RV: right ventricle, TTAD: tissue tricuspid annular displacement, L: lateral; M: medial; MP: midpoint: MP%: midpoint percentage, SVi: stroke volume indexed to body surface area; COPi: cardiac output indexed to body surface area; TAPSE: tricuspid annular systolic excursion; FAC: fractional area of change; E/A: ratio of early to late peak diastolic velocity across the mitral valve; E/e’: ratio of transmitral early diastolic peak velocity to early mitral annular peak diastolic velocity; PEC: pre-eclampsia