Atrioventricular septal defects (AVSD) are congenital heart defects that occur when the heart's septum, which separates the heart's chambers, does not form properly. This condition can lead to a ...

An ostium primum atrial septal defect (ASD) occurs when then atrial septum near the atrioventricular valves has a communication between the two atrium causing a left to right shunt. This rarely ...