title: The quest for the unholy grail.
authors.forename: T
authors.initials: T
authors.lastname: Kimball
mesh_terms: D001024:Aortic Valve Stenosis / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000628:therapy*; D006328:Cardiac Catheterization; D002648:Child; D015150:Echocardiography, Doppler; D006801:Humans