title: Echocardiography cases. Doppler, M-mode and two-dimensional echocardiography in ventricular septal defect.
mesh_terms: D003937:Diagnosis, Differential; D004452:Echocardiography / Q000379:methods; D006345:Heart Septal Defects, Ventricular / Q000175:diagnosis*; D006801:Humans; D007231:Infant, Newborn