title: The importance of intracardiac phonocardiography for the differential diagnosis of ventricular septal defect and ductus arteriosus apertus in pulmonary hypertension in infancy.
mesh_terms: D006328:Cardiac Catheterization; D002306:Cardiac Volume; D003937:Diagnosis, Differential; D004374:Ductus Arteriosus, Patent / Q000175:diagnosis*; D006345:Heart Septal Defects, Ventricular / Q000175:diagnosis*; D006801:Humans; D006976:Hypertension, Pulmonary / Q000175:diagnosis* / Q000209:etiology; D007223:Infant; D007231:Infant, Newborn; D009200:Myocardial Contraction; D010701:Phonocardiography