title: Atrial spetal defect (a study of twelve operated cases).
mesh_terms: D000328:Adult; D002648:Child; D004562:Electrocardiography; D005260:Female; D006344:Heart Septal Defects, Atrial / Q000145:classification / Q000196:embryology / Q000601:surgery*; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D010701:Phonocardiography