Atrial septal defect as it appears in patients over the age of forty.
D006344:Heart Septal Defects, Atrial; D006801:Humans
Br Heart J. 1956 Apr;18(2):209-25
13315850
Am Heart J. 1950 Jul;40(1):154-61
15425457
Br Heart J. 1950 Jul;12(3):277-92
15426690