[Noninvasive method of studying intracardiac and systemic hemodynamics in a mitral valve lesion by calculating the mitral regurgitation volume and mean dynamic pressure in the left atrium].

Comparative hemodynamic studies, making use of different techniques, have demonstrated that tetrapolar transthoracic rheoplethysmography is a very accurate instrument of determining effective stroke volume in cases of mitral regurgitation, and that the latter can be detected by echocardiography and rheoplethysmography. Intracardiac hemodynamic disorders can be assessed on the basis of echographic estimates of left-atrial mean dynamic pressure.