- 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