title: Symptomatic atrial septal defect in infancy.
mesh_terms: D000790:Angiocardiography; D006328:Cardiac Catheterization; D003937:Diagnosis, Differential; D006326:Heart Auscultation; D006333:Heart Failure / Q000175:diagnosis / Q000209:etiology*; D006344:Heart Septal Defects, Atrial / Q000150:complications / Q000175:diagnosis*; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D011651:Pulmonary Artery; D014655:Vascular Resistance