title: The mechanism of splitting of the second heart sound in atrial septal defect.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001281:Atrial Fibrillation / Q000150:complications; D001794:Blood Pressure; D005260:Female; D006326:Heart Auscultation; D006344:Heart Septal Defects, Atrial / Q000175:diagnosis*; D006347:Heart Sounds; D006801:Humans; D006976:Hypertension, Pulmonary / Q000150:complications; D008297:Male; D008875:Middle Aged