title: Visualization of ventricular septal defects by cardiac ultrasonography.
mesh_terms: D002648:Child; D002675:Child, Preschool; D004452:Echocardiography; D004562:Electrocardiography; D006345:Heart Septal Defects, Ventricular / Q000145:classification / Q000175:diagnosis*; D006801:Humans; D007223:Infant; D008297:Male; D008722:Methods; D014463:Ultrasonography