title: Dysfunction of an ATS valve in the aortic position: the first reported case caused by pannus formation.
abstract: A 64-year-old woman underwent aortic valve replacement with a 21-mm Advancing The Standard (ATS) open-pivot mechanical heart valve for bicuspid aortic valve stenosis. In addition to the appearance of a new cardiac murmur, echocardiography performed 3 years after surgery showed a high pressure gradient across the ATS valve and a reduction in the valve orifice area. Cineradiography of the valve revealed restricted leaflet opening. Subsequent multidetector-row computed tomography clearly demonstrated pannus overgrowth on the inflow aspect of the ATS valve. During a repeat operation, subvalvular overgrown pannus was confirmed and the ATS valve was replaced with a bioprosthetic valve. This is the first reported case of prosthetic valve dysfunction resulting from pannus formation in a patient with an ATS valve in the aortic position.
authors.affiliation: Department of Surgery, Kurume University School of Medicine, 67 Asahi-machi, Kurume, Fukuoka 830-0011, Japan. tesshi@med.kurume-u.ac.jp
authors.forename: Hideki
authors.initials: H
authors.lastname: Teshima
authors.forename: Shigeaki
authors.initials: S
authors.lastname: Aoyagi
authors.forename: Nobuhiko
authors.initials: N
authors.lastname: Hayashida
authors.forename: Takahiro
authors.initials: T
authors.lastname: Shojima
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Takagi
authors.forename: Kouichi
authors.initials: K
authors.lastname: Arinaga
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Yoshikawa
mesh_terms: D001024:Aortic Valve Stenosis / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation / Q000295:instrumentation*; D006801:Humans; D008875:Middle Aged; D011475:Prosthesis Failure; D012086:Reoperation; D014057:Tomography, X-Ray Computed; D014694:Ventricular Outflow Obstruction / Q000000981:diagnostic imaging / Q000209:etiology / Q000601:surgery