title: Ventricular septal defect. An auscultatory and phonocardiographic study of fifty cases.
mesh_terms: D006343:Heart Septal Defects; D006345:Heart Septal Defects, Ventricular; D006346:Heart Septum / Q000002:abnormalities*; D006347:Heart Sounds
keywords: HEART SEPTUM/abnormalities; HEART SOUNDS