Heart Septal Defects, Atrial
Synonyms
Atrial Septal Defect
Atrial Septal Defects
Defect, Atrial Septal
Defects, Atrial Septal
Ostium Primum, Persistent
Ostium Secundum Atrial Septal Defect
Persistent Ostium Primum
Primum, Persistent Ostium
Septal Defect, Atrial
Septal Defects, Atrial
Developmental abnormalities in any portion of the ATRIAL SEPTUM resulting in abnormal communications between the two upper chambers of the heart. Classification of atrial septal defects is based on location of the communication and types of incomplete fusion of atrial septa with the ENDOCARDIAL CUSHIONS in the fetal heart. They include ostium primum, ostium secundum, sinus venosus, and coronary sinus defects.