Tsuneo Yoshida

Analysis of heart motion with ultrasonic Doppler method and its clinical application

Abstract 1. 1. The ultrasonic Doppler method has been used to obtain information on the movements of the heart. 2. 2. The time of development of valvular movements is determined; a wide range of variation under various conditions is shown. 3. 3. In cases of coronary sclerosis, hypertension, etc., the opening of the mitral valve is delayed, revealing a prolonged duration of isometric relaxation. The abnormalities develop prior to myocardial change in the ECG. 4. 4. In cases of mitral stenosis the closing of the mitral valve is delayed and the opening is quickened, showing the shortening of isometric relaxation. 5. 5. In cases of mitral valvular disease with auricular fibrillation the shorter the preceding R-R, the more delayed is the closing of the mitral valve. 6. 6. Prolonged isometric relaxation develops even in cases of nephritis, hypothyroidism, liver disease, etc. 7. 7. The time relationship between the opening of the mitral valve, the closing of the semilunar valves, and the end of the T wave is referable to the following modes: (a) a delayed opening of the mitral valve; (b) early development of the opening of the mitral valve; (c) early development of the closing of the semilunar valves (Hegglin syndrome); (d) coexistence of (a) and (c); (e) early development of the opening of the mitral valve subsequent to early development of the closing of the semilunar valves in cases of marked Hegglin syndrome.