tetralogy of Fallot

The group of heart defects present at birth includes a ventricular septal defect, obstruction to blood flow out of the right ventricle to the lungs, and an aorta that is shifted to the right. Enlargement of the right ventricle occurs as the right ventricle copes with obstruction of blood flow. Fetal tetralogy of Fallot is diagnosed by ultrasound before birth so that special preparations can be made for optimal care at delivery.