[Certain problems of study of cardiohemodynamics by the method of ultrasonic Doppler-echolocation]. / Nekotorye voprosy issledovaniia kardiogemodinamiki metodom ul'trazvukovoi Doppler-ekholokatsii

Results obtained in experiments on 10 adult mongrel dogs are offered. A synchronous registration of ultrasonic doppler-cardiograms (USDC) and of the intraventricular pressure continued throughout the experiment helped establish the relation between the pressure range in the left ventricle and the acceleration on the USDC curve. On the ground of the dependence thus obtained 2 indexes are proposed, viz. for an indirect evaluation of the intraventricular pressure (the index of "rated acceleration") and for appraising the contractability or the muyo cardium (the index of "relaxation from acceleration"). The available data might in the future provide for the possibility of devising appliances supplementing and replacing the catheterization.