Left ventricular outflow tract obstruction owing to accessory endocardial cushion tissue.
D001020:Aortic Stenosis, Subvalvular / Q000175:diagnosis / Q000209:etiology / Q000601:surgery*; D006328:Cardiac Catheterization; D002312:Cardiomyopathy, Hypertrophic / Q000601:surgery*; D002648:Child; D002675:Child, Preschool; D004452:Echocardiography; D004562:Electrocardiography; D005260:Female; D006330:Heart Defects, Congenital / Q000473:pathology; D006337:Heart Murmurs; D006343:Heart Septal Defects; D006345:Heart Septal Defects, Ventricular / Q000150:complications; D006352:Heart Ventricles / Q000000981:diagnostic imaging; D006801:Humans; D007223:Infant; D011859:Radiography