LONG-TERM EFFECTS OF RIGHT VENTRICULAR PACING ON LEFT VENTRICULAR SYSTOLIC AND DIASTOLIC FUNCTION AND SYNCHRONY BY STRAIN IMAGING IN PATIENTS WITH NORMAL BASELINE LEFT VENTRICULAR EJECTION FRACTION

Background: 2D strain can assess myocardial function & synchrony & has not bee evaluated in chronic right ventricular (RV) pacing. Methods: 117 pts implanted with dual chamber pacemaker b/w 2006-2016 & LVEF>50% were enrolled. Echo data at 2-yrs (3.30 ± 1.19 yrs)