The origin of an immediate diastolic murmur in atrioventricular defects.
D000293:Adolescent; D000328:Adult; D006328:Cardiac Catheterization; D002648:Child; D002675:Child, Preschool; D006344:Heart Septal Defects, Atrial / Q000150:complications*; D006801:Humans; D008875:Middle Aged; D010701:Phonocardiography