Tetralogy of Fallot is a pulmonary stenosis associated with high-mounted ventricular defect. The right ventricular empties into the aorta instead of into the pulmonary artery.
A ventricular septal defect is heart defect, an opening in the upper part of the interventricular septum due to nonunion of the aortic septum.
Patent ductus arteriosus occurs when the developing ductus arteriosus does not close and persists as a shunt connecting the left branch.
The most common form of an atrial septal defect is presence of ostium secundum type, while less common ostium primum type that is located lower in the septum.
Coarctation of the aorta in adults is located in the aortic arch just below the left and near the ligamentum subclaviae arteriosum. Bicuspid aortic valve occurs in 25% of cases.