Cardiac axis shift within the cardiac cycle of normal fetuses and fetuses with congenital heart defect.

OBJECTIVES To investigate changes in the cardiac axis (CAx) within the cardiac cycle of normal fetuses and fetuses with congenital heart defects (CHD). METHODS This was a retrospective case-control study in which stored videoclips of four-chamber views from 527 prenatal ultrasound examinations performed at 18 + 0 to 36 + 6 weeks of gestation were reviewed… (More)