Fetal echocardiography
FE was done for the referred cases to detect any structural or rhythm
abnormalities in the fetal heart according to the guidelines and
standards of the American Society of Echocardiography for performance of
fetal echocardiogram [17] using GE Voluson E6 high-end 4DOB/GYN
ultrasound machine and transducer probe with a frequency range of 5–8
MHz, EPIQ CV X made by Philips with transducer 8 MHz. A standard
two-dimensional (2D), color flow (CF), Doppler echocardiography
examinations were done. Views included four chamber, five chamber, long
axis (left and right ventricular outflow), 3 -vessel and tracheal,
ductal, and aortic arch views.