title: Discrete subaortic stenosis and balloon dilation: the four questions revisited.
authors.forename: S B
authors.initials: SB
authors.lastname: Ritter
mesh_terms: D000293:Adolescent; D000328:Adult; D000800:Angioplasty, Balloon; D001024:Aortic Valve Stenosis / Q000628:therapy*; D002648:Child; D002675:Child, Preschool; D005500:Follow-Up Studies; D006801:Humans; D012008:Recurrence