title: Aortic prosthesis re-replacement due to concealed stenosing subvalvular pannus ring.
abstract: In a patient with mechanical aortic valve prosthesis, a high transvalvular gradient was detected 16 years following the procedure, without echocardiographic clues for the underlying etiology. Intraoperatively, a stenosing pannus ring was found and excised. This pathological entity should be considered in cases of unclear transprosthetic gradient and early operation should be encouraged in symptomatic patients.
authors.affiliation: Division of Thoracic and Cardiovascular Surgery, Hannover Medical School, Hannover, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Emmert
authors.forename: T
authors.initials: T
authors.lastname: Kofidis
authors.forename: V
authors.initials: V
authors.lastname: Didilis
authors.forename: A
authors.initials: A
authors.lastname: Haverich
authors.forename: U
authors.initials: U
authors.lastname: Klima
mesh_terms: D001024:Aortic Valve Stenosis / Q000601:surgery*; D001807:Blood Vessel Prosthesis; D019917:Blood Vessel Prosthesis Implantation / Q000379:methods*; D018450:Disease Progression; D005260:Female; D006801:Humans; D008875:Middle Aged; D011474:Prosthesis Design; D012086:Reoperation