
Keywords: تصویربرداری پیگیری دقیق; Fetal echocardiography; Fetal heart; Myocardial performance index; Perinatal loading conditions; Speckle-tracking; Tissue Doppler imaging; 2D; Two-dimensional; AVV; Atrioventricular valve; CO; Cardiac output; CSA; Cross-sectional area; ECG; Electrocardiog