A<unk>  (or<unk>  is a<unk>  in the ventricular septum (the wall dividing the left and right ventricles of the heart). The ventricular septum consists of a muscular (inferior) and membranous portion (superior). The membranous portion (which is close to the atrioventricular node) is most commonly affected.
Congential<unk> s are collectively the most common congenital heart<unk> . The incidence of<unk>  in adulthood has decreased over past decades due to successful surgical closure of large<unk> s.
Ventricular septal defect
Atrioventricular canal defect
Atrioventricular septal defect
Atrial septal defect
Tricuspid atresia
Persistent truncus arteriosus
Endocardial cushion defect
Aortic arch anomalies