What sort of problem is an atrio-ventricular septal defect?

VSD: Vsd is the abnormal communication through the wall separating the lower chambers (ventricles) allowing the abnormal mixing of oxygenated and un-oxygenated blood. It may occur as a birth defect or result from a heart attack. It can result in heart failure but if it's very small, no treatment may be necessary. It is correctable with surgery.

Complex ASD/VSD: Also known as an av canal, atrio-ventricular septal defectt is a type of congenital heart defect. There is a an ASD and vsd together creating a defect in the center of the heart. There is also one common av valve , rather than 2 distinct valves (mitral and tricuspid valves). It is commonly but not necessarily associated with down syndrome. Surgical repair is required in infancy.

Very serious: It is a complex defect resulting from an endocardial cushion defect resulting in a deficiency of the septum primum and an av canal type of ventricular septal defect. May have a cleft in the mitral. This results in large ammounts of blood to be shunted from the left to the right. May not be evident at birth sometimes but 2-3weeks later. Early repair life saving.