<unk>  <unk> , previously known as "common<unk>  canal" (CAVC) or "endocardial cushion defect", is a congenital heart defect characterized by the deficiency in development of the<unk>  septum of the heart. It is caused by an abnormal fusion of the superior and inferior endocardial cushions with the mid-portion of the atrial septum and the muscular portion of the ventricular septum. The malformation results in a hole in the heart between the mitral and triscupid valves. This lack of separation can cause hemodynamic complications.
Atrioventricular septal defect
Atrioventricular canal defect
Atrial septal defect
Ventricular septal defect
Persistent truncus arteriosus
Tricuspid atresia
Accessory auricle
Patent ductus arteriosus 