[PECULIARITIES OF ROTATIONAL MOTION OF LEFT VENTRICULAR WALLS IN PATIENTS ON MITRAL VALVE INSUFFICIENCY].

The peculiarities of rotational motion of left ventricular (LV) walls in patients on mitral valve insufficiency (MVI) were studied. In normal heart and MVI the rotation of basal and apical portions of the LV occurs in inter-reverse directions: the basal portion rotates clockwise and apical portion rotates counterclockwise. In patients with MVI the increase of the LV volumes is accompanied by compensatory rise of LV myocardium torsion up to (23.7 ± 5.0)degrees. The increase of indices of LV myocardium torsion in MVI occurs due to basal portions of the heart only. This is a compensatory factor in preserving of normal cardiac output for a long period of time in such disease.