BACKGROUND	The aims of this study were to evaluate tricuspid annular plane systolic excursion ( TAPSE ) as a predictor of left ventricular ( LV ) reverse remodeling and clinical benefit of cardiac synchronization therapy ( CRT ) and to evaluate the effect of CRT on TAPSE in patients with mildly symptomatic systolic heart failure as a substudy of the REsyncronization reVErses Remodeling in Systolic left vEntricular dysfunction ( REVERSE ) trial .\