Subaortic stenosis.
D006328:Cardiac Catheterization; D002312:Cardiomyopathy, Hypertrophic / Q000151:congenital / Q000175:diagnosis / Q000209:etiology / Q000601:surgery*; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007231:Infant, Newborn; D008722:Methods