An atrial septal defect of the secundum type is relatively common and occurs from failure of the septum secundum to develop. This results in a communication between the left and right atrium ...
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 ...
A diastolic murmur may be heard due to relative tricuspid ... [13] For the most frequent defect, the secundum ASD, percutaneous closure minimizes hospital stay and recovery time, avoids surgical ...