Fixed membranous subaortic stenosis.
D001020:Aortic Stenosis, Subvalvular / Q000175:diagnosis*; D006328:Cardiac Catheterization; D002312:Cardiomyopathy, Hypertrophic / Q000175:diagnosis*; D002648:Child; D004452:Echocardiography; D006337:Heart Murmurs; D006801:Humans