Multivariate regression analysis for predictors of right ventricular ejection fraction.

mRAP, mean right atrial pressure; mPAP, mean pulmonary arterial pressure; PVR, pulmonary vascular resistance; IVA, right ventricular isovolumic acceleration; RVETD/LVETD, ratio of right ventricular transverse diameter to left ventricular transverse diameter; TAPSE, tricuspid annual plane systolic excursion; S’, tricuspid annular systolic excursion velocity; RVFAC, right ventricular fraction area change; RVMPI, right ventricular myocardial performance index.