title: Accessory mitral valve tissue causing severe left ventricular outflow tract obstruction in an adult.
abstract: Accessory mitral valve (AMV) is a rare cause of left ventricular outflow tract (LVOT) obstruction and is extremely rare in adults. We report a case of an older adult with an AMV that caused severe LVOT obstruction. A parachute-like piece of tissue (the AMV) protruding into the LVOT during systole was first detected in a 45-year-old woman by echocardiography. Because the pressure gradient and dyspnea gradually progressed, she finally underwent a successful operation for removal when she was 48 years old.
authors.affiliation: Department of Cardiology, The Heart Institute of Japan, Tokyo Women's Medical University, Tokyo, Japan. maoka@hij.twmu.ac.jp
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Aoka
authors.forename: Naoko
authors.initials: N
authors.lastname: Ishizuka
authors.forename: Yasunari
authors.initials: Y
authors.lastname: Sakomura
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Nagashima
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Kawana
authors.forename: Akihiko
authors.initials: A
authors.lastname: Kawai
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kasanuki
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D018618:Echocardiography, Doppler, Color; D017548:Echocardiography, Transesophageal; D005260:Female; D005500:Follow-Up Studies; D006330:Heart Defects, Congenital / Q000000981:diagnostic imaging / Q000601:surgery*; D006337:Heart Murmurs; D006801:Humans; D017379:Hypertrophy, Left Ventricular / Q000151:congenital / Q000000981:diagnostic imaging / Q000601:surgery; D008875:Middle Aged; D008943:Mitral Valve / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000601:surgery; D014694:Ventricular Outflow Obstruction / Q000151:congenital* / Q000000981:diagnostic imaging / Q000601:surgery