embolization was performed with gelatin sponges. Patients underwent follow-up with serial measurement of blood counts and liver function tests. The actual volume of embolized spleen was determined by computed tomography (CT) measuring the volumes of embolized and non-embolized spleen two months after PSE. Results: PSE was performed without immediate major complications. The mean WBC count significantly increased from 3.81 ± 1.69 × 10 3 /mm 3 before PSE to 8.56 ± 3.14 × 10 3 /mm 3 at 1 week after PSE (P < 0.001). Mean platelet count significantly increased from 62.00 ± 22.62 × 10 3 /mm 3 before PSE to 95.40 ± 46.29 × 10 3 /mm 3 1 week after PSE (P < 0.001). The measured embolization ratio was positively correlated with estimated embolization ratio (Spearman's rho [ρ] = 0.687, P < 0.001). The mean difference between the actual embolization ratio and the estimated embolization ratio was 16.16 ± 8.96%. Conclusions: The method provides a simple method to quantitatively estimate embolized splenic volume with a correlation of measured embolization ratio to estimated embolization ratio of Spearman's ρ = 0.687

Pulmonary arteriography by digital subtraction angiographic method in cyanotic heart disease with pulmonary stenosis or pulmonary atresia

International Nuclear Information System (INIS)

Kobayashi, Junjiro; Hirose, Hajime; Nakano, Susumu

1985-01-01

Pulmonary arteriography was performed by digital subtraction angiographic (DSA) method in 10 patients with cyanotic heart disease associated with pulmonary stenosis or pulmonary atresia. Ten patients consisted of five patients with tetralogy of Fallot, three with single ventricle and pulmonary stenosis, and two with pseudotruncus arteriosus. Hepato-clavicular position was taken in four patients. Pulmonary artery and its main branches were opacified and recognized clearly, and their diameter could be measured accurately with a small amount of contrast medium. There was a good correlation between the diameter of pulmonary artery measured by DSA and that measured by conventional pulmonary arteriography. DSA is a useful method for evaluating the size and the stenosis of pulmonary artery especially in small cyanotic infants. (author)

Angiographic Cystoid Macular Edema and Outcomes in the Comparison of Age-Related Macular Degeneration Treatments Trials.

Science.gov (United States)

Shah, Neepa; Maguire, Maureen G; Martin, Daniel F; Shaffer, James; Ying, Gui-Shuang; Grunwald, Juan E; Toth, Cynthia A; Jaffe, Glenn J; Daniel, Ebenezer

2016-04-01

To describe morphologic and visual outcomes in eyes with angiographic cystoid macular edema (CME) treated with ranibizumab or bevacizumab for neovascular age-related macular degeneration (nAMD). Prospective cohort study within a randomized clinical trial. A total of 1185 CATT study subjects. Baseline fluorescein angiography (FA) images of all CATT study eyes were evaluated for CME. Grading of other characteristics on optical coherence tomography (OCT) and photographic images at baseline and during 2-year follow-up was completed by readers at the CATT Reading Centers. Three groups were created on the basis of baseline CME and intraretinal fluid (IRF) status: (1) CME, (2) IRF without CME, (3) neither CME nor IRF. Visual acuity (VA) and total central retinal thickness (CRT) on OCT at baseline, year 1, and year 2. Among 1131 participants with images of sufficient quality for determining CME and IRF at baseline, 92 (8.1%) had CME, 766 (67.7%) had IRF without CME, and 273 (24.1%) had neither. At baseline, eyes with CME had worse mean VA (letters) than eyes with IRF without CME and eyes with neither CME nor IRF (52 vs. 60 vs. 66 letters, P macular edema seems to be a marker for poorer visual outcomes in nAMD because of underlying baseline retinal dysfunction and subsequent scarring. Copyright © 2016 American Academy of Ophthalmology. Published by Elsevier Inc. All rights reserved.

Neural circuit of verbal humor comprehension in schizophrenia - an fMRI study

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Przemysław Adamczyk

2017-01-01

Full Text Available Individuals with schizophrenia exhibit problems with understanding the figurative meaning of language. This study evaluates neural correlates of diminished humor comprehension observed in schizophrenia. The study included chronic schizophrenia (SCH outpatients (n = 20, and sex, age and education level matched healthy controls (n = 20. The fMRI punchline based humor comprehension task consisted of 60 stories of which 20 had funny, 20 nonsensical and 20 neutral (not funny punchlines. After the punchlines were presented, the participants were asked to indicate whether the story was comprehensible and how funny it was. Three contrasts were analyzed in both groups reflecting stages of humor processing: abstract vs neutral stories - incongruity detection; funny vs abstract - incongruity resolution and elaboration; and funny vs neutral – complete humor processing. Additionally, parametric modulation analysis was performed using both subjective ratings separately. Between-group comparisons revealed that the SCH subjects had attenuated activation in the right posterior superior temporal gyrus (BA 41 in case of irresolvable incongruity processing of nonsensical puns; in the left dorsomedial middle and superior frontal gyri (BA 8/9 in case of incongruity resolution and elaboration processing of funny puns; and in the interhemispheric dorsal anterior cingulate cortex (BA 24 in case of complete processing of funny puns. Additionally, during comprehensibility ratings the SCH group showed a suppressed activity in the left dorsomedial middle and superior frontal gyri (BA 8/9 and revealed weaker activation during funniness ratings in the left dorsal anterior cingulate cortex (BA 24. Interestingly, these differences in the SCH group were accompanied behaviorally by a protraction of time in both types of rating responses and by indicating funny punchlines less comprehensible. Summarizing, our results indicate neural substrates of humor comprehension

Neural circuit of verbal humor comprehension in schizophrenia - an fMRI study.

Science.gov (United States)

Adamczyk, Przemysław; Wyczesany, Miroslaw; Domagalik, Aleksandra; Daren, Artur; Cepuch, Kamil; Błądziński, Piotr; Cechnicki, Andrzej; Marek, Tadeusz

2017-01-01

Individuals with schizophrenia exhibit problems with understanding the figurative meaning of language. This study evaluates neural correlates of diminished humor comprehension observed in schizophrenia. The study included chronic schizophrenia (SCH) outpatients (n = 20), and sex, age and education level matched healthy controls (n = 20). The fMRI punchline based humor comprehension task consisted of 60 stories of which 20 had funny, 20 nonsensical and 20 neutral (not funny) punchlines. After the punchlines were presented, the participants were asked to indicate whether the story was comprehensible and how funny it was. Three contrasts were analyzed in both groups reflecting stages of humor processing: abstract vs neutral stories - incongruity detection; funny vs abstract - incongruity resolution and elaboration; and funny vs neutral - complete humor processing. Additionally, parametric modulation analysis was performed using both subjective ratings separately. Between-group comparisons revealed that the SCH subjects had attenuated activation in the right posterior superior temporal gyrus (BA 41) in case of irresolvable incongruity processing of nonsensical puns; in the left dorsomedial middle and superior frontal gyri (BA 8/9) in case of incongruity resolution and elaboration processing of funny puns; and in the interhemispheric dorsal anterior cingulate cortex (BA 24) in case of complete processing of funny puns. Additionally, during comprehensibility ratings the SCH group showed a suppressed activity in the left dorsomedial middle and superior frontal gyri (BA 8/9) and revealed weaker activation during funniness ratings in the left dorsal anterior cingulate cortex (BA 24). Interestingly, these differences in the SCH group were accompanied behaviorally by a protraction of time in both types of rating responses and by indicating funny punchlines less comprehensible. Summarizing, our results indicate neural substrates of humor comprehension processing

WE-E-18A-09: Application of a Channelized Hotelling Observer Model to Evaluate Angiographic Imaging Equipment

Energy Technology Data Exchange (ETDEWEB)

Favazza, C; Fetterly, K; Hangiandreou, N; Leng, S; Schueler, B [Mayo Clinic, Rochester, MN (United States)

2014-06-15

Purpose: To develop and apply an observer model to objectively evaluate and compare the performance of different angiographic imaging equipment and acquisition variables. Methods: Image Acquisition— Iodine-based phantoms were created with target diameters: 0.5, 1, 2, and 4 mm. The phantoms were imaged using both planes of a bi-plane angiography system with detector pixel dimensions 0.1542 mm{sup 2} and 0.1842 mm{sup 2}, respectively. All four phantoms were imaged with magnification factors 1.5, 1.25 and 1 and with the large and small focal spots. Phantom position and the dose per frame (0.12– 0.24 μ Gy/frame) were varied for a single phantom size, magnification and focal spot. Observer Model— For each experimental condition, 1200 signal-present and signal-absent images were acquired and a detectability index (d') was calculated with a Gabor-channelized Hotelling observer (CHO) model. Detectability indices were evaluated as a function of dose, phantom size, and magnification. The model was then applied to compare d' of the two imaging planes and focal spots. Uncertainty in d' was estimated by bootstrapping the data and by examining the shift-variance of systems. Results: Detectability indices varied linearly with magnification and the square root of dose. For the 2 and 4 mm phantoms, d' varied linearly with diameter. For the 0.5 and 1 mm phantoms, d' expectedly deviated from this linear relationship due to substantial detector and focal spot blurring of the phantoms. The small focal spot yielded up to 50% greater d' values than the large focal spot. For the two detectors, differences in d' did not exceed the estimated ∼7% error. Conclusions: The detectability indices predictably scaled with dose, diameter, magnification, and focal spot size and serve to validate the model. Results demonstrate statistically similar target detectability for both investigated detectors, despite differences in pixel dimensions. This CHO model

WE-E-18A-09: Application of a Channelized Hotelling Observer Model to Evaluate Angiographic Imaging Equipment

International Nuclear Information System (INIS)

Favazza, C; Fetterly, K; Hangiandreou, N; Leng, S; Schueler, B

2014-01-01

Purpose: To develop and apply an observer model to objectively evaluate and compare the performance of different angiographic imaging equipment and acquisition variables. Methods: Image Acquisition— Iodine-based phantoms were created with target diameters: 0.5, 1, 2, and 4 mm. The phantoms were imaged using both planes of a bi-plane angiography system with detector pixel dimensions 0.1542 mm 2 and 0.1842 mm 2 , respectively. All four phantoms were imaged with magnification factors 1.5, 1.25 and 1 and with the large and small focal spots. Phantom position and the dose per frame (0.12– 0.24 μ Gy/frame) were varied for a single phantom size, magnification and focal spot. Observer Model— For each experimental condition, 1200 signal-present and signal-absent images were acquired and a detectability index (d') was calculated with a Gabor-channelized Hotelling observer (CHO) model. Detectability indices were evaluated as a function of dose, phantom size, and magnification. The model was then applied to compare d' of the two imaging planes and focal spots. Uncertainty in d' was estimated by bootstrapping the data and by examining the shift-variance of systems. Results: Detectability indices varied linearly with magnification and the square root of dose. For the 2 and 4 mm phantoms, d' varied linearly with diameter. For the 0.5 and 1 mm phantoms, d' expectedly deviated from this linear relationship due to substantial detector and focal spot blurring of the phantoms. The small focal spot yielded up to 50% greater d' values than the large focal spot. For the two detectors, differences in d' did not exceed the estimated ∼7% error. Conclusions: The detectability indices predictably scaled with dose, diameter, magnification, and focal spot size and serve to validate the model. Results demonstrate statistically similar target detectability for both investigated detectors, despite differences in pixel dimensions. This CHO model provides

An approach of long-view tomosynthesis in peripheral arterial angiographic examinations

Science.gov (United States)

Notohara, Daisuke; Nishino, Kazuyoshi; Shibata, Koichi

2011-03-01

Tomosynthesis (TS) has been evaluated as a useful diagnostic imaging tool for the orthopedic market and lung cancer screening. Previously, we proposed Long-View Tomosynthesis (LVTS) to apply further clinical application by expanding the reconstructed region of TS. LVTS method consists of three steps. First, it acquires multiple images while X-ray tube and Flat Panel Detector (FPD) are moving in the same linear direction simultaneously at a constant speed. Second, each image is divided into fixed length strips, and then the strips from different images having similar X-ray beam trajectory angles are stitched together. Last, multi slice coronal images are reconstructed by utilizing the Filtered Back Projection (FBP) technique from the long stitched images. The present LVTS method requires the acquisition by the constant speed motion to stitch each strip precisely. It is necessary to improve the LVTS method to apply peripheral angiographic examinations that are usually acquired at arbitrary variable speeds to chase the contrast media in the blood vessel. We propose adding the method of detecting the moved distance of frames along with anatomical structure and the method of selecting pixel values with contrast media to stitching algorithm. As a result, LVTS can extract new clinical information like 3-D structure of superficial femoral arteries and the entire blood vessel from images already acquired by routine bolus chasing techniques.

Reading Comprehension and Tolerance against Comprehension Ambiguities: An Empirical Study of Iranian GFL-Learners in Communicative Education

Science.gov (United States)

Haghani, Nader; Bahmannejad, Fereshteh

2018-01-01

The present study examines the influence of ambiguity tolerance on the performance of Iranian GFL-learners (Note 1) at level B1 in the processing of gap-filling-text tests. It is assumed that learners with more tolerance of ambiguity achieve better results in the reading comprehension or in the contextual guessing of the omitted words. 34 GFL…

A preliminary discussion of angiographic anatomy and variations of rabbit hepatic vessels and catheterization methods of hepatic artery

International Nuclear Information System (INIS)

Wang Diaodong; Yang Renjie; Zhang Hongzhi; Sun Hongliang

2006-01-01

Objective: To study the normal angiographic anatomy and variations of rabbit hepatic vessels, and explore the optimal method for hepatic artery catheterization. Methods: 30 rabbits were divided into two groups randomly. Modified surgical method and interventional method were used to catheterize hepatic artery respectively, and followed by angiography to demonstrate the normal anatomy and variations of rabbit celiac artery, hepatic artery and portal vein. Results: The route and distribution of rabbit celiac artery and hepatic artery were very different from human's. The commonly seen variation showed the differences in branching bifurcation of hepatic-gastric artery, with the incidence of 13.3%. The rates of successfully hepatic artery catheterization with surgical and interventional methods were 86.6%(13/15) and 80%(12/15) respectively (P>0.05). The surgical method will not be successful, whenever there's variation. Conclusion: The normal anatomy and variation of rabbit celiac artery and hepatic artery are quite different from human's. Both surgical and interventional catheterizations could be rather successful but possessing advantages and disadvantages of each its own. (authors)

Initial multicentre experience of high-speed myocardial perfusion imaging: comparison between high-speed and conventional single-photon emission computed tomography with angiographic validation

Energy Technology Data Exchange (ETDEWEB)

Neill, Johanne [University College London Hospital, Institute of Nuclear Medicine, London (United Kingdom); The Prince Charles Hospital, Brisbane (Australia); Prvulovich, Elizabeth M.; Bomanji, Jamshed B. [University College London Hospital, Institute of Nuclear Medicine, London (United Kingdom); Fish, Matthews B. [Sacred Heart Medical Center (SHMC), Springfield, OR (United States); Berman, Daniel S.; Slomka, Piotr J. [Cedars-Sinai Medical Center, Los Angeles, CA (United States); Sharir, Tali [Procardia Maccabi Healthcare Services (PMHS), Tel Aviv (Israel); Martin, William H. [Vanderbilt University Medical Center (VUMC), Nashville, TN (United States); DiCarli, Marcelo F. [Brigham and Women' s Hospital (BWH), Boston, MA (United States); Ziffer, Jack A. [Baptist Hospital of Miami (BHM), Miami, FL (United States); Shiti, Dalia [Spectrum-Dynamics, Caesarea (Israel); Ben-Haim, Simona [University College London Hospital, Institute of Nuclear Medicine, London (United Kingdom); Chaim Sheba Medical Center, Department of Nuclear Medicine, Tel-Hashomer (Israel)

2013-07-15

High-speed (HS) single-photon emission computed tomography (SPECT) with a recently developed solid-state camera shows comparable myocardial perfusion abnormalities to those seen in conventional SPECT. We aimed to compare HS and conventional SPECT images from multiple centres with coronary angiographic findings. The study included 50 patients who had sequential conventional SPECT and HS SPECT myocardial perfusion studies and coronary angiography within 3 months. Stress and rest perfusion images were visually analysed and scored semiquantitatively using a 17-segment model by two experienced blinded readers. Global and coronary territorial summed stress scores (SSS) and summed rest scores (SRS) were calculated. Global SSS {>=}3 or coronary territorial SSS {>=}2 was considered abnormal. In addition the total perfusion deficit (TPD) was automatically derived. TPD >5 % and coronary territorial TPD {>=}3 % were defined as abnormal. Coronary angiograms were analysed for site and severity of coronary stenosis; {>=}50 % was considered significant. Of the 50 patients, 13 (26 %) had no stenosis, 22 (44 %) had single-vessel disease, 6 (12 %) had double-vessel disease and 9 (18 %) had triple-vessel disease. There was a good linear correlation between the visual global SSS and SRS (Spearman's {rho} 0.897 and 0.866, respectively; p < 0.001). In relation to coronary angiography, the sensitivities, specificities and accuracies of HS SPECT and conventional SPECT by visual assessment were 92 % (35/38), 83 % (10/12) and 90 % (45/50) vs. 84 % (32/38), 50 % (6/12) and 76 % (38/50), respectively (p < 0.001). The sensitivities, specificities and accuracies of HS SPECT and conventional SPECT in relation to automated TPD assessment were 89 % (31/35), 57 % (8/14) and 80 % (39/49) vs. 86 % (31/36), 77 % (10/13) and 84 % (41/49), respectively. HS SPECT allows fast acquisition of myocardial perfusion images that correlate well with angiographic findings with overall accuracy by visual

The effects of tirofiban infusion on clinical and angiographic outcomes of patients with STEMI undergoing primary PCI.

Science.gov (United States)

Kaymaz, Cihangir; Keleş, Nurşen; Özdemir, Nihal; Tanboğa, İbrahim Halil; Demircan, Hacer C; Can, Mehmet M; Koca, Fatih; İzgi, İbrahim Akın; Özkan, Alper; Türkmen, Muhsin; Kırma, Cevat; Esen, Ali M

2015-11-01

The present study was designed to determine the effects of tirofiban (Tiro) infusion on angiographic measures, ST-segment resolution, and clinical outcomes in patients with STEMI undergoing PCI. Glycoprotein (GP) IIb/IIIa inhibitors are beneficial in ST-segment elevation myocardial infarction (STEMI) patients undergoing percutaneous coronary intervention (PCI), while the most effective timing of administration is still under investigation. A total of 1242 patients (83.0% males, mean (standard deviation; SD) age: 54.7 (10.9) years) with STEMI who underwent primary PCI were included in this retrospective non-randomized study in four groups, composed of no tirofiban infusion [Tiro (-); n=248], tirofiban infusion before PCI (pre-Tiro; n=720), tirofiban infusion during PCI (peri-Tiro; n=50), and tirofiban infusion after PCI (post-Tiro; n=224). In all Tiro (+) patients, bolus administration of Tiro (10 µg/kg) was followed by infusion (0.15 µg/kg/min) for a mean (SD) duration of 22.4±6.8 hours. The pre-PCI Tiro group was associated with the highest percentage of patients with TIMI 3 flow (99.4%; p75% ST-segment resolution (78.1%; pPCI significantly improves myocardial reperfusion, ST-segment resolution, in-hospital mortality rate, and in-hospital sudden cardiac death in patients with STEMI with no increased risk of major bleeding.

Comprehensive Environmental Assessment and U.S. EPA Nanomaterial Case Studies

Science.gov (United States)

These case studies are not completed risk assessments but are structured around an approach known as comprehensive environmental assessment (CEA), which combines a product life cycle framework with the risk assessment paradigm (Davis, J.M., J. Nanosci. Nanotech. 7:402-9, 2007). ...

Correlation between intrasac pressure measurements of a pressure sensor and an angiographic catheter during endovascular repair of abdominal aortic aneurysm

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Pierre Galvagni Silveira

2008-01-01

Full Text Available PURPOSE: To establish a correlation between intrasac pressure measurements of a pressure sensor and an angiographic catheter placed in the same aneurysm sac before and after its exclusion by an endoprosthesis. METHODS: Patients who underwent endovascular abdominal aortic aneurysm repair and received an EndoSureTM wireless pressure sensor implant between March 19 and December 11, 2004 were enrolled in the study. Simultaneous readings of systolic, diastolic, mean, and pulse pressure within the aneurysm sac were obtained from the catheter and the sensor, both before and after sac exclusion by the endoprosthesis (Readings 1 and 2, respectively. Intrasac pressure measurements were compared using Pearson's correlation and Student's t test. Statistical significance was set at p0.05, mean (p>0.05, and pulse (p0.05 by the sensor. CONCLUSION: The excellent agreement between intrasac pressure readings recorded by the catheter and the sensor justifies use of the latter for detection of post-exclusion abdominal aortic aneurysm pressurization.

Quantitative assessment of angiographic perfusion reduction using color-coded digital subtraction angiography during transarterial chemoembolization.

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Wang, Ji; Cheng, Jie-Jun; Huang, Kai-Yi; Zhuang, Zhi-Guo; Zhang, Xue-Bin; Chi, Jia-Chang; Hua, Xiao-Lan; Xu, Jian-Rong

2016-03-01

The aim of this study was to develop a quantitative measurement of perfusion reduction using color-coded digital subtraction angiography (ccDSA) to monitor intra-procedural arterial stasis during TACE. A total number of 35 patients with hepatocellular carcinoma who had undergone TACE were enrolled into the study. Pre- and post-two-dimensional digital subtraction angiography scans were conducted with same protocol and post-processed with ccDSA prototype software. Time-contrast-intensity (CI[t]) curve was obtained by region-of-interest (ROI) measurement on the generated ccDSA image. Quantitative 2D perfusion parameters time to peak, area under the curve (AUC), maximum upslope, and contrast intensity peak (CI-Peak) derived from the ROI-based CI[t] curve for pre- and post-TACE were evaluated to assess the reduction of antegrade blood flow and tumor blush. Relationships between 2D perfusion parameters, subjective angiographic chemoembolization endpoint (SACE) scale, and clinical outcomes were analyzed. Area normalized AUC and CI-Peak revealed significant reduction after the TACE (P SACE level III and a reduction ranging from 60% to 70% was equivalent to SACE level IV. For intermediate reduction (SACE level III), better tumor response was found after TACE rather than a higher reduction (SACE level IV). ccDSA application provides an objective approach to quantify the perfusion reduction and subjectively evaluate the arterial stasis of antegrade blood flow and tumor blush caused by TACE.

Humor comprehension and appreciation: an FMRI study.

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Bartolo, Angela; Benuzzi, Francesca; Nocetti, Luca; Baraldi, Patrizia; Nichelli, Paolo

2006-11-01

Humor is a unique ability in human beings. Suls [A two-stage model for the appreciation of jokes and cartoons. In P. E. Goldstein & J. H. McGhee (Eds.), The psychology of humour. Theoretical perspectives and empirical issues. New York: Academic Press, 1972, pp. 81-100] proposed a two-stage model of humor: detection and resolution of incongruity. Incongruity is generated when a prediction is not confirmed in the final part of a story. To comprehend humor, it is necessary to revisit the story, transforming an incongruous situation into a funny, congruous one. Patient and neuroimaging studies carried out until now lead to different outcomes. In particular, patient studies found that right brain-lesion patients have difficulties in humor comprehension, whereas neuroimaging studies suggested a major involvement of the left hemisphere in both humor detection and comprehension. To prevent activation of the left hemisphere due to language processing, we devised a nonverbal task comprising cartoon pairs. Our findings demonstrate activation of both the left and the right hemispheres when comparing funny versus nonfunny cartoons. In particular, we found activation of the right inferior frontal gyrus (BA 47), the left superior temporal gyrus (BA 38), the left middle temporal gyrus (BA 21), and the left cerebellum. These areas were also activated in a nonverbal task exploring attribution of intention [Brunet, E., Sarfati, Y., Hardy-Bayle, M. C., & Decety, J. A PET investigation of the attribution of intentions with a nonverbal task. Neuroimage, 11, 157-166, 2000]. We hypothesize that the resolution of incongruity might occur through a process of intention attribution. We also asked subjects to rate the funniness of each cartoon pair. A parametric analysis showed that the left amygdala was activated in relation to subjective amusement. We hypothesize that the amygdala plays a key role in giving humor an emotional dimension.

The association of age-related maculopathy susceptibility 2 (ARMS2) and complement factor H (CFH) variants with two angiographic subtypes of polypoidal choroidal vasculopathy.

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Miki, Akiko; Honda, Shigeru; Kondo, Naoshi; Negi, Akira

2013-09-01

To compare the association of age-related maculopathy susceptibility 2 (ARMS2) and complement factor H (CFH) variants between two different angiographic phenotypes of polypoidal choroidal vasculopathy (PCV). We included 175 Japanese patients with PCV and 150 age- and sex-matched controls. PCV was classified into two phenotypes (Type 1 and Type 2) according to the presence or absence of the feeding vessels found in indocyanine-green angiography. The single nucleotide polymorphism (SNP) at rs10490924 (A69S) in ARMS2 and rs800292 (I62V), rs1061170 (Y402H) in the CFH region were genotyped using the TaqMan assay. The minor allele frequency (MAF) of rs10490924 was significantly different between Type 1 PCV (n = 81) and control (p < 0.0001), while no difference was found between Type 2 PCV (n = 94) and control (p = 0.20). The MAF of rs800292 was significantly different between each type of PCV and control (p < 0.0001 and 0.0001 for Type 1 versus control and Type 2 versus control, respectively). The MAF of rs1061170 was not significantly different between either type of PCV and control (p = 0.084 and 0.15, respectively). There may be significantly different associations in the genetic variants of ARMS2 between two angiographic phenotypes of PCV.

A pilot study and novel angiographic classification for superior sagittal sinus stenting in patients with non-thrombotic intracranial venous occlusive disease.

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Raper, Daniel M S; Buell, Thomas J; Ding, Dale; Pomeraniec, I Jonathan; Crowley, R Webster; Liu, Kenneth C

2018-01-01

Safety and efficacy of superior sagittal sinus (SSS) stenting for non-thrombotic intracranial venous occlusive disease (VOD) is unknown. The aim of this retrospective cohort study is to evaluate outcomes after SSS stenting. We evaluated an institutional database to identify patients who underwent SSS stenting. Radiographic and clinical outcomes were analyzed and a novel angiographic classification of the SSS was proposed. We identified 19 patients; 42% developed SSS stenosis after transverse sinus stenting. Pre-stent maximum mean venous pressure (MVP) in the SSS of 16.2 mm Hg decreased to 13.1 mm Hg after stenting (p=0.037). Preoperative trans-stenosis pressure gradient of 4.2 mm Hg decreased to 1.5 mm Hg after stenting (pSSS stenosis distal to the stent construct was noted. Improvement in headache, tinnitus, and visual obscurations was reported by 66.7%, 63.6%, and 50% of affected patients, respectively, at mean follow-up of 5.2 months. We divided the SSS into four anatomically equal segments, numbered S1-S4, from the torcula to frontal pole. SSS stenosis typically occurs in the S1 segment, and the anterior extent of SSS stents was deployed at the S1-S2 junction in all but one case. SSS stenting is reasonably safe, may improve clinical symptoms, and significantly reduces maximum MVP and trans-stenosis pressure gradients in patients with VOD with SSS stenosis. The S1 segment is most commonly stenotic, and minimum pressure gradients for symptomatic SSS stenosis may be lower than for transverse or sigmoid stenosis. Additional studies and follow-up are necessary to better elucidate appropriate clinical indications and long-term efficacy of SSS stenting. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/.

Narrative comprehension and production in children with SLI: An eye movement study

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ANDREU, LLORENÇ; SANZ-TORRENT, MONICA; OLMOS, JOAN GUÀRDIA; MACWHINNEY, BRIAN

2014-01-01

This study investigates narrative comprehension and production in children with specific language impairment (SLI). Twelve children with SLI (mean age 5; 8 years) and 12 typically developing children (mean age 5; 6 years) participated in an eye-tracking experiment designed to investigate online narrative comprehension and production in Catalan- and Spanish-speaking children with SLI. The comprehension task involved the recording of eye movements during the visual exploration of successive scenes in a story, while listening to the associated narrative. With regard to production, the children were asked to retell the story, while once again looking at the scenes, as their eye movements were monitored. During narrative production, children with SLI look at the most semantically relevant areas of the scenes fewer times than their age-matched controls, but no differences were found in narrative comprehension. Moreover, the analyses of speech productions revealed that children with SLI retained less information and made more semantic and syntactic errors during retelling. Implications for theories that characterize SLI are discussed. PMID:21453036

Avaliação da autofluorescência do fundo de olho nas distrofias de retina com o aparelho Heidelberg Retina Angiograph2 Evaluation of fundus autofluorescence in hereditary retinal diseases using Heidelberg Retina Angiograph2

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Monique Côco

2007-10-01

for the formation of the image autofluorescence using Heidelberg Retina Angiograph2. The images of each group of patients were analyzed to verify common characteristics. RESULTS: The fundus autofluorescence of healthy volunteers showed the foveal area darker than the surrounding retina. The images of Stargardt macular dystrophy, in general, presented an oval central lesion, with reduced autofluorescence. The main alterations of the autofluorescence in patients with cone dystrophy were reduced foveal autofluorescence with a parafoveal ring of increased autofluorescence. In general, the images of retinitis pigmentosa showed outlying pigments with reduced autofluorescence, and of the foveal area, in some cases disorganization or reduced autofluorescence. CONCLUSION: The study showed the existence of patterns of fundus autofluorescence in the hereditary retinal diseases that allow the diagnosis and better interpretation of the pathogenesis of these diseases.

Exploring the Causes of Listening Comprehension Anxiety from EFL Saudi Learners’ Perspectives: A Pilot Study

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Ibrahim Otair

2017-08-01

Full Text Available Anxiety is an important factor in foreign language learning. Very few studies have been done on English as a Foreign Language (EFL Saudi students in listening classes. Therefore, this pilot study was aimed at exploring the causes of listening comprehension anxiety from EFL Saudi learners’ perspectives at Majmaah University, Saudi Arabia. The pilot study involved two students who were selected based on the following criteria: 1 Only Saudi male undergraduate students who enrolled in Preparatory Year Program (PYP at Majmaah University would be involved in this study, 2 The students who had studied or lived in native English speaking countries would be excluded. The researcher used pseudonyms to refer to the participants as Mohammad and Ismail. This study employed a qualitative case study research design. The data were collected through Semi-structured interviews with the participants. The interview sessions were audiotaped and transcribed. The results show that the participants experienced a high level of anxiety when doing the listening comprehension tasks. Three main causes of listening comprehension anxiety emerged from this study: 1 the problematic nature of listening comprehension, 2 the classroom atmosphere, and 3 the low English proficiency of the students.

A randomized comparison of the Saphenous Vein Versus Right Internal Thoracic Artery as a Y-Composite Graft (SAVE RITA) trial: One-year angiographic results and mid-term clinical outcomes.

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Kim, Ki-Bong; Hwang, Ho Young; Hahn, Seokyung; Kim, Jun Sung; Oh, Se Jin

2014-09-01

The Saphenous Vein Versus Right Internal Thoracic Artery as a Y-Composite Graft (SAVE RITA) trial was designed to evaluate the noninferiority of the saphenous vein (SV) compared with the right internal thoracic artery ([R]ITA) used as a Y-composite graft. A total of 224 patients who had undergone off-pump revascularization for multivessel coronary artery disease using the SV or RITA as a Y-composite graft based on the in situ left ITA were assigned randomly to the SV Y-composite graft (SV group, n = 112) or free RITA Y-composite graft (RITA group, n = 112). The primary endpoint was the 1-year angiographic patency rate of the second limb conduits (SV or RITA). Postoperative 1-year coronary angiograms were performed in 215 patients (SV group, 108; RITA group, 107). The overall graft patency rate was 97.4% (745 of 765) at 1 year (97.9% in the SV group vs 96.9% in the RITA group, P = .362). The primary endpoint of the study, the 1-year patency rate of the SV composite grafts, was 97.1% (238 of 245) and was noninferior to that of the RITA composite grafts (97.1% [198 of 204]) with a 95% lower confidence limit of -2.6% (P RITA composite grafts in terms of the 1-year angiographic patency rates. Copyright © 2014 The American Association for Thoracic Surgery. Published by Mosby, Inc. All rights reserved.

Cerebellar arteries originating from the internal carotid artery: angiographic evaluation and embryologic explanations

International Nuclear Information System (INIS)

Lee, Jae Young; Han, Moon Hee; Yu, In Gyu; Chang, Ki Hyun; Kim, Eui Jong; Kim, Dae Ho

1997-01-01

To find and describe the cerebellar arteries arising from the internal carotid artery, explain them embryologically, and evaluate their clinical implication. To determine the point in the internal carotid artery from which the cereballar artery arose anomalously, consecutive angiographic studies performed in the last three years were reviewed. The distribution of such anomalous cerebellar arteries, the point in the internal carotid artery from which the anomalous vessels originated, and associated findings were analyzed. Five anomalous origins of cerebellar arteries arising arising directly from the internal carotid artery were found in five patients. Three anterior inferior cerebellar arteries (AICA) and one common trunk of an AICA and a posterior inferior cerebellar artery (PICA) were found to originate from the internal carotid artery at a point close to the origin of the primitive trigeminal artery. A PICA arose from an artery presenting a course similar to the proatlantal intersegmental artery. Intracranial aneurysms in two patients, Moyamoya disease in one, and facial arteriovenous malformation in one. In our series, AICAs supplied from the arteries considered to be persistent trigeminal artery variants were the most common type. A correlation between type of anomalous cerebellar artery and type of carotid-vertebrobasilar anastomosis may exist. Cerebellar arteries originating anomalously from the internal carotid artery seem to occur as a result of the persistence of carotid-vertebrobasilar anastomoses associated with incomplete fusion of the longitudinal neural arteries. An understanding of these anomalous cerebellar arteries may help prevent accidents during therapeutic embolization and surgical treatment, as well as misinterpretation

A novel method for the angiographic estimation of the percentage of spleen volume embolized during partial splenic embolization

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Ou, Ming-Ching; Chuang, Ming-Tsung [Department of Diagnostic Radiology, National Cheng-Kung University Hospital, No. 138 Sheng Li Road, Tainan 704, Taiwan, ROC (China); Lin, Xi-Zhang [Department of Internal Medicine, National Cheng-Kung University Hospital, No. 138 Sheng Li Road, Tainan 704, Taiwan, ROC (China); Tsai, Hong-Ming; Chen, Shu-Yuan [Department of Diagnostic Radiology, National Cheng-Kung University Hospital, No. 138 Sheng Li Road, Tainan 704, Taiwan, ROC (China); Liu, Yi-Sheng, E-mail: taicheng100704@yahoo.com.tw [Department of Diagnostic Radiology, National Cheng-Kung University Hospital, No. 138 Sheng Li Road, Tainan 704, Taiwan, ROC (China)

2013-08-15

Purpose: To evaluate the efficacy of estimating the volume of spleen embolized in partial splenic embolization (PSE) by measuring the diameters of the splenic artery and its branches. Materials and methods: A total of 43 liver cirrhosis patients (mean age, 62.19 ± 9.65 years) with thrombocytopenia were included. Among these, 24 patients underwent a follow-up CT scan which showed a correlation between angiographic estimation and measured embolized splenic volume. Estimated splenic embolization volume was calculated by a method based on diameters of the splenic artery and its branches. The diameters of each of the splenic arteries and branches were measured via 2D angiographic images. Embolization was performed with gelatin sponges. Patients underwent follow-up with serial measurement of blood counts and liver function tests. The actual volume of embolized spleen was determined by computed tomography (CT) measuring the volumes of embolized and non-embolized spleen two months after PSE. Results: PSE was performed without immediate major complications. The mean WBC count significantly increased from 3.81 ± 1.69 × 10{sup 3}/mm{sup 3} before PSE to 8.56 ± 3.14 × 10{sup 3}/mm{sup 3} at 1 week after PSE (P < 0.001). Mean platelet count significantly increased from 62.00 ± 22.62 × 10{sup 3}/mm{sup 3} before PSE to 95.40 ± 46.29 × 10{sup 3}/mm{sup 3} 1 week after PSE (P < 0.001). The measured embolization ratio was positively correlated with estimated embolization ratio (Spearman's rho [ρ] = 0.687, P < 0.001). The mean difference between the actual embolization ratio and the estimated embolization ratio was 16.16 ± 8.96%. Conclusions: The method provides a simple method to quantitatively estimate embolized splenic volume with a correlation of measured embolization ratio to estimated embolization ratio of Spearman's ρ = 0.687.

A cross-language study of decontextualized vocabulary comprehension in toddlerhood and kindergarten readiness.

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Friend, Margaret; Smolak, Erin; Liu, Yushuang; Poulin-Dubois, Diane; Zesiger, Pascal

2018-04-05

Recent studies demonstrate that emerging literacy depends on earlier language achievement. Importantly, most extant work focuses on parent-reported production prior to 30 months of age. Of interest is whether and how directly assessed vocabulary comprehension in the 2nd year of life supports vocabulary and kindergarten readiness in the 4th year. We first contrasted orthogonal indices of parent-reported production and directly assessed vocabulary comprehension and found that comprehension was a stronger predictor of child outcomes. We then assessed prediction from vocabulary comprehension controlling for maternal education, preschool attendance, and child sex. In 3 studies early, decontextualized vocabulary comprehension emerged as a significant predictor of 4th year language and kindergarten readiness accounting for unique variance above demographic control variables. Further we found that the effect of early vocabulary on 4th year kindergarten readiness was not mediated by 4th year vocabulary. This pattern of results emerged in English monolingual children (N = 48) and replicated in French monolingual (N = 58) and French-English bilingual children (N = 34). Our findings suggest that early, decontextualized vocabulary may provide a platform for the establishment of a conceptual system that supports both later vocabulary and kindergarten readiness, including the acquisition of a wide range of concepts including print and number. Differences between parent-reported and directly assessed vocabulary and the mechanisms by which decontextualized vocabulary may contribute to conceptual development are discussed. (PsycINFO Database Record (c) 2018 APA, all rights reserved).

The Comprehension of Familiar and Novel Metaphoric Meanings in Schizophrenia: A Pilot Study

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Rapp, Alexander M.; Felsenheimer, Anne K.; Langohr, Karin; Klupp, Magdalena

2018-01-01

Miscomprehension of nonliteral (“figurative”) language like metaphors, proverbs, idioms, and ironic expressions by patients with schizophrenia is a phenomenon mentioned already in historical psychiatric descriptions. However, it was only recently that studies did differentiate between novel and conventional metaphors, a factor that is known to influence the difficulty of comprehension in healthy subjects. Further, familiarity with stimuli is an important factor for comprehension, which was not recommended in utmost previous studies. In this study, 23 patients with DSM IV schizophrenia and 19 healthy control subjects performed a newly-developed German metaphor comprehension test with three types of stimuli: novel metaphors, conventional German metaphors, and meaningless statements. During the test procedure, participants indicated familiarity with the stimulus and then matched the meaning with one out of four given alternatives. Familiarity rankings did not significantly differ between patients and control subjects. However, on descriptive level, there was a tendency for healthy controls to be more familiar with conventional metaphors than schizophrenic patients. Further, comprehension of conventional and novel metaphors differed significantly between the groups, with higher performance in healthy controls. Considering only those metaphors that had been ranked as familiar, patients only revealed significant lower performance opposed to controls regarding novel metaphors, while they did not differ in conventional metaphors. Taken together, the results indicate that patients with schizophrenia might show an altered way of comprehension in novel metaphors, leading to more misunderstandings. However, their previously reported impairments in conventional metaphors might rather be due to a lack of familiarity with the stimuli—making conventional metaphors to novel metaphors in the individual case. PMID:29354082

The Comprehension of Familiar and Novel Metaphoric Meanings in Schizophrenia: A Pilot Study

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Alexander M. Rapp

2018-01-01

Full Text Available Miscomprehension of nonliteral (“figurative” language like metaphors, proverbs, idioms, and ironic expressions by patients with schizophrenia is a phenomenon mentioned already in historical psychiatric descriptions. However, it was only recently that studies did differentiate between novel and conventional metaphors, a factor that is known to influence the difficulty of comprehension in healthy subjects. Further, familiarity with stimuli is an important factor for comprehension, which was not recommended in utmost previous studies. In this study, 23 patients with DSM IV schizophrenia and 19 healthy control subjects performed a newly-developed German metaphor comprehension test with three types of stimuli: novel metaphors, conventional German metaphors, and meaningless statements. During the test procedure, participants indicated familiarity with the stimulus and then matched the meaning with one out of four given alternatives. Familiarity rankings did not significantly differ between patients and control subjects. However, on descriptive level, there was a tendency for healthy controls to be more familiar with conventional metaphors than schizophrenic patients. Further, comprehension of conventional and novel metaphors differed significantly between the groups, with higher performance in healthy controls. Considering only those metaphors that had been ranked as familiar, patients only revealed significant lower performance opposed to controls regarding novel metaphors, while they did not differ in conventional metaphors. Taken together, the results indicate that patients with schizophrenia might show an altered way of comprehension in novel metaphors, leading to more misunderstandings. However, their previously reported impairments in conventional metaphors might rather be due to a lack of familiarity with the stimuli—making conventional metaphors to novel metaphors in the individual case.

Effects of Audiovisual Media on L2 Listening Comprehension: A Preliminary Study in French

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Becker, Shannon R.; Sturm, Jessica L.

2017-01-01

The purpose of the present study was to determine whether integrating online audiovisual materials into the listening instruction of L2 French learners would have a measurable impact on their listening comprehension development. Students from two intact sections of second-semester French were tested on their listening comprehension before and…

The Feasibility of Contrast-Enhanced Ultrasound During Uterine Artery Embolization: A Pilot Study

International Nuclear Information System (INIS)

Dorenberg, Eric J.; Jakobsen, Jarl A.; Brabrand, Knut; Hafsahl, Geir; Smith, Hans-Jorgen

2007-01-01

Purpose. To evaluate the feasibility of using contrast-enhanced ultrasound (CEUS) during uterine artery embolization (UAE) in order to define the correct end-point of embolization with complete devascularization of all fibroids. Methods. In this prospective study of 10 consecutive women undergoing UAE, CEUS was performed in the angiographic suite during embolization. When the angiographic end-point, defined as the 'pruned-tree' appearance of the uterine arteries was reached, CEUS was performed while the angiographic catheters to both uterine arteries were kept in place. The decision whether or not to continue the embolization was based on the findings at CEUS. The results of CEUS were compared with those of contrast-enhanced magnetic resonance imaging (MRI) 1 day as well as 3 months following UAE. Results. CEUS was successfully performed in all women. In 4 cases injection of particles was continued based on the findings at CEUS despite angiographically complete embolization. CEUS imaging at completion of UAE correlated well with the findings at MRI. Conclusion. The use of CEUS during UAE is feasible and may increase the quality of UAE

A simple method for 3D lesion reconstruction from two projected angiographic images: implementation to a stereotactic radiotherapy treatment planning system

International Nuclear Information System (INIS)

Theodorou, K.; Kappas, C.; Gaboriaud, G.; Mazal, A.D.; Petrascu, O.; Rosenwald, J.C.

1997-01-01

Introduction: The most used imaging modality for diagnosis and localisation of arteriovenous malformations (AVMs) treated with stereotactic radiotherapy is angiography. The fact that the angiographic images are projected images imposes the need of the 3D reconstruction of the lesion. This, together with the 3D head anatomy from CT images could provide all the necessary information for stereotactic treatment planning. We have developed a method to combine the complementary information provided by angiography and 2D computerized tomography, matching the reconstructed AVM structure with the reconstructed head of the patient. Materials and methods: The ISIS treatment planning system, developed at Institute Curie, has been used for image acquisition, stereotactic localisation and 3D visualisation. A series of CT slices are introduced in the system as well as two orthogonal angiographic projected images of the lesion. A simple computer program has been developed for the 3D reconstruction of the lesion and for the superposition of the target contour on the CT slices of the head. Results and conclusions: In our approach we consider that the reconstruction can be made if the AVM is approximated with a number of adjacent ellipses. We assessed the method comparing the values of the reconstructed and the actual volumes of the target using linear regression analysis. For treatment planning purposes we overlapped the reconstructed AVM on the CT slices of the head. The above feature is to our knowledge a feature that the majority of the commercial stereotactic radiotherapy treatment planning system could not provide. The implementation of the method into ISIS TPS shows that we can reliably approximate and visualize the target volume

Impact of Nursery Rhymes on Iranian EFL Learners’ Listening Comprehension Skill Improvement-A Study

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Omid Pourkalhor

2017-06-01

Full Text Available The present study was an attempt to investigate the effect of nursery rhymes on the young language learners listening comprehension ability. To do so, 30 elementary learners were selected as the potential participants of the study. The learners’ perceptions about using nursery rhymes in teaching listening as well as teachers’ perceptions about teaching listening comprehension through nursery rhymes were taken into account. The listening pre- and post-tests and teachers and learners’ interviews were employed for data collection procedures. Quantitative as well as qualitative methodologies were adapted for data analysis. Findings showed that the young learners could improve their listening comprehension ability as a result of using nursery rhymes. Interview data also indicated that the learners’ perceptions about nursery rhymes were found to be positive since the rhymes provided an interesting atmosphere for the learners to improve their listening comprehension while benefiting from peer interaction and teacher’s support in the listening classroom. Teachers’ perceptions were also realistic regarding using nursery rhymes in teaching listening, especially for young learners. As to the implication side, finding can contribute to the positive application of nursery rhymes in paving the way for young learners to improve their listening comprehension ability.

Cultural Knowledge in News Comprehension

DEFF Research Database (Denmark)

Mathieu, David

2009-01-01

This paper presents the main lines of the design and the findings of a reception study on news comprehension. This empirical study is a comparison of the comprehension processes of Danes and French Canadians over a set of news texts from both countries. Comprehension is explored from a cultural...... perspective, through the lens of cognition and pragmatics, revealing the role played by cultural knowledge in comprehension and the underlying relationship between a text and its intended audience. It is argued that recipients ‘problematise’ the news texts, a process by which the texts answer questions...

Informed consent comprehension in African research settings.

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Afolabi, Muhammed O; Okebe, Joseph U; McGrath, Nuala; Larson, Heidi J; Bojang, Kalifa; Chandramohan, Daniel

2014-06-01

Previous reviews on participants' comprehension of informed consent information have focused on developed countries. Experience has shown that ethical standards developed on Western values may not be appropriate for African settings where research concepts are unfamiliar. We undertook this review to describe how informed consent comprehension is defined and measured in African research settings. We conducted a comprehensive search involving five electronic databases: Medline, Embase, Global Health, EthxWeb and Bioethics Literature Database (BELIT). We also examined African Index Medicus and Google Scholar for relevant publications on informed consent comprehension in clinical studies conducted in sub-Saharan Africa. 29 studies satisfied the inclusion criteria; meta-analysis was possible in 21 studies. We further conducted a direct comparison of participants' comprehension on domains of informed consent in all eligible studies. Comprehension of key concepts of informed consent varies considerably from country to country and depends on the nature and complexity of the study. Meta-analysis showed that 47% of a total of 1633 participants across four studies demonstrated comprehension about randomisation (95% CI 13.9-80.9%). Similarly, 48% of 3946 participants in six studies had understanding about placebo (95% CI 19.0-77.5%), while only 30% of 753 participants in five studies understood the concept of therapeutic misconception (95% CI 4.6-66.7%). Measurement tools for informed consent comprehension were developed with little or no validation. Assessment of comprehension was carried out at variable times after disclosure of study information. No uniform definition of informed consent comprehension exists to form the basis for development of an appropriate tool to measure comprehension in African participants. Comprehension of key concepts of informed consent is poor among study participants across Africa. There is a vital need to develop a uniform definition for

A developmental study of proverb comprehension.

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Resnick, D A

1982-09-01

Growth in proverb comprehension was hypothesized to result from the gradual emergence of cognitive abilities reflected in a sequence of increasingly complex abilities: story matching, transfer of relations, desymbolization, proverb matching, and paraphrase. Items for these abilities for each of 10 proverbs of two structural types were administered in three test sessions to 438 students in grades three to seven. An analogy subtest was used to measure general intelligence. ANOVA yielded significant main effects for grade, tasks, and proverbs (all p's less than .01). A significant task x proverb interaction (p less than .01) revealed the difficulty of precise control over the language of the items. Proverb structure had no measurable impact on difficulty. Analogy score was a significant factor in performance (p less than .01) but not as potent as age (p less than .01). The sequential order of abilities received only weak confirmation, though tasks did correlate among themselves with medium strength (r's = .50-.70). Individual interviews added a qualitative dimension to the findings. The suitability of cognitive hierarchical models for proverb comprehension was questioned.

A Study of Holistic and Subskill Instructional Approaches to Reading Comprehension.

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Vacca, Richard T.

1980-01-01

In a six-week study involving seventh- to ninth-grade students in a summer corrective reading program, neither the holistic nor the subskill treatment had a significant advantage in improving student reading comprehension or attitude toward reading. (JT)

Theory of mind in emerging reading comprehension: A longitudinal study of early indirect and direct effects.

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Atkinson, Lynette; Slade, Lance; Powell, Daisy; Levy, Joseph P

2017-12-01

The relation between children's theory of mind (ToM) and emerging reading comprehension was investigated in a longitudinal study over 2.5years. A total of 80 children were tested for ToM, decoding, language skills, and executive function (EF) at Time 1 (mean age=3;10 [years;months]). At Time 2 (mean age=6;03), children's word reading efficiency, language skills, and reading comprehension were measured. Mediation analysis showed that ToM at Time 1, when children were around 4years old, indirectly predicted Time 2 reading comprehension, when children were 6years old, via language ability after controlling for age, nonverbal ability, decoding, EF, and earlier language ability. Importantly, ToM at 4years also directly predicted reading comprehension 2.5years later at 6years. This is the first longitudinal study to show a direct contribution of ToM to reading comprehension in typical development. Findings are discussed in terms of the simple view of reading (SVR); ToM not only supports reading comprehension indirectly by facilitating language but also contributes to it directly over and above the SVR. The potential role of metacognition is considered when accounting for the direct contribution of early ToM to later reading comprehension. Copyright © 2017 Elsevier Inc. All rights reserved.

Myocardial infarction in young versus older adults: clinical characteristics and angiographic features

International Nuclear Information System (INIS)

Shah, S.S.; Noor, L.; Shahsawar; Din, S.U.; Awan, Z.A.; Hafizullah, M.

2010-01-01

Background: Coronary artery disease is now frequently encountered in young adult population. However, being a relatively uncommon entity, not many studies are available in this regard. Therefore, the present study was designed to evaluate the clinical characteristics and angiographic features of patients less than 40 years of age with a history of myocardial infarction and compare them to patients older than 40 years. Methods: A total of 281 patients who underwent coronary angiography from April, 2009 to December, 2009, were included in this study. The patients were divided into two groups on the basis of age. Group A included patients 40 years of age or younger. Group B included patients older than 40 years. Both the groups were compared with respect to gender, hypertension, diabetes mellitus and extent and severity of coronary artery disease as assessed on coronary angiography. Results: Of the total 281 patients, 45 (16%) were less than or equal to 40 years old (Group-A) and 236 (84%) were older than 40 years (Group-B). There was no significant difference between the two groups with respect to the risk factors like gender, hypertension and diabetes mellitus. On coronary angiography, the two groups neither differed in the number of totally occluded vessels, nor in the severity of the culprit lesion. There were only 3 patients in group-A (6.7%) and 5 patients in group-B (2.1%) with normal coronaries (p=NS). Majority (60%) of the patients in group-A had no significant disease or single vessel disease while majority (69%) of the patients in group-B had two or more vessels involved (p<0.001). As far as the number of lesions in the coronary arteries is concerned, 62.3% patients had 2 or lesser lesions in group-A while 68.6% patients in group-B had three or more lesions (p=0.001). Conclusion: These data suggest that in our study, young patients with MI do not have significantly high prevalence of normal coronaries compared to older patients. Young patients are similar

A comprehensive study of sparse codes on abnormality detection

DEFF Research Database (Denmark)

Ren, Huamin; Pan, Hong; Olsen, Søren Ingvor

2017-01-01

Sparse representation has been applied successfully in abnor-mal event detection, in which the baseline is to learn a dic-tionary accompanied by sparse codes. While much empha-sis is put on discriminative dictionary construction, there areno comparative studies of sparse codes regarding abnormal-ity...... detection. We comprehensively study two types of sparsecodes solutions - greedy algorithms and convex L1-norm so-lutions - and their impact on abnormality detection perfor-mance. We also propose our framework of combining sparsecodes with different detection methods. Our comparative ex-periments are carried...

Comparison of plasma adiponectin & certain inflammatory markers in angiographically proven coronary artery disease patients with & without diabetes – A study from India

Science.gov (United States)

Kumpatla, Satyavani; Karuppiah, Kirubakaran; Immaneni, Sathyamurthy; Muthukumaran, Parthiban; Krishnan, Jayanthi; Narayanamoorthy, Srinivasan Kanthallu; Viswanathan, Vijay

2014-01-01

Background & objectives: The association between adiponectin and risk of cardiovascular disease is well known. The aim of the present study was to evaluate adiponectin and certain inflammatory markers and to determine the correlations between them in angiographically proven coronary artery disease (CAD) in subjects with and without diabetes. Methods: A total of 180 subjects who underwent coronary angiography for symptoms suggestive of CAD were categorised into groups based on their diabetes and/or CAD status: group1 (non-diabetic non-CAD); group2 (non-diabetic CAD); group3 (diabetic non-CAD) and group4 (diabetic CAD). Adiponectin, tumour necrosis factor α (TNF-α) and soluble form of E-selectin (sE-selectin) were estimated using quantitative sandwich enzyme immunoassay and high sensitive C-reactive protein (hsCRP) by particle enhanced immunoturbidimetric method. Results: Adiponectin levels were significantly lower in subjects with either diabetes or CAD and were much lower in subjects who had both. hsCRP was elevated in CAD and diabetes but did not differ significantly between groups. sE-selectin and TNF-α levels were elevated in CAD. Adiponectin negatively correlated with age, glucose, sE-selectin, total and LDL cholesterol. hsCRP correlated with BMI, sE-selectin and urea. sE-selectin correlated with BMI, triglycerides and VLDL cholesterol, whereas TNF-α correlated with fasting plasma glucose. In the logistic regression analysis, adiponectin had a significant inverse association with CAD. sE-selectin and TNF-α also showed significant independent association with CAD. Interpretation & conclusions: Adiponectin and other inflammatory markers such as sE-selectin and TNF-α showed a significant association with CAD. Hence, early assessment of such markers can help to identify high risk patients, and to reduce the inflammatory component of diabetes and CAD. PMID:25109718

Comprehensive Care

Science.gov (United States)

... Comprehensive Care Share this page Facebook Twitter Email Comprehensive Care Understand the importance of comprehensive MS care ... In this article A complex disease requires a comprehensive approach Today multiple sclerosis (MS) is not a ...

Effects of Strategy Instruction in an EFL Reading Comprehension Course: A Case Study

Directory of Open Access Journals (Sweden)

Sergio Lopera Medina

2012-01-01

Full Text Available Strategy instruction is useful in teaching contexts. This paper examines the effects of strategy instruction in an EFL reading comprehension course carried out with 26 undergraduate students at a Colombian university. As a research method, a case study was implemented. There were three instruments with which to collect data: reading comprehension tests, teacher's field notes and self-reflection in class at the strategy instruction phase, and a learning perception questionnaire. Given that students improved in reading comprehension, it would seem that reading strategy instruction is indeed very useful. Also, it was noted that when students applied reading strategies, they became more self-confident and this in turn enhanced their motivation. Finally, when students applied the reading strategy approach, the use of dictionaries decreased considerably.

Prediction of the development of reading comprehension: a longitudinal study

NARCIS (Netherlands)

Verhoeven, L.T.W.; Leeuwe, J.F.J. van

2008-01-01

Specific effects of word decoding, vocabulary and listening comprehension abilities on the development of reading comprehension were longitudinally examined for a representative sample of 2143 Dutch children throughout the elementary school period. An attempt was made to test two theoretical

Reading comprehension and its underlying components in second-language learners: A meta-analysis of studies comparing first- and second-language learners.

Science.gov (United States)

Melby-Lervåg, Monica; Lervåg, Arne

2014-03-01

We report a systematic meta-analytic review of studies comparing reading comprehension and its underlying components (language comprehension, decoding, and phonological awareness) in first- and second-language learners. The review included 82 studies, and 576 effect sizes were calculated for reading comprehension and underlying components. Key findings were that, compared to first-language learners, second-language learners display a medium-sized deficit in reading comprehension (pooled effect size d = -0.62), a large deficit in language comprehension (pooled effect size d = -1.12), but only small differences in phonological awareness (pooled effect size d = -0.08) and decoding (pooled effect size d = -0.12). A moderator analysis showed that characteristics related to the type of reading comprehension test reliably explained the variation in the differences in reading comprehension between first- and second-language learners. For language comprehension, studies of samples from low socioeconomic backgrounds and samples where only the first language was used at home generated the largest group differences in favor of first-language learners. Test characteristics and study origin reliably contributed to the variations between the studies of language comprehension. For decoding, Canadian studies showed group differences in favor of second-language learners, whereas the opposite was the case for U.S. studies. Regarding implications, unless specific decoding problems are detected, interventions that aim to ameliorate reading comprehension problems among second-language learners should focus on language comprehension skills.

Acute myocardial infarction in very young adults: A clinical presentation, risk factors, hospital outcome index, and their angiographic characteristics in North India-AMIYA Study.

Science.gov (United States)

Sinha, Santosh Kumar; Krishna, Vinay; Thakur, Ramesh; Kumar, Ashutosh; Mishra, Vikas; Jha, Mukesh Jitendra; Singh, Karandeep; Sachan, Mohit; Sinha, Rupesh; Asif, Mohammad; Afdaali, Nasar; Mohan Varma, Chandra

2017-03-01

India is currently in the fourth stage of epidemiological transitions where cardiovascular disease is the leading cause of mortality and morbidity. Purpose of the present study was to assess the risk factors, clinical presentation, angiographic profile including severity, and in-hospital outcome of very young adults (aged ≤ 30 years) with first acute myocardial infarction (AMI). Total of 1,116 consecutive patients with ST-segment elevation acute myocardial infarction (STEMI) were studied between March 2013 and February 2015 at LPS Institute of Cardiology, Kanpur, Uttar Pradesh, India. Mean age of the patients was 26.3 years. Risk factors were smoking (78.5%), family history of premature coronary artery disease (CAD) (46.8%), obesity (39.1%), physical inactivity (38.7%) and stressful life events (29.6%). The most common symptom and presentation was chest pain and anterior wall myocardial infarction (AWMI) in 94.8% and 58.8%, respectively. About 80.6% of patients had obstructive CAD with single vessel disease (57.6%), double-vessel disease (12.9%) and left main involvement (3.2%). Left anterior descending (LAD) was commonest culprit artery (58.1%) followed by right coronary artery in 28.2%. In-hospital mortality was 2.8%. Percutaneous coronary intervention was performed in 71.6% of patients. Median number and length of stent were 1.18 and 28 ± 16 mm, respectively. AMI in very young adult occurred most commonly in male. Smoking was the most common risk factor. AWMI owing to LAD artery involvement was the most common presentation. Mean time of presentation after symptom onset was 16.9 hours. In contrast to western population, it is characterised by earlier onset, delayed presentation, more severity, diffuse disease, and more morbidity but with favourable in-hospital mortality.

Treatment of diffuse in-stent restenosis with rotational atherectomy followed by radiation therapy with a 188Re-MAG3-filled balloon: six-month clinical and angiographic results of R4 registry

International Nuclear Information System (INIS)

Moon, D. H.; Oh, S. J.; Park, S. W.; Hong, M. K.; Lee, C. H.; Kim, J. Z.; Park, S. J.; Lee, H. K.

2000-01-01

Intracoronary β-irradiation after rotational atherectomy may be a reasonable approach to prevent recurrent in-stent restenosis (ISR). This study was done to evaluate the feasibility and efficacy of β-radiation therapy with a 188 Re-MAG3-filled balloon following rotational atherectomy for ISR. Fifty consecutive patients with diffuse ISR (length >10 mm) in native coronary arteries underwent rotational atherectomy and adjunctive balloon angioplasty followed by β-irradiation using 188 Re-MAG3-filled balloon catheter. The radiation doses was 15 Gy at 1.0 mm deep into vessel wall. Mean length of the lesion and irradiated segment was 25.6±12.7 mm and 37.6±11.2 mm, respectively. The radiation was delivered successfully to all patients, with a mean irradiation time of 20.1±61 7 sec. No adverse event including myocardial infarction, death, or stent thrombosis occurred during the follow-up period (mean 10.3±3.7 mon) and non-target vessel revascularization was needed in one patient. Six-month binary angiographic restenosis rate was 10.4% (2 focal ISR and 3 edge restenosis) and loss index was 0.17±0.31. Irradiation using 188 Re-MAG3-filled balloon following rotational atherectomy for patients with diffuse ISR may improve the clinical and angiographic outcomes. Further prospective randomized trials are warranted to evaluate the synergistic effect of debulking and irradiation in patients with diffuse ISR

Study on comprehensive evaluation model for nuclear power plant control room layout

International Nuclear Information System (INIS)

Zhu Yiming; Liu Yuan; Fan Huixian

2010-01-01

A comprehensive evaluation model for layout of the main control room of nuclear power plants was proposed. Firstly the design scope and principle for the layout of the main control room were defined based on the standards, and then the index system for the comprehensive evaluation was established. Finally, comprehensive evaluation was carried out for the layout design by applying the fuzzy comprehensive evaluation method in the index system. (authors)

WE-DE-207A-01: Parallels in the Evolution of X-Ray Angiographic Systems and Devices Used for Minimally Invasive Endovascular Therapy

Energy Technology Data Exchange (ETDEWEB)

Strother, C. [University of Wisconsin (United States)

2016-06-15

1. Parallels in the evolution of x-ray angiographic systems and devices used for minimally invasive endovascular therapy Charles Strother - DSA, invented by Dr. Charles Mistretta at UW-Madison, was the technology which enabled the development of minimally invasive endovascular procedures. As DSA became widely available and the potential benefits for accessing the cerebral vasculature from an endovascular approach began to be apparent, industry began efforts to develop tools for use in these procedures. Along with development of catheters, embolic materials, pushable coils and the GDC coils there was simultaneous development and improvement of 2D DSA image quality and the introduction of 3D DSA. Together, these advances resulted in an enormous expansion in the scope and numbers of minimally invasive endovascular procedures. The introduction of flat detectors for c-arm angiographic systems in 2002 provided the possibility of the angiographic suite becoming not just a location for vascular imaging where physiological assessments might also be performed. Over the last decade algorithmic and hardware advances have been sufficient to now realize this potential in clinical practice. The selection of patients for endovascular treatments is enhanced by this dual capability. Along with these advances has been a steady reduction in the radiation exposure required so that today, vascular and soft tissue images may be obtained with equal or in many cases less radiation exposure than is the case for comparable images obtained with multi-detector CT. Learning Objectives: To understand the full capabilities of today’s angiographic suite To understand how c-arm cone beam CT soft tissue imaging can be used for assessments of devices, blood flow and perfusion. Advances in real-time x-ray neuro-endovascular image guidance Stephen Rudin - Reacting to the demands on real-time image guidance for ever finer neurovascular interventions, great improvements in imaging chains are being

WE-DE-207A-01: Parallels in the Evolution of X-Ray Angiographic Systems and Devices Used for Minimally Invasive Endovascular Therapy

International Nuclear Information System (INIS)

Strother, C.

2016-01-01

1. Parallels in the evolution of x-ray angiographic systems and devices used for minimally invasive endovascular therapy Charles Strother - DSA, invented by Dr. Charles Mistretta at UW-Madison, was the technology which enabled the development of minimally invasive endovascular procedures. As DSA became widely available and the potential benefits for accessing the cerebral vasculature from an endovascular approach began to be apparent, industry began efforts to develop tools for use in these procedures. Along with development of catheters, embolic materials, pushable coils and the GDC coils there was simultaneous development and improvement of 2D DSA image quality and the introduction of 3D DSA. Together, these advances resulted in an enormous expansion in the scope and numbers of minimally invasive endovascular procedures. The introduction of flat detectors for c-arm angiographic systems in 2002 provided the possibility of the angiographic suite becoming not just a location for vascular imaging where physiological assessments might also be performed. Over the last decade algorithmic and hardware advances have been sufficient to now realize this potential in clinical practice. The selection of patients for endovascular treatments is enhanced by this dual capability. Along with these advances has been a steady reduction in the radiation exposure required so that today, vascular and soft tissue images may be obtained with equal or in many cases less radiation exposure than is the case for comparable images obtained with multi-detector CT. Learning Objectives: To understand the full capabilities of today’s angiographic suite To understand how c-arm cone beam CT soft tissue imaging can be used for assessments of devices, blood flow and perfusion. Advances in real-time x-ray neuro-endovascular image guidance Stephen Rudin - Reacting to the demands on real-time image guidance for ever finer neurovascular interventions, great improvements in imaging chains are being

A Study on the Comprehensive and Integrated Workplace Safety and Health Services in Singapore.

Science.gov (United States)

Chia, Sin Eng; Wah, Lim John; Khim, Judy Sng Gek; Yoong, Joanne; Lim, Raymond Boon Tar; Seng, Chia Kee

2015-09-01

The aim of this study was to evaluate the level of comprehensiveness and integration of workplace safety and health (WSH) services (safety, occupational health, and well-being) in Singapore. Thirty workplaces from five different sectors comprising more than 28,000 workers were assessed using three custom-developed tools. One quarter of the workplaces have applied the principles of comprehensive and integrated WSH. Among those that managed WSH comprehensively, workers were 4.4 times (95% confidence interval [CI], 2.33 to 8.25) more likely to be proud to work for their company, 7.4 times (95% CI, 3.96 to 13.90) more likely to be satisfied with their current job, and 1.7 times (95% CI, 1.21 to 2.32) more likely to balance the demands of work and home. There is a need to enhance awareness and education on comprehensive and integrated WSH in Singapore companies.

Reading Comprehension and Translation Performance of English Linguistics Students of Hung Vuong University: A Correlational Study

Directory of Open Access Journals (Sweden)

Cuc Thi Kim Pham

2017-09-01

Full Text Available The study aimed to correlate the reading comprehension and translation performance of English linguistic students, then inform some pedagogical implications for the teaching of reading comprehension in translation classes in order to enhance the translation quality performed by the students. To this end, 45 junior students of English linguistics specialization of Hung Vuong University, including 5 males and 40 females, aged from 20 to 22, were subject to a TOEFL reading comprehension test and a translation performance test (ATA guidelines, 2011. Data were analyzed using the Pearson Correlation, SPSS version 20.0. The coefficient correlation of students’ reading comprehension and their translation performance was noted 0.721 at the significant level of 0.01. It was found that the Reading comprehension was closely related to translation performance. Along the reading comprehension question types, translation performance was affected by the ability to determine gist and main ideas of the text, identify the vocabulary, infer the implied meanings and identify the writer’s style and attitudes. The results were discussed, and implications for teaching reading comprehension to enhance translation performance were presented.

Evidence for bilateral involvement in idiom comprehension : An fMRI study

NARCIS (Netherlands)

Zempleni, Monika-Zita; Haverkort, Marco; Renken, Remco; Stowe, Laurie A.

2007-01-01

The goal of the current study was to identify the neural substrate of idiom comprehension using fMRI. Idioms are familiar, fixed expressions whose meaning is not dependent on the literal interpretation of the component words. We presented literally plausible idioms in a sentence forcing a figurative

Case Study of an Institutionalized Urban Comprehensive School Physical Activity Program

Science.gov (United States)

Doolittle, Sarah A.; Rukavina, Paul B.

2014-01-01

This single case study (Yin, 2009) compares an established urban physical education/ sport/physical activity program with two models: Comprehensive School Physical Activity Program/CSPAP (AAHPERD, 2013; CDC, 2013); and Lawson's propositions (2005) for sport, exercise and physical education for empowerment and community development to determine…

The Effect of Stories for Thinking on Reading and Listening Comprehension: A Case Study in Turkey

Science.gov (United States)

Tok, Sükran; Mazl, Aysegül

2015-01-01

This study has been conducted in order to examine the effects of the stories for thinking on 5th graders' reading comprehension and listening comprehension. A pretest-post test control group quasi-experimental design was used in the study. The sample of the etstudy was composed of 74 5th graders attending public elementary schools. The data have…

Carotid Angioplasty In Octogenarians: A Mono-Arm Trial With Clinical And Angiographic Follow Up

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Ehsan Sharifipour

2017-02-01

Full Text Available Background: Octogenarians account for a third of ischemic stroke (IS patients and they have higher morbidity and mortality rate among IS patients. The aim of this study was to evaluate the pri-procedural and long term clinical and angiographic statement of carotid artery angioplasty (CAA in octogenarians. Methods: In a mono-arm trial 102 patients>80 years old with symptomatic internal carotid artery (ICA stenosis presented by non-disabling IS or TIA underwent the CAA and were evaluated prospectively from January 2010 to July 2014. All patients had standard stroke care during the study follow up. The peri-procedural complications, cerebrovascular accidents, restenosis in target vessel and mortality rate were recorded to evaluate safety and durability of this secondary stroke prevention method in octogenarians. Results: 48 (47.06% males and 54 (52.9% females in a mean period of 24.5±14.1 (6-50 months were followed. For all patients mean age was 83.39 ±2.53 (range, 80-88 years. The success rate of CAA was 100%, whereas the peri-procedural complication rate was 5.8% (access-site local hematoma and bradycardia during CAA both in 2.94%.There was only one patient who had acute ischemic stroke during the procedure. Restenosis occurred in 3.9% after a mean of 21.5 months. The proportion of recurrent cerebrovascular accident was 9.8% while TIAs occurred in 3.9% and stroke in 1% of patients. Also 4.9% of patients experienced coronary artery disease and the proportion of fatal recurrent cerebrovascular accident was 2.9%.  The median patient event-free survival was 20 months. Conclusion: CAA seems to be a safe and durable IS secondary prevention method in octogenarians with symptomatic carotid artery stenosis.

Plasma Tissue Factor Pathway Inhibitor Levels in Angiographically Defined Coronary Artery Disease Among Saudis

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Syed Shahid Habib

2013-05-01

Full Text Available Objectives: This study was aimed to determine plasma levels of total (TFPI-T and free (TFPI-F tissue factor pathway inhibitor, plasminogen activator inhibitor-1 (PAI-1, and tissue plasminogen activator (t-PA in a cohort of Saudi patients with chronic stable angiographically defined coronary artery disease (CAD and to determine its correlation with its severity.Methods: This cross sectional study was conducted in the department of physiology and department of cardiology, College of Medicine, and King Khalid University Hospital and King Saud University, Riyadh. Sixty known cases of CAD who had undergone angiography (35 males and 25 females were selected. A control group included 39 (20 males and 19 females healthy subjects. Fasting venous blood samples were analyzed for total (TFPI-T and free (TFPI-F tissue factor pathway inhibitor, plasminogen activator inhibitor-1 (PAI-1, and tissue plasminogen activator (t-PA. Gensini scores and vessel scores were determined for assessing CAD severity.Results: There were non-significant differences between age, body mass index (BMI and Blood pressure between the controls and CAD subjects. A comparison of hemostatic markers between control and CAD patients showed significantly higher levels of Fibrinogen, PAI-1, TFPI-T and TFPI-F in CAD patients compared to control subjects. But there was no difference in plasma t-PA levels. TFPI-T had a significant positive correlation with severity of disease determined by Gensini Scores (r=0.344; p=0.006 and vessel scores (r=0.338; p=0.015.Conclusion: Plasma levels of total tissue factor pathway inhibitor are significantly related with the presence and severity of CAD. Elevated levels of TFPI-T may be considered as useful diagnostic and prognostic markers in patients with CAD.

The Role of First-Language Listening Comprehension in Second-Language Reading Comprehension

Science.gov (United States)

Edele, Aileen; Stanat, Petra

2016-01-01

Although the simple view of reading and other theories suggest that listening comprehension is an important determinant of reading comprehension, previous research on linguistic transfer has mainly focused on the role of first language (L1) decoding skills in second language (L2) reading. The present study tested the assumption that listening…

Treatment of diffuse in-stent restenosis with rotational atherectomy followed by radiation therapy with a {sup 188}Re-MAG3-filled balloon: six-month clinical and angiographic results of R4 registry

Energy Technology Data Exchange (ETDEWEB)

Moon, D. H.; Oh, S. J.; Park, S. W.; Hong, M. K.; Lee, C. H.; Kim, J. Z.; Park, S. J.; Lee, H. K. [College of Medicine, Ulsan Univ., Seoul (Korea, Republic of)

2000-07-01

Intracoronary {beta}-irradiation after rotational atherectomy may be a reasonable approach to prevent recurrent in-stent restenosis (ISR). This study was done to evaluate the feasibility and efficacy of {beta}-radiation therapy with a {sup 188}Re-MAG3-filled balloon following rotational atherectomy for ISR. Fifty consecutive patients with diffuse ISR (length >10 mm) in native coronary arteries underwent rotational atherectomy and adjunctive balloon angioplasty followed by {beta}-irradiation using {sup 188}Re-MAG3-filled balloon catheter. The radiation doses was 15 Gy at 1.0 mm deep into vessel wall. Mean length of the lesion and irradiated segment was 25.6{+-}12.7 mm and 37.6{+-}11.2 mm, respectively. The radiation was delivered successfully to all patients, with a mean irradiation time of 20.1{+-}61 7 sec. No adverse event including myocardial infarction, death, or stent thrombosis occurred during the follow-up period (mean 10.3{+-}3.7 mon) and non-target vessel revascularization was needed in one patient. Six-month binary angiographic restenosis rate was 10.4% (2 focal ISR and 3 edge restenosis) and loss index was 0.17{+-}0.31. Irradiation using {sup 188}Re-MAG3-filled balloon following rotational atherectomy for patients with diffuse ISR may improve the clinical and angiographic outcomes. Further prospective randomized trials are warranted to evaluate the synergistic effect of debulking and irradiation in patients with diffuse ISR.

A Study of the Application of Big Data in a Rural Comprehensive Information Service

Directory of Open Access Journals (Sweden)

Leifeng Guo

2015-05-01

Full Text Available Big data has attracted extensive interest due to its potential tremendous social and scientific value. Researchers are also trying to extract potential value from agriculture big data. This paper presents a study of information services based on big data from the perspective of a rural comprehensive information service. First, we introduce the background of the rural comprehensive information service, and then we present in detail the National Rural Comprehensive Information Service Platform (NRCISP, which is supported by the national science and technology support program. Next, we discuss big data in the NRCISP according to data characteristics, data sources, and data processing. Finally, we discuss a service model and services based on big data in the NRCISP.

Stent underexpansion in angiographic guided percutaneous coronary intervention, despite adjunctive balloon post-dilatation, in drug eluting stent era

Directory of Open Access Journals (Sweden)

Mehrdad Taherioun

2014-01-01

Full Text Available BACKGROUND: Stent underexpansion is the most powerful predictor of long-term stent patency and clinical outcome. The purpose of this study was to evaluate the incidence and predictors of stent underexpansion despite adjunctive post-dilatation with non-compliant balloon. METHODS: After elective coronary stent implantation and adjunctive post-dilatation with non-compliant balloon and optimal angiographic result confirmed by the operator, intravascular ultrasound (IVUS was performed for all the treated lesions. If the treated lesions fulfilled the IVUS criteria, they are considered as the optimal stent group; if not, they are considered as the suboptimal group. RESULTS: From 50 patients enrolled in this study 39 (78% had optimal stent deployment and 11 (22% had suboptimal stent deployment. In the suboptimal group 7 (14% had underexpansion, 2 (4% malposition, and 2 (4% had asymmetry. There were no stent edge dissections detected by IVUS. We did not find any correlation between lesion calcification, ostial lesions, stent length, and stent underexpansion. Stent diameter ≤ 2.75 mm had a strong correlation with stent underexpansion. CONCLUSION: Despite adjunctive post-dilatation with noncompliant balloon, using a relatively small stent diameter was a strong predictor for underexpansion. IVUS guided percutaneous coronary intervention (PCI may be considered for drug eluting stent (DES implantation in relatively small vessels.   Keywords: Stent, Percutaneous Coronary Intervention, Ultrasound, Post-dilatation 

Classroom Talk for Rigorous Reading Comprehension Instruction

Science.gov (United States)

Wolf, Mikyung Kim; Crosson, Amy C.; Resnick, Lauren B.

2004-01-01

This study examined the quality of classroom talk and its relation to academic rigor in reading-comprehension lessons. Additionally, the study aimed to characterize effective questions to support rigorous reading comprehension lessons. The data for this study included 21 reading-comprehension lessons in several elementary and middle schools from…

Angiographic and hemodynamic evaluation of the mesoatrial shunt in patients with Budd-Chiari syndrome and inferior vena caval obstruction

International Nuclear Information System (INIS)

Redmond, P.L.; Kadir, S.; Cameron, J.L.; Kaufman, S.L.; White, R.I. Jr.

1986-01-01

Obstruction of the inferior vena cava (IVC) is not uncommon in patients with the Budd-Chiari syndrome. The caval obstruction may be due to thrombus or compression by an enlarged caudate lobe. Conventional portosystemic shunts are not possible in the presence of an obstructed IVC; the mesoatrial shunt is indicated in these patients. Between 1973 and 1986, the authors studied 13 patients (ten female, three male) with Budd-Chiari syndrome and IVC obstruction in whom mesoatrial shunts were subsequently constructed. Polycythemia rubra vera was the most common predisposing condition. Preoperative evaluation included US, scintigraphy, CT, and angiography (hepatic arteriography, hepatic venography and pressure measurements, inferior vena cavography, arterial portography). Postoperatively shunts were assessed angiographically and hemodynamically, and several patients underwent CT. The shunts were catheterized via a brachial or femoral venous approach, which allowed pressures along the shunt from the superior mesenteric vein to the right atrium to be measured. The mesoatrial shunt is a relatively new procedure which is indicated in patients with the Budd-Chiari syndrome complicated by IVC obstruction. Shunt patency may be demonstrated arteriographically or with CT, but hemodynamic evaluation with measurement of pressure gradients is required to assess shunt function

Burden of hospital admission and repeat angiography in angina pectoris patients with and without coronary artery disease: a registry-based cohort study.

Science.gov (United States)

Jespersen, Lasse; Abildstrom, Steen Z; Hvelplund, Anders; Madsen, Jan K; Galatius, Soren; Pedersen, Frants; Hojberg, Soren; Prescott, Eva

2014-01-01

To evaluate risk of hospitalization due to cardiovascular disease (CVD) and repeat coronary angiography (CAG) in stable angina pectoris (SAP) with no obstructive coronary artery disease (CAD) versus obstructive CAD, and asymptomatic reference individuals. We followed 11,223 patients with no prior CVD having a first-time CAG in 1998-2009 due to SAP symptoms and 5,695 asymptomatic reference individuals from the Copenhagen City Heart Study through registry linkage for 7.8 years (median). In recurrent event survival analysis, patients with SAP had 3-4-fold higher risk of hospitalization for CVD irrespective of CAG findings and cardiovascular comorbidity. Multivariable adjusted hazard ratios(95%CI) for patients with angiographically normal coronary arteries was 3.0(2.5-3.5), for angiographically diffuse non-obstructive CAD 3.9(3.3-4.6) and for 1-3-vessel disease 3.6-4.1(range)(all P<0.001). Mean accumulated hospitalization time was 3.5(3.0-4.0)(days/10 years follow-up) in reference individuals and 4.5(3.8-5.2)/7.0(5.4-8.6)/6.7(5.2-8.1)/6.1(5.2-7.4)/8.6(6.6-10.7) in patients with angiographically normal coronary arteries/angiographically diffuse non-obstructive CAD/1-, 2-, and 3-vessel disease, respectively (all P<0.05, age-adjusted). SAP symptoms predicted repeat CAG with multivariable adjusted hazard ratios for patients with angiographically normal coronary arteries being 2.3(1.9-2.9), for angiographically diffuse non-obstructive CAD 5.5(4.4-6.8) and for obstructive CAD 6.6-9.4(range)(all P<0.001). Patients with SAP symptoms and angiographically normal coronary arteries or angiographically diffuse non-obstructive CAD suffer from considerably greater CVD burdens in terms of hospitalization for CVD and repeat CAG compared with asymptomatic reference individuals even after adjustment for cardiac risk factors and exclusion of cardiovascular comorbidity as cause. Contrary to common perception, excluding obstructive CAD by CAG in such patients does not ensure a benign

Comprehensive Adult Student Assessment Systems Braille Reading Assessment: An Exploratory Study

Science.gov (United States)

Posey, Virginia K.; Henderson, Barbara W.

2012-01-01

Introduction: This exploratory study determined whether transcribing selected test items on an adult life and work skills reading test into braille could maintain the same approximate scale-score range and maintain fitness within the item response theory model as used by the Comprehensive Adult Student Assessment Systems (CASAS) for developing…

Overlapping genetic and child-specific nonshared environmental influences on listening comprehension, reading motivation, and reading comprehension.

Science.gov (United States)

Schenker, Victoria J; Petrill, Stephen A

2015-01-01

This study investigated the genetic and environmental influences on observed associations between listening comprehension, reading motivation, and reading comprehension. Univariate and multivariate quantitative genetic models were conducted in a sample of 284 pairs of twins at a mean age of 9.81 years. Genetic and nonshared environmental factors accounted for statistically significant variance in listening and reading comprehension, and nonshared environmental factors accounted for variance in reading motivation. Furthermore, listening comprehension demonstrated unique genetic and nonshared environmental influences but also had overlapping genetic influences with reading comprehension. Reading motivation and reading comprehension each had unique and overlapping nonshared environmental contributions. Therefore, listening comprehension appears to be related to reading primarily due to genetic factors whereas motivation appears to affect reading via child-specific, nonshared environmental effects. Copyright © 2015 Elsevier Inc. All rights reserved.

Overlapping Genetic and Child-Specific Nonshared Environmental Influences on Listening Comprehension, Reading Motivation, and Reading Comprehension

Science.gov (United States)

Schenker, Victoria J.; Petrill, Stephen A.

2015-01-01

This study investigated the genetic and environmental influences on observed associations between listening comprehension, reading motivation, and reading comprehension. Univariate and multivariate quantitative genetic models were conducted in a sample of 284 pairs of twins at a mean age of 9.81 years. Genetic and nonshared environmental factors accounted for statistically significant variance in listening and reading comprehension, and nonshared environmental factors accounted for variance in reading motivation. Furthermore, listening comprehension demonstrated unique genetic and nonshared environmental influences but also had overlapping genetic influences with reading comprehension. Reading motivation and reading comprehension each had unique and overlapping nonshared environmental contributions. Therefore, listening comprehension appears to be related to reading primarily due to genetic factors whereas motivation appears to affect reading via child-specific, nonshared environmental effects. PMID:26321677

The Comprehension Problems of Children with Poor Reading Comprehension despite Adequate Decoding: A Meta-Analysis.

Science.gov (United States)

Spencer, Mercedes; Wagner, Richard K

2018-06-01

The purpose of this meta-analysis was to examine the comprehension problems of children who have a specific reading comprehension deficit (SCD), which is characterized by poor reading comprehension despite adequate decoding. The meta-analysis included 86 studies of children with SCD who were assessed in reading comprehension and oral language (vocabulary, listening comprehension, storytelling ability, and semantic and syntactic knowledge). Results indicated that children with SCD had deficits in oral language ( d = -0.78, 95% CI [-0.89, -0.68], but these deficits were not as severe as their deficit in reading comprehension ( d = -2.78, 95% CI [-3.01, -2.54]). When compared to reading comprehension age-matched normal readers, the oral language skills of the two groups were comparable ( d = 0.32, 95% CI [-0.49, 1.14]), which suggests that the oral language weaknesses of children with SCD represent a developmental delay rather than developmental deviance. Theoretical and practical implications of these findings are discussed.

Super selective transcatheter angiographic embolization: an effective and prophylactic treatment for massive obstetric haemorrhage

International Nuclear Information System (INIS)

Zhou Yiming; Zhai Renyou; Qian Xiaojun; Wei Baojie; Gao Kun; Zhang Shilong; Liu Jinmei; Zhang Qiuhong; Jiang Lei

2008-01-01

Objective: To discuss the effect and safety of transcatheter angiographic embolization (TAE)for managing massive obstetric haemorrhage. Methods: 17 cases of obstetric massive haemorrhage or with haemorrhage tendency were treated with TAE. Among them 14 cases had haemorrhage already, including 10 cases after abortion, caesarean section or normal labor and other 4 of hydatidiform mole. 3 cases with obstetric haemorrhage tendency included 2 cases of placenta praevia and 1 case of cervical pregnancy. Selective catheterization into bilateral uterine arteries or internal iliac arteries for DSA, showed the cause and location of the haemorrhage and then embolized with gelfoam sponge chips (1-3 mm) or Polyvinyl Alcohol(PVA); and part of the cases with MTX through uterine arterial perfusion. Results: The successful rate of catheterization was 100%. The achievement in 14 cases showed no active haemorrhage immediately after the procedure and no vaginal bleeding after 1-5 days. In 3 prophylactic cases before abortion or uterine curettage, obstetric massive haemorrhage occurred in 1 case, but not so in other 2 cases. Conclusions: TAE is an effective treatment for obstetric massive haemorrhage, with the advantages of minimal trauma, fast and definite treating effect and less complications. Prophylactical application for high risk patients can reduce the bleeding and mortality. (authors)

Cerebellar hemangioblastomas with computed tomographic, angiographic, and positron-emission tomographic evaluations

International Nuclear Information System (INIS)

Kikuchi, Kenji; Sakamoto, Tetsuya; Kowada, Masayoshi; Tamakawa, Yoshiharu; Uemura, Kazuo.

1986-01-01

Ten patients with cerebellar hemangioblastomas were reviewed, and evaluations were made by computed tomography (CT), vertebral angiography, and positron-emission tomography (PET). Cerebellar hemangioblastomas were classified into three types on the basis of their CT appearances: Type I: a cystic tumor without a demonstrable mural nodule; Type II: a cystic tumor with a mural nodule, and Type III: a solid tumor without any cyst formation. All of the cystic tumors classified here as Types I and II were associated with a shift and deformity of the fourth ventricule and an enlarged lateral ventricle, and yet no low-density area in the adjacent cerebellar tissue indicating perifocal edema was demonstrated. By contrast, in the solid hemangioblastomas designated as Type III, finger-shaped, low-density areas were visualized around the enhancing mass lesion, extending to the white matter of the entire affected cerebellar hemisphere. The vertebral angiographic classification of cerebellar hemangioblastomas was also attempted as follows: Type I: an avascular tumor without a demonstrable mural nodule; Type II: an avascular tumor with a mural nodule, and Type III: a solid vascular tumor with enlarged feeding arteries and distinct draining veins. In Type II, a relatively small mural nodule was visualized, fed mostly by a single feeding artery, and the tumor stain was at its peak at the arterial phase. No draining vein was opacified in most cases. In contrast, solid tumors classified as Type III were demonstrated to be hypervascular tumors with a multiplicity of feeding arteries and draining veins. The vascular mass remained to be opacified through the venous phase with delayed blood circulation. PET was performed on a 31-year-old male with a solid hemangioblastoma. (J.P.N)

Integrated Comprehensive Care - A Case Study in Nursing Leadership and System Transformation.

Science.gov (United States)

Wheatley, Laura; Doyle, Winnie; Evans, Cheryl; Gosse, Carolyn; Smith, Kevin

2017-01-01

Calls for transformational change of our healthcare system are increasingly clear, persuasive and insistent. They resonate at all levels, with those who fund, deliver, provide and receive care, and they are rooted in a deep understanding that the system, as currently rigidly structured, most often lacks the necessary flexibility to comprehensively meet the needs of patients across the continuum of care. The St. Joseph's Health System (SJHS) Integrated Comprehensive Care (ICC) Program, which bundles care and funding across the hospital to home continuum, has reduced fragmentation of care, and it has delivered improved outcomes for patients, providers and the system. This case study explores the essential contribution of nursing leadership to this successful transformation of healthcare service delivery.

An Exploratory Study of Reading Comprehension in College Students After Acquired Brain Injury.

Science.gov (United States)

Sohlberg, McKay Moore; Griffiths, Gina G; Fickas, Stephen

2015-08-01

This exploratory study builds on the small body of existing research investigating reading comprehension deficits in college students with acquired brain injury (ABI). Twenty-four community college students with ABI completed a battery of questionnaires and standardized tests to characterize self-perceptions of academic reading ability, performance on a standardized reading comprehension measure, and a variety of cognitive functions of this population. Half of the participants in the sample reported traumatic brain injury (n = 12) and half reported nontraumatic ABI (n = 12). College students with both traumatic and nontraumatic ABI cite problems with reading comprehension and academic performance postinjury. Mean performance on a standardized reading measure, the Nelson-Denny Reading Test (Brown, Fischo, & Hanna, 1993), was low to below average and was significantly correlated with performance on the Speed and Capacity of Language Processing Test (Baddeley, Emslie, & Nimmo-Smith, 1992). Injury status of traumatic versus nontraumatic ABI did not differentiate results. Regression analysis showed that measures of verbal attention and suppression obtained from the California Verbal Language Test-II (Delis, Kramer, Kaplan, & Ober, 2000) predicted total scores on the Nelson-Denny Reading Test. College students with ABI are vulnerable to reading comprehension problems. Results align with other research suggesting that verbal attention and suppression problems may be contributing factors.

Important considerations in lesion-symptom mapping: Illustrations from studies of word comprehension.

Science.gov (United States)

Shahid, Hinna; Sebastian, Rajani; Schnur, Tatiana T; Hanayik, Taylor; Wright, Amy; Tippett, Donna C; Fridriksson, Julius; Rorden, Chris; Hillis, Argye E

2017-06-01

Lesion-symptom mapping is an important method of identifying networks of brain regions critical for functions. However, results might be influenced substantially by the imaging modality and timing of assessment. We tested the hypothesis that brain regions found to be associated with acute language deficits depend on (1) timing of behavioral measurement, (2) imaging sequences utilized to define the "lesion" (structural abnormality only or structural plus perfusion abnormality), and (3) power of the study. We studied 191 individuals with acute left hemisphere stroke with MRI and language testing to identify areas critical for spoken word comprehension. We use the data from this study to examine the potential impact of these three variables on lesion-symptom mapping. We found that only the combination of structural and perfusion imaging within 48 h of onset identified areas where more abnormal voxels was associated with more severe acute deficits, after controlling for lesion volume and multiple comparisons. The critical area identified with this methodology was the left posterior superior temporal gyrus, consistent with other methods that have identified an important role of this area in spoken word comprehension. Results have implications for interpretation of other lesion-symptom mapping studies, as well as for understanding areas critical for auditory word comprehension in the healthy brain. We propose that lesion-symptom mapping at the acute stage of stroke addresses a different sort of question about brain-behavior relationships than lesion-symptom mapping at the chronic stage, but that timing of behavioral measurement and imaging modalities should be considered in either case. Hum Brain Mapp 38:2990-3000, 2017. © 2017 Wiley Periodicals, Inc. © 2017 Wiley Periodicals, Inc.

Comprehension of metaphors and idioms in patients with Alzheimer's disease: a longitudinal study.

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Papagno, C

2001-07-01

Language in patients with Alzheimer's disease has been extensively studied, with the exception of non-literal language comprehension. However, in our speech, we often make use of expressions, which are not necessarily interpreted on a literal ground. Comprehension of metaphors and idioms was examined in 39 patients with probable early Alzheimer's disease. The results showed that the decline of figurative language is not an early symptom of dementia and can occur independently from the impairment of propositional language. It was also found that metaphors and idioms differ as far as the predominant kind of error is concerned.

Syntactic comprehension in reading and listening: a study with French children with dyslexia.

Science.gov (United States)

Casalis, Séverine; Leuwers, Christel; Hilton, Heather

2013-01-01

This study examined syntactic comprehension in French children with dyslexia in both listening and reading. In the first syntactic comprehension task, a partial version of the Epreuve de Compréhension syntaxico-sémantique (ECOSSE test; French adaptation of Bishop's test for receptive grammar test) children with dyslexia performed at a lower level in the written but not in the spoken modality, compared to reading age-matched children, suggesting a difficulty in handling syntax while reading. In the second task, syntactic processing was further explored through a test of relative clause processing, in which inflectional markers could aid in attributing roles to the elements in a complex syntactic structure. Children with dyslexia were insensitive to inflectional markers in both reading and listening, as was the reading age control group, while only the older normal reader group appeared to make use of the inflectional markers. Overall, the results support the hypothesis that difficulties in comprehension in dyslexia are strongly related to poor reading skills.

Comprehensive studies on irradiated single-crystal diamond sensors

Energy Technology Data Exchange (ETDEWEB)

Stegler, Martin [DESY, Zeuthen (Germany)

2015-07-01

Single-crystal diamond sensors are used as part of the Beam and Radiation Instrumentation and Luminosity (BRIL) projects of the CMS experiment. Due to an upgrade of the Fast Beam Conditions Monitor (BCM1F) these diamond sensors are exchanged and the irradiated ones are now used for comprehensive studies. Current over voltage (IV), current over time (CT) and charge collection efficiency (CCE) measurements were performed for a better understanding of the radiation damage incurred during operation and to compensate in the future. The effect of illumination with various light sources on the charge collection efficiency was investigated and led to interesting results. Intensity and wavelength of the light were varied for deeper insight of polarization effects.

Exercise left ventricular performance in patients with chest pain, ischemic-appearing exercise electrocardiograms, and angiographically normal coronary arteries

International Nuclear Information System (INIS)

Berger, H.J.; Sands, M.J.; Davies, R.A.; Wackers, F.J.; Alexander, J.; Lachman, A.S.; Williams, B.W.; Zaret, B.L.

1981-01-01

Left ventricular performance was evaluated using first-pass radionuclide angiocardiography in 31 patients with chest pain, an ischemic-appearing exercise electrocardiogram, and angiographically normal coronary arteries at rest and during maximal upright bicycle exercise. 201 Tl imaging was done in all patients after treadmill exercise and in selected patients after ergonovine provocation. Resting left ventricular performance was normal in all patients. An abnormal ejection fraction response to exercise was detected in 12 of 31 patients. Regional dysfunction was present during exercise in four patients, all of whom also had abnormal global responses. Three of these 12 patients and two additional patients had exercise-induced 201 Tl perfusion defects. In all nine patients who underwent ergonovine testing, there was no suggestion of coronary arterial spasm. Thus, left ventricular dysfunction during exercise, in the presence of normal resting performance, was found in a substantial number of patients with chest pain, an ischemic-appearing exercise electrocardiogram, and normal coronary arteries

Idiom Comprehension in Mandarin-Speaking Children

Science.gov (United States)

Hsieh, Shelley Ching-Yu; Hsu, Chun-Chieh Natalie

2010-01-01

This study examines the effect of familiarity, context, and linguistic convention on idiom comprehension in Mandarin speaking children. Two experiments (a comprehension task followed by a comprehension task coupled with a metapragmatic task) were administered to test participants in three age groups (6 and 9-year-olds, and an adult control group).…

The 3R study strategy to improve text retention and text comprehension

NARCIS (Netherlands)

Reijners, Pauline; Kester, Liesbeth; Wetzels, Sandra; Kirschner, Paul A.

2013-01-01

Reijners, P. B. G., Kester, L., Wetzels, S. A. J., & Kirschner, P. A. (2013, 27 August). The 3R study strategy to improve text retention and text comprehension. In B. Klein (Chair), Effective Learning Strategies and their Usage in Self-regulated Training Programs and Computer-Based Learning.

The Effect of the Cherry Hill Study Skills Program on Eighth Grade Students' Reading Comprehension and Study Skills.

Science.gov (United States)

La Marca, Marilyn Tierney

A study was conducted to determine the effects of the "Cherry Hill Study Skills Program" on eighth grade students' reading comprehension and study skills. The "Cherry Hill Study Skills Program" is a process oriented course dealing with the sequential development of nine specific skills deemed essential to the retrieval and retention of information…

Enhancing Social Studies Vocabulary and Comprehension for Seventh-Grade English Language Learners: Findings from Two Experimental Studies

Science.gov (United States)

Vaughn, Sharon; Martinez, Leticia R.; Linan-Thompson, Sylvia; Reutebuch, Colleen K.; Carlson, Coleen D.; Francis, David J.

2009-01-01

Two experimental studies to improve vocabulary knowledge and comprehension were conducted in 7th-grade social studies classes with English language learners (ELLs). Two different nonoverlapping samples of classes of 7th-grade students (N = 381 and N = 507) were randomly assigned at the classroom (i.e., section) level to a social studies…

Validation of attenuation-corrected equilibrium radionuclide angiographic determinations of right ventricular volume: comparison with cast-validated biplane cineventriculography

International Nuclear Information System (INIS)

Dell'Italia, L.J.; Starling, M.R.; Walsh, R.A.; Badke, F.R.; Lasher, J.C.; Blumhardt, R.

1985-01-01

To determine the accuracy of attenuation-corrected equilibrium radionuclide angiographic determinations of right ventricular volumes, the authors initially studied 14 postmortem human right ventricular casts by water displacement and biplane cineventriculography. Biplane cineventriculographic right ventricular cast volumes, calculated by a modification of Simpson's rule algorithm, correlated well with right ventricular cast volumes measured by water displacement (r = .97, y = 8 + 0.88x, SEE = 6 ml). Moreover, the mean volumes obtained by both methods were no different (73 +/- 28 vs 73 +/- 25 ml). Subsequently, they studied 16 patients by both biplane cineventriculography and equilibrium radionuclide angiography. The uncorrected radionuclide right ventricular volumes were calculated by normalizing background corrected end-diastolic and end-systolic counts from hand-drawn regions of interest obtained by phase analysis for cardiac cycles processed, frame rate, and blood sample counts. Attenuation correction was performed by a simple geometric method. The attenuation-corrected radionuclide right ventricular end-diastolic volumes correlated with the cineventriculographic end-diastolic volumes (r = .91, y = 3 + 0.92x, SEE = 27 ml). Similarly, the attenuation-corrected radionuclide right ventricular end-systolic volumes correlated with the cineventriculographic end-systolic volumes (r = .93, y = - 1 + 0.91x, SEE = 16 ml). Also, the mean attenuation-corrected radionuclide end-diastolic and end-systolic volumes were no different than the average cineventriculographic end-diastolic and end-systolic volumes (160 +/- 61 and 83 +/- 44 vs 170 +/- 61 and 86 +/- 43 ml, respectively)

Study on comprehensive evaluation methods for nuclear fuel cycle

International Nuclear Information System (INIS)

Arie, Kazuo

1999-03-01

This investigation on comprehensive-evaluation-methods for nuclear fuel cycle has been performed through open-literature search. As the results, no proper comprehensive-evaluation-method has been found which integrate several factors to be considered into only one factor. In the evaluation of future advanced nuclear energy systems, it is required to evaluate from both view points of natural resources and natural environment, in addition to the other factors such as safety, economy, and proliferation resistance. It is recommended that clarification of specific items or targets to be evaluated is most important as the first thing to be done. Second, methodology for the evaluation should be discussed. (author)

Clinical and angiographic characteristics of acute myocardial infarction caused by vasospastic angina without organic coronary heart disease

International Nuclear Information System (INIS)

Kim, Pum-Joon; Seung, Ki-Bae; Kim, Dong-Bin

2007-01-01

Vasospastic angina (VA) can occasionally cause acute myocardial infarction (AMI). From January 2003 to June 2005, coronary spastic angina was diagnosed in 292 patients by performing spasm provocation tests. Among the 292 patients, 21 (7.2% of all the VA patients) had an AMI. There were 20 patients who initially visited the emergency room for AMI without suffering prior VA. One patient with a history of VA had an AMI when he discontinued his medication. Among the 21 VA patients with AMI, 14 had experienced severe emotional stress before they visited the emergency room. The spasm provocation test showed that the VA patients with AMI had more multivessel and diffuse spasm than the VA patients without AMI (p<0.001). Clinically, the VA patients with AMI usually had their first symptom of VA as the severe chest pain of AMI. Two-thirds of the VA patients with AMI had experienced emotional stress before their AMI. Angiographically, the spasm provocation test for VA patients with AMI showed more multivessel and diffuse spasm than in VA patients without AMI. (author)

Radionuclide angiographic evaluation of left ventricular performance at rest and during exercise in patients with aortic regurgitation

International Nuclear Information System (INIS)

Iskandrian, A.S.; Heo, J.

1986-01-01

Radionuclide angiographic evaluation of LV performance at rest and during exercise in patients with AR have shown that an abnormal EF response to exercise may be observed in asymptomatic patients with normal resting LV function. The EF response to exercise has been correlated with a number of clinical and exercise measurements; important among these are the slope of the systolic pressure-to-end-systolic volume, end-systolic volume, cardiac index, pulmonary capillary wedge pressure, and wall stress. The changes in the regurgitant fraction, EF, and LV volume have shown considerable individual variability; they have also allowed a better understanding of the circulatory responses during exercise. Radionuclide angiography provides a reliable and reproducible method of measuring the rest LVEF that is important in the timing and the outcome of valve replacement. The value of the EF response to exercise in patient management is not yet clear; it is possible that other radionuclide-derived measurements at rest or during exercise, such as the systolic pressure-to-end-systolic volume relationship, and the end-systolic volume may provide complementary information to that provided by the EF

An Exploratory Study of NNES Graduate Students' Reading Comprehension of English Journal Articles

Science.gov (United States)

Chen, Kate Tzu-Ching

2017-01-01

The academic success of non-native English speaker (NNES) graduate students greatly relies on their ability to read and comprehend English journal articles (EJA). The purpose of this study was to identify NNES graduate students' comprehension difficulties and reading strategies when reading EJA. In addition, the study explored how the relationship…

Angiographic CT with intravenous contrast agent application for monitoring of intracranial flow diverting stents

International Nuclear Information System (INIS)

Saake, Marc; Struffert, Tobias; Goelitz, Philipp; Ott, Sabine; Doerfler, Arnd; Seifert, Frank; Ganslandt, Oliver

2012-01-01

Intracranial flow diverting devices are increasingly used to treat cerebral aneurysms. A reliable, non-invasive follow-up modality would be desirable. Our aim was to compare intra-arterial digital subtraction angiography (ia DSA) to angiographic computed tomography with intravenous contrast agent application (iv ACT) in the visualisation of flow diverting devices and aneurysm lumina. Follow-up monitoring by iv ACT (n = 36) and ia DSA (n = 25) in 14 patients treated with flow diverting devices for intracranial aneurysms was evaluated retrospectively. Images were evaluated by two neuroradiologists in anonymous consensus reading regarding the device deployment, wall apposition, neck coverage of the aneurysm, opacification of the vessel and device lumen, as well as the degree of aneurysm occlusion. Corresponding ia DSA and iv ACT images were scored identically in all patients regarding the stent deployment, wall apposition and neck coverage, as well as the degree of aneurysm occlusion and patency status of the device and parent artery. Opacification of the parent vessel lumen and perfused parts of the aneurysm was considered slightly inferior for iv ACT in comparison with ia DSA (seven of 36 cases), without impact on diagnosis. We demonstrated the feasibility and diagnostic value of iv ACT in follow-up imaging of intracranial flow diverting devices. Due to its high spatial resolution and non-invasive character, this novel technique might become a valuable imaging modality in these patients. (orig.)

Angiographic CT: in vitro comparison of different carotid artery stents-does stent orientation matter?

Science.gov (United States)

Lettau, Michael; Bendszus, Martin; Hähnel, Stefan

2013-06-01

Our aim was to evaluate the in vitro visualization of different carotid artery stents on angiographic CT (ACT). Of particular interest was the influence of stent orientation to the angiography system by measurement of artificial lumen narrowing (ALN) caused by the stent material within the stented vessel segment to determine whether ACT can be used to detect restenosis within the stent. ACT appearances of 17 carotid artery stents of different designs and sizes (4.0 to 11.0 mm) were investigated in vitro. Stents were placed in different orientations to the angiography system. Standard algorithm image reconstruction and stent-optimized algorithm image reconstruction was performed. For each stent, ALN was calculated. With standard algorithm image reconstruction, ALN ranged from 19.0 to 43.6 %. With stent-optimized algorithm image reconstruction, ALN was significantly lower and ranged from 8.2 to 18.7 %. Stent struts could be visualized in all stents. Differences in ALN between the different stent orientations to the angiography system were not significant. ACT evaluation of vessel patency after stent placement is possible but is impaired by ALN. Stent orientation of the stents to the angiography system did not significantly influence ALN. Stent-optimized algorithm image reconstruction decreases ALN but further research is required to define the visibility of in-stent stenosis depending on image reconstruction.

Sequential Coherence in Sentence Pairs Enhances Imagery during Comprehension: An Individual Differences Study.

Directory of Open Access Journals (Sweden)

Carol Madden-Lombardi

Full Text Available The present study investigates how sequential coherence in sentence pairs (events in sequence vs. unrelated events affects the perceived ability to form a mental image of the sentences for both auditory and visual presentations. In addition, we investigated how the ease of event imagery affected online comprehension (word reading times in the case of sequentially coherent and incoherent sentence pairs. Two groups of comprehenders were identified based on their self-reported ability to form vivid mental images of described events. Imageability ratings were higher and faster for pairs of sentences that described events in coherent sequences rather than non-sequential events, especially for high imagers. Furthermore, reading times on individual words suggested different comprehension patterns with respect to sequence coherence for the two groups of imagers, with high imagers activating richer mental images earlier than low imagers. The present results offer a novel link between research on imagery and discourse coherence, with specific contributions to our understanding of comprehension patterns for high and low imagers.

The role of action knowledge in the comprehension of artefacts - a PET study

DEFF Research Database (Denmark)

Gerlach, Christian; Law, Ian; Gade, Anders

2002-01-01

and two naming tasks divided by category (natural objects vs artefacts). The left PMv (BA 6/44) was more activated by the categorization task for artefacts than by the categorization task for natural objects and the naming task for artefacts. However, the left PMv was not associated with the contrast......Activation of the left ventral premotor cortex (PMv) has in previous imaging studies been associated with the processing of visually presented artefacts. It has been suggested that this activation reflects processing of action knowledge and that action knowledge contributes to the comprehension...... of artefacts. The purpose of the present study was to test whether activation of the left PMv is common for all tasks involving the comprehension of artefacts or whether it is task specific. This was done by comparing performance and regional cerebral blood flow (rCBF) associated with two categorization tasks...

Text comprehension strategy instruction with poor readers

NARCIS (Netherlands)

Van den Bos, K.P.; Aarnoudse, C.C.; Brand-Gruwel, S.

1998-01-01

The goal of this study was to investigate the effects of teaching text comprehension strategies to children with decoding and reading comprehension problems and with a poor or normal listening ability. Two experiments are reported. Four text comprehension strategies, viz., question generation,

Pedagogical Practices in Teaching Reading Comprehension: A Case Study of Three EFL Teachers in a Secondary School in Ethiopia

Science.gov (United States)

Nurie, Yenus

2017-01-01

Various studies investigating psychological variables associated with reading comprehension are currently available. However, there has been little linguistic research conducted to examine the pedagogical practices of teachers in teaching reading comprehension of EFL Secondary Schools, Ethiopia. The present study was conducted to fill the research…

Optimizing Visually-Assisted Listening Comprehension

Science.gov (United States)

Kashani, Ahmad Sabouri; Sajjadi, Samad; Sohrabi, Mohammad Reza; Younespour, Shima

2011-01-01

The fact that visual aids such as pictures or graphs can lead to greater comprehension by language learners has been well established. Nonetheless, the order of presenting visuals to listeners is left unattended. This study examined listening comprehension from a strategy of introducing visual information, either prior to or during an audio…

Impact of Advanced Age on Procedural and Acute Angiographic Outcomes in Patients Treated for Peripheral Artery Disease With Orbital Atherectomy: A CONFIRM Registries Subanalysis.

Science.gov (United States)

Lee, Michael S; Beasley, Robert; Adams, George L

2015-08-01

Data on the outcomes of elderly patients with peripheral arterial disease (PAD) who undergo orbital atherectomy are limited. This analysis compares the procedural and acute angiographic outcomes of PAD patients treated with orbital atherectomy stratified by age (≥ 75 years of age [elderly] vs atherectomy. The composite rate of adverse events including dissection, perforation, slow flow, vessel closure, spasm, embolism, and thrombus formation was compared between groups. Elderly patients had a higher proportion of females (47.5% vs 35.3%; Patherectomy resulted in similar composite rates of adverse events despite the elderly having unfavorable baseline Rutherford classification and lesion characteristics. The higher rate of perforation may be explained by longer and more below-the-knee lesions.

Comprehensive Psychiatric Evaluation

Science.gov (United States)

... Facts for Families Guide Facts for Families - Vietnamese Comprehensive Psychiatric Evaluation No. 52; Updated October 2017 Evaluation ... with serious emotional and behavioral problems need a comprehensive psychiatric evaluation. Comprehensive psychiatric evaluations usually require a ...

Preparing for reading comprehension: Fostering text comprehension skills in preschool and early elementary school children

Directory of Open Access Journals (Sweden)

Paul van den Brook

2011-07-01

Full Text Available To understand what they read or hear, children and adults must create a coherent mental representation of presented information. Recent research suggests that the ability to do so starts to develop early –well before reading age- and that early individual differences are predictive of later reading-comprehension performance. In this paper, we review this research and discuss potential applications to early intervention. We then present two exploratory studies in which we examine whether it is feasible to design interventions with early readers (3rd grade and even toddlers (2-3 years old. The interventions employed causal questioning techniques as children listen to orally presented, age-appropriate narratives. Afterwards, comprehension was tested through question answering and recall tasks. Results indicate that such interventions are indeed feasible. Moreover, they suggest that for both toddlers and early readers questions during comprehension are more effective than questions after comprehension. Finally, for both groups higher working memory capacity was related to better comprehension.

A Comprehensive Framework for Information Technology Governance and Localizing it for Automotive Industry of Iran (Case Study: ATLAS Automotive Holding

Directory of Open Access Journals (Sweden)

Mohammad Mosakhani

2017-03-01

Full Text Available Due to the absence of a comprehensive framework for IT governance, the main objective of the study is to identify all components of IT governance and present them in the form of a comprehensive IT governance framework .The localization of provided framework for the automotive industry is the secondary objective of the study. In this regard, the research questions are: what is the comprehensive framework of IT governance? What are the components and dimensions of a comprehensive framework of IT governance? What is the localized comprehensive framework of IT governance for the Iranian automotive industry? All researches on IT governance were investigated using meta-synthesis qualitative method and were limited to 96 selected articles by performing a meta-synthesis process. Then, the five categories, 19 concepts and 79 codes of IT governance were identified through detailed study of these articles. Then, a comprehensive framework of IT governance was presented. For localizing, a questionnaire designed based on the identified IT governance components, and distributed among the automotive industry experts. Statistical hypothesis testing of collected data led to the rejection of cross/functional job rotation component in the automotive industry. To demonstrate the applicability of the framework, the IT governance status of ATLAS holding company was evaluated based on the comprehensive framework that localized for automotive industry.

The Effect of Comprehensible Input and Comprehensible Output on the Accuracy and Complexity of Iranian EFL Learners’ Oral Speech

Directory of Open Access Journals (Sweden)

omid tabatabaie

2009-10-01

Full Text Available This study aimed at investigating the relative impact of comprehensible input and comprehensible output on the development of grammatical accuracy and syntactic complexity of Iranian EFL learners’ oral production. Participants were 60 female EFL learners selected from a whole population pool of 80 based on the standard test of IELTS. To investigate the research questions, the participants were randomly divided into three groups: Input group, output group, and control group. The study involved two phases: the pre-task phase, and the main-task phase. During the pre-task phase, the input group received comprehensible input. In the same phase, the output group was pushed to be engaged in comprehensible output production. The control group neither received input, nor was engaged in output production. In the main-task phase, all subjects performed monologues that were separately recorded, and later transcribed and coded in terms of accuracy and complexity through Bygate's (2001 standard coding system and finally scored. The statistical analysis of the results revealed that while the output group outperformed the input group in grammatical accuracy, the input group proved to be more rigorous and influential in developing speech complexity. The study supports Swain’s (1985 claim that there are roles for comprehensible output that are different from and independent of comprehensible input, and Skehan & Foster's (2001 theory regarding human beings’ limited attentional capacities that can be devoted to one aspect of oral speech at the expense of the other. Generally, it is implied that the most effective way for improving oral speech, based on the literature and the results obtained from this study, is an eclectic approach which conflates both comprehensible input and comprehensible output.

Children's hypertext comprehension

NARCIS (Netherlands)

Segers, P.C.J.; Segers, E.; Broek, P. van den

2017-01-01

The present chapter gives an overview of the literature on hypertext comprehension, children's hypertext comprehension and individual variation therein, ending with a perspective for future research. Hypertext comprehension requires the reader to make bridging inferences between the different parts

Teachers’ Thoughts and Students’ Strategies : An empirical study on Swedish upper-secondary students’ andteachers’ perception on reading comprehension

OpenAIRE

Sibahi, Samir

2017-01-01

Previous studies have shown that explicit reading strategy teaching has positive effects on English second language (ESL) students’ reading comprehension. However, Swedish upper- secondary students’ attitudes towards English reading comprehension classes are relatively unknown. This study therefore has the objectives of finding out to what extent reading strategies are taught explicitly in upper-secondary schools in Sweden, and to investigate how students and teachers perceive reading compreh...

A Comprehensive HIV Stigma-reduction and Wellness-enhancement Community Intervention: A Case Study.

NARCIS (Netherlands)

French, H.; Greeff, M.; Watson, M.J.; Doak, C.M.

2014-01-01

We describe the implementation of a comprehensive HIV stigma-reduction and wellness-enhancement community intervention that focused on people living with HIV (PLWH), as well as people living close to them (PLC) from six designated groups. A holistic multiple case study design was used in urban and

Is Word-Problem Solving a Form of Text Comprehension?

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Fuchs, Lynn S.; Fuchs, Douglas; Compton, Donald L.; Hamlett, Carol L.; Wang, Amber Y.

2015-01-01

This study's hypotheses were that (a) word-problem (WP) solving is a form of text comprehension that involves language comprehension processes, working memory, and reasoning, but (b) WP solving differs from other forms of text comprehension by requiring WP-specific language comprehension as well as general language comprehension. At the start of…

A Comparative Study of Listening Comprehension Measures in English as an Additional Language and Native English-Speaking Primary School Children

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McKendry, Mairead Grainne; Murphy, Victoria A.

2011-01-01

The aim of this study was to investigate the suitability of different measures of listening comprehension for Years 2, 3 and 4 children with English as an additional language (EAL). Non-standardised uses of reading comprehension measures are often employed as proxy measures of listening comprehension, i.e. for purposes for which they were not…

Improving participant comprehension in the informed consent process.

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Cohn, Elizabeth; Larson, Elaine

2007-01-01

To critically analyze studies published within the past decade about participants' comprehension of informed consent in clinical research and to identify promising intervention strategies. Integrative review of literature. The Cumulative Index of Nursing and Allied Health Literature (CINAHL), PubMed, and the Cochrane Database of Systematic Reviews and Cochrane Central Register of Controlled Trials were searched. Inclusion criteria included studies (a) published between January 1, 1996 and January 1, 2007, (b) designed as descriptive or interventional studies of comprehension of informed consent for clinical research, (c) conducted in nonpsychiatric adult populations who were either patients or volunteer participants, (d) written in English, and (e) published in peer-reviewed journals. Of the 980 studies identified, 319 abstracts were screened, 154 studies were reviewed, and 23 met the inclusion criteria. Thirteen studies (57%) were descriptive, and 10 (43%) were interventional. Interventions tested included simplified written consent documents, multimedia approaches, and the use of a trained professional (consent educator) to assist in the consent process. Collectively, no single intervention strategy was consistently associated with improved comprehension. Studies also varied in regard to the definition of comprehension and the tools used to measure it. Despite increasing regulatory scrutiny, deficiencies still exist in participant comprehension of the research in which they participate, as well as differences in how comprehension is measured and assessed. No single intervention was identified as consistently successful for improving participant comprehension, and results indicated that any successful consent process should at a minimum include various communication modes and is likely to require one-to-one interaction with someone knowledgeable about the study.

Direct and mediated effects of language and cognitive skills on comprehension of oral narrative texts (listening comprehension) for children.

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Kim, Young-Suk Grace

2016-01-01

We investigated component language and cognitive skills of oral language comprehension of narrative texts (i.e., listening comprehension). Using the construction-integration model of text comprehension as an overarching theoretical framework, we examined direct and mediated relations of foundational cognitive skills (working memory and attention), foundational language skills (vocabulary and grammatical knowledge), and higher-order cognitive skills (inference, theory of mind, and comprehension monitoring) to listening comprehension. A total of 201 first grade children in South Korea participated in the study. Structural equation modeling results showed that listening comprehension is directly predicted by working memory, grammatical knowledge, inference, and theory of mind and is indirectly predicted by attention, vocabulary, and comprehension monitoring. The total effects were .46 for working memory, .07 for attention, .30 for vocabulary, .49 for grammatical knowledge, .31 for inference, .52 for theory of mind, and .18 for comprehension monitoring. These results suggest that multiple language and cognitive skills make contributions to listening comprehension, and their contributions are both direct and indirect. Copyright © 2015 Elsevier Inc. All rights reserved.

Clinical and angiographic outcomes after stent-assisted coiling of cerebral aneurysms with Enterprise and Neuroform stents: a comparative analysis of the literature.

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King, Brent; Vaziri, Sasha; Singla, Amit; Fargen, Kyle M; Mocco, J

2015-12-01

The most widely used intracranial stents for stent-assisted coiling are Neuroform (NEU) and Enterprise stents (ENT). This study compares published outcomes between the ENT and NEU coil-assist systems and comments on the published safety and efficacy of stent-assisted coiling in general. A literature search was performed through PubMed for all published series of ENT or NEU stent-assisted coiling of cerebral aneurysms from 2004 to 2014. All studies including 10 or more published cases of stent-assisted coiling with ENT or NEU were included. 47 studies met the inclusion criteria, containing 4238 aneurysms in 4039 patients. 2111 aneurysms were treated with NEU and 2127 were treated with ENT. Mean follow-up was 14.1 months. Overall, thromboembolic events occurred in 6.4% of aneurysms, intracranial hemorrhage (ICH) in 2.6%, permanent morbidity in 3.9%, and mortality in 2.3%. Initial and final 100% angiographic occlusion was seen in 53% and 69% of patients, respectively. Deployment failures (pstent-assisted coiling devices to date, containing over 4200 aneurysms in more than 4000 patients. Comparative analyses demonstrate that both devices are reported to be safe and effective with comparable permanent morbidity. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/

Angiographic patterns of in-stent restenosis classified by computed tomography in patients with drug-eluting stents: correlation with invasive coronary angiography

International Nuclear Information System (INIS)

Pan, Jingwei; Lu, Zhigang; Wei, Meng; Zhang, Jiayin; Li, Minghua

2013-01-01

To evaluate the diagnostic accuracy of Mehran's in-stent restenosis (ISR) classification by coronary computed angiography (CCTA), with reference to invasive coronary angiography (ICA). Consecutive symptomatic patients, who had clinically suspected ISR and implanted stent diameter ≥ 3 mm, were prospectively enrolled in our study. Mehran's classification was employed by CCTA and ICA to classify ISR lesions into four subtypes: focal, diffuse intrastent, diffuse proliferative and total occlusion. CCTA and ICA measurement of lesion length was further compared. Sixty-one patients with 101 implanted stents were included in our study. The overall sensitivity, specificity, PPV and NPV of CCTA diagnosis of binary ISR, as shown by patient-based analysis (n = 61), were 100 % (49/49), 75 % (8/12), 92.45 % (49/53) and 100 % (8/8) respectively. Mehran's classification of CCTA correlated well with ICA findings. The diagnostic accuracy of CCTA for class I, class II, class III and class IV lesions was 92.5 %, 91.67 %, 100 % and 100 % respectively. Lesion length was assessed to be significantly longer with CCTA than with ICA (11.03 ± 5.89 mm versus 8.56 ± 4.99 mm, P < 0.001). Angiographic patterns of in-stent restenosis can be accurately classified by coronary computed angiography. The lesion length measured by CCTA is longer than that assessed by invasive coronary angiography. (orig.)

Promoting Acceleration of Comprehension and Content through Text in High School Social Studies Classes

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Wanzek, Jeanne; Swanson, Elizabeth A.; Roberts, Greg; Vaughn, Sharon; Kent, Shawn C.

2015-01-01

The purpose of this study was to evaluate the efficacy of Promoting Acceleration of Comprehension and Content Through Text intervention implemented with 11th-grade students enrolled in U.S. History classes. Using a within-teacher randomized design, the study was conducted in 41 classes (23 treatment classes) with 14 teachers providing the…

Testing audiovisual comprehension tasks with questions embedded in videos as subtitles: a pilot multimethod study

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Juan Carlos Casañ Núñez

2017-06-01

Full Text Available Listening, watching, reading and writing simultaneously in a foreign language is very complex. This paper is part of wider research which explores the use of audiovisual comprehension questions imprinted in the video image in the form of subtitles and synchronized with the relevant fragments for the purpose of language learning and testing. Compared to viewings where the comprehension activity is available only on paper, this innovative methodology may provide some benefits. Among them, it could reduce the conflict in visual attention between watching the video and completing the task, by spatially and temporally approximating the questions and the relevant fragments. The technique is seen as especially beneficial for students with a low proficiency language level. The main objectives of this study were to investigate if embedded questions had an impact on SFL students’ audiovisual comprehension test performance and to find out what examinees thought about them. A multimethod design (Morse, 2003 involving the sequential collection of three quantitative datasets was employed. A total of 41 learners of Spanish as a foreign language (SFL participated in the study (22 in the control group and 19 in the experimental one. Informants were selected by non-probabilistic sampling. The results showed that imprinted questions did not have any effect on test performance. Test-takers’ attitudes towards this methodology were positive. Globally, students in the experimental group agreed that the embedded questions helped them to complete the tasks. Furthermore, most of them were in favour of having the questions imprinted in the video in the audiovisual comprehension test of the final exam. These opinions are in line with those obtained in previous studies that looked into experts’, SFL students’ and SFL teachers’ views about this methodology (Casañ Núñez, 2015a, 2016a, in press-b. On the whole, these studies suggest that this technique has

Blunt renal trauma: comparison of contrast-enhanced CT and angiographic findings and the usefulness of transcatheter arterial embolization

International Nuclear Information System (INIS)

Kitase, M.; Mizutani, M.; Tomita, H.; Kono, T.; Sugie, C.; Shibamoto, Y.

2007-01-01

Full text: Background: The purpose of this study was to evaluate the role of contrast-enhanced CT and the usefulness of super selective embolization therapy in the management of arterial damage in patients with severe blunt renal trauma. Patients and Methods: Nine cases of severe renal trauma were evaluated. In all cases, we compared contrast enhanced CT findings with angiographic findings, and performed transcatheter arterial embolization (TAE) in six of them with microcoils and gelatin sponge particles. Morphological changes in the kidney and site of infarction after TAE were evaluated on follow-up CT Chronological changes in blood biochemistry findings after injury, degree of anemia and renal function were investigated. Adverse effects or complications such as duration of hematuria, fever, abdominal pain, renovascular hypertension and abscess formation were also evaluated. Results: The CT finding of extravasation was a reliable sign of active bleeding and useful for determining the indication of TAE. In all cases, bleeding was effectively controlled with super selective embolization. There was minimal procedure-related loss of renal tissue. None of the patients developed abscess, hypertension or other complications. Conclusions: In blunt renal injury, contrast-enhanced CT was useful for diagnosing arterial hemorrhage. Arterial bleeding may produce massive hematoma and TAE was a useful treatment for such cases. By using selective TAE for a bleeding artery, it was possible to minimize renal parenchymal damage, with complications of TAE rarely seen. (author)

The Erasme Study: A Multicenter Study on the Safety and Technical Results of the Palmaz Stent Used for the Treatment of Atherosclerotic Ostial Renal Artery Stenosis

International Nuclear Information System (INIS)

Bakker, Jeannette; Goffette, Pierre P.; Henry, Michel; Mali, Willem P.T.M.; Melki, Jean-Pierre; Moss, Jon G.; Rabbia, Claudio; Therasse, Eric; Thomson, Kenneth R.; Thurnher, Siegfried; Vignali, Claudio

1999-01-01

Purpose: To assess, in a multicenter setting, safety, technical results, and restenosis rate of the Palmaz stent for treatment of atherosclerotic ostial renal artery stenosis. Methods: Ten centers enrolled 106 patients (120 treated renal artery stenoses) in the study. Patient selection was based on unsuccessful percutaneous transluminal renal angioplasty (residual stenosis ≥ 20%) performed for treatment of ostial stenosis ≥ 50%, in patients with hypertension and/or impaired renal function. Safety was assessed by means of the complication rate, and technical results by the number of successful stent placements and occurrence of restenosis (>50%) at intraarterial angiographic follow-up. Results: Stent placement was successful (n = 112) or partially successful (n = 5) in 117 (98%) arteries. Complications occurred in 19 procedures; seven were of serious clinical significance. Angiographic follow-up was performed in 89 of 117 (76%) cases, at a mean of 8 months (range 2.5-18 months). Fifteen stents (16.9%) showed restenosis (at a mean of 8.5 months), of which 10 were successfully redilated. Conclusion: Renal artery stenting has a high technical success rate, a complication rate comparable to percutaneous transluminal renal angioplasty, and a low rate of restenosis at 8 months angiographic follow-up

Applying Language Learning Strategies in the Foreign Language Listening Comprehension: A Study of Islamic Senior High School Students

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DIAN PERTIWI

2018-05-01

Full Text Available The main purpose of the present study was to empirically investigate the possible correlation and the influence between students’ language learning strategies and listening comprehension. The population of this study was 138 eleventh grade students of Islamic Senior High School number 2 Palembang. The sample was all of eleventh grade students in social class. The total number of the student was 138. Since 16 students were absent, so the sample consisted of 122 students. To collect the data in order to measure the students’ language learning strategies and listening comprehension, SILL (strategy inventory in learning language and listening comprehension test from TOEFL Junior test were used in this study. The Pearson correlation was used in analyzing the data using SPSS 16. The result from questionnaire showed that most of the students used metacognitive strategies were in medium level and sometimes used language learning strategies. The result from listening comprehension test showed that most of the students were in very poor level. Furthermore, there was no significant correlation between the two variables that can be seen from the correlation coefficient or r-obtained (-.011 was lower than r-table (0.1779 then the level of probability or sig. value (.902 was higher than .05. From the result, it can be concluded that there was no significant correlation between language learning strategies and listening comprehension of eleventh grade students of Islamic Senior High School number 2 Palembang.

Design considerations for a new, high resolution Micro-Angiographic Fluoroscope based on a CMOS sensor (MAF-CMOS).

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Loughran, Brendan; Swetadri Vasan, S N; Singh, Vivek; Ionita, Ciprian N; Jain, Amit; Bednarek, Daniel R; Titus, Albert; Rudin, Stephen

2013-03-06

The detectors that are used for endovascular image-guided interventions (EIGI), particularly for neurovascular interventions, do not provide clinicians with adequate visualization to ensure the best possible treatment outcomes. Developing an improved x-ray imaging detector requires the determination of estimated clinical x-ray entrance exposures to the detector. The range of exposures to the detector in clinical studies was found for the three modes of operation: fluoroscopic mode, high frame-rate digital angiographic mode (HD fluoroscopic mode), and DSA mode. Using these estimated detector exposure ranges and available CMOS detector technical specifications, design requirements were developed to pursue a quantum limited, high resolution, dynamic x-ray detector based on a CMOS sensor with 50 μm pixel size. For the proposed MAF-CMOS, the estimated charge collected within the full exposure range was found to be within the estimated full well capacity of the pixels. Expected instrumentation noise for the proposed detector was estimated to be 50-1,300 electrons. Adding a gain stage such as a light image intensifier would minimize the effect of the estimated instrumentation noise on total image noise but may not be necessary to ensure quantum limited detector operation at low exposure levels. A recursive temporal filter may decrease the effective total noise by 2 to 3 times, allowing for the improved signal to noise ratios at the lowest estimated exposures despite consequent loss in temporal resolution. This work can serve as a guide for further development of dynamic x-ray imaging prototypes or improvements for existing dynamic x-ray imaging systems.

A Study of Reading Comprehension in Older Children Using Selected Korean Bible Translations

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Kim, Jae Woo

2014-01-01

Problem: The problem of this study was to determine the difference in Bible comprehension scores among gender-based groups of older children using selected passages from three Bible translations: the Children's Bible, the Easy Bible, and the New Revised Korean Bible. Procedures: A total of 288 older children in three churches (Beautiful Baptist…

A Correlation Study between EFL Strategic Listening and Listening Comprehension Skills among Secondary School Students

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Amin, Iman Abdul-Reheem; Amin, Magdy Mohammad; Aly, Mahsoub Abdul-Sadeq

2011-01-01

The present study was undertaken to investigate the correlation between EFL students strategic listening and their listening comprehension skills. Eighty secondary school students participated in this study. Participants' strategic listening was measured by a Strategic Listening Interview (SLI), a Strategic Listening Questionnaire (SLQ) and a…

Improving reading comprehension skills through the SCRATCH program

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Erdal Papatga

2016-09-01

Full Text Available The aim of this study was to reveal how reading comprehension skills of elementary fourth graders who have problems in reading comprehension can be improved by means of the SCRATCH program. The study was designed as a participant action research. It was carried out within a 15-week process at an elementary school with middle socio-economic level in the Eskisehir province in the fall term of the 2015-2016 school year. The participants of the study were eight fourth graders who had problems in reading comprehension and were selected based on the criterion sampling method. Different data gathering tools were employed in different stages of the study. These were the Informal Reading Inventory, readability assessment rubric, participant selection form and identification forms for developmental level in reading comprehension for the quantitative data, and observation notes, a researcher diary, video recordings, teacher and student observation notes, and the projects the students prepared using the SCRATCH program for the qualitative data. In the study, the analysis of the quantitative data was done with correlation analysis, and Kendall W Test that shows inter-rater reliability. In addition, the identification forms for developmental level in reading comprehension were used to reveal the improvement in reading comprehension skills, and the Informal Reading Inventory was employed to score these forms. On the other hand, the qualitative data were analysed through the thematic analysis method, and MAXQDA was used for the analysis. As a result of the analyses, it was found that the reading level of the eight students who had problems in reading comprehension went up from the anxiety level to the instructional level in some forms, and even to the independent reading level in other forms; in other words, there was an improvement in the reading comprehension skills of all eight students.

Klippel-Trenaunay syndrome: the angiographic manifestations and endovascular treatment with pingyangmycin-lipiodol emulsion

International Nuclear Information System (INIS)

Kong Weidong; Li Yanhao; He Xiaofeng; Chen Yong; Zeng Qingle; Zhao Jianbo

2004-01-01

Objective: To observe the angiographic manifestations of Klippel-Trenaunay syndrome (KTS) and to treat it by intra-arterial injection of pingyangmycin-lipiodol emulsion (PLE). Methods: Seven young patients (age range 12-19 years, mean 15.2 years) with KTS in the single low limb were examined by arteriography. Then, PLE (mixed with pingyangmycin 6-12 mg, lipiodol 4-8 ml) was injected by transcatheter into the femoral artery. The effects, side-effects, and complications of the therapy were observed. Results: The arteriography revealed a few distended small arteries with staining of venous sinus of different size in the soft tissue (5/7), as well as drainage vein enlargement (4/7) and superficial varicose vein (5/7). PLE deposited visibly in the abnormal sinus except one case. During 13-30 months' follow-up, 6 cases had good effects on limb hypertrophy after the treatment, and the limbs with lesions were obviously shrank and the thigh circumference became near to the normal limb. Another case had no obvious change. One had mild recurring around the knee one year later. The major side-effects included medium to extreme swelling of the limbs (7/7), serum transaminase elevation (2/7), and numbness of the distal end of the limb (1/7). The complications included a small piece of skin necrosis (1/7) and the first toe-drop (1/7). Conclusion: The arteriography in KTS can demonstrate a part of vascular malformations. Transcatheter intra-arterial PLE injection was effective in treating the hypertrophy of the limb caused by KTS. Because the therapy could result in some serious side-effects and complications, it should be used carefully

Interventional spinal procedures guided and controlled by a 3D rotational angiographic unit.

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Pedicelli, Alessandro; Verdolotti, Tommaso; Pompucci, Angelo; Desiderio, Flora; D'Argento, Francesco; Colosimo, Cesare; Bonomo, Lorenzo

2011-12-01

The aim of this paper is to demonstrate the usefulness of 2D multiplanar reformatting images (MPR) obtained from rotational acquisitions with cone-beam computed tomography technology during percutaneous extra-vascular spinal procedures performed in the angiography suite. We used a 3D rotational angiographic unit with a flat panel detector. MPR images were obtained from a rotational acquisition of 8 s (240 images at 30 fps), tube rotation of 180° and after post-processing of 5 s by a local work-station. Multislice CT (MSCT) is the best guidance system for spinal approaches permitting direct tomographic visualization of each spinal structure. Many operators, however, are trained with fluoroscopy, it is less expensive, allows real-time guidance, and in many centers the angiography suite is more frequently available for percutaneous procedures. We present our 6-year experience in fluoroscopy-guided spinal procedures, which were performed under different conditions using MPR images. We illustrate cases of vertebroplasty, epidural injections, selective foraminal nerve root block, facet block, percutaneous treatment of disc herniation and spine biopsy, all performed with the help of MPR images for guidance and control in the event of difficult or anatomically complex access. The integrated use of "CT-like" MPR images allows the execution of spinal procedures under fluoroscopy guidance alone in all cases of dorso-lumbar access, with evident limitation of risks and complications, and without need for recourse to MSCT guidance, thus eliminating CT-room time (often bearing high diagnostic charges), and avoiding organizational problems for procedures that need, for example, combined use of a C-arm in the CT room.

Interventional spinal procedures guided and controlled by a 3D rotational angiographic unit

International Nuclear Information System (INIS)

Pedicelli, Alessandro; Verdolotti, Tommaso; Desiderio, Flora; D'Argento, Francesco; Colosimo, Cesare; Bonomo, Lorenzo; Pompucci, Angelo

2011-01-01

The aim of this paper is to demonstrate the usefulness of 2D multiplanar reformatting images (MPR) obtained from rotational acquisitions with cone-beam computed tomography technology during percutaneous extra-vascular spinal procedures performed in the angiography suite. We used a 3D rotational angiographic unit with a flat panel detector. MPR images were obtained from a rotational acquisition of 8 s (240 images at 30 fps), tube rotation of 180 and after post-processing of 5 s by a local work-station. Multislice CT (MSCT) is the best guidance system for spinal approaches permitting direct tomographic visualization of each spinal structure. Many operators, however, are trained with fluoroscopy, it is less expensive, allows real-time guidance, and in many centers the angiography suite is more frequently available for percutaneous procedures. We present our 6-year experience in fluoroscopy-guided spinal procedures, which were performed under different conditions using MPR images. We illustrate cases of vertebroplasty, epidural injections, selective foraminal nerve root block, facet block, percutaneous treatment of disc herniation and spine biopsy, all performed with the help of MPR images for guidance and control in the event of difficult or anatomically complex access. The integrated use of ''CT-like'' MPR images allows the execution of spinal procedures under fluoroscopy guidance alone in all cases of dorso-lumbar access, with evident limitation of risks and complications, and without need for recourse to MSCT guidance, thus eliminating CT-room time (often bearing high diagnostic charges), and avoiding organizational problems for procedures that need, for example, combined use of a C-arm in the CT room. (orig.)

Interventional spinal procedures guided and controlled by a 3D rotational angiographic unit

Energy Technology Data Exchange (ETDEWEB)

Pedicelli, Alessandro; Verdolotti, Tommaso; Desiderio, Flora; D' Argento, Francesco; Colosimo, Cesare; Bonomo, Lorenzo [Catholic University of Rome, A. Gemelli Hospital, Department of Bioimaging and Radiological Sciences, Rome (Italy); Pompucci, Angelo [Catholic University of Rome, A. Gemelli Hospital, Department of Neurotraumatology, Rome (Italy)

2011-12-15

The aim of this paper is to demonstrate the usefulness of 2D multiplanar reformatting images (MPR) obtained from rotational acquisitions with cone-beam computed tomography technology during percutaneous extra-vascular spinal procedures performed in the angiography suite. We used a 3D rotational angiographic unit with a flat panel detector. MPR images were obtained from a rotational acquisition of 8 s (240 images at 30 fps), tube rotation of 180 and after post-processing of 5 s by a local work-station. Multislice CT (MSCT) is the best guidance system for spinal approaches permitting direct tomographic visualization of each spinal structure. Many operators, however, are trained with fluoroscopy, it is less expensive, allows real-time guidance, and in many centers the angiography suite is more frequently available for percutaneous procedures. We present our 6-year experience in fluoroscopy-guided spinal procedures, which were performed under different conditions using MPR images. We illustrate cases of vertebroplasty, epidural injections, selective foraminal nerve root block, facet block, percutaneous treatment of disc herniation and spine biopsy, all performed with the help of MPR images for guidance and control in the event of difficult or anatomically complex access. The integrated use of ''CT-like'' MPR images allows the execution of spinal procedures under fluoroscopy guidance alone in all cases of dorso-lumbar access, with evident limitation of risks and complications, and without need for recourse to MSCT guidance, thus eliminating CT-room time (often bearing high diagnostic charges), and avoiding organizational problems for procedures that need, for example, combined use of a C-arm in the CT room. (orig.)

Positive exercise thallium-201 test responses in patients with less than 50% maximal coronary stenosis: angiographic and clinical predictors

International Nuclear Information System (INIS)

Brown, K.A.; Osbakken, M.; Boucher, C.A.; Strauss, H.W.; Pohost, G.M.; Okada, R.D.

1985-01-01

The incidence and causes of abnormal thallium-201 (TI-201) myocardial perfusion studies in the absence of significant coronary artery disease were examined. The study group consisted of 100 consecutive patients undergoing exercise TI-201 testing and coronary angiography who were found to have maximal coronary artery diameter narrowing of less than 50%. Maximal coronary stenosis ranged from 0 to 40%. The independent and relative influences of patient clinical, exercise and angiographic data were assessed by logistic regression analysis. Significant predictors of a positive stress TI-201 test result were: (1) percent maximal coronary stenosis (p less than 0.0005), (2) propranolol use (p less than 0.01), (3) interaction of propranolol use and percent maximal stenosis (p less than 0.005), and (4) stress-induced chest pain (p . 0.05). No other patient variable had a significant influence. Positive TI-201 test results were more common in patients with 21 to 40% maximal stenosis (59%) than in patients with 0 to 20% maximal stenosis (27%) (p less than 0.01). Among patients with 21 to 40% stenosis, a positive test response was more common when 85% of maximal predicted heart rate was achieved (75%) than when it was not (40%) (p less than 0.05). Of 16 nonapical perfusion defects seen in patients with 21 to 40% maximal stenosis, 14 were in the territory that corresponded with such a coronary stenosis. Patients taking propranolol were more likely to have a positive TI-201 test result (45%) than patients not taking propranolol (22%) (p less than 0.05)

University Students with Poor Reading Comprehension

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Georgiou, George K.; Das, J. P.

2015-01-01

The present study aimed to examine the nature of the working memory and general cognitive ability deficits experienced by university students with a specific reading comprehension deficit. A total of 32 university students with poor reading comprehension but average word-reading skills and 60 age-word-matched controls with no comprehension…

Enhancing Social Studies Vocabulary and Comprehension for 7th Grade English Language Learners: Findings from Two Experimental Studies

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Vaughn, Sharon; Martinez, Leticia R.; Reutebuch, Colleen K.; Carlson, Coleen D.; Thompson, Sylvia L.; Franci, David J.

2010-01-01

The authors identified instructional practices associated with improved outcomes for English language learners (ELLs): (1) research-based vocabulary and concept instruction, (2) the use of media to build comprehension and concept knowledge, (3) the use of graphic organizers, and (4) structured peer-pairings. The purpose of our two studies was to…

Listening comprehension in preschoolers: the role of memory.

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Florit, Elena; Roch, Maja; Altoè, Gianmarco; Levorato, Maria Chiara

2009-11-01

The current study analyzed the relationship between text comprehension and memory skills in preschoolers. We were interested in verifying the hypothesis that memory is a specific contributor to listening comprehension in preschool children after controlling for verbal abilities. We were also interested in analyzing the developmental path of the relationship between memory skills and listening comprehension in the age range considered. Forty-four, 4-year-olds (mean age = 4 years and 6 months, SD = 4 months) and 40, 5-year-olds (mean age = 5 years and 4 months, SD = 5 months) participated in the study. The children were administered measures to evaluate listening comprehension ability (story comprehension), short-term and working memory skills (forward and backward word span), verbal intelligence and receptive vocabulary. Results showed that both short-term and working memory predicted unique and independent variance in listening comprehension after controlling for verbal abilities, with working memory explaining additional variance over and above short-term memory. The predictive power of memory skills was stable in the age range considered. Results also confirm a strong relation between verbal abilities and listening comprehension in 4- and 5-year-old children.

Metaphor Comprehension in Autistic Spectrum Disorders: Case Studies of Two High-Functioning Children

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Melogno, Sergio; D'Ardia, Caterina; Pinto, Maria Antonietta; Levi, Gabriel

2012-01-01

This article presents case studies on metaphor comprehension in two boys with high-functioning autistic spectrum disorder, aged 9;1 (9 years, 1 month) and 8;11. The participants were assessed twice, before and after an intervention program aimed at improving their social skills. The focus of the article is on the specific patterns exhibited by…

The Effects of CLIL on Oral Comprehension and Production: A Longitudinal Case Study

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Pérez Cañado, María Luisa; Lancaster, Nina Karen

2017-01-01

This article reports on the outcomes of a longitudinal case study to gauge the impact of content and language integrated learning (CLIL) on two of the least researched language skills: oral comprehension and production. It worked with 24 students in the fourth grade of Compulsory Secondary Education in a public school in Andalusia (southern Spain)…

Preparing for reading comprehension: Fostering text comprehension skills in preschool and early elementary school children

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Paul van den BROEK

2011-11-01

Full Text Available To understand what they read or hear, children and adults must create a coherent mental representation of presented information. Recent research suggests that the ability to do so starts to develop early –well before reading age- and that early individual differences are predictive of later reading-comprehension performance. In this paper, we review this research and discuss potential applications to early intervention. We then present two exploratory studies in which we examine whether it is feasible to design interventions with early readers (3rd grade and even toddlers (2-3 years old. The interventions employed causal questioning techniques as children listen to orally presented,age-appropriate narratives. Afterwards, comprehension was tested through question answering and recall tasks. Results indicate that such interventions are indeed feasible. Moreover, they suggest thatfor both toddlers and early readers questions during comprehension are more effective than questions after comprehension. Finally, for both groups higher working memory capacity was related to bettercomprehension.

Pooled analysis of the CONFIRM registries: impact of gender on procedure and angiographic outcomes in patients undergoing orbital atherectomy for peripheral artery disease.

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Lee, Michael S; Canan, Timothy; Rha, Seung-Woon; Mustapha, Jihad; Adams, George L

2015-02-01

To compare the acute procedure and angiographic outcomes of peripheral artery disease (PAD) patients treated with orbital atherectomy stratified by gender. The CONFIRM I, II, and III registries are US multicenter, nonrandomized, all-comers registries of PAD patients who were treated with orbital atherectomy. All patients with gender specified in the registry database were included in the current analysis, which compared the final residual stenosis achieved after atherectomy and the rate of acute complications in female and male patients. The 3 registries included 3131 patients with 4761 lesions: 1261 women (mean age 73.2 ± 10.7 years) with 1874 lesions and 1870 men (mean age 70.4 ± 10.2) with 2887 lesions. The women were older (p atherectomy in both men and women; however, women had a higher rate of dissection (all types). This difference is likely because of the older age and higher percentage of critical limb ischemia in women in this cohort. These results, however, suggest that additional studies should be completed to further understand the increased risks for women vs. men during endovascular procedures. © The Author(s) 2015.

Foundations of reading comprehension in children with intellectual disabilities

NARCIS (Netherlands)

Wingerden-Fontein, E.G. van; Segers, P.C.J.; Balkom, L.J.M. van; Verhoeven, L.T.W.

2017-01-01

Background Knowledge about predictors for reading comprehension in children with intellectual disabilities (ID) is still fragmented. Aims This study compared reading comprehension, word decoding, listening comprehension, and reading related linguistic and cognitive precursor measures in children

The Effect of Cilostazol on the Angiographic Outcome of Drug-Eluting Coronary Stents Angiographic Analysis of the CILON-T (Influence of CILostazol-Based Triple Antiplatelet Therapy ON Ischemi Complication after Drug-Eluting StenT Implantation) Trial.

Science.gov (United States)

Suh, Jung-Won; Lee, Seung-Pyo; Park, KyungWoo; Kang, Hyun-Jae; Koo, Bon-Kwon; Cho, Young-Seok; Youn, Tae-Jin; Chae, In-Ho; Choi, Dong-Ju; Rha, Seung-Woon; Bae, Jang-Ho; Kwon, Taek-Geun; Bae, Jang-Whan; Cho, Myeong-Chan; Kim, Hyo-Soo

2017-12-12

It is not clear if anti-restonotic effect of cilostazol is consistent for different types of drug-eluting stents (DES).The purpose of this study was to compare the anti-proliferative effect of cilostazol between DAT and TAT with consideration of confounding influences of DES type.Nine hundred and fifteen patients were randomized to either dual antiplatelet therapy (DAT; aspirin and clopidogrel) or triple antiplatelet therapy (TAT; aspirin, clopidogrel, and cilostazol) in the previous CILON-T trial. After excluding 70 patients who received both or neither stents, we analyzed 845 patients who received exclusively PES or ZES, and compared in-stent late loss at 6 months between both antiplatelet regimens (DAT versus TAT).Baseline angiographic and clinical characteristics were similar between the DAT (656 lesions in 425 patients) and the TAT group (600 lesions in 420 patients). The 6-month follow-up angiography was completed in 745 patients (88.2%). Quantitative coronary angiography showed that TAT significantly reduced in-stent late loss (DAT 0.62 ± 0.62 mm versus TAT 0.54 ± 0.49 mm, P = 0.015). Stent type, diabetes or lesion length did not interact with difference of late loss. However, reduction of late loss by cilostazol did not lead to a significant reduction in the rate of target lesion revascularization (TLR) (DAT 7.8% versus TAT 6.9%, P = 0.69) due to a nonlinear relationship found between late loss and TLR.The TAT group showed less in-stent late loss as compared to the DAT group. This was consistently observed regardless of DES type, lesion length, or diabetic status. However, reduction of late loss by cilostazol did not lead to a significant reduction in TLR.

Comprehensive study of flow and heat transfer at the surface of circular cooling fin

Science.gov (United States)

Mityakov, V. Yu; Grekov, M. A.; Gusakov, A. A.; Sapozhnikov, S. Z.; Seroshtanov, V. V.; Bashkatov, A. V.; Dymkin, A. N.; Pavlov, A. V.; Milto, O. A.; Kalmykov, K. S.

2017-11-01

For the first time is proposed to combine heat flux measurements with thermal imaging and PIV (particle image velocimetry) for a comprehensive study of flow and heat transfer at the surface of the circular cooling fin. The investigated hollow fin is heated from within with saturated water steam; meanwhile the isothermal external surface simulates one of the perfect fin. Flow and heat transfer at the surface of the solid fin of the same size and shape, made of titanium alloy is investigated in the same regimes. Gradient Heat Flux Sensors (GHFS) were installed at different places of the fin surface. Velocity field around a cylinder, temperature field at the surface of the fin and heat flux for each rated time were obtained. Comprehensive method including heat flux measurement, PIV and thermal imaging allow to study flow and heat transfer at the surface of the fin in real time regime. The possibility to study flow and heat transfer for non-isothermal fins is shown; it is allow to improve traditional calculation of the cooling fins.

Neuroimaging Evidence of Comprehension Monitoring

Directory of Open Access Journals (Sweden)

Linda Baker

2014-04-01

Full Text Available The purpose of this article is to synthesize the emerging neuroimaging literature that reveals how the brain responds when readers and listeners encounter texts that demand monitoring of their ongoing comprehension processes. Much of this research has been undertaken by cognitive scientists who do not frame their work in metacognitive terms, and therefore it is less likely to be familiar to psychologists who study metacognition in educational contexts. The important role of metacognition in the development and use of academic skills is widely recognized. Metacognition is typically defined as the awareness and control of one's own cognitive processes. In the domain of reading, the most important metacognitive skill is comprehension monitoring, the evaluation and regulation of comprehension. Readers who monitor their understanding realize when they have encountered difficulty making sense of the text, and they apply error correction procedures to attempt to resolve the difficulty. Metacognition depends on executive control skills that continue to develop into early adulthood, in parallel with the maturation of the executive control regions of the prefrontal cortex. Functional magnetic resonance imaging (fMRI and event-related potentials (ERP have been used for some time to study neural correlates of basic reading processes such as word identification, but it is only within recent years that researchers have turned to the higher-level processes of text comprehension. The article describes illustrative studies that reveal changes in neural activity when adults apply lexical, syntactic, or semantic standards to evaluate their understanding.

A comparison of the clinical, haemodynamic and angiographic features in right ventricular endomyocardial fibrosis and Ebstein's anomaly of the tricuspid valve.

Science.gov (United States)

Balakrishnan, K G; Sapru, R P; Sasidharan, K; Venkitachalam, C G

1982-01-01

The clinical, haemodynamic and angiographic features of 18 patients with right ventricular endomyocardial fibrosis (RVEMF) and 8 patients with Ebstein's anomaly of the tricuspid valve (EATV) have been compared. Diagnosis was confirmed by selective angiography. The position of the tricuspid annulus was identified from selective right ventricular angiograms and confirmed by selective right coronary angiography. In 83% of RVEMF patients the tricuspid annulus was displaced to the left of the spine. A false impression of displacement of the tricuspid leaflet can thus be created. However, a tricuspid leaflet displaced away from the tricuspid annulus was found only in patients with EATV. A considerable overlap exists between the wide spectrum of clinical presentations of the two conditions. Helpful distinguishing features that favour EATV were, the presence of a scratchy diastolic murmur and polyphasic QRS complexes in the ECG. Atrial fibrillation in the ECG, and myocardial calcification or pericardial effusion, whenever present, favour RVEMF.

Optimization of three-dimensional angiographic data obtained by self-calibration of multiview imaging

International Nuclear Information System (INIS)

Noeel, Peter B.; Hoffmann, Kenneth R.; Kasodekar, Snehal; Walczak, Alan M.; Schafer, Sebastian

2006-01-01

Stroke is one of the leading causes of death in the U.S. The treatment of stroke often involves vascular interventions in which devices are guided to the intervention site often through tortuous vessels based on two-dimensional (2-D) angiographic images. Three dimensional (3-D) vascular information may facilitate these procedures. Methods have been proposed for the self-calibrating determination of 3-D vessel trees from biplane and multiple plane images and the geometric relationships between the views (imaging geometries). For the biplane analysis, four or more corresponding points must be identified in the biplane images. For the multiple view technique, multiple vessels must be indicated and only the translation vectors relating the geometries are calculated. We have developed methods for the calculation of the 3-D vessel data and the full transformations relating the multiple views (rotations and translations) obtained during interventional procedures, and the technique does not require indication of corresponding points, but only the indication of a single vessel, e.g., the vessel of interest. Multiple projection views of vessel trees are obtained and transferred to the analysis computer. The vessel or vessels of interest are indicated by the user. Using the initial imaging geometry determined from the gantry information, 3-D vessel centerlines are calculated using the indicated centerlines in pairs of images. The imaging geometries are then iteratively adjusted and 3-D centerlines recalculated until the root-mean-square (rms) difference between the calculated 3-D centerlines is minimized. Simulations indicate that the 3-D centerlines can be accurately determined (to within 1 mm) even for errors in indication of the vessel endpoints as large as 5 mm. In phantom studies, the average rms difference between the pairwise calculated 3-D centerlines is approximately 7.5 mm prior to refinement (i.e., using the gantry information alone), whereas the average rms

The Comprehension Problems for Second-Language Learners with Poor Reading Comprehension Despite Adequate Decoding: A Meta-Analysis

Science.gov (United States)

Spencer, Mercedes; Wagner, Richard K.

2017-01-01

We conducted a meta-analysis of 16 existing studies to examine the nature of the comprehension problems for children who were second-language learners with poor reading comprehension despite adequate decoding. Results indicated that these children had deficits in oral language (d = -0.80), but these deficits were not as severe as their reading…

Reading and listening comprehension and their relation to inattention and hyperactivity.

Science.gov (United States)

Cain, Kate; Bignell, Simon

2014-03-01

Children with diagnoses of attention-deficit/hyperactivity disorder (ADHD) frequently have reading problems. To date, it is not clear whether poor reading is associated with both inattention and hyperactivity and also whether poor reading comprehension is the result of poor word reading skills or more general language comprehension weaknesses. We report two studies to examine how reading and listening comprehension skills are related to inattention and hyperactivity/impulsivity. Separate groups of 7- to 11-year-olds participated in each study. In both studies, we used teacher ratings of inattention and hyperactivity/impulsivity to identify three groups at risk of ADHD: poor attention, high hyperactivity, poor attention and high hyperactivity, and also same-age controls. In Study 1, we explored how inattention and hyperactivity predicted reading after controlling for non-verbal IQ and vocabulary. In Study 2, we compared listening and reading comprehension in these groups. Poor attention was related to poor reading comprehension, although the relation was partially mediated by word reading skill (Study 1). Groups with high hyperactivity had weak listening comprehension relative to reading comprehension (Study 2). These results indicate that the reading comprehension problems of children with attention difficulties are related to poor word reading and that listening comprehension is particularly vulnerable in children at risk of ADHD. © 2013 The British Psychological Society.

Vascular changes in sporadic ergotism. Epidemiology, pathogenesis, clinical practice, and diagnosis with special regard to angiographic documentation

Energy Technology Data Exchange (ETDEWEB)

Hagen, B.

1986-08-01

Whereas the epidemic form of ergotism has been rare in the 20th century, the sporadic form has a wide distribution as a consequence of therapy with ergot-derivative drugs. Favourable prognosis of the condition, with complete recovery from the ischemic peripheral circulatory disorders can be obtained by early diagnosis. Precise evaluation of the history, with recognition of treatment of migraine headache or postpartum hemorraghe with ergot alkaloids, can be determinative in diagnosis. The specific pattern of the angiographic findings, as we saw it in 6 cases within the last 4 years, decisively confirms the diagnosis. We could demonstrate thread-, thorn- and hour glass-like narrowing of the vessels, due to spasm. Total occlusion with the development of collaterals may occur, but we saw no thrombus formation. The stenotic arterial segments had smooth margins. The distribution of the involved arteries was more focal than generalized and more peripheral than central. In two cases spasm could be abolished immediately by a pharmaceutical (i.a. injection of tolazoline) or by anesthetic procedures (halothane). The phenomenologic data, together with the complete reversal of the circulatory ischemic disorders after therapy (particularly the absolute ban of ergots), is so specific that other diseases of ischemic nature (emboli, arteriosclerosis, Buerger's disease, fibromuscular hyperplasia) can be excluded.

Reading comprehension difficulties in children with rolandic epilepsy.

Science.gov (United States)

Currie, Nicola K; Lew, Adina R; Palmer, Tom M; Basu, Helen; De Goede, Christian; Iyer, Anand; Cain, Kate

2018-03-01

Difficulties in reading comprehension can arise from either word reading or listening comprehension difficulties, or a combination of the two. We sought to determine whether children with rolandic epilepsy had poor reading comprehension relative to typically developing comparison children, and whether such difficulties were associated with word reading and/or general language comprehension difficulties. In this cross-sectional study, children with rolandic epilepsy (n=25; 16 males, 9 females; mean age 9y 1mo, SD 1y 7mo) and a comparison group (n=39; 25 males, 14 females; mean age 9y 1mo, SD 1y 3mo) completed assessments of reading comprehension, listening comprehension, word/non-word reading, speech articulation, and Non-verbal IQ. Reading comprehension and word reading were worse in children with rolandic epilepsy (F 1,61 =6.89, p=0.011, ηp2=0.10 and F 1,61 =6.84, p=0.011, ηp2=0.10 respectively), with listening comprehension being marginal (F 1,61 =3.81, p=0.055, ηp2=0.06). Word reading and listening comprehension made large and independent contributions to reading comprehension, explaining 70% of the variance. Children with rolandic epilepsy may be at risk of reading comprehension difficulties. Thorough assessment of individual children is required to ascertain whether the difficulties lie with decoding text, or with general comprehension skills, or both. Children with rolandic epilepsy may be at risk of poor reading comprehension. This was related to poor word reading, poor listening comprehension, or both. Reading comprehension interventions should be tailored to the profile of difficulties. © 2017 Mac Keith Press.

Listening Comprehension Strategies: A Review of the Literature

Science.gov (United States)

Berne, Jane E.

2004-01-01

Numerous studies related to listening comprehension strategies have been published in the past two decades. The present study seeks to build upon two previous reviews of listening comprehension strategies research. Of particular interest in this review are studies dealing with the types of cues used by listeners, the sequence of listening,…

Malignant hemangiopericytoma. A correlative study of angiography, computed tomography, and pathology

Energy Technology Data Exchange (ETDEWEB)

Higa, Toshiaki; Kuroda, Yasumasa; Kobashi, Yoichiro; Ichijima, Kunio; Odori, Teruo; Torizuka, Kanji [Kyoto Univ. (Japan). Hospital

1983-01-01

Four cases of primary and secondary malignant hemangiopericytoma were correlatively studied using selective angiography, computed tomography, and pathologic specimens. One case was found in each of the peritoneal space (metastasis), the left middle cranial fossa, the left thigh, and the left retroperitoneal space. Basic angiographic features of the tumor were a few feeding arteries entering the tumor with radially arranged fine network throughout, early visualization of veins due to A-V shunting, and a long-standing tumor stain with avascular area (s). Correlative evaluation of angiograms, computed tomograms, and pathologic specimens revealed hemorrhage, central necrosis, and cystic degeneration for the avascular area (s) of the tumor stains on the angiograms. The more prominent those secondary changes, the less characteristic the angiographic features.

Benefit of cone-beam computed tomography angiography in acute management of angiographically undetectable ruptured arteriovenous malformations.

Science.gov (United States)

Rahal, Jason P; Malek, Adel M

2013-10-01

Ruptured arteriovenous malformations (AVMs) are a frequent cause of intracerebral hemorrhage (ICH). In some cases, compression from the associated hematoma in the acute setting can partially or completely occlude an AVM, making it invisible on conventional angiography techniques. The authors report on the successful use of cone-beam CT angiography (CBCT-A) to precisely identify the underlying angioarchitecture of ruptured AVMs that are not visible on conventional angiography. Three patients presented with ICH for which they underwent examination with CBCT-A in addition to digital subtraction angiography and other imaging modalities, including MR angiography and CT angiography. All patients underwent surgical evacuation due to mass effect from the hematoma. Clinical history, imaging studies, and surgical records were reviewed. Hematoma volumes were calculated. In all 3 cases, CBCT-A demonstrated detailed anatomy of an AVM where no lesion or just a suggestion of a draining vein had been seen with other imaging modalities. Magnetic resonance imaging demonstrated enhancement in 1 patient; CT angiography demonstrated a draining vein in 1 patient; 2D digital subtraction angiography and 3D rotational angiography demonstrated a suggestion of a draining vein in 2 cases and no finding in the third. In the 2 patients in whom CBCT-A was performed prior to surgery, the demonstrated AVM was successfully resected without evidence of a residual lesion. In the third patient, CBCT-A allowed precise targeting of the AVM nidus using Gamma Knife radiosurgery. Cone-beam CT angiography should be considered in the evaluation and subsequent treatment of ICH due to ruptured AVMs. In cases in which the associated hematoma compresses the AVM nidus, CBCT-A can have higher sensitivity and anatomical accuracy than traditional angiographic modalities, including digital subtraction angiography.

Students’ Reading Comprehension Performance with Emotional Literacy-Based Strategy Intervention

Directory of Open Access Journals (Sweden)

Yusfarina Mohd Yussof

2013-07-01

Full Text Available An effective reading comprehension process demands a strategy to enhance the cognitive ability to digest text information in the effort to elicit meaning contextually. In addition, the role of emotions also influences the efficacy of this process, especially in narrative text comprehension. This quasi-experimental study aims to observe students’ performance in the Reading Comprehension Test resulting from Emotional Literacy-Based Reading Comprehension Strategy (ELBRCS, which is a combination of cognitive and affective strategies. This study involved 90 students, whereby 45 students were clustered in the Experimental Group and received the ELBRCS intervension. The remaining 45 students were placed in the Control Group and underwent the conventional strategy (prevalent classroom method.The students’ reading comprehension performance was measured using the Reading Comprehension Test (RCT. The findings show that the experimental group received a higher score than the control group for RCT. The intervention has successfully increased student’s Reading Comprehension from literal comprehension to higher levels of comprehension i.e. inferential, evaluative and appreciative levels, as indicated by Barret’s Taxonomy.

A Cross-Sectional Study of Fluency and Reading Comprehension in Spanish Primary School Children

Science.gov (United States)

Calet, Nuria; Gutiérrez-Palma, Nicolás; Defior, Sylvia

2015-01-01

The importance of prosodic elements is recognised in most definitions of fluency. Although speed and accuracy have been typically considered the constituents of reading fluency, prosody is emerging as an additional component. The relevance of prosody in comprehension is increasingly recognised in the latest studies. The purpose of this research is…

Preoperative evaluation of hepatic arterial and portal venous anatomy using the time resolved echo-shared MR angiographic technique in living liver donors

International Nuclear Information System (INIS)

Lee, Min Woo; Lee, Jeong Min; Lee, Jae Young; Kim, Se Hyung; Park, Eun-Ah; Han, Joon Koo; Choi, Jin-Young; Choi, Byung Ihn; Kim, Young Jun; Suh, Kyung-Suk

2007-01-01

The purpose of this study was to determine whether MR angiography utilizing the time resolved echo-shared angiographic technique (TREAT) can provide an effective assessment of the hepatic artery (HA) and portal vein (PV) in living donor candidates. MR angiography (MRA)was performed in 27 patients (23 men and 4 women; mean age, 31 years) by using TREAT. Two blinded radiologists evaluated HA anatomy, origin of segment IV feeding artery and PV anatomy in consensus. Qualitative evaluations of MRA images were performed using the following criteria: (a) overall image quality, (b) presence of artifacts, and (c) degree of venous contamination of the arterial phase. Using intraoperative findings as a standard of reference, the accuracy for the HA anatomy, origin of segment IV feeding artery and PV anatomy on TREAT-MRA were 93% (25/27), 85% (23/27), and 96% (26/27), respectively. Overall image qualities were as follows: excellent (n=22, 81%), good (n=4, 15%), and fair (n=1, 4%). Significant artifacts or venous contamination of the arterial phase images was not noted in any patient. TREAT-MRA can provide a complete evaluation of HA and PV anatomy during preoperative evaluation of living liver donors. Furthermore, it provides a more detailed anatomy of the HA without venous contamination. (orig.)

Predicting Second Grade Listening Comprehension Using Prekindergarten Measures

Science.gov (United States)

Alonzo, Crystle N.; Yeomans-Maldonado, Gloria; Murphy, Kimberly A.; Bevens, Beau

2016-01-01

Purpose: The purpose of this study was to determine prekindergarten predictors of listening comprehension in second grade. Methods: Within a large, 5-year longitudinal study, children progressing from prekindergarten to second grade were administered a comprehensive set of prekindergarten measures of foundational language skills (vocabulary and…

A Correlational Study of a Reading Comprehension Program and Attrition Rates of ESL Nursing Students in Texas.

Science.gov (United States)

Donnell, Wendy M

The purpose of this study was to examine the associations between English as a second language (ESL), a reading comprehension program, and attrition rates of nursing students. Higher attrition rates of ESL nursing students are an assumption, seemingly based on anecdotal evidence. Data reflecting ESL student attrition should be measured and analyzed so that students can be identified prior to attrition. A secondary analysis of a large database of 27 initial licensure programs in Texas was completed. Data analysis identified that ESL students who used a reading comprehension program were almost twice as likely to be off track or out of the program as ESL students who did not use the program. Nurse educators need to evaluate student profile characteristics in a comprehensive way when determining risk of attrition.

IQ and Reading Comprehension in Translation Quality

Directory of Open Access Journals (Sweden)

Mohsen Askari

2017-10-01

Full Text Available Having a deeper understanding of determining factors in the quality of translation is in the interest of almost all scholars of translation studies. Students’ intelligence is being measured constantly in order to determine their aptitude for entering into different programs. However, in translation studies, the variable of intelligence quotient (IQ has been curiously ignored among researchers. This study aimed to explore the strength of both IQ and reading comprehension in predicting translation quality among Iranian translation students.  A sample of forty-six translation students from Alborz University of Qazvin participated in this study. Data were collected using three tests including Raven’s Advanced Progressive Matrices, Colina’s (2008 componential translation quality rating scheme and the reading comprehension test of IELTS. The results show IQ test scores and reading comprehension significantly predict translation quality assessment. Surprisingly, the most significant finding is that IQ score is by far a better predictor of translation quality than reading comprehension. Overall, it is concluded that translation quality assessment is more of a deeper cognitive function than solely language process, which could lead to more research on cognitive aspects of translation.

The Impact of Gloss Types on Reading Comprehension, Vocabulary Gain and Vocabulary Retention: A Comparative Study

Directory of Open Access Journals (Sweden)

Atefeh Elekaei

2015-09-01

Full Text Available The significance and impact of vocabulary learning in reading comprehension and L2 language learning are apparent to teachers, researchers and language learners. Moreover, glosses are found as one of the most effective strategies regarding vocabulary retention. Therefore, the present study attempted to investigate the effect of different types of glosses on reading comprehension, vocabulary gain and vocabulary retention. To this end, 140 Iranian EFL learners learning English were selected and were divided into four groups (footnote gloss group, interlinear gloss group, marginal gloss group, and glossary group. They were required to read a text and answer four reading comprehension questions. In addition, one immediate vocabulary post-test and one delayed vocabulary post-test were taken in order to investigate learners' vocabulary gain and vocabulary retention. In order to analyze the data, one one-way ANOVA and one MANOVA were run. The results of one-way ANOVA revealed that participants who received interlinear glosses significantly outperformed the other groups regarding comprehending the text. Moreover, the immediate vocabulary post-test was conducted immediately after reading test and the delayed post-test was administered after four weeks. The results of MANOVA indicated that the group which received interlinear glosses outperformed the other groups in both vocabulary gain and vocabulary retention. The present study has implications for teachers and learners. Teachers can find better methods to teach new reading passages as well as vocabulary items. Also, glosses help learners to have a better comprehension of difficult passages and they facilitate learning. Moreover, learners can enhance their vocabulary knowledge with the help of glosses.

Supporting nanomaterial risk assessment by case studies of nano-titanium dioxide using comprehensive environmental assessment

Science.gov (United States)

Here we describe a comprehensive environmental assessment (CEA) approach for two case studies of nano-titanium dioxide (nano-TiO2) in real world applications: water treatment and sunscreen. CEA combines a product life cycle framework with the risk assessment paradigm.

Phonological and semantic processing during comprehension in Wernicke's aphasia: An N400 and Phonological Mapping Negativity Study.

Science.gov (United States)

Robson, Holly; Pilkington, Emma; Evans, Louise; DeLuca, Vincent; Keidel, James L

2017-06-01

Comprehension impairments in Wernicke's aphasia are thought to result from a combination of impaired phonological and semantic processes. However, the relationship between these cognitive processes and language comprehension has only been inferred through offline neuropsychological tasks. This study used ERPs to investigate phonological and semantic processing during online single word comprehension. EEG was recorded in a group of Wernicke's aphasia n=8 and control participants n=10 while performing a word-picture verification task. The N400 and Phonological Mapping Negativity/Phonological Mismatch Negativity (PMN) event-related potential components were investigated as an index of semantic and phonological processing, respectively. Individuals with Wernicke's aphasia displayed reduced and inconsistent N400 and PMN effects in comparison to control participants. Reduced N400 effects in the WA group were simulated in the control group by artificially degrading speech perception. Correlation analyses in the Wernicke's aphasia group found that PMN but not N400 amplitude was associated with behavioural word-picture verification performance. The results confirm impairments at both phonological and semantic stages of comprehension in Wernicke's aphasia. However, reduced N400 responses in Wernicke's aphasia are at least partially attributable to earlier phonological processing impairments. The results provide further support for the traditional model of Wernicke's aphasia which claims a causative link between phonological processing and language comprehension impairments. Copyright © 2017 Elsevier Ltd. All rights reserved.

Study of secondhand smoke exposure in St. Louis City and County suggests need for comprehensive smoke-free Missouri law adoption.

Science.gov (United States)

Moreland-Russell, Sarah; Cyr, Julianne; Benson, Peter; Colditz, Graham; Pulley, Deren; Barnoya, Joaquin

2012-01-01

This cross-sectional study provides information about secondhand smoke exposure across the St. Louis metro area and perceptions and attitudes about tobacco and health within the local hospitality industry. Results from this study support the need for passage and implementation of comprehensive smoke-free laws throughout Missouri, particularly in St. Louis City and County where efforts to pass comprehensive smoke-free laws have been unsuccessful.

A Case Study of the Impact of Guided Reading Groups in Second Grade on Comprehension Improvement

Science.gov (United States)

Lorent Deegan, Chanin E.

2010-01-01

This study combined both qualitative and quantitative research to determine the impact of instructional practices on comprehension improvement in second grade Guided Reading groups. Four second grade teachers and their 73 students ages seven through eight years old participated in this study. Additionally, the study examined the effects of Guided…

Comprehensive cardiac rehabilitation

DEFF Research Database (Denmark)

Kruse, Marie; Hochstrasser, Stefan; Zwisler, Ann-Dorthe O

2006-01-01

OBJECTIVES: The costs of comprehensive cardiac rehabilitation are established and compared to the corresponding costs of usual care. The effect on health-related quality of life is analyzed. METHODS: An unprecedented and very detailed cost assessment was carried out, as no guidelines existed...... and may be as high as euro 1.877. CONCLUSIONS: Comprehensive cardiac rehabilitation is more costly than usual care, and the higher costs are not outweighed by a quality of life gain. Comprehensive cardiac rehabilitation is, therefore, not cost-effective....

Reading Comprehension Instruction Practices in Sierra Leone

NARCIS (Netherlands)

Hersbach, S.; Denessen, E.J.P.G.; Droop, W.

2014-01-01

Aim: In this study an attempt was made to give insight in the way reading comprehension is taught in Sierra Leone. Attention was paid to the didactical strategies and the materials used during reading comprehension instruction. Methodology: Primary school teachers in Sierra Leone (N=43) were

A Study on improvement of comprehensive environmental management system - activation of liberalized environmental management

Energy Technology Data Exchange (ETDEWEB)

Chung, Hweu Sung; Kang, Chul Goo [Korea Environment Institute, Seoul (Korea)

1998-12-01

As a part of improvement on a comprehensive environmental management system, this study was attempted to find an activating policy for a liberalized environmental management. This study provided an activation plan of reasonable environmental regulation reform and liberalized environmental management through the analysis of foreign examples and domestic situation. Furthermore, it analyzed an institutional mechanism for a smooth operation of liberalized environmental management. 68 refs., 5 figs., 51 tabs.

Evaluation of interpolation methods for surface-based motion compensated tomographic reconstruction for cardiac angiographic C-arm data

International Nuclear Information System (INIS)

Müller, Kerstin; Schwemmer, Chris; Hornegger, Joachim; Zheng Yefeng; Wang Yang; Lauritsch, Günter; Rohkohl, Christopher; Maier, Andreas K.; Schultz, Carl; Fahrig, Rebecca

2013-01-01

Purpose: For interventional cardiac procedures, anatomical and functional information about the cardiac chambers is of major interest. With the technology of angiographic C-arm systems it is possible to reconstruct intraprocedural three-dimensional (3D) images from 2D rotational angiographic projection data (C-arm CT). However, 3D reconstruction of a dynamic object is a fundamental problem in C-arm CT reconstruction. The 2D projections are acquired over a scan time of several seconds, thus the projection data show different states of the heart. A standard FDK reconstruction algorithm would use all acquired data for a filtered backprojection and result in a motion-blurred image. In this approach, a motion compensated reconstruction algorithm requiring knowledge of the 3D heart motion is used. The motion is estimated from a previously presented 3D dynamic surface model. This dynamic surface model results in a sparse motion vector field (MVF) defined at control points. In order to perform a motion compensated reconstruction, a dense motion vector field is required. The dense MVF is generated by interpolation of the sparse MVF. Therefore, the influence of different motion interpolation methods on the reconstructed image quality is evaluated. Methods: Four different interpolation methods, thin-plate splines (TPS), Shepard's method, a smoothed weighting function, and a simple averaging, were evaluated. The reconstruction quality was measured on phantom data, a porcine model as well as on in vivo clinical data sets. As a quality index, the 2D overlap of the forward projected motion compensated reconstructed ventricle and the segmented 2D ventricle blood pool was quantitatively measured with the Dice similarity coefficient and the mean deviation between extracted ventricle contours. For the phantom data set, the normalized root mean square error (nRMSE) and the universal quality index (UQI) were also evaluated in 3D image space. Results: The quantitative evaluation of all

Angiographic frequency of blunt cerebrovascular injury in patients with carotid canal or vertebral foramen fractures on multidetector CT

International Nuclear Information System (INIS)

McKinney, Alexander; Ott, Frederick; Short, James; McKinney, Zeke; Truwit, Charles

2007-01-01

Purpose: Blunt carotid injuries (BCI's) and blunt vertebral artery injuries (BVI's), known jointly as BCVI's, are common in 'high risk' patients. The purpose is to evaluate the rate of occurrence of BCI/BVI in patients screened purely by the radiologic criteria of fracture through the carotid canal or vertebral transverse foramina, or significant cervical subluxation, noted by multidetector CT. Methods: Seventy-one patients with 108 catheterized vessels were included over a 13-month interval. The angiographic examinations were prompted by current hospital protocol, solely by the presence of fractures involving/adjacent to the carotid canal, cervical fractures involving/adjacent to the foramen transversarium, or cervical fractures with significant subluxation. The incidence of each grade of blunt injury was calculated after review of the CT scans and catheter angiograms by two neuroradiologists. Results: Two thousand and seventy-three total blunt trauma admissions occurred during the time period, with a BCVI rate of 0.92-1.0% (depending on the reviewer), similar to previous studies. Mean time to catheter angiography was 16.6 h. Of the 71 included patients, there were 11-12 BCI's and 10-12 BVI's, an overall rate of 27-30% of BCVI in the patients with foraminal fractures. Interobserver agreement in reviewing the catheter angiograms was excellent (Kappa 0.795). Of note, three internal carotid pseudoaneurysms resolved spontaneously after anticoagulation or aspirin. Conclusion: This study confirms that there is a high rate of BCVI in the presence of carotid canal or vertebral foramen fractures that are noted by multidetector CT. Utilization of purely radiologic criteria of foraminal involvement may be a significant screening tool in the decision of whether to evaluate these patients acutely by catheter or CT angiography, and for early detection of patients at risk for symptomatology, to initiate prompt, prophylactic treatment

Angiographic frequency of blunt cerebrovascular injury in patients with carotid canal or vertebral foramen fractures on multidetector CT

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McKinney, Alexander [Department of Radiology, Hennepin County and University of Minnesota-Fairview and Medical Centers, Minneapolis, MN (United States)]. E-mail: mckin022@umn.edu; Ott, Frederick [Department of Radiology, Hennepin County and University of Minnesota-Fairview and Medical Centers, Minneapolis, MN (United States); Short, James [Department of Radiology, Hennepin County and University of Minnesota-Fairview and Medical Centers, Minneapolis, MN (United States); McKinney, Zeke [Department of Radiology, Hennepin County and University of Minnesota-Fairview and Medical Centers, Minneapolis, MN (United States); Truwit, Charles [Department of Radiology, Hennepin County and University of Minnesota-Fairview and Medical Centers, Minneapolis, MN (United States)

2007-06-15

Purpose: Blunt carotid injuries (BCI's) and blunt vertebral artery injuries (BVI's), known jointly as BCVI's, are common in 'high risk' patients. The purpose is to evaluate the rate of occurrence of BCI/BVI in patients screened purely by the radiologic criteria of fracture through the carotid canal or vertebral transverse foramina, or significant cervical subluxation, noted by multidetector CT. Methods: Seventy-one patients with 108 catheterized vessels were included over a 13-month interval. The angiographic examinations were prompted by current hospital protocol, solely by the presence of fractures involving/adjacent to the carotid canal, cervical fractures involving/adjacent to the foramen transversarium, or cervical fractures with significant subluxation. The incidence of each grade of blunt injury was calculated after review of the CT scans and catheter angiograms by two neuroradiologists. Results: Two thousand and seventy-three total blunt trauma admissions occurred during the time period, with a BCVI rate of 0.92-1.0% (depending on the reviewer), similar to previous studies. Mean time to catheter angiography was 16.6 h. Of the 71 included patients, there were 11-12 BCI's and 10-12 BVI's, an overall rate of 27-30% of BCVI in the patients with foraminal fractures. Interobserver agreement in reviewing the catheter angiograms was excellent (Kappa 0.795). Of note, three internal carotid pseudoaneurysms resolved spontaneously after anticoagulation or aspirin. Conclusion: This study confirms that there is a high rate of BCVI in the presence of carotid canal or vertebral foramen fractures that are noted by multidetector CT. Utilization of purely radiologic criteria of foraminal involvement may be a significant screening tool in the decision of whether to evaluate these patients acutely by catheter or CT angiography, and for early detection of patients at risk for symptomatology, to initiate prompt, prophylactic treatment.

GLOBAL CLIMATE MODEL:A COMPREHENSIVE TOOL IN CLIMATE CHANGE IMPACT STUDIES

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Dharmaveer Singh

2015-01-01

Full Text Available There is growing concern, how and to what extent future changes in climate will affect human society and natural environments. Continuous emissions of Green House Gasses (GHGs at or above current rates will cause further warming. This, in turn, may modify global climate system during 21st century that very likely would have larger impacts than those observed during 20th century. At present, Global Climate Models (GCMs are only the most reliable tools available for studying behaviour of the climate system. This paper presents a comprehensive review of GCMs including their development and applications in climate change impacts studies. Following a discussion of the limitations of GCMs at regional and local scales, different approaches of downscaling are discussed in detail.

The comprehension of mathematic problems in primary school

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Karel Pérez Ariza

2015-05-01

Full Text Available The paper describes the result of the research project “A study of causes of difficulties in learning comprehension from an interdisciplinary perspective in Camagüey. The main objective of that study is to propose a methodology for the comprehension of mathematic problems in primary school. In designing the methodology, the characteristics of this text variety, basic principle of the theory of reading comprehension and problem solving were taking into account. In this research work several theoretical methods were used —analysis-synthesis, historical-logical, inductive-deductive— to elaborate the theoretical framework, while modeling and system approach in the methodology construction. Additionally, empirical methods were used in order to assess the knowledge about comprehension of mathematic problems; among them observation and analysis of the activity results.

Conceptual Combination During Sentence Comprehension

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Swinney, David; Love, Tracy; Walenski, Matthew; Smith, Edward E.

2008-01-01

This experiment examined the time course of integration of modifier-noun (conceptual) combinations during auditory sentence comprehension using cross-modal lexical priming. The study revealed that during ongoing comprehension, there is initial activation of features of the noun prior to activation of (emergent) features of the entire conceptual combination. These results support compositionality in conceptual combination; that is, they indicate that features of the individual words constituting a conceptual combination are activated prior to combination of the words into a new concept. PMID:17576278

The Listening Comprehension Strategies Used by College Students to Cope with the Aural Problems in EFL Classes: An Analytical Study

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Ghoneim, Nahed Mohamed Mahmoud

2013-01-01

The current study focused on the problems which students encounter while listening to the English language, the mental processes they activate in listening comprehension, and the strategies they use in different phases of comprehension. Also, it aimed to find out whether there were any differences between advanced and intermediate students in…

Subject Comprehension and Critical Thinking: An Intervention for Subject Comprehension and Critical Thinking in Mixed-Academic-Ability University Students

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Bellaera, Lauren; Debney, Lauren; Baker, Sara T.

2016-01-01

Subject comprehension and critical thinking are both key goals of higher education. However, while the former is, on the whole, successfully cultivated in undergraduate students, the latter is not. Few empirical studies have investigated the relationship between subject comprehension and critical thinking. In the present article we suggest that…

Comprehensive metabolic panel

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Metabolic panel - comprehensive; Chem-20; SMA20; Sequential multi-channel analysis with computer-20; SMAC20; Metabolic panel 20 ... Chernecky CC, Berger BJ. Comprehensive metabolic panel (CMP) - blood. In: ... Tests and Diagnostic Procedures . 6th ed. St Louis, MO: ...

Developmental relations between reading comprehension and reading strategies

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Muijselaar, M.M.L.; Swart, N.M.; Steenbeek-Planting, E.G.; Droop, W.; Verhoeven, L.T.W.; Jong, P.F. de

2017-01-01

We examined the developmental relations between knowledge of reading strategies and reading comprehension in a longitudinal study of 312 Dutch children from the beginning of fourth grade to the end of fifth grade. Measures for reading comprehension, reading strategies, reading fluency, vocabulary, and working memory were administered. A structural equation model was constructed to estimate the unique relations between reading strategies and reading comprehension, while controlling for reading...

Cognitive Correlates of Listening Comprehension

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Kim, Young-Suk; Phillips, Beth

2014-01-01

In an effort to understand cognitive foundations of oral language comprehension (i.e., listening comprehension), we examined how inhibitory control, theory of mind, and comprehension monitoring are uniquely related to listening comprehension over and above vocabulary and age. A total of 156 children in kindergarten and first grade from…

Improving Student Comprehension of Social Studies Text: A Self-Questioning Strategy for Inclusive Middle School Classes

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Berkeley, Sheri; Marshak, Lisa; Mastropieri, Margo A.; Scruggs, Thomas E.

2011-01-01

This study employed a randomized experimental design to investigate the effectiveness of a self-questioning strategy for improving student reading comprehension of grade-level social studies text material. Fifty-seven seventh grade students with a range of abilities, including English as second language learners and students with learning and…

Revisiting Sticht: The Changing Nature of the Relationship between Listening Comprehension and Reading Comprehension among Upper Elementary and Middle School Students over the Last 50 Years

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Verlaan, Wolfram; Pearce, Daniel L.; Zeng, Guang

2017-01-01

This study investigated the relationship between listening comprehension and reading comprehension to determine if environmental factors might be contributing to a possible change in the equalization age for these two comprehension modalities from what was theorized by Thomas Sticht. The study employed a counterbalanced design to measure the…

A comprehensive joint replacement program for total knee arthroplasty: a descriptive study

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Prefontaine Paul

2008-11-01

Full Text Available Abstract Background Total knee arthroplasty (TKA is a commonly performed surgical procedure in the US. It is important to have a comprehensive inpatient TKA program which maximizes outcomes while minimizing adverse events. The purpose of this study was to describe a TKA program – the Joint Replacement Program (JRP – and report post-surgical outcomes. Methods 74 candidates for a primary TKA were enrolled in the JRP. The JRP was designed to minimize complications and optimize patient-centered outcomes using a team approach including the patient, patient's family, and a multidisciplinary team of health professionals. The JRP consisted of a pre-operative class, standard pathways for medical care, comprehensive peri-operative pain management, aggressive physical therapy (PT, and proactive discharge planning. Measures included functional tests, knee range of motion (ROM, and medical record abstraction of patient demographics, length of stay, discharge disposition, and complications over a 6-month follow-up period. Results All patients achieved medical criteria for hospital discharge. The patients achieved the knee flexion ROM goal of 90° (91.7 ± 5.4°, but did not achieve the knee extension ROM goal of 0° (2.4 ± 2.6°. The length of hospital stay was two days for 53% of the patients, with 39% and 7% discharged in three and four days, respectively. All but three patients were discharged home with functional independence. 68% of these received outpatient physical therapy compared with 32% who received home physical therapy immediately after discharge. Two patients ( Conclusion The comprehensive JRP for TKA was associated with satisfactory clinical outcomes, short lengths of stay, a high percentage of patients discharged home with outpatient PT, and minimal complications. This JRP may represent an efficient, effective and safe protocol for providing care after a TKA.

The Influence of Working Memory on Listening Comprehension

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张军

2008-01-01

@@ We many notice that in listening classroom, what proficient students complain most is that they can get every word in the listening material but the most difficult thing for them is to keep in mind what they have heard. Although listening comprehension is now widely considered to be of great importance in second language learning and is extensively studied, there has not been enough research on listening comprehensionfrom the language processing perspective. And there is not too much studies involving the concept of memory in listening comprehension,especially the relationship between working memory capacity and listening comprehension.

Listening comprehension across the adult lifespan.

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Sommers, Mitchell S; Hale, Sandra; Myerson, Joel; Rose, Nathan; Tye-Murray, Nancy; Spehar, Brent

2011-01-01

Although age-related declines in perceiving spoken language are well established, the primary focus of research has been on perception of phonemes, words, and sentences. In contrast, relatively few investigations have been directed at establishing the effects of age on the comprehension of extended spoken passages. Moreover, most previous work has used extreme-group designs in which the performance of a group of young adults is contrasted with that of a group of older adults and little if any information is available regarding changes in listening comprehension across the adult lifespan. Accordingly, the goals of the current investigation were to determine whether there are age differences in listening comprehension across the adult lifespan and, if so, whether similar trajectories are observed for age-related changes in auditory sensitivity and listening comprehension. This study used a cross-sectional lifespan design in which approximately 60 individuals in each of 7 decades, from age 20 to 89 yr (a total of 433 participants), were tested on three different measures of listening comprehension. In addition, we obtained measures of auditory sensitivity from all participants. Changes in auditory sensitivity across the adult lifespan exhibited the progressive high-frequency loss typical of age-related hearing impairment. Performance on the listening comprehension measures, however, demonstrated a very different pattern, with scores on all measures remaining relatively stable until age 65 to 70 yr, after which significant declines were observed. Follow-up analyses indicated that this same general pattern was observed across three different types of passages (lectures, interviews, and narratives) and three different question types (information, integration, and inference). Multiple regression analyses indicated that low-frequency pure-tone average was the single largest contributor to age-related variance in listening comprehension for individuals older than 65 yr, but

Language Skills in Classical Chinese Text Comprehension

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Lau, Kit-ling

2018-01-01

This study used both quantitative and qualitative methods to explore the role of lower- and higher-level language skills in classical Chinese (CC) text comprehension. A CC word and sentence translation test, text comprehension test, and questionnaire were administered to 393 Secondary Four students; and 12 of these were randomly selected to…

Memory mechanisms supporting syntactic comprehension.

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Caplan, David; Waters, Gloria

2013-04-01

Efforts to characterize the memory system that supports sentence comprehension have historically drawn extensively on short-term memory as a source of mechanisms that might apply to sentences. The focus of these efforts has changed significantly in the past decade. As a result of changes in models of short-term working memory (ST-WM) and developments in models of sentence comprehension, the effort to relate entire components of an ST-WM system, such as those in the model developed by Baddeley (Nature Reviews Neuroscience 4: 829-839, 2003) to sentence comprehension has largely been replaced by an effort to relate more specific mechanisms found in modern models of ST-WM to memory processes that support one aspect of sentence comprehension--the assignment of syntactic structure (parsing) and its use in determining sentence meaning (interpretation) during sentence comprehension. In this article, we present the historical background to recent studies of the memory mechanisms that support parsing and interpretation and review recent research into this relation. We argue that the results of this research do not converge on a set of mechanisms derived from ST-WM that apply to parsing and interpretation. We argue that the memory mechanisms supporting parsing and interpretation have features that characterize another memory system that has been postulated to account for skilled performance-long-term working memory. We propose a model of the relation of different aspects of parsing and interpretation to ST-WM and long-term working memory.

A Pilot Study of Biomedical Text Comprehension using an Attention-Based Deep Neural Reader: Design and Experimental Analysis.

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Kim, Seongsoon; Park, Donghyeon; Choi, Yonghwa; Lee, Kyubum; Kim, Byounggun; Jeon, Minji; Kim, Jihye; Tan, Aik Choon; Kang, Jaewoo

2018-01-05

With the development of artificial intelligence (AI) technology centered on deep-learning, the computer has evolved to a point where it can read a given text and answer a question based on the context of the text. Such a specific task is known as the task of machine comprehension. Existing machine comprehension tasks mostly use datasets of general texts, such as news articles or elementary school-level storybooks. However, no attempt has been made to determine whether an up-to-date deep learning-based machine comprehension model can also process scientific literature containing expert-level knowledge, especially in the biomedical domain. This study aims to investigate whether a machine comprehension model can process biomedical articles as well as general texts. Since there is no dataset for the biomedical literature comprehension task, our work includes generating a large-scale question answering dataset using PubMed and manually evaluating the generated dataset. We present an attention-based deep neural model tailored to the biomedical domain. To further enhance the performance of our model, we used a pretrained word vector and biomedical entity type embedding. We also developed an ensemble method of combining the results of several independent models to reduce the variance of the answers from the models. The experimental results showed that our proposed deep neural network model outperformed the baseline model by more than 7% on the new dataset. We also evaluated human performance on the new dataset. The human evaluation result showed that our deep neural model outperformed humans in comprehension by 22% on average. In this work, we introduced a new task of machine comprehension in the biomedical domain using a deep neural model. Since there was no large-scale dataset for training deep neural models in the biomedical domain, we created the new cloze-style datasets Biomedical Knowledge Comprehension Title (BMKC_T) and Biomedical Knowledge Comprehension Last

Clinical usefulness of red cell distribution width to angiographic severity and coronary stent thrombosis

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Erdem A

2016-09-01

Full Text Available Aysun Erdem,1 Ufuk Sadik Ceylan,1 Aycan Esen,1 Ertugrul Zencirci,2 Birol Topcu,3 Kivilcim Ozden,1 Selcuk Yazici,1 Sait Terzi,1 Ayse Emre,1 Kemal Yesilcimen1 1Department of Cardiology, Siyami Ersek Thoracic and Cardiovascular Surgery Training and Research Hospital, Istanbul, Turkey; 2Department of Cardiology, Acibadem Hospital Maslak, Istanbul, Turkey; 3Department of Biostatistics, Faculty of Medicine, Namik Kemal University, Tekirdag, Turkey Background: Red cell distribution width (RDW is a quantitative measurement and shows heterogeneity of red blood cell size in peripheral blood. RDW has recently been associated with cardiovascular events and cardiovascular diseases, and it is a novel predictor of mortality. In this study, we aimed to evaluate the clinical usefulness of measuring RDW in patients with coronary stent thrombosis.Patients and methods: We retrospectively reviewed 3,925 consecutive patients who presented with acute coronary syndrome and who underwent coronary angiography at the Siyami Ersek Hospital between May 2011 and December 2013. Of the 3,925 patients, 73 patients (55 males, mean age 59±11 years, 55 with ST elevated myocardial infarction with stent thrombosis formed group 1. Another 54 consecutive patients who presented with acute coronary syndrome (without coronary stent thrombosis, 22 patients with ST elevated myocardial infarction, 44 males, mean age 54±2 years and underwent percutaneous coronary intervention in May 2011 formed group 2. Data were collected from all groups for 2 years. The RDW values were calculated from patients 1 month later at follow-up. Syntax scores were calculated for all the patients. The patients were also divided as low syntax score group and moderate–high syntax score group.Results: The patients in group 1 with stent thrombosis had significantly higher RDW level (13.85 than the patients in group 2 without stent thrombosis (12 (P<0.001. In addition, in all study patients, the moderate�

Cognitive Frailty in China: Results from China Comprehensive Geriatric Assessment Study

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Lina Ma

2017-10-01

Full Text Available ObjectiveCognitive frailty (CF refers to the co-occurrence of physical frailty (PF and cognitive impairment in persons without dementia. We aimed to explore the prevalence and associated factors of CF in China.MethodData were obtained from the China Comprehensive Geriatric Assessment Study. A total of 5,708 community-dwelling older adults without dementia were included. CF was assessed using the Mini–Mental State Examination for the evaluation of cognitive status and the Comprehensive Geriatric Assessment-Frailty Index for the evaluation of PF. Participants with both cognitive impairment and PF were classified as having CF. Sociodemographic and clinical history was also collected. Logistic analysis was used to explore the association between the associated factors and CF.ResultsThe overall crude prevalence of CF was 3.3% [95% confidence interval (CI = 3.0–4.0], and the standard prevalence of CF was 2.7% (95% CI = 2.0–3.0. The prevalence of CF was significantly higher in women than men and higher in residents of rural areas than urban areas. Moreover, the prevalence of CF was found to increase with age. Multiple factor analysis showed that depression (OR = 2.462, 95% CI = 1.066–5.687 and hearing impairment (OR = 2.713, 95% CI = 1.114–6.608 were independent associated factors of CF in elderly individuals with PF.ConclusionOur results provide the first empirical evidence of CF in China. We have identified several associated factors with CF which should be considered while assessing older adults. More studies in Chinese population with CF are demanded to confirm with our findings.

Improving Reading Comprehension Skills through the SCRATCH Program

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Papatga, Erdal; Ersoy, Ali

2016-01-01

The aim of this study was to reveal how reading comprehension skills of elementary fourth graders who have problems in reading comprehension can be improved by means of the SCRATCH program. The study was designed as a participant action research. It was carried out within a 15- week process at an elementary school with middle socio-economic level…

Comprehensive Study of Acute Effects and Recovery After Concussion

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2017-10-01

Prevent Mouthguard sensor system (Cleveland Clinic) demonstrated an ability to collect true positive head impacts, verified using video evidence...comparison of HIT System data to Prevent mouthguard data with comprehensive video analysis of all collected head impacts. • Interim anlaysis of HIM...presentation in both athlete and civilian mTBI patients and (2) test hypotheses regarding sex differences in mTBI phenotypes. The project will 33 be

Comprehensive stroke units: a review of comparative evidence and experience.

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Chan, Daniel K Y; Cordato, Dennis; O'Rourke, Fintan; Chan, Daniel L; Pollack, Michael; Middleton, Sandy; Levi, Chris

2013-06-01

Stroke unit care offers significant benefits in survival and dependency when compared to general medical ward. Most stroke units are either acute or rehabilitation, but comprehensive (combined acute and rehabilitation) model (comprehensive stroke unit) is less common. To examine different levels of evidence of comprehensive stroke unit compared to other organized inpatient stroke care and share local experience of comprehensive stroke units. Cochrane Library and Medline (1980 to December 2010) review of English language articles comparing stroke units to alternative forms of stroke care delivery, different types of stroke unit models, and differences in processes of care within different stroke unit models. Different levels of comparative evidence of comprehensive stroke units to other models of stroke units are collected. There are no randomized controlled trials directly comparing comprehensive stroke units to other stroke unit models (either acute or rehabilitation). Comprehensive stroke units are associated with reduced length of stay and greatest reduction in combined death and dependency in a meta-analysis study when compared to other stroke unit models. Comprehensive stroke units also have better length of stay and functional outcome when compared to acute or rehabilitation stroke unit models in a cross-sectional study, and better length of stay in a 'before-and-after' comparative study. Components of stroke unit care that improve outcome are multifactorial and most probably include early mobilization. A comprehensive stroke unit model has been successfully implemented in metropolitan and rural hospital settings. Comprehensive stroke units are associated with reductions in length of stay and combined death and dependency and improved functional outcomes compared to other stroke unit models. A comprehensive stroke unit model is worth considering as the preferred model of stroke unit care in the planning and delivery of metropolitan and rural stroke services

Specific Reading Comprehension Disability: Major Problem, Myth, or Misnomer?

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Spencer, Mercedes; Quinn, Jamie M.; Wagner, Richard K.

2014-01-01

The goal of the present study was to test three competing hypotheses about the nature of comprehension problems of students who are poor in reading comprehension. Participants in the study were first, second, and third graders, totaling 9 cohorts and over 425,000 participants in all. The pattern of results was consistent across all cohorts: Less than one percent of first- through third-grade students who scored as poor in reading comprehension were adequate in both decoding and vocabulary. Al...

Nursing supervision for care comprehensiveness

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Lucieli Dias Pedreschi Chaves

Full Text Available ABSTRACT Objective: To reflect on nursing supervision as a management tool for care comprehensiveness by nurses, considering its potential and limits in the current scenario. Method: A reflective study based on discourse about nursing supervision, presenting theoretical and practical concepts and approaches. Results: Limits on the exercise of supervision are related to the organization of healthcare services based on the functional and clinical model of care, in addition to possible gaps in the nurse training process and work overload. Regarding the potential, researchers emphasize that supervision is a tool for coordinating care and management actions, which may favor care comprehensiveness, and stimulate positive attitudes toward cooperation and contribution within teams, co-responsibility, and educational development at work. Final considerations: Nursing supervision may help enhance care comprehensiveness by implying continuous reflection on including the dynamics of the healthcare work process and user needs in care networks.

Relationship between Vocabulary Size and Reading Comprehension Levels of Malaysian Tertiary Students

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Angelina Wan Lin Tan

2018-01-01

Full Text Available This study investigated the relationship between vocabulary size and reading comprehension performance among students in a tertiary institution in a Malaysian context and examined the vocabulary size required for students to achieve reading comprehension at various levels of proficiency. The research questions that guided this study were: 1 What is the vocabulary size of second year diploma students studying Mass Communication?; 2 What is the reading comprehension proficiency of second year diploma students studying Mass Communication?; and 3 What vocabulary size is required for different levels of reading comprehension proficiency? This study used the quantitative approach. The participants were 53 Malaysian second-year students at a private university college in Malaysia who were reading for their Diploma in Mass Communication. The instruments used were the Vocabulary Size Test and the IELTS Reading Test (Academic Module. The findings showed that the average vocabulary size of the students was just over 6000 word families and this vocabulary size was generally insufficient for adequate reading comprehension. Students needed an average vocabulary size of about 8000 word families to achieve adequate reading comprehension and about 10000 word families to achieve proficient reading comprehension. Based on the individual student’s performance, this study did not find a linear relationship between vocabulary size and reading comprehension performance, nor was there a threshold vocabulary size for adequate reading comprehension.

The level of social relations comprehension and its impact on text comprehension in individuals with autistic spectrum disorder

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Hana Sotáková

2016-10-01

Full Text Available Background The study was carried out within the research “Reading comprehension – typical development and its risks”. The article contains data from a component study focused on 4th grade students with autism spectrum disorder (ASD who were incorporated into a group of readers with reading comprehension development risks. The main aim was to establish whether variable results in children’s reading and comprehension tests relate to the level of understanding of social relations. Participants and procedure We tested 20 students with ASD in two phases: T1 and T2. Each phase consisted of 2 individual sessions. Under the leadership of a research assistant, during each of these sessions a student would carry out the test focused on general intellectual skills, language skills, reading, and reading comprehension. For students with autistic spectrum disorder the Strange Stories test was added in order to ascertain the level of social relations understanding. Results The results in reading and reading comprehension tests among students with ASD varied significantly. Based on a correlation analysis it was found that the Strange Stories results substantially correlate with tests focused on reading, text comprehension and language skill levels. Conclusions Our research proved the following: the Strange Stories test results show that the level to which an individual is able to understand social relations and social behavior is significantly related to his/her ability to comprehend a text. Consequently, this can influence his/her learning skills as well as the quality of life in society. Cultivation of social abilities, social communication and understanding of social situations and relations is therefore necessary for compensation of autistic spectrum disorder expressions.

A Comparative Study of “Subtitled” vs. “Auditory” Documentaries Comprehension among Persian Speakers of English

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Masoud Raee Sharif

2013-03-01

Full Text Available This study set out to compare the effect of modality of presentation (subtitled vs. auditory on the retention of verbal content of documentary films among Iranian EFL students. To this end, 60 participants (30 male and 30 female students of homogeneous English proficiency were volitionally assigned to one of the two experimental conditions: English soundtrack with no subtitles (ESONSU, no soundtrack with English subtitles (NSOESU. The sample was asked to watch five five-minute documentary clips with the presentation format varied in terms of the verbal information, which was alternatively given in soundtracks and subtitles. Thus, while one group was presented with subtitled documentary excerpts, the other group watched the same clips with the sound tracks. Comparison of the two groups on Mann-Whitney U test illustrated that there is not any significant difference between the rate of comprehension of subtitled documentaries as opposed to audible documentaries. However, females were found to outperform their male counterparts in both subtitled documentaries comprehension (median = 20 vs. male median = 13 and audible documentary comprehension (females’ median = 20.5 vs. males’ median = 13.5.

Reading Comprehension and Working Memory's Executive Processes: An Intervention Study in Primary School Students

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Garcia-Madruga, Juan A.; Elosua, Maria Rosa; Gil, Laura; Gomez-Veiga, Isabel; Vila, Jose Oscar; Orjales, Isabel; Contreras, Antonio; Rodriguez, Raquel; Melero, Maria Angeles; Duque, Gonzalo

2013-01-01

Reading comprehension is a highly demanding task that involves the simultaneous process of extracting and constructing meaning in which working memory's executive processes play a crucial role. In this article, a training program on working memory's executive processes to improve reading comprehension is presented and empirically tested in two…

Comprehensive joint feedback control for standing by functional neuromuscular stimulation-a simulation study.

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Nataraj, Raviraj; Audu, Musa L; Kirsch, Robert F; Triolo, Ronald J

2010-12-01

Previous investigations of feedback control of standing after spinal cord injury (SCI) using functional neuromuscular stimulation (FNS) have primarily targeted individual joints. This study assesses the potential efficacy of comprehensive (trunk, hips, knees, and ankles) joint feedback control against postural disturbances using a bipedal, 3-D computer model of SCI stance. Proportional-derivative feedback drove an artificial neural network trained to produce muscle excitation patterns consistent with maximal joint stiffness values achievable about neutral stance given typical SCI muscle properties. Feedback gains were optimized to minimize upper extremity (UE) loading required to stabilize against disturbances. Compared to the baseline case of maximum constant muscle excitations used clinically, the controller reduced UE loading by 55% in resisting external force perturbations and by 84% during simulated one-arm functional tasks. Performance was most sensitive to inaccurate measurements of ankle plantar/dorsiflexion position and hip ab/adduction velocity feedback. In conclusion, comprehensive joint feedback demonstrates potential to markedly improve FNS standing function. However, alternative control structures capable of effective performance with fewer sensor-based feedback parameters may better facilitate clinical usage.

Exploring the Causes of Listening Comprehension Anxiety from EFL Saudi Learners' Perspectives: A Pilot Study

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Otair, Ibrahim; Aziz, Noor Hashima Abd

2017-01-01

Anxiety is an important factor in foreign language learning. Very few studies have been done on English as a Foreign Language (EFL) Saudi students in listening classes. Therefore, this pilot study was aimed at exploring the causes of listening comprehension anxiety from EFL Saudi learners' perspectives at Majmaah University, Saudi Arabia. The…

Teacher's reading comprehension: Implication for teaching practices

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Adriana Benevides Soares

2010-11-01

Full Text Available A question of interest for educational workers is the reading comprehension process, a fundamental ability for progress in more advanced years of schooling, and its effect on pedagogical practices. This is a study that explores this question. A reading comprehension instrument composed by four structural levels of text and a scale of pedagogical practice composed by four sub-scales involving: cognitive practices with linguistic focus, cognitive practices, affective and motor practices, continuous education, was used. The results of 53 children suggest a slight tendency of teacher to prioritize cognitive practices independently of their reading comprehension level.

Object orientation affects spatial language comprehension.

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Burigo, Michele; Sacchi, Simona

2013-01-01

Typical spatial descriptions, such as "The car is in front of the house," describe the position of a located object (LO; e.g., the car) in space relative to a reference object (RO) whose location is known (e.g., the house). The orientation of the RO affects spatial language comprehension via the reference frame selection process. However, the effects of the LO's orientation on spatial language have not received great attention. This study explores whether the pure geometric information of the LO (e.g., its orientation) affects spatial language comprehension using placing and production tasks. Our results suggest that the orientation of the LO influences spatial language comprehension even in the absence of functional relationships. Copyright © 2013 Cognitive Science Society, Inc.

A Comprehensive Study of Agricultural Drought Resistance and Background Drought Levels in Five Main Grain-Producing Regions of China

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Lei Kang; Hongqi Zhang

2016-01-01

Drought control and resistance affect national food security. With this in mind, we studied five main grain-producing regions of China: Sanjiang Plain, Songnen Plain, Huang-Huai-Hai Plain, the middle Yangtze River and Jianghuai region and Sichuan Basin. Using GIS technology, we evaluated the comprehensive agricultural drought situation based on major crops, the basic drought resistance by integrating multiple indicators and the comprehensive drought resistance against background agricultural ...

Developmental Relations Between Reading Comprehension and Reading Strategies

NARCIS (Netherlands)

Muijselaar, M.; Swart, N.M.; Steenbeek-Planting, E.G,.; Droop, M.; Verhoeven, L.; de Jong, P.F.

2017-01-01

We examined the developmental relations between knowledge of reading strategies and reading comprehension in a longitudinal study of 312 Dutch children from the beginning of fourth grade to the end of fifth grade. Measures for reading comprehension, reading strategies, reading fluency, vocabulary,

A comprehensive study of metal distribution in three main classes of seaweed

International Nuclear Information System (INIS)

Ryan, Siobhan; McLoughlin, Peter; O'Donovan, Orla

2012-01-01

This paper provides one of the most comprehensive studies of metal distributions in three main macroalgae species. In this novel study, levels of total, intracellular and surface bound Pb, Zn, As, Cd, Co, Cr, Cu, Mn and Ni associated with Polysiphonia lanosa (L) Tandy, Ascophyllum nodosum (L) Le Jolis, Fucus vesiculosus (L) and Ulva sp. were determined. Additionally, water and sediment metal levels were analysed to gain an insight into the relative uptake efficiencies of different macroalgal species. Samples were collected from a clean site in Fethard-on-Sea, Wexford, Ireland (52°11′53.68′N, 6°49′34.64′W), in May 2008. Results demonstrated that total, intracellular and surface bound metal levels varied according to metal and seaweed species, with the highest proportion of metals found to be intracellular. Inhibition of Mn uptake by Zn was indicated for P. lanosa. Furthermore, P. lanosa had enhanced bioaccumulation ability, with the highest Concentration Factor reported of any seaweed to date. - Highlights: ► Three main classes of seaweed were collected from the South-East coast of Ireland. ► Metal levels (total, intracellular and surface-bound) in four seaweed species were determined. ► Metal levels of seawater and sediment samples collected from the same location were quantified. ► The Concentration Factors for P. lanosa, A. nodosum, F. vesiculosus and Ulva sp., were calculated. ► Interspecies variations in seaweed metal concentrations were demonstrated. - This study, reports the most comprehensive uptake efficiencies and distributions of metals in four main seaweed sps., with P. lanosa demonstrating excellent bioaccumulation ability.

Evaluation of use of reading comprehension strategies to improve reading comprehension of adult college students with acquired brain injury.

Science.gov (United States)

Griffiths, Gina G; Sohlberg, McKay Moore; Kirk, Cecilia; Fickas, Stephen; Biancarosa, Gina

2016-01-01

Adults with mild to moderate acquired brain injury (ABI) often pursue post-secondary or professional education after their injuries in order to enter or re-enter the job market. An increasing number of these adults report problems with reading-to-learn. The problem is particularly concerning given the growing population of adult survivors of ABI. Despite the rising need, empirical evaluation of reading comprehension interventions for adults with ABI is scarce. This study used a within-subject design to evaluate whether adult college students with ABI with no more than moderate cognitive impairments benefited from using reading comprehension strategies to improve comprehension of expository text. Integrating empirical support from the cognitive rehabilitation and special education literature, the researchers designed a multi-component reading comprehension strategy package. Participants read chapters from an introductory-level college anthropology textbook in two different conditions: strategy and no-strategy. The results indicated that reading comprehension strategy use was associated with recall of more correct information units in immediate and delayed free recall tasks; more efficient recall in the delayed free recall task; and increased accuracy recognising statements from a sentence verification task designed to reflect the local and global coherence of the text. The findings support further research into using reading comprehension strategies as an intervention approach for the adult ABI population. Future research needs include identifying how to match particular reading comprehension strategies to individuals, examining whether reading comprehension performance improves further through the incorporation of systematic training, and evaluating texts from a range of disciplines and genres.

Quotient-Comprehension Chains

Directory of Open Access Journals (Sweden)

Kenta Cho

2015-11-01

Full Text Available Quotients and comprehension are fundamental mathematical constructions that can be described via adjunctions in categorical logic. This paper reveals that quotients and comprehension are related to measurement, not only in quantum logic, but also in probabilistic and classical logic. This relation is presented by a long series of examples, some of them easy, and some also highly non-trivial (esp. for von Neumann algebras. We have not yet identified a unifying theory. Nevertheless, the paper contributes towards such a theory by introducing the new quotient-and-comprehension perspective on measurement instruments, and by describing the examples on which such a theory should be built.

Improving Students' Reading Comprehension in Descriptive Text Through Anticipation Guide

OpenAIRE

Nasution, Maya Puspita

2014-01-01

This study concerrns with improving students' reading comprehension in descriptive text through anticipation guide.The objective was to investigate improvement of students' reading comprehension by applying anticipation guide. This research was conducted by using action research method. The subject of the study was grade VII students of SMP SWASTA TAMAN HARAPAN MEDAN totalling to 30 students. They were taught reading comprehension by anticipation guide. The instruments for collecting data wer...

Students' Metacomprehension Knowledge: Components That Predict Comprehension Performance

Science.gov (United States)

Zabrucky, Karen M.; Moore, DeWayne; Agler, Lin-Miao Lin; Cummings, Andrea M.

2015-01-01

In the present study, we assessed students' metacomprehension knowledge and examined the components of knowledge most related to comprehension of expository texts. We used the Revised Metacomprehension Scale (RMCS) to investigate the relations between students' metacomprehension knowledge and comprehension performance. Students who evaluated and…

EFFICIENCY OF READING COMPREHENSION TRAINING IN PUPILS LIVING IN POVERTY

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Milena Kosak Babuder

2015-09-01

Full Text Available The results of Slovene and foreign studies reveal the connection between literacy levels and the level of education, employment opportunities and consequent socio-economic status of individuals and families. Reading efficiency relating to reading comprehension is an important element of reading literacy performance. The findings of several authors indicate empirical evidence of the existence of deficits and poor reading comprehension in pupils living in poverty and stress the importance of offsetting deficits and developing reading comprehension. Results of both foreign and Slovene studies indicate that the program of reading comprehension should be implemented in this group of pupils. In the article, we want to present effectiveness of the reading comprehension improvement program in pupils living in poverty. According to the findings of our research, in which we structured and implemented the reading comprehension program for pupils living in poverty with the Metacognitive-intersentential model of reading comprehension, the reading comprehension of the experimental group pupils who participated in the program improved compared to the control group pupils who did not participate in the program. Experimental group pupils also significantly improved correctness of their reading, their vocabulary and skills of verbal expression. When the program ended, we tested its efficiency by applied tests. The results on the manifest variables indicated that the program was good and efficient for pupils who live in poverty and experience reading comprehension problems.

Differential incremental value of ultrasound carotid intima-media thickness, carotid plaque, and cardiac calcium to predict angiographic coronary artery disease across Framingham risk score strata in the APRES multicentre study.

Science.gov (United States)

Gaibazzi, Nicola; Rigo, Fausto; Facchetti, Rita; Carerj, Scipione; Giannattasio, Cristina; Moreo, Antonella; Mureddu, Gian Francesco; Salvetti, Massimo; Grolla, Elisabetta; Faden, Giacomo; Cesana, Francesca; Faggiano, Pompilio

2016-09-01

According to recent data, more accurate selection of patients undergoing coronary angiography for suspected coronary artery disease (CAD) is needed. From the Active PREvention Study multicentre prospective study, we further analyse whether carotid intima-media thickness (cIMT), carotid plaques (cPL), and echocardiographic cardiac calcium score (eCS) have incremental discriminatory and reclassification predictive value for CAD over clinical risk score in subjects undergoing coronary angiography, specifically depending on their low, intermediate, or high class of clinical risk. In eight centres, 445 subjects without history of prior CAD but with chest pain of recent onset and/or a positive/inconclusive stress test for ischaemia prospectively underwent clinically indicated elective coronary angiography after cardiac and carotid ultrasound assessments with measurements of cIMT, cPL, and eCS. The study population was divided into subjects at low (10%), intermediate (10-20%), and high (>20%) Framingham risk score (FRS). Ultrasound parameters were tested for their incremental value to predict CAD over FRS, in each pre-test risk category. No significant difference could be appreciated between the discrimination value of FRS and Diagnostic Imaging for Coronary Artery Disease score for the presence of CAD. eCS or cPL demonstrated significant incremental prediction over FRS, consistently in the three FRS categories (P risk subjects, in whom cPL was apparently not incremental over FRS, and eCS was only of borderline significance for better discrimination. Ultrasound eCS and cPL assessments were significant predictors of angiographic CAD in patients without prior CAD but with signs or symptoms suspect for CAD, independently and incrementally to FRS, across all pre-test risk probability strata, although in high-risk subjects, only eCS maintained an incremental value. The use of cIMT was not significantly incrementally useful in any FRS risk category. Published on behalf of the

On the importance of listening comprehension.

Science.gov (United States)

Hogan, Tiffany P; Adlof, Suzanne M; Alonzo, Crystle N

2014-06-01

The simple view of reading highlights the importance of two primary components which account for individual differences in reading comprehension across development: word recognition (i.e., decoding) and listening comprehension. While assessments and interventions for decoding have been the focus of pedagogy in the past several decades, the importance of listening comprehension has received less attention. This paper reviews evidence showing that listening comprehension becomes the dominating influence on reading comprehension starting even in the elementary grades. It also highlights a growing number of children who fail to develop adequate reading comprehension skills, primarily due to deficient listening comprehension skills (i.e., poor comprehenders). Finally we discuss key language influences on listening comprehension for consideration during assessment and treatment of reading disabilities.

The Impact of Texting on Comprehension

Directory of Open Access Journals (Sweden)

Jamal K. M. Ali

2015-07-01

Full Text Available This paper presents a study of the effects of texting on English language comprehension. The authors believe that English used in texting causes a lack of comprehension for English speakers, learners, and texters. Wei, Xian-hai and Jiang (2008:3 declare “In Netspeak, there are some newly-created vocabularies, which people cannot comprehend them either from their partial pronunciation or from their figures.” Crystal (2007:23 claims; “variation causes problems of comprehension and acceptability. If you speak or write differently from the way I do, we may fail to understand each other.”  In this paper, the authors conducted a questionnaire at Aligarh Muslim University to ninety respondents from five different Faculties and four different levels. To measure respondents’ comprehension of English texting, the authors gave the respondents abbreviations used by texters and asked them to write the full forms of the abbreviations. The authors found that many abbreviations were not understood, which suggested that most of the respondents did not understand and did not use these abbreviations.

Age-related differences in warning symbol comprehension and training effectiveness: effects of familiarity, complexity, and comprehensibility.

Science.gov (United States)

Lesch, M F; Horrey, W J; Wogalter, M S; Powell, W R

2011-10-01

Age-related changes in selective attention, inhibitory efficiency, and the ability to form new associations suggest that older adults may have greater difficulty with more complex and less comprehensible symbols. We examined comprehension of symbols varying in terms of ratings of familiarity, complexity, and comprehensibility, by younger (aged 18-35) and older (aged 55-70) adults. It was found that older adults have greater difficulty than younger adults in comprehending warning symbols and that accident scenario training improves comprehension. Regression analyses indicated that familiarity and comprehensibility were important in determining performance on the pre-training comprehension test by both younger and older adults. However, training eliminated the effects of stimulus characteristics for younger adults, while older adults' comprehension continued to be significantly influenced by comprehensibility. We suggest that symbol design incorporates cues to knowledge to facilitate the linkage between new knowledge (i.e. the warning symbol) and relevant knowledge in long-term memory. Statement of Relevance: Symbol characteristics play an important role in age-related differences in warning symbol comprehension. To optimise comprehension by older adults, symbols should have a clear relationship with areal-world referent. Alternatively, symbol design could incorporate cues to knowledge to facilitate the linkage between new knowledge and relevant knowledge in long-term memory.

Evaluation of interpolation methods for surface-based motion compensated tomographic reconstruction for cardiac angiographic C-arm data

Energy Technology Data Exchange (ETDEWEB)

Mueller, Kerstin; Schwemmer, Chris; Hornegger, Joachim [Pattern Recognition Lab, Department of Computer Science, Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander-Universitaet Erlangen-Nuernberg, Erlangen 91058 (Germany); Zheng Yefeng; Wang Yang [Imaging and Computer Vision, Siemens Corporate Research, Princeton, New Jersey 08540 (United States); Lauritsch, Guenter; Rohkohl, Christopher; Maier, Andreas K. [Siemens AG, Healthcare Sector, Forchheim 91301 (Germany); Schultz, Carl [Thoraxcenter, Erasmus MC, Rotterdam 3000 (Netherlands); Fahrig, Rebecca [Department of Radiology, Stanford University, Stanford, California 94305 (United States)

2013-03-15

Purpose: For interventional cardiac procedures, anatomical and functional information about the cardiac chambers is of major interest. With the technology of angiographic C-arm systems it is possible to reconstruct intraprocedural three-dimensional (3D) images from 2D rotational angiographic projection data (C-arm CT). However, 3D reconstruction of a dynamic object is a fundamental problem in C-arm CT reconstruction. The 2D projections are acquired over a scan time of several seconds, thus the projection data show different states of the heart. A standard FDK reconstruction algorithm would use all acquired data for a filtered backprojection and result in a motion-blurred image. In this approach, a motion compensated reconstruction algorithm requiring knowledge of the 3D heart motion is used. The motion is estimated from a previously presented 3D dynamic surface model. This dynamic surface model results in a sparse motion vector field (MVF) defined at control points. In order to perform a motion compensated reconstruction, a dense motion vector field is required. The dense MVF is generated by interpolation of the sparse MVF. Therefore, the influence of different motion interpolation methods on the reconstructed image quality is evaluated. Methods: Four different interpolation methods, thin-plate splines (TPS), Shepard's method, a smoothed weighting function, and a simple averaging, were evaluated. The reconstruction quality was measured on phantom data, a porcine model as well as on in vivo clinical data sets. As a quality index, the 2D overlap of the forward projected motion compensated reconstructed ventricle and the segmented 2D ventricle blood pool was quantitatively measured with the Dice similarity coefficient and the mean deviation between extracted ventricle contours. For the phantom data set, the normalized root mean square error (nRMSE) and the universal quality index (UQI) were also evaluated in 3D image space. Results: The quantitative evaluation of

Reading comprehension in Parkinson's disease.

Science.gov (United States)

Murray, Laura L; Rutledge, Stefanie

2014-05-01

Although individuals with Parkinson's disease (PD) self-report reading problems and experience difficulties in cognitive-linguistic functions that support discourse-level reading, prior research has primarily focused on sentence-level processing and auditory comprehension. Accordingly, the authors investigated the presence and nature of reading comprehension in PD, hypothesizing that (a) individuals with PD would display impaired accuracy and/or speed on reading comprehension tests and (b) reading performances would be correlated with cognitive test results. Eleven adults with PD and 9 age- and education-matched control participants completed tests that evaluated reading comprehension; general language and cognitive abilities; and aspects of attention, memory, and executive functioning. The PD group obtained significantly lower scores on several, but not all, reading comprehension, language, and cognitive measures. Memory, language, and disease severity were significantly correlated with reading comprehension for the PD group. Individuals in the early stages of PD without dementia or broad cognitive deficits can display reading comprehension difficulties, particularly for high- versus basic-level reading tasks. These reading difficulties are most closely related to memory, high-level language, and PD symptom severity status. The findings warrant additional research to delineate further the types and nature of reading comprehension impairments experienced by individuals with PD.

Comparison of a Simple Angiographic Approach With a Synergy Between Percutaneous Coronary Intervention With Taxus and Cardiac Surgery Score-Based Approach for Left Main Coronary Artery Stenting: A Pooled Analysis of Serial PRECOMBAT (Premier of Randomized Comparison of Bypass Surgery Versus Angioplasty Using Sirolimus-Eluting Stent in Patients With Left Main Coronary Artery Disease) Studies.

Science.gov (United States)

Lee, Pil Hyung; Lee, Jong-Young; Lee, Cheol Whan; Kim, Seon-Ok; Ahn, Jung-Min; Park, Duk-Woo; Kang, Soo-Jin; Lee, Seung-Whan; Kim, Young-Hak; Park, Seong-Wook; Park, Seung-Jung

2018-01-01

The applicability of Synergy Between Percutaneous Coronary Intervention With Taxus and Cardiac Surgery scores to left main coronary artery disease (CAD) has been questioned. A simplified alternative is needed for guiding decision making. We evaluated the prognostic value of a simplified angiographic classification in comparison with a Synergy Between Percutaneous Coronary Intervention With Taxus and Cardiac Surgery score-based approach for patients with left main CAD undergoing drug-eluting stent implantation. The proposed approach classified left main CAD as either extensive (n=819), defined as left main bifurcation lesions with an involvement of ostial left circumflex artery or as any left main lesion plus multivessel CAD, or limited (n=453), defined as ostial/midshaft lesions or left main bifurcation lesions without an involvement of ostium of left circumflex artery, alone or plus 1-vessel disease. The databases from 4 prospective Premier of Randomized Comparison of Bypass Surgery versus Angioplasty Using Sirolimus-Eluting Stent in Patients with Left Main Coronary Artery Disease studies were pooled, and the primary outcome was a major adverse cardiac event, defined as death, myocardial infarction, or repeat revascularization. During follow-up (median 38 months; interquartile range, 36-61 months), the risk for major adverse cardiac event was significantly higher with extensive than with limited left main CAD (adjusted hazard ratio, 2.13; 95% confidence interval, 1.54-2.94; P Synergy Between Percutaneous Coronary Intervention With Taxus and Cardiac Surgery score tertiles did not effectively stratify these 2 outcome measures. Compared with Synergy Between Percutaneous Coronary Intervention With Taxus and Cardiac Surgery scores, the simpler angiographic approach provided better discrimination for future cardiovascular events in patients with left main CAD undergoing drug-eluting stent implantation. © 2018 American Heart Association, Inc.

Mental juggling: when does multitasking impair reading comprehension?

Science.gov (United States)

Cho, Kit W; Altarriba, Jeanette; Popiel, Maximilian

2015-01-01

The present study investigated the conditions under which multitasking impairs reading comprehension. Participants read prose passages (the primary task), some of which required them to perform a secondary task. In Experiment 1, we compared two different types of secondary tasks (answering trivia questions and solving math problems). Reading comprehension was assessed using a multiple-choice test that measured both factual and conceptual knowledge. The results showed no observable detrimental effects associated with multitasking. In Experiment 2, the secondary task was a cognitive load task that required participants to remember a string of numbers while reading the passages. Performance on the reading comprehension test was lower in the cognitive load conditions relative to the no-load condition. The present study delineates the conditions under which multitasking can impair or have no effect on reading comprehension. These results further our understanding of our capacity to multitask and have practical implications in our technologically advanced society in which multitasking has become commonplace.

Halifax Lateral Pipeline Project : comprehensive study report

International Nuclear Information System (INIS)

1998-12-01

The National Energy Board has requested the preparation of a comprehensive study report (CSR) for the proposed Halifax Lateral Pipeline Project in support of Maritimes and Northeast Pipeline Company's proposal to construct the lateral pipeline to transport natural gas produced in offshore Nova Scotia to the Tufts Cove electric generating station in the Halifax Regional Municipality. The project will also enhance the access of natural gas to potential markets located along the pipeline route. This CSR was prepared according to guidelines of the Canadian Environmental Assessment Agency. The report presents: (1) an overview of the project, (2) a summary of the regulatory requirements for assessment, (3) a description of the environmental assessment and regulatory process to date, (4) a summary of the predicted residual environmental and socio-economic effects associated with the project, and (5) a summary of the public consultation process. The environmental and socio-economic assessment focused on these eleven issues: groundwater resources, surface water resources, wetlands, soils, air quality, fish habitat, rare herpetiles, mammals, avifauna, rare plants and archaeological heritage resources. The report identified potential interactions between the project and valued socio-economic and environmental components. These were addressed in combination with recommended mitigative measures to reduce potential adverse effects. It was concluded that the overall environmental effects from the proposed project are likely to be minimal and can be effectively managed with good environmental management methods. 14 refs., 5 tabs., 5 figs., 2 appendices

Study on comprehensive planning of rocky desertification in karst area of Chongqing

Science.gov (United States)

Zang, Yajun

2017-11-01

Chongqing is a key area for comprehensive treatment of rocky desertification in karst areas of china. Strengthening the comprehensive management of karst rocky desertification area, for the maintenance of ecological safety of Three Gorges Reservoir area, expanding the karst rocky desertification area people survival and development space, and improving the regional ecological conditions, have important practical significance to the construction of ecological civilization and building a harmonious society. Based on the investigation, analysis and arrangement of the data in the rocky desertification area, the paper puts forward the corresponding measures and phased targets for the treatment of the Rocky Desertification in the karst areas of Chongqing.

Correlation of Admission Heart Rate With Angiographic and Clinical Outcomes in Patients With Right Coronary Artery ST-Segment Elevation Myocardial Infarction Undergoing Primary Percutaneous Coronary Intervention: HORIZONS-AMI (The Harmonizing Outcomes With Revascularization and Stents in Acute Myocardial Infarction) Trial.

Science.gov (United States)

Kosmidou, Ioanna; McAndrew, Thomas; Redfors, Björn; Embacher, Monica; Dizon, José M; Mehran, Roxana; Ben-Yehuda, Ori; Mintz, Gary S; Stone, Gregg W

2017-07-19

Bradycardia on presentation is frequently observed in patients with right coronary artery ST-segment elevation myocardial infarction, but it is largely unknown whether it predicts poor angiographic or clinical outcomes in that patient population. We sought to determine the prognostic implications of admission heart rate (AHR) in patients with ST-segment elevation myocardial infarction and a right coronary artery culprit lesion. We analyzed 1460 patients with ST-segment elevation myocardial infarction and a right coronary artery culprit lesion enrolled in the randomized HORIZONS-AMI (Harmonizing Outcomes with Revascularization and Stents in Acute Myocardial Infarction) trial who underwent primary percutaneous coronary intervention. Patients presenting with high-grade atrioventricular block were excluded. Outcomes were examined according to AHR range (AHR 100 beats per minute). Angiographic analysis showed no significant association between AHR and lesion location or complexity. On multivariate analysis, admission bradycardia (AHR ST-segment elevation myocardial infarction and a right coronary artery culprit lesion undergoing primary percutaneous coronary intervention, admission bradycardia was not associated with increased mortality or major adverse cardiac events at 1 year. URL: https://www.clinicaltrials.gov. Unique identifier: NCT00433966. © 2017 The Authors. Published on behalf of the American Heart Association, Inc., by Wiley.

Using Comprehensive Feature Lists to Bias Medical Diagnosis

Science.gov (United States)

Kulatunga-Moruzi, Chan; Brooks, Lee R.; Norman, Geoffrey R.

2004-01-01

Clinicians routinely report fewer features in a case than they subsequently agree are present. The authors report studies that assess the effect of considering a more comprehensive description than physicians usually offer. These comprehensive descriptions were generated from photographs of dermatology and internal medicine and were complete and…

Fundamental Reform of Payment for Adult Primary Care: Comprehensive Payment for Comprehensive Care

Science.gov (United States)

Berenson, Robert A.; Schoenbaum, Stephen C.; Gardner, Laurence B.

2007-01-01

Primary care is essential to the effective and efficient functioning of health care delivery systems, yet there is an impending crisis in the field due in part to a dysfunctional payment system. We present a fundamentally new model of payment for primary care, replacing encounter-based imbursement with comprehensive payment for comprehensive care. Unlike former iterations of primary care capitation (which simply bundled inadequate fee-for-service payments), our comprehensive payment model represents new investment in adult primary care, with substantial increases in payment over current levels. The comprehensive payment is directed to practices to include support for the modern systems and teams essential to the delivery of comprehensive, coordinated care. Income to primary physicians is increased commensurate with the high level of responsibility expected. To ensure optimal allocation of resources and the rewarding of desired outcomes, the comprehensive payment is needs/risk-adjusted and performance-based. Our model establishes a new social contract with the primary care community, substantially increasing payment in return for achieving important societal health system goals, including improved accessibility, quality, safety, and efficiency. Attainment of these goals should help offset and justify the costs of the investment. Field tests of this and other new models of payment for primary care are urgently needed. PMID:17356977

A Comparative Study of Authentic Listening Materials and their Simplified Versions on the Listening Comprehension and Motivation of Iranian EFL Learners

Directory of Open Access Journals (Sweden)

Hossein Vossoughi

2010-11-01

Full Text Available The present study was an attempt, to empirically investigate if there was any significant difference between authentic listening materials and their simplified version in terms of the listening comprehension of Iranian EFL learners. To this end, two groups of thirty subjects were chosen. One group received authentic listening materials and the other group received the same topic in simplified version through ten sessions. The subjects studied Top Notch Book, level 3. The listening parts were followed with seven listening comprehension questions to assess the listening comprehension of the subjects. Then, at the end of the course, the listening comprehension scores of the two groups were compared by a T-Test. The result showed that simplified demonstration of materials had a benefit over the use of authentic version. A questionnaire was also given to the subjects at the beginning and at the end of the course to find out their motivation toward using authentic or simplified materials. The result indicated that there was no significant difference between two groups in terms of motivation.

Measuring Speech Comprehensibility in Students with Down Syndrome

Science.gov (United States)

Yoder, Paul J.; Woynaroski, Tiffany; Camarata, Stephen

2016-01-01

Purpose: There is an ongoing need to develop assessments of spontaneous speech that focus on whether the child's utterances are comprehensible to listeners. This study sought to identify the attributes of a stable ratings-based measure of speech comprehensibility, which enabled examining the criterion-related validity of an orthography-based…

The effect of listening comprehension skills on students ...

African Journals Online (AJOL)

This paper presents the report of a study that investigated the effects of listening comprehension skill training on students' performance in Oral English Test. To investigate the effects that the teaching of listening comprehension skills would have on the performance in Oral English test, 82 Senior Secondary School 2 ...

Cognitive Modules Utilized for Narrative Comprehension in Children: A Functional Magnetic Resonance Imaging Study

OpenAIRE

Schmithorst, Vincent J.; Holland, Scott K.; Plante, Elena

2005-01-01

The ability to comprehend narratives constitutes an important component of human development and experience. The neural correlates of auditory narrative comprehension in children were investigated in a large-scale functional magnetic resonance imaging (fMRI) study involving 313 subjects ages 5–18. Using group Independent Component Analysis (ICA), bilateral task-related components were found comprising the primary auditory cortex, the mid-superior temporal gyrus, the hippocampus, the angular g...

Developing a More Comprehensive SOA Governance Framework by Using a Comparative Study Approach

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Fazilat Hojaji

2014-02-01

Full Text Available Many companies have adopted Service-Oriented Architecture (SOA as an approach to improve agility and increase performance of system development.However, deploying SOA has been encountered to some challenges and problems including difficulties in designing effective decision structures and building a SOA roadmap, lack of service funding and lack of consistent governance processes. Therefore, to address SOA challenges, organizations require a comprehensive and applicable SOA governance framework to implement management and control mechanisms. Study of existing SOA governance frameworks reveals that these frameworks are not expressive enough to cover all important elements of SOA governance and also, the y have very little discussions and clarifications regarding underpinning structures such as SOA processes and activities, governance procedures and measurement metrics. In this paper, in the process of proposing a new SOA governance framework, a set of important elements for a desired SOA governance framework is proposed. Based on these elements, a more comprehensive and expressive framework is developed based on governance structure of COBIT. It focuses on covering SOA governance elements and resolving the shortcomings of the existing frameworks and can delivers an appropriate solution to help enable effective SOA governance.

Children's Comprehension of Live Theatre.

Science.gov (United States)

Klein, Jeanne; Fitch, Marguerite

Two studies investigate the way in which children make sense of a play and the visual, aural, and psychological components of theatre which contribute to this comprehension. In the first study, 32 fifth graders saw "Don Quixote of La Mancha." In the second study, 45 third graders saw "Monkey, Monkey" (about the Chinese Monkey King). The day after…

Sentence comprehension following moderate closed head injury in adults.

Science.gov (United States)

Leikin, Mark; Ibrahim, Raphiq; Aharon-Peretz, Judith

2012-09-01

The current study explores sentence comprehension impairments among adults following moderate closed head injury. It was hypothesized that if the factor of syntactic complexity significantly affects sentence comprehension in these patients, it would testify to the existence of syntactic processing deficit along with working-memory problems. Thirty-six adults (18 closed head injury patients and 18 healthy controls matched in age, gender, and IQ) participated in the study. A picture-sentence matching task together with various tests for memory, language, and reading abilities were used to explore whether sentence comprehension impairments exist as a result of a deficit in syntactic processing or of working-memory dysfunction. Results indicate significant impairment in sentence comprehension among adults with closed head injury compared with their non-head-injured peers. Results also reveal that closed head injury patients demonstrate considerable decline in working memory, short-term memory, and semantic knowledge. Analysis of the results shows that memory impairment and syntactic complexity contribute significantly to sentence comprehension difficulties in closed head injury patients. At the same time, the presentation mode (spoken or written language) was found to have no effect on comprehension among adults with closed head injury, and their reading abilities appear to be relatively intact.

Spectrum of physics comprehension

International Nuclear Information System (INIS)

Blasiak, W; Godlewska, M; Rosiek, R; Wcislo, D

2012-01-01

The paper presents the results of research on the relationship between self-assessed comprehension of physics lectures and final grades of junior high school students (aged 13-15), high school students (aged 16-18) and physics students at the Pedagogical University of Cracow, Poland (aged 21). Students' declared level of comprehension was measured during a physics lecture on a prearranged scale of 1-10 with the use of a personal response system designed for the purpose of this experiment. Through the use of this tool, we obtained about 2000 computer records of students' declared comprehension of a 45 min lecture, which we named ‘the spectrum of comprehension’. In this paper, we present and analyse the correlation between students' declared comprehension of the content presented in the lecture and their final learning results. (paper)

Angiographic evaluation

International Nuclear Information System (INIS)

Castaneda-Zuniga, W.R.

1986-01-01

Failure of a transplanted kidney may be caused by any of several factors requiring different methods of management. It is thus necessary to distinguish between rejection, acute tubular necrosis, obstruction of the main blood vessels in the graft, and obstruction of the ureter. Careful evaluation is particularly important when cadaver kidneys are used, for which the functional 2-year survival rate is only 40-50%, compared with 70-80% for living related donor kidneys. Formerly renal transplant angiography was often performed to differentiate between acute rejection and acute ischemic tubular necrosis as the cause of graft dysfunction in the immediate postoperative period. Now, however, angiography for the patient with a failing graft is restricted mainly to the search for renal artery stenosis and arterial or renal vein thrombosis. Although the study may be specific when a full-blown pattern of rejection is present, routine angiography has proved to be of little value when rejection is suspected

Specific Reading Comprehension Disability: Major Problem, Myth, or Misnomer?

Science.gov (United States)

Spencer, Mercedes; Quinn, Jamie M.; Wagner, Richard K.

2014-01-01

The goal of the present study was to test three competing hypotheses about the nature of comprehension problems of students who are poor in reading comprehension. Participants in the study were first, second, and third graders, totaling nine cohorts and over 425,000 participants in all. The pattern of results was consistent across all cohorts:…

The role of phonological awareness in reading comprehension

Directory of Open Access Journals (Sweden)

Maria Silvia Cárnio

Full Text Available ABSTRACT Purpose: to characterize the performance of 4th grade-Elementary School students with and without signs of reading and writing disorders as for phonological awareness and reading comprehension, and also verify possible correlations between them. Methods: 60 children enrolled in the 4th grade of Elementary School from two public schools, whose parents signed the Informed Consent Form, participated in the present study. They were selected and organized in groups, with and without signs of reading and writing disorders. All students were individually assessed regarding their phonological awareness and reading comprehension of sentences and texts through standardized tests. The data underwent statistical analysis. Results: those with signs of reading and writing disorders showed the lowest performance in the reading comprehension of sentences and texts. A correlation was found between phonological awareness and reading comprehension of sentences and texts in both groups. Conclusion: students with no signs of reading and writing disorders had a higher performance in the skills assessed. The correlation found between phonological awareness and reading comprehension of sentences and texts shows not only the importance of metaphonological skills for a proficient reading, but also for a comprehensive one.

CT and angiographic analysis of posterior communicating artery aneurysms: What factors influence the amount of subarachnoid blood?

International Nuclear Information System (INIS)

Kim, Young Min; Jung, Kun Sik; Rho, Myung Ho; Choi, Pil Youb; Sung, Young Soon; Kwon, Jae Soo; Lee, Sang Wook

1998-01-01

To determine how clinical and angiographic factors relate to the amount of subarachnoid blood detected by computerized tomography in patients with a ruptured aneurysm. Between January 1996 and December 1997, 22 patients with a posterior communicating artery aneurysm were retrospectively evaluated. Oval(three of four cases), funnel(both cases), and daughter-sac (four of five cases) types of aneurysmal sac were found among the 13 patients with a large amount of subarachnoid blood;eight of these had a past history of hyertension or diabetes. Seven of eleven cases of cylindricaltype aneurysmal sac were found among the 9 patients with a small amount of sularachnoid blood;eight of these had no past history of hypertension or diabetes. The average S/N ratio (ratio of maximum sac length to neck diameter) of patients with a small amount of blood was higher than that of patients with a large amount of blood(2.72 vs 2.07). Although many factors influence the amount of subarachnoid blood in an aneurysmal rupture, we found that a large amount of blood was frequently present in the oval, funnel and daughter sac types of aneurysm, when S/N ratio was low, and when an underlying disease such as hypertension or diabetes was present. Conversely, a small amount of blood was present in the cylindrical type, when S/N ratio was high, and where there was no underlying disease.=20

Advanced 2-dimensional quantitative coronary angiographic analysis for prediction of fractional flow reserve in intermediate coronary stenoses.

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Opolski, Maksymilian P; Pregowski, Jerzy; Kruk, Mariusz; Kepka, Cezary; Staruch, Adam D; Witkowski, Adam

2014-07-01

The widespread clinical application of coronary computed tomography angiography (CCTA) has resulted in increased referral patterns of patients with intermediate coronary stenoses to invasive coronary angiography. We evaluated the application of advanced quantitative coronary angiography (A-QCA) for predicting fractional flow reserve (FFR) in intermediate coronary lesions detected on CCTA. Fifty-six patients with 66 single intermediate coronary lesions (≥ 50% to 80% stenosis) on CCTA prospectively underwent coronary angiography and FFR. A-QCA including calculation of the Poiseuille-based index defined as the ratio of lesion length to the fourth power of the minimal lumen diameter (MLD) was performed. Significant stenosis was defined as FFR ≤ 0.80. The mean FFR was 0.86 ± 0.09, and 18 lesions (27%) were functionally significant. FFR correlated with lesion length (R=-0.303, P=0.013), MLD (R=0.527, P44%, and >69%, respectively (maximum negative predictive value of 94% for MLA, maximum positive predictive value of 58% for diameter stenosis). The Poiseuille-based index was the most accurate (C statistic 0.86, sensitivity 100%, specificity 71%, positive predictive value 56%, and negative predictive value 100%) predictor of FFR ≤ 0.80, but showed the lowest interobserver agreement (intraclass correlation coefficient 0.37). A-QCA might be used to rule out significant ischemia in intermediate stenoses detected by CCTA. The diagnostic application of the Poiseuille-based angiographic index is precluded by its high interobserver variability.

Visualization of microvessels with in-house micro-angiography

International Nuclear Information System (INIS)

Chiku, Masaaki; Nishigami, Kazuhiro; Takeshita, Satoshi

2005-01-01

Although therapeutic angiogenesis improved critical limb ischemia in humans, microvessels promoted by therapeutic angiogenesis needed further improvement to be visualized well by conventional angiographic system, because of its limited spatial resolution of 200 μm. We have developed an in-house micro-angiographic system consisting of a high-voltage power X-ray source and a detecting system with high levels of spatial resolution and sensitivity. The in-house microvessel angiographic system demonstrated its ability to evaluate the function of microvessels in vivo, as well as to visualize them with higher precision than the conventional angiographic system. The findings of our study suggest that a novel micro-angiographic system may be useful in evaluating the efficacy of therapeutic angiogenesis in clinical settings. (author)

Deaf Education Teacher Preparation: A Phenomenological Case Study of a Graduate Program with a Comprehensive Philosophy

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Engler, Karen S.; MacGregor, Cynthia J.

2018-01-01

At a time when deaf education teacher preparation programs are declining in number, little is known about their actual effectiveness. A phenomenological case study of a graduate-level comprehensive deaf education teacher preparation program at a midwestern university explored empowered and enabled learning of teacher candidates using the Missouri…

Empirical study of the effects of discourse markers on the reading comprehension of Spanish students of English as a foreign language

Directory of Open Access Journals (Sweden)

Ana Cristina Lahuerta Martínez

2009-12-01

Full Text Available The aim of this work is to analyse how Spanish readers react to English discourse markers in a text. We carry out an empirical study in which we ask three research question: (a if there is any relationship between presence of discourse markers or absence of discourse markers and reading comprehension in English as a foreign language, (b if there is any relationship between the readers’ proficiency in English and the effect of the presence or absence of discourse markers on reading comprehension and, (c if there is any relationship between the readers’ age, sex, competence as learners and as learners of English, and the effect of the presence or absence of discourse markers on reading comprehension. The results obtained show that discourse markers enhance reading comprehension in foreign language reading, and that the more successful students tend to use discourse markers as aids to help their reading comprehension. This latter result is nevertheless limited by the possible effect of the readers’ familiarity with the topic of the text and points to a need for further investigation.

Glosses, Comprehension, and Strategy Use

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Ko, Myong Hee

2005-01-01

This study, using both qualitative and quantitative measures, investigates how different types of gloss conditions affect Korean college students' reading comprehension. One hundred and six undergraduates at a university in Korea participated in the study. Twelve were assigned to think aloud, and the rest (ninety-four) took part in the main study…

Comprehensive Dataset and Reports of the Mamala Bay Study during 1993-1995 on Oahu, Hawaii (NODC Accession 0000030)

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National Oceanic and Atmospheric Administration, Department of Commerce — This accession contains comprehensive dataset and reports collected in support of the Mamala Bay Study during 1993-1995. Physical, chemical, biological, and...

Dichotic listening performance predicts language comprehension.

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Asbjørnsen, Arve E; Helland, Turid

2006-05-01

Dichotic listening performance is considered a reliable and valid procedure for the assessment of language lateralisation in the brain. However, the documentation of a relationship between language functions and dichotic listening performance is sparse, although it is accepted that dichotic listening measures language perception. In particular, language comprehension should show close correspondence to perception of language stimuli. In the present study, we tested samples of reading-impaired and normally achieving children between 10 and 13 years of age with tests of reading skills, language comprehension, and dichotic listening to consonant-vowel (CV) syllables. A high correlation between the language scores and the dichotic listening performance was expected. However, since the left ear score is believed to be an error when assessing language laterality, covariation was expected for the right ear scores only. In addition, directing attention to one ear input was believed to reduce the influence of random factors, and thus show a more concise estimate of left hemisphere language capacity. Thus, a stronger correlation between language comprehension skills and the dichotic listening performance when attending to the right ear was expected. The analyses yielded a positive correlation between the right ear score in DL and language comprehension, an effect that was stronger when attending to the right ear. The present results confirm the assumption that dichotic listening with CV syllables measures an aspect of language perception and language skills that is related to general language comprehension.

A study of the international trend and comprehensive enhancement program on the Nuclear Power Plant safety

International Nuclear Information System (INIS)

Jang, Soon Hong; Cho, Nam Jin; Paek, Won Phil

1990-12-01

The objectives of this study are as follows : overview of the international trend related to the safety of Nuclear Power Plant(NPPs), study of the present status of NPP safety in Korea in aspects of design, construction and operation, suggestion of the comprehensive program to improve NPP safety in Korea. The results of this study can contribute to improve the safety of existing and future NPPs, and to establish the severe accident policy in Korea

A study of the international trend and comprehensive enhancement program on the Nuclear Power Plant safety

Energy Technology Data Exchange (ETDEWEB)

Jang, Soon Hong; Cho, Nam Jin; Paek, Won Phil [Korea Advanced Institute of Science and Technology, Taejon (Korea, Republic of)

1990-12-15

The objectives of this study are as follows : overview of the international trend related to the safety of Nuclear Power Plant(NPPs), study of the present status of NPP safety in Korea in aspects of design, construction and operation, suggestion of the comprehensive program to improve NPP safety in Korea. The results of this study can contribute to improve the safety of existing and future NPPs, and to establish the severe accident policy in Korea.

Deficits in working memory, reading comprehension and arithmetic skills in children with mouth breathing syndrome: analytical cross-sectional study.

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Kuroishi, Rita Cristina Sadako; Garcia, Ricardo Basso; Valera, Fabiana Cardoso Pereira; Anselmo-Lima, Wilma Terezinha; Fukuda, Marisa Tomoe Hebihara

2015-01-01

Mouth breathing syndrome is very common among school-age children, and it is possibly related to learning difficulties and low academic achievement. In this study, we investigated working memory, reading comprehension and arithmetic skills in children with nasal and mouth breathing. Analytical cross-sectional study with control group conducted in a public university hospital. 42 children (mean age = 8.7 years) who had been identified as mouth breathers were compared with a control group (mean age = 8.4 years) matched for age and schooling. All the participants underwent a clinical interview, tone audiometry, otorhinolaryngological evaluation and cognitive assessment of phonological working memory (numbers and pseudowords), reading comprehension and arithmetic skills. Children with mouth breathing had poorer performance than controls, regarding reading comprehension (P = 0.006), arithmetic (P = 0.025) and working memory for pseudowords (P = 0.002), but not for numbers (P = 0.76). Children with mouth breathing have low academic achievement and poorer phonological working memory than controls. Teachers and healthcare professionals should be aware of the association of mouth breathing with children's physical and cognitive health.

The semantic network, lexical access, and reading comprehension in monolingual and bilingual children : An individual differences study

NARCIS (Netherlands)

Spätgens, T.; Schoonen, R.

Using a semantic priming experiment, the influence of lexical access and knowledge of semantic relations on reading comprehension was studied in Dutch monolingual and bilingual minority children. Both context-independent semantic relations in the form of category coordinates and context-dependent

Intermittent Theta-Burst Stimulation of the Right Dorsolateral Prefrontal Cortex to Promote Metaphor Comprehension in Parkinson Disease: A Case Study.

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Tremblay, Christina; Monetta, Laura; Langlois, Mélanie; Schneider, Cyril

2016-01-01

This single-case research-designed study explored whether intermittent theta-burst stimulation (iTBS) of the right dorsolateral prefrontal cortex (DLPFC) could improve metaphor comprehension in people with Parkinson disease (PD) and language impairments. A right-handed participant with PD diagnosed 9 years ago, receiving long-term treatment with levodopa, and with metaphor comprehension impairment was recruited to undergo 10 sessions of sham stimulation (in 2wk), a washout period (6wk), and then 10 sessions of iTBS (in 2wk). Clinical scores of metaphor comprehension and motor evaluation (Unified Parkinson Disease Rating Scale part III) and transcranial magnetic stimulation to test the excitability of the primary motor cortex (M1) were used at baseline, postsham, post-iTBS, and at 3 follow-ups (8, 14, and 20wk post-iTBS). Metaphor comprehension was improved after iTBS, and the highest scores were obtained 8 weeks later (P=.01). This improvement was correlated with the increase of the right M1 excitability (r=-.86, P=.03) and with the decrease of transcallosal inhibition latency from the left to the right hemisphere (r=-.88, P=.02). Sham yielded no effect (P>.05). Administration of iTBS over the right DLPFC improved metaphor comprehension likely by a long-term influence on brain synaptic plasticity, including improvement of interhemispheric dialogue. More studies are warranted to confirm these findings in larger samples of participants with PD. Copyright © 2016 American Congress of Rehabilitation Medicine. Published by Elsevier Inc. All rights reserved.

Comprehensive Joint Feedback Control for Standing by Functional Neuromuscular Stimulation – a Simulation Study

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Nataraj, Raviraj; Audu, Musa L.; Kirsch, Robert F.; Triolo, Ronald J.

2013-01-01

Previous investigations of feedback control of standing after spinal cord injury (SCI) using functional neuromuscular stimulation (FNS) have primarily targeted individual joints. This study assesses the potential efficacy of comprehensive (trunk, hips, knees, and ankles) joint-feedback control against postural disturbances using a bipedal, three-dimensional computer model of SCI stance. Proportional-derivative feedback drove an artificial neural network trained to produce muscle excitation patterns consistent with maximal joint stiffness values achievable about neutral stance given typical SCI muscle properties. Feedback gains were optimized to minimize upper extremity (UE) loading required to stabilize against disturbances. Compared to the baseline case of maximum constant muscle excitations used clinically, the controller reduced UE loading by 55% in resisting external force perturbations and by 84% during simulated one-arm functional tasks. Performance was most sensitive to inaccurate measurements of ankle plantar/dorsiflexion position and hip ab/adduction velocity feedback. In conclusion, comprehensive joint-feedback demonstrates potential to markedly improve FNS standing function. However, alternative control structures capable of effective performance with fewer sensor-based feedback parameters may better facilitate clinical usage. PMID:20923741

Does comprehensive redevelopment change the housing price gradient? A case study in Mongkok, Hong Kong

Directory of Open Access Journals (Sweden)

Yung Yau

2011-01-01

Full Text Available Urban decay is an inevitable outcome of the growth of most cities, including Hong Kong. Many old buildings in Hong Kong are dilapidated, and it is urgent to tackle urban decay in the city. Redeveloping dilapidated buildings has long been regarded as an effective solution to this urban problem. Yet, as suggested in the literature, redevelopment may be responsible for gentrifying neighbourhoods because it pushes up property and rental prices near redeveloped sites. However, there are still few empirical studies on how comprehensive redevelopment affects housing values in a neighbourhood. In this light, this study investigates the impacts of the Urban Renewal Authority’s Argyle Street / Shanghai Street Redevelopment Project on the transaction prices of nearby housing. A set of panel data is employed and the change in the spatial price gradient before and after the redevelopment project is explored. The findings suggest that proximity to the project site had a significant positive impact on housing prices before the project. However, no change was seen in the spatial price gradient after completion of the project. These results confirm the findings of a previous study that housing prices do not respond to the change in the environmental quality resulting from comprehensive redevelopment.

Improving text comprehension strategies in reading and listening settings

NARCIS (Netherlands)

Brand-Gruwel, S; Aarnoutse, CAJ; van den Bos, KP

Traditional intervention programs for children with decoding and reading comprehension problems often focus on remediation of the decoding ability. The goal of this study was to determine whether it is possible to teach these children text comprehension strategies. The subjects were fourth-grade