Note: Data given as mean ± SD.
Abbreviations: FHR: fetal heart rate; IVSd: Interventricular septum diastolic thickness; LVEDD: left ventricular end-diastolic dimension;RVEDD: right ventricular end-diastolic dimension;MAPSE: mitral annular plane systolic excursion; TAPSE:tricuspid annular plane systolic excursion; PWD: pulsed wave doppler; E: peak early ventricular filling wave velocity,A: maximum active atrial filling wave velocity; E DT:E wave deceleration time(msn); AV, PV: max peak velocity of aortic and pulmonary valves TDI: Tissue doppler imaging;LV: left ventricle ; RV: right ventricleSm: maximal systolic myocardial velocity,Em , Am : early and late diastolic myocardial velocities; IVRT: isovolumic relaxation time; IVCT: isovolumic contraction time; ET: ejection time MPI: myocardial performance index;