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Right ventricular fractional area change (RVFAC) is more strongly associated with pulmonary vascular resistance (PVR) than tricuspid annular plane systolic excursion (TAPSE) or S’. A, There is a significant inverse relation between RVFAC and PVR (r=−0.31, P=0.003). B, TAPSE is inversely associated with PVR (r=−0.22, P=0.027). C, S’ and PVR are not significantly related (r=−0.16, P=0.18). WU indicates Wood units.
