DYNAMICS OF THE MECHANICAL FUNCTION OF THE LEFT ATRIUM IN PATIENTS WITH ISCHEMIC MITRAL VALVE REGURGITATION.

Aim - to assess the left atrium (LA) mechanical function in patients with ischemic mitral regurgitation (IMR) using technologies of vector analysis of endocardium movement rate. The study enrolled 107 patients aged 56±7,5 among which 96 men (89,7%). The entry criteria: I-III degree of ischemic mitral regurgitation on echocardiography, angiography reveling coronary artery disease requiring surgical revascularization, sinus rhythm with the heart rate ranging from 60 to 89 per minute, superior echocardiography visualization of LA endocardium. We hypothesize that atrial changes in deformation and deformation rate can be associated with severity of regurgitation. The scientific study is prospective and cohort non-randomized study. Values of left atrium mechanical function decline proportionally to IMR severity. Longitudinal deformation and LA deformation rate reflect link with IMR greater than conventional indices used for estimation of LA geometry.