Atrial septal defect.
D001769:Blood; D001775:Blood Circulation; D018376:Cardiovascular Abnormalities; D002319:Cardiovascular System; D006321:Heart / Q000502:physiology*; D006344:Heart Septal Defects, Atrial; D006801:Humans
BLOOD; BLOOD CIRCULATION; CARDIOVASCULAR DEFECTS, CONGENITAL; HEART/physiology