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Volume 41, Issue 5
Displaying 1-6 of 6 articles from this issue
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MASAHIKO KINOSHITA, REIZO KUSUKAWA1977 Volume 41 Issue 5 Pages 489-500
Published: June 20, 1977
Released on J-STAGE: April 14, 2008
JOURNAL FREE ACCESSLeft ventricular volumes were determined by means of ECG-gated RI angio-cardiography, which were compared with volumes derived from contrast cineangiocardiography in 25 patients with various heart disease. There was a close correlation of end-diastolic and end-systolic volumes and ejection fraction between RI and contrast angiocardiography, although stroke volume yielded rather scattered values. In 46 of 52 patients with myocard infarction left ventricular asynergy was demonstrated with our method. Mean velocity of circumferential fiber shortening (mVcf) was exaggerated in patients with apical asynergy. mVcf derived from direct axis measurement yielded a higher value than that from area-length method. Left ventricular volume curve was constructed to obtain normalized systolic ejection rate during initial 100-200 msec after the start of ventricular depolarization. This index was in parallel to ejection fraction in every patient except in moderately severe hypertensive patients. End-diastolic compliance was calculated from Gaasch formula by obtaining pulmonary artery wedge pressure and end-diastolic volume, which was determined by injecting 99mTC pertechnetate into pulmonary artery through Swan-Ganz catheter. This way of access to patients with acute myocard infarction was most useful to evaluate the mechanism of elevated left ventricular end-diastolic pressure.View full abstractDownload PDF (1132K) -
KIYOSHI MACHII, TSUTOMU TAMURA, TAKASHI NATSUME, TOHRU UMEDA1977 Volume 41 Issue 5 Pages 501-505
Published: June 20, 1977
Released on J-STAGE: April 14, 2008
JOURNAL FREE ACCESSMajor and minor axes of the left ventricle were measured by single beam echocardiography in ten cardiac patients and the measurements and calculated volumes by formula V=π/6D2L were compared with the angiocardiographic estimates. There was a favorable correlation between echocardiographic and angiocardiographic major axis demention (r=0.79), left end-diastolic volume (r=0.96), and ejection fraction (r=0.81). On the contrary, left end-diastolic volume calculated by formula V=D3 was less correlated with angiocardiographic estimates (r=0.93) and the former had a tendency to overestimate the volumes where D exceeded 6.5 cm. these data indicate that in cases with markedly enlarged left ventricle, the use formula V=π/6D2L is a more accurate predictor of volumes than formula V=D3.View full abstractDownload PDF (816K) -
AKINA HIRAKAWA, MUNEYASU SAITO, SEIICHIRO MOTOHARA, TADASHI MATSUMURA, ...1977 Volume 41 Issue 5 Pages 507-514
Published: June 20, 1977
Released on J-STAGE: April 14, 2008
JOURNAL FREE ACCESS(1) ECG-gated RCG were performed in 127 cases, among them 30 were normal controls, 35 were hypertensives, 16 were ischemic heart diseases, 8 were cardiomyopathies and the rest of 38 cases were of miscellaneous cardiac diseases. (2) ECG-gated RCG were performed consecutively after the preceding RCG. Parameters calculated from RCG and ECG-gated RCG were evaluated together in terms of the sensitivity to discriminate the ischemic heart diseases from the control subjects. Among those parameters evaluated, peak diastolic dV/dt was the most sensitive index to discriminate the ischemic heart group from the control group. PDdV/dt of 20 ml/100 msec/m2 was considered to be a borderline between two groups. (3) Principal component analysis of 12 variables in 127 cases demonstrated that the peak diastolic dV/dt was closely correlated with the cardiac pump function, but was also well related to the ischemic heart factor. (4) ECG-gated RCG following the preceding RCG is a sensitive method to discriminate the ischemic heart disease from the control group.View full abstractDownload PDF (820K) -
HIROHIDE MATSUO, AKIRA KITABATAKE, TOHRU HAYASHI, MASATO ASAO, YUSUKE ...1977 Volume 41 Issue 5 Pages 515-528
Published: June 20, 1977
Released on J-STAGE: April 14, 2008
JOURNAL FREE ACCESS1) Intracardiac flows were investigated by bi-directional pulsed Doppler technique with a combined use of the two-dimensional echo-cardiography. The flow at sampling sites in the heart and great vessels were correctly identified on the two-dimensional echocardiograms. 2) Soudspectrographic analysis of the flow Doppler signals was useful in obtaining information about flow modes and in differentiating flow signals from those of valves. 3) In healthy subjects, intracardiac flow revealed a laminar mode. As a matter of interest, a flow toward the aorta, which is a cranially turned flow, was found at the center and at the outflow tract of the left ventricle from mid to late diastole. 4) In mitral stenosis, the central stream at the stenotic portion exhibited an almost laminar and rapid flow. A good coincidence in flow mode was observed between clinical cases of mitral stenosis and experimental stenosis. 5) Disturbed flows were observed in the following diseased conditions. The diastolic regurgitant flow in the left ventricular outflow tract and mitral inflow in aortic regurgitation, the regurgitant flow into the left atrium and the diastolic mitral inflow in mitral regurgitation, the ejection flow in hypertrophic cardiomyopathy with outflow tract obstruction, and the tricuspid inflow in atrial septal defect. 6) Mechanisms of intracardiac flow dynamics were also discussed.View full abstractDownload PDF (3336K) -
RYUICHI KIKAWADA, CHUJI NORO1977 Volume 41 Issue 5 Pages 529-536
Published: June 20, 1977
Released on J-STAGE: April 14, 2008
JOURNAL FREE ACCESSStudies were performed to assess clinical applicability and usefullness of several non-invasive indices of myocardial contractility, especially, ET/PEP, Pd/ICT and (Pd/ICT)/(AO/EO). In dogs preload, afterload or myocardial contractility was altered by durgs. The ET/PEP was influenced by preload as well as afterload and Pd/ICT by after load, respectively. A correction of Pd/ICT with preload, (Pd/ICT)/(AO/EO) showed a satisfactory correlation to Vmax even when the preload and/or afterload were altered. In clinical cases, ET/PEP, Pd/ICT and (Pd/ICT)/(AO/EO) all changed following administration of positive inotropic substances. Moreover, in azotemic cases with primary change in preload the gradient of the Frank-Sterling's curve increased progressively and the entire curve was located upwards with increase of (Pd/ICT)/(AO/EO) value. In case of high-resistance type hypertension, nevertheless, (Pd/ICT)/(AO/EO) showed a tendency to change in association with alteration of its constituent factor Pd. Since three exists no absolutely perfect non-invasive index of myocardial contractility available for clinical application as yet, it would be appropriate to make overall evaluation of myocardial contractility by combined use of several indices, with underlying pathological conditions and characteristics of individual parameters taken into consideration.View full abstractDownload PDF (744K) -
[in Japanese], [in Japanese]1977 Volume 41 Issue 5 Pages 541-554
Published: June 20, 1977
Released on J-STAGE: April 14, 2008
JOURNAL FREE ACCESSDownload PDF (10620K)
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