This patient clearly has an AV canal defect with a large primum atrial septal defect. A large communication is seen between the atria. Note that the basal interventricular septum is also missing ...

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 ...

The most common is a secundum ASD, which is in the middle of the wall between the atria. Then, there’s primium ASD, also known as ostium primum defect or partial atrioventricular septal defect.

Cardiac examination at 14 weeks revealed a grade 3/6 slightly harsh systolic ejection murmur and echocardiograms revealed a complete AV canal, consisting of a large ostium primum atrial septal ...

In patients with atrioventricular septal defect (AVSD), the occurrence of nonsurgical AV block has been reported. We have looked for an explanation in the development of the AV conduction system.

Secundum atrial septum defect. Primum atrial septal defect. Complete AV canal with large primum atrial septal defect and aneurysmatic transformation of the ventricular septal defect.