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 ...
PULMONARY hypertension is a serious and relatively frequent complication of the ostiumsecundum type of defect of the atrial septum. 1–4 It increases the symptoms and disability of cardio ...