AcT, acceleration time; ED, end-diastolic; ES, end-systolic; IVC, inferior vena cava; PA, pulmonary artery; RA, right atrial; Rec, recovery; RV, right ventricular; RVOT, right ventricular outflow tract; TAPSE, tricuspid annular plane excursion; TDI, tissue Doppler imaging; TRV, trans-tricuspid valve regurgitation velocity; VTI, velocity time integral.