title: The second heart sound in secundum atrial septal defect a phonocardiographic study with haemodynamic correlations.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006344:Heart Septal Defects, Atrial / Q000175:diagnosis* / Q000503:physiopathology; D006439:Hemodynamics; D006801:Humans; D008297:Male; D010701:Phonocardiography; D011652:Pulmonary Circulation