PRESERVATION OF SYSTOLIC FUNCTION OF RIGHT VENTRICULAR AN IMPORTANT PREDICTOR OF CARDIAC RESYNCHRONIZATION THERAPY
The evaluation of the role of right ventricular (RV) systolic dysfunction in patients with ischemic and dilated cardiomyopathy for the selection of candidates for cardiac resynchronization therapy (CRT). To assess RV systolic function was measured systolic velocity of tricuspid valve annulus at the side of the RV free wall by tissue Doppler (TDI). The criterion of positive response to CRT (responder group) considered reverse remodeling of the left ventricle, in the form of reduced end-systolic volume CSR ≥ 15 % compared to baseline and 6 months after CRT. Using ROC- analysis was determined threshold systolic velocity of the tricuspid valve (cut off < 10 cmc), which allows you to select patients non-responder before implantation cardiac resynchronization devices with a sensitivity of 85 % and a specificity of 83 %.