Atrial septal defect

Abstract

There are commonly three main types of atrial septal defects (ASDs): ostium secundum (80%), ostium primum (10%), and sinus venosus (10%). Atrial septal defects were one of the very first congenital cardiac anomalies to be corrected by operative treatment. The secundum atrial septal defect (ASD) is the second most common form of congenital heart disease, representing at least 10% of all congenital cardiac anomalies. The median incidence of the isolated secundum atrial septal defect is at least 568 per million live births.