title: Development of severe stenosis in a previously purely regurgitant, congenitally bicuspid aortic valve.
authors.affiliation: Pathology Branch, National Heart, Lung, and Blood Institute, Bethesda, Maryland 20892.
authors.forename: J M
authors.initials: JM
authors.lastname: Kalan
authors.forename: C L
authors.initials: CL
authors.lastname: McIntosh
authors.forename: R O
authors.initials: RO
authors.lastname: Bonow
authors.forename: W C
authors.initials: WC
authors.lastname: Roberts
mesh_terms: D000368:Aged; D001021:Aortic Valve / Q000002:abnormalities*; D001022:Aortic Valve Insufficiency / Q000150:complications*; D001024:Aortic Valve Stenosis / Q000209:etiology*; D006801:Humans; D008297:Male