title: When is the supravalvar mitral ring truly supravalvar?
authors.forename: Robert H
authors.initials: RH
authors.lastname: Anderson
mesh_terms: D001024:Aortic Valve Stenosis / Q000151:congenital* / Q000000981:diagnostic imaging; D004452:Echocardiography; D006330:Heart Defects, Congenital / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D008943:Mitral Valve / Q000002:abnormalities* / Q000000981:diagnostic imaging; D008946:Mitral Valve Stenosis / Q000151:congenital* / Q000000981:diagnostic imaging