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Sample records for radiocardiography

  1. Evaluation of the cardiac efficiency by means of functional radiocardiography

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    Scheibe, J; Stoll, W [Friedrich-Schiller-Universitaet, Jena (German Democratic Republic). Bereich Medizin

    1982-01-01

    A new method of evaluating the cardiac efficiency by means of radiocardiography performed on exertion with /sup 113m/InCl is reported. Analysis of stroke volume, end diastolic volume and of the quotient of cardiac output to end diastolic volume on exertion enables an adequate evaluation of the actual myocardial efficiency.

  2. Measurement of effective left ventricular ejection fraction by radiocardiography associated with cardiac chamber scanning

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    de Vernejoul, P; Fauchet, M; Rimbert, J -N; Gambini, D; Agnely, J [Hopital Necker-Enfants-Malades, 75 - Paris (France)

    1976-03-01

    Left ventricular ejection fraction is usually measured by cineangiocardiography. When radiocardiography and cardiac chamber scanning are associated, it allows an effective left ventricular ejection fraction assessment. Ejection fractions calculated by both methods are the same in normal subjects. They are different in the case of left valvular heart disease with insufficiency. The whole regurgitation fraction can be calculated from this difference.

  3. Measurement of effective left ventricular ejection fraction by radiocardiography associated with cardiac chamber scanning

    International Nuclear Information System (INIS)

    Vernejoul, Pierre de; Fauchet, Michel; Rimbert, J.-N.; Gambini, Denis; Agnely, Jacqueline

    1976-01-01

    Left ventricular ejection fraction is usually measured by cineangiocardiography. When radiocardiography and cardiac chamber scanning are associated, it allows an effective left ventricular ejection fraction assessment. Ejection fractions calculated by both methods are the same in normal subjects. They are different in the case of left valvular heart disease with insufficiency. The whole regurgitation fraction can be calculated from this difference [fr

  4. Quantitative radiocardiography by single-probe counting using sup(99m)technetium albumin

    International Nuclear Information System (INIS)

    Man in 't Veld, A.J.; Wenting, G.J.; Verhoeven, R.P.; Schalekamp, M.A.D.H.

    1978-01-01

    Quantitative radiocardiography with sup(99m)Technetium albumin, using a single probe for percordial counting of radioactivity is a non-invasive technique to measure cardiac output. sup(99m)Technetium pertechnetate is bound to albumin by electrolytic complexation. Preparations of sup(99m)Technetium albumin showed small percentages of free radioactivity. In-vivo stability of the complex was confirmed by comparison with distribution volumes of 131 Iodine albumin and sup(113m)Indium transferrin. The isotope dilution cardiac output technique was validated by comparison with a classical indocyanine green dilution method. Results obtained by peripheral intravenous injection of the isotope were not different from those after intracardiac injection. Exact localization of the collimator over the heart was not critical. Duplicate measurements showed good reproducibility. Examples of serial measurements in patients with hyperthyroidism, primary aldosteronism and essential hypertinsion are given. The method is reliable, accurate and safe and causes no discomfort to the patient. (C.F.)

  5. Effect of smoking on the central circulation at rest and during exercise as studied by radiocardiography

    International Nuclear Information System (INIS)

    Timisjaervi, J.; Kuikka, J.; Hirvonen, L.; Kettunen, R.; Moskinen, M.; Kari-Koskinen, O.; Tuominen, M.

    1980-01-01

    The pulmonary vessels are the first target of tobacco smoke in the circulatory system, but the functional changes occuring in the pulmonary circulation are poorly understood. Hence 46 volunteers were studied by radiocardiography under the following conditions: 1. At rest before and after smoking 2 cigarettes (15 men); 2. After repeated ergometer exercise (5 min. 100 W) with and without smoking (13 men); and 3. Control experiments under the corresponding conditions without smoking (18 subjects). A significant increase occured in heart rate, cardiac output and systolic arterial blood pressure after smoking when at rest, but an almost significant decrease in pulmonary dispersion volume, whereas the heart rate and pulmonary capillary pressure attained significantly higher values after than before smoking in the exercise tests, with a significant decrease observed in stroke volume, pulmonary blood volume and pulmonary dispersion volume. It is concluded that smoking impairs physical performance increases pulmonary capillary pressure and reduces pulmonary blood volume and probably the number of open capillaries. (orig.) [de

  6. Right and Left Ventricular Volumes in Atrial Septal Defect Studied by Radiocardiography

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    Ivancevic, D. [Radioisotope Department, Internal Clinic, Rebro, Zagreb, Yugoslavia (Croatia); Vernejoul, P. de; Kellershohn, C. [CEA, Service Hospitalier Frederic Joliot, Departement de Biologie, Orsay (France)

    1971-02-15

    Radiocardiography with radioiodinated ({sup 131}I) human serum albumin and barium ({sup 137m}Ba) solution injected into the right subclavian vein has been performed in a group of 43 patients with atrial septal defect and left-to-right shunt. Data on the output and ejection index of each ventricle are essential for the estimation of the diastolic and residual volumes of the right and left ventricle. The systemic flow was therefore calculated according to Veall's formula and the pulmonary flow and the shunt How were determined using the method of de Vernejoul and co-workers. The formulas for the calculation of ventricular volumes were modified. The results show that many cases of atrial septal defect have an enlarged right ventricle whereas the left ventricle remains normal or is diminished. These changes correlate well with the amount of the shunt flow. In both ventricles the ventricular volumes show a good correlation with the stroke volumes. For the regulation of the pulmonary blood volume the right ventricle seems to be more important than the left ventricle. The operative closure of atrial septal defect (in 14 patients) has normalized the size of ventricular volumes. (author)

  7. Pulmonary artery radiocardiography and rheography in the diagnosis of hemodynamic and contractile function impairments of the right ventricle in patients with obstructive bronchitis

    International Nuclear Information System (INIS)

    Paleev, N.P.; Cherejskaya, N.K.; Tsar'kova, L.N.; Baklykova, S.N.; Novoderezhkina, L.B.; Oblovatskaya, O.G.; Dubinina, E.B.

    1990-01-01

    Radiocardiography and rheography of the pulmonary artery were used to examine impairments in hemodynamics and contractile function of the right ventricle in 40 patients with chronic obstructive bronchitis complicated with persistent hypertension. Right ventricular hemodynamic and contractile impairments were shown to be not equivalent with similar clinical and functional signs of pulmonary hypertension. This fact indicates that the use of special techiques is of practical value in the determination of right ventricular hemodynamics and myocardial contractility in patients with chronic obstructive bronchitis. Radiocardiography and rheography of the pulmonary artery are sufficiently reliable noninvasive techniques for examining the hemodynamics and contractile function of the right ventricular myocardium

  8. Quantitative Radio-Cardiography with the Digital Autofluoroscope

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    Bender, M. A.; Moussa-Mahmoud, L.; Blau, M. [Roswell Park Memorial Institute, Buffalo, NY (United States)

    1969-05-15

    The Digital Autofluoroscope was designed primarily to permit a quantitative evaluation of the rapid flow of short-lived radioisotopes through compartments within organs. To perform these studies, the instrument is operated in the dynamic mode. In this mode the patient is positioned in front of the detector, the radioactive material is administered, and the instrument automatically accumulates data in a magnetic core memory for a preset period of time varying from 30 milliseconds to 1 minute. At the end of the accumulation period, the stored information is dumped on computer-compatible digital magnetictape, the memory is cleared, and a new accumulation cycle commences. Upon completion of a study, the tape is replayed and anatomical sites identified from the images of the distribution of the radioactive material. A memory flagging system is then used to obtain quantitative information on a regional basis. Radio-cardiograms are performed following the intravenous injection of a bolus of 10 millicuries of {sup 99m}Tc, and rapid sequence recording of the cardiac inflow and outflow data is obtained at the rate of five frames per second. Upon completion of the study, the digital tape is played back and the locations of the four chambers of the heart are identified. The memory elements corresponding to each of these anatomical sites are then flagged, the data is replayed, and the inflow and outflow curves for each chamber are recorded separately. An EKG trigger device can be used to initiate every count-record cycle to permit the accumulation of data only during diastole. The resulting data is easier to interpret as changes in cardiac volume due to normal contractions are not recorded. This technique has been evaluated in 20 volunteers to establish normal values. Over 50 patients with congenital and acquired heart disease have been studied, and the following parameters evaluated: (1) cardiac output, (2) pulmonary blood transit time, (3) pulmonary blood volume, and (4) the quantitation of blood flow through abnormal shunts. (author)

  9. Radiocardiography of minimal transit times: a useful diagnostic procedure

    International Nuclear Information System (INIS)

    Schicha, H.; Vyska, K.; Becker, V.; Feinendegen, L.E.; Duesseldorf Univ., F.R. Germany)

    1975-01-01

    Contrary to mean transit times, minimal transit times are the differences between arrival times of an indicator. Arrival times in various cardiac compartments can be easily measured with radioisotopes and fast gamma cameras permitting data processing. This paper summarizes data selected from more than 1500 measurements made so far on normal individuals and patients with valvular heart disease, myocardial insufficiency, digitalis effect, atrial fibrillation, hypothyroidism, hyperthyroidism, effort-syndrome and coronary artery disease. (author)

  10. Radionuclide cardiography in medical practice

    International Nuclear Information System (INIS)

    Strangfeld, D.; Mohnike, W.; Schmidt, J.; Heine, H.; Correns, H.J.

    1986-01-01

    This publication is a compendium on all aspects of radionuclide diagnostics concerning cardiovascular system diseases. Starting with introductory remarks on the control of cardiovascular diseases the contribution of radionuclide cardiology to functional cardiovascular diagnostics as well as pathophysiological and pathobiochemical aspects of radiocardiography are outlined. Radiopharmaceuticals used in radiocardiography, physical and technical problems in application of radionuclides and their measuring techniques are discussed. In individual chapters radionuclide ventriculography, myocardial scintiscanning, circulatory diagnostics, radionuclide diagnostics of arterial hypertension, of thrombosis and in vitro diagnostics of thrombophilia are treated in the framework of clinical medicine

  11. Clinico pathologic session: case 4/2000 - heart failure in a 9-year-old child after treatment with anthracycline for Wilm's tumor

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    Mansur, Alfredo Jose [Sao Paulo Univ., SP (Brazil). Faculdade de Medicina. Instituto do Coracao] (ed.)

    2000-08-01

    The evolution of the case is studied. The patient was diagnosed with state III nephroblastoma and underwent nephrectomy, followed by chemotherapy and radiotherapy. Diagnostic examinations (electrocardiogram, chest X-ray and radiocardiography with technetium-99m labelled red blood cell) are discussed. Several differential diagnoses are reported as well as urologist's comments. Autopsy results are presented.

  12. Clinico pathologic session: case 4/2000 - heart failure in a 9-year-old child after treatment with anthracycline for Wilm's tumor

    International Nuclear Information System (INIS)

    Mansur, Alfredo Jose

    2000-01-01

    The evolution of the case is studied. The patient was diagnosed with state III nephroblastoma and underwent nephrectomy, followed by chemotherapy and radiotherapy. Diagnostic examinations (electrocardiogram, chest X-ray and radiocardiography with technetium-99m labelled red blood cell) are discussed. Several differential diagnoses are reported as well as urologist's comments. Autopsy results are presented

  13. Further contribution to the development of nuclear stethoscopic techniques

    International Nuclear Information System (INIS)

    Horvath, M.; Nemeth, L.; Kantor, E.; Kiss, J.; Bocsa, Z.; Sziberth, P.; Karman, M.

    1991-01-01

    After the introduction of radiocardiography (RCG) function analysis, the method has gradually been improved by applying scintillation probes, semiconductor detectors and computer evaluation. Miniature semiconductor detectors were fixed onto the chest, the detection efficiency and energy resolution was clarified to further improve the RCG technique. Various semiconductor devices were tested and compared. The RCG was combined with Holter monitoring and ECG. Photodiode RCG was extended to ergometric measurements. These new improvements were evaluated. (R.P.) 8 refs.; 8 figs

  14. Electronic analogue simulator of radio cardiograms; Simulateur analogique electronique de radiocardiogrammes

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    Roux, G; Lansiart, A; Vernejoul, P de; Kellershohn, C [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1967-07-01

    The various parameters of the heart pump and of the blood circulation can be determined by radio-cardio-graphical techniques. The curves thus obtained can be more easily used in radiocardiography if the electronic analogue simulator described here is employed. The experimental and simulated radio-cardiograms are made to coincide by varying the electrical parameters of the simulator. Using simple charts it is possible to obtain directly the actual original physiological parameters from these electrical parameters. Some examples are given showing the excellent accuracy obtained in the determination of ejection indices by the simulator. (authors) [French] Les differents parametres de la pompe cardiaque et de la circulation sanguine peuvent etre determines par les techniques de radiocardiographie. L'exploitation des courbes obtenues en radiocardiographie est rendue plus aisee par l'utilisation du simulateur analogique electronique presente ici. Le radiocardiogramme experimental et le radiocardiogramme simule sont superposes en agissant sur les parametre electriques du simulateur. Par l'utilisation d'abaques simples, ces parametres electriques permettent de retrouver directement les parametres reels d'origine physiologique. Quelques exemples sont donnes montrant l'excellente precision obtenue dans la determination des indices d'ejection a l'aide du simulateur. (auteurs)

  15. Nuclear stethoscope

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    Inagaki, Yoshiaki; Saito, Toshihiro; Shimizu, Masahiko (Chiba Univ. (Japan). School of Medicine)

    1983-06-01

    The nuclear stethoscope consisting of radiocardiography and data processing by a microcomputer was introduced with respect to its outline, reliability and clinical application. Ejection fractions (EF) obtained by this device showed a satisfactory correlation with values obtained by the cardiac pool multigate (MUGA) method using a scinticamera and minicomputer, with a slight tendency to overestimation. They showed a good correlation with left ventriculography, accompanied by a slight tendency to underestimation. The reproducibility of this device was also satisfactory. Clinically, EF values during exercise in ischemic heart disease were well correlated with those obtained by the MUGA method. This device permitted real time evaluation of left ventricular function and was highly reliable.

  16. Nuclear stethoscope

    International Nuclear Information System (INIS)

    Inagaki, Yoshiaki; Saito, Toshihiro; Shimizu, Masahiko

    1983-01-01

    The nuclear stethoscope consisting of radiocardiography and data processing by a microcomputer was introduced with respect to its outline, reliability and clinical application. Ejection fractions (EF) obtained by this device showed a satisfactory correlation with values obtained by the cardiac pool multigate (MUGA) method using a scinticamera and minicomputer, with a slight tendency to overestimation. They showed a good correlation with left ventriculography, accompanied by a slight tendency to underestimation. The reproducibility of this device was also satisfactory. Clinically, EF values during exercise in ischemic heart disease were well correlated with those obtained by the MUGA method. This device permitted real time evaluation of left ventricular function and was highly reliable. (Chiba, N.)

  17. Electronic analogue simulator of radio cardiograms

    International Nuclear Information System (INIS)

    Roux, G.; Lansiart, A.; Vernejoul, P. de; Kellershohn, C.

    1967-01-01

    The various parameters of the heart pump and of the blood circulation can be determined by radio-cardio-graphical techniques. The curves thus obtained can be more easily used in radiocardiography if the electronic analogue simulator described here is employed. The experimental and simulated radio-cardiograms are made to coincide by varying the electrical parameters of the simulator. Using simple charts it is possible to obtain directly the actual original physiological parameters from these electrical parameters. Some examples are given showing the excellent accuracy obtained in the determination of ejection indices by the simulator. (authors) [fr

  18. Diagnostic possibilities of radionuclide investigation in patterns with stable and unstable angina pectoris

    International Nuclear Information System (INIS)

    Ponomareva, A.G.; Zudbinov, Yu.I.; Sokolov, O.K.; Kudinov, V.I.

    1986-01-01

    Myocardial radiocardiography and scintigraphy with 99m Tc-pyrophosphate was performed in 58 patients with stable angina and 60 patients with unstable angina. In patients with stable angina, positive scintigrams were mostly recorded after anginal attacks. Their central hemodynamic parameters deteriorated progressively as angina increased in severity. Patients with unstable angina typically showed myocardial accumulation of the label that was unrelated to anginal attacks and recordable by direct-projection scintigraphy. The assessment of myocardial radiocardiographic and scintigraphic data allows one to differentiate between stable and unstable angina

  19. Assessment of function of the cardiovascular system in arterial hypertension using radionuclide methods of investigation

    International Nuclear Information System (INIS)

    Oganesyan, N.M.; Babayan, A.S.; Mikaehlyan, R.S.; Mnatsakyan, Eh.L.

    1986-01-01

    Proceeding from a study of the nature of changes in hemodynamics during development of hypertensive disease (HD) at its different stages it was shown that hemodynamic changes in 42.1% of the patients with Stage 1-2A HD were of hypertensive type, in the patients with Stage 2B-3 HD normal and hypokinetic types of the blood circulation prevailed. After bicycle ergometry exercise the reactivity of the cardiovascular system was revealed more completely. The most complete information on function of the cardiovascular system and myocardial contractility can be obtained with the help of radioangiocardiography and radionuclide ventriculography. However in the absence of a gamma-chamber radiocardiography can provide necessary information on function of the cardiovascular system in case it is used in one and the same patient over time using bicycle ergometry testing

  20. Hemodynamic pattern in myocardial infarction patients at the common stages of rehabilitation

    International Nuclear Information System (INIS)

    Perepech, N.B.

    1986-01-01

    Integrated body rheography, radiocardiography and radionuclide ventriculography were used to investigate hemodynamic changes in 101 myocardial infarction patients during the hospital stage of the disease. Changes in major hemodynamic parameters were demonstrated by the end of the 1st week and when walking was resumed. At the resumed-walking stage, the mechanism of declining stroke and cardiac indices was shown to depend on physical activation rates. Hemodynamic response is mostly conditioned by myocardial insufficiency when walking is resumed rapidly during the 2nd week, and by smaller venous return due to hypovolemia where it is resumed slowly during the 4th week. Expanding motion regimens at slow rates results in persistent hemodynamic disturbances in myocardial infarction patients

  1. Radiocardiographic determination of the stroke volume and of the heart minute volume in athletes

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    Sattler, R; Stoll, W [Friedrich-Schiller-Universitaet, Jena (German Democratic Republic). Radiologische Klinik

    1981-11-01

    Radiocardiography, a novel radioisotope method for the problemless determination of many cardiodynamic parameters which can be applied also at given physical exercise is presented. On the basis of stroke volume and heart minute volume values from 35 athletes practising different sports and of a comparison with normal values reported in the literature, differences in the cardiac adaptation and the function of athletic hearts and so-called normal hearts are pointed out. The stroke volume of endurance-trained athletes exceeds that of untrained individuals by 30-40 ml. Under exercise the increase of the stroke volume is considerably greater in endurance athletes than in individuals practising other sports or in untrained subjects. At rest the values of the heart minute volume are almost the same in athletes and untrained individuals. Under exercise the heart minute volume of endurance athletes (40 l/min) is nearly twice that of untrained individuals (volume reserve of the athlete).

  2. Radiocardiographic determination of the stroke volume and of the heart minute volume in athletes

    International Nuclear Information System (INIS)

    Sattler, R.; Stoll, W.

    1981-01-01

    Radiocardiography, a novel radioisotope method for the problemless determination of many cardiodynamic parameters which can be applied also at given physical exercise is presented. On the basis of stroke volume and heart minute volume values from 35 athletes practising different sports and of a comparison with normal values reported in the literature, differences in the cardiac adaptation and the function of athletic hearts and so-called normal hearts are pointed out. The stroke volume of endurance-trained athetes exceed that of untrained individuals by 30-40 ml. Under exercise the increase of the stroke volume is considerably greater in endurance athletes than in individuals practising other sports or in untrained subjects. At rest the values of the heart minute volume are almost the same in athletes and untrained individuals. Under exercise the heart minute volume of endurance athletes (40 l/min) is nearly twice that of untrained individuals (volume reserve of the athlete). (author)

  3. Complement, circulating immine complexes and cenral hemodynamics in patients with pulmonary tuberculosis

    International Nuclear Information System (INIS)

    Ershov, A.I.; Fedoseeva, V.N.; Mol'kov, Yu.N.; Evstaf'ev, Yu.A.; Bochkarev, E.G.; Shcheglova, V.T.

    1987-01-01

    By means of radiocardiography and radiometry central hemodynamic parameters were measured, using 131 I-labelled human serum albumin, pulmonary-artery systolic pressure (PASP) was assessed indirectly, and serum complement and circulating immune complexes (CIC) were measured before 48 hours after subcutaneous administration of 20 TU tuberculin in 65 patients with active pulmonary tuberculosis, 25 clinically-cured tuberculosis patients and 16 patients with chronic nonspecific pulmonary diseases (CNPD). A potent direct correlation was demonstrated between the CIC level and PASP elevation. It is suggested that close correlation between CIC and PASP elevation may be evidence of their pathogenetic involvement in chronic pulmonary heart, as well as the fact that prolonged and effective chemotherapy weakens adverse cardiovascular effects of immunologic factors, which can however persist in some individuals even after they are apparently cured from tuberculosis

  4. Chapter 7. Heart

    International Nuclear Information System (INIS)

    Vernejoul, P. de; Fauchet, M.; Barritault, L.

    1975-01-01

    Owing to the great technological progress of the last few years, combined with the possibility of using short-lived radioisotopes, nuclear medicine has made new strides in cardiology from both the morphological and kinetic viewpoints. Kinetic studies are described first: cardiac output measurements, radiocardiography, coronary output measurements. This is followed by a study of morphological tests: static using scintigraphic methods, then dynamic with stationary detectors. It is shown that the addition of a data processing unit to the stationary detectors allows the development of analytical methods similar to conventional kinetic tests and opens up vast possibilities for the future. For the analysis of these methods the techniques considered are as far as possible based on the external detection of radiation emitted by a radioactive tracer after simple intraveinous injection, without catheterization. In this field the use of radioisotopes in cardiology offers the means of performing simple investigations which, being harmless for the patient, incur no loss of blood and can be repeated easily and often [fr

  5. Anthracycline-induced cardiotoxicity. Changes in left ventricular function evaluated by radionuclide cardiography during and after epirubicin therapy and predictive value of the method for heart failure; Antracyclin-induceret kardiotoxicitet. Aendringer i venstre ventrikels funktion vurderet ved isotopkardiografi under og efter behandling med epirubicin, og metodens evne til at praediktere klinisk hjerteinsufficiens

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    Schaadt, Bente Krogsgaard

    1998-12-31

    Eighty-nine patients with breast cancer participated in this study of the left ventricular function determined by radionuclide cardiography before, during and after epirubicin treatment. Radiocardiography (MUGA = MUlti Gated Acquisition) was performed on patients in horizontal position after an intravenous injection of {sup 99m}Tc-labelled human serum albumin. Of these patients 67 were treated with at least 850 mg/m{sup 2} of the drug. Eight of the patients developed clinical signs of heart failure, whereas 59 did not. A fall in left ventricular ejection fraction (LVEF) was recorded during the first of the treatment period in both groups. The age was significantly higher and LVEF lower before epirubicin treatment in the group that developed heart failure, but the change in LVEF during treatment was of the same magnitude in the two groups. Whereas internationally recommended criteria for interruption of chemotherapy had low predictive values in these patients, a combination of 3 criteria: age {>=} 50 years, pre-treatment LVEF {<=} 0.60 and a fall in LVEF below 0.50 during epirubicin treatment yielded a high diagnostic value with regard to development of heart failure. The sensitivity and specificity of these criteria were 88% and 95%, respectively, and the predictive value of a positive and a negative test 70% and 98%. (au)

  6. Hemodynamics in Korean Hemorrhagic Fever

    International Nuclear Information System (INIS)

    Han, Ji Young; Lee, Jung Sang; Koh, Chang Soon; Lee, Mun Ho

    1974-01-01

    The author in an attempt to evaluate hemodynamic changes in the clinical stages of Korean hemorrhagic fever measured plasma volume, cardiac output and effective renal plasma flow utilizing radioisoto as during various phases of the disease. Cardiac output was measured by radiocardiography with external monitoring method using RIHSA. Effective renal plasma flow was obtained from blood clearance curve drawn by external monitoring after radiohippuran injection according to the method described by Razzak et al. The study was carried out in thirty-eight cases of Korean hemorrhagic fever and the following conclusions were obtained. 1) Plasma volume was increased in the patients during the oliguric and hypertensive-diuretic phases, while it was normal in the patients during the normotensive-diuretic phase. 2) Cardiac index was increased in the patients during the oliguric phase and was slightly increased in the patients at the hypertensive diuretic phase. It was normal in the other phases. 3) Total peripheral resistance was increased in the hypertensive patients during diuretic phase, while it was normal in the rest of phases. 4) Effective renal plasma flow was significantly reduced in the patients during the oliguric and diuretic phases as well as at one month after the oliguric onset. There was no significant difference between the oliguric and the early diuretic phases. Renal plasma flow in the group of patients at one month after the oliguric onset was about 45% of the normal, however, it returned to normal level at six months after the onset. 5) Clinical syndrome of relative hypervolemia was observed in some patients during the oliguric phase or hypertensive diuretic phase. Characteristic hemodynamic findings were high cardiac output and normal to relatively increased peripheral resistance these cases. Relatively increased circulating blood volumes due to decreased effective vascular space was suggested for the mechanism of relative hypervolemia. 6) Cardiac