[Normal intracardiac flow in middle-aged subjects based on Doppler echocardiographic data].

Doppler's echocardiography was employed in 25 healthy persons aged 26 to 38 years to establish that normal flows from the atrioventricular valves (two-peak and diastolic ones) are directed towards the monitor. The first peak (of early filling) shows on the synchronously recorded electrocardiogram a certain period after the T wave occurrence, whereas the second one (of later filling) after the P wave. The flow from the tricuspid valve varied with respiration. In 8 persons (32%), the systolic turbulent flow was recorded in the ostium of the tricuspid valve and in one person, in the ostium of the mitral valve. The velocity of the flows did not exceed 2 m/s. The flows via the main vessels (aorta and pulmonary artery) were of one peak and systolic. The spectrum of the aortal flow was more pointed and reached the maximum velocity more rapidly. In the efferent tract of the left ventricle, no reverse diastolic flow was obtained, whereas in the efferent tract of the right ventricle, it could be obtained in 15 persons (60%). The velocity of the flow did not exceed 1 m/s. The maximum and integral velocities of the flow via the mitral valve exceeded those of the flow via the tricuspid valve. Besides, the flows were different as regards the magnitude of the mean acceleration and the mean deceleration of the early filling of the ventricles. The velocities of the flow in the aorta exceeded those of the pulmonary flow. The phase of the pulmonary flow acceleration accounted for 40.7% of expulsion, that of the aortal flow only for 29%. (ABSTRACT TRUNCATED AT 250 WORDS)