title: The O'Brien-Angell stentless porcine valve: early results with 150 implants.
abstract: From August 1991 to June 1994, 150 patients underwent aortic valve replacement with the O'Brien-Angell stentless porcine xenograft (Bravo Cardiovascular Model 300, Cryolife, Atlanta, GA). To establish trends we analyzed three consecutive groups of 50 patients. We found significant differences in low postoperative gradients (mean < or = 10 mm Hg): 24% in group 1, 42% in group 2, and 96% in group 3. Comparing groups 1 and 3, gradients were significantly lower in all valve sizes. The difference is credited to better supraannular positioning of the valve, which is the key to the learning curve. Trivial central regurgitation was present in the three groups at 6%, 12%, and 0%, respectively. Peripheral regurgitation was trivial in 6%, 8%, and 0%, and mild to moderate in 4%, 2% and 0%, respectively. Seventy-eight of 107 patients with an available follow-up exceeding 1 year had noninvasive controls. Two early cases with moderate perivalvular leaks evolved to moderately severe leaks. Two valves were explanted. The O'Brien-Angell stentless valve is easy to handle and correct supraannular positioning provides excellent hemodynamic results.
authors.affiliation: Department of Cardiac Surgery, Hopital Bichat, Paris, France.
authors.forename: U
authors.initials: U
authors.lastname: Hvass
authors.forename: D
authors.initials: D
authors.lastname: Chatel
authors.forename: P
authors.initials: P
authors.lastname: Assayag
authors.forename: M
authors.initials: M
authors.lastname: Ouroudji
authors.forename: Y
authors.initials: Y
authors.lastname: Pansard
authors.forename: C
authors.initials: C
authors.lastname: Lenormand
authors.forename: T
authors.initials: T
authors.lastname: Laperche
authors.forename: J P
authors.initials: JP
authors.lastname: Depoix
mesh_terms: D000328:Adult; D000368:Aged; D001021:Aortic Valve / Q000601:surgery*; D001022:Aortic Valve Insufficiency / Q000209:etiology / Q000503:physiopathology / Q000601:surgery; D001024:Aortic Valve Stenosis / Q000503:physiopathology / Q000601:surgery; D001705:Bioprosthesis / Q000009:adverse effects; D006350:Heart Valve Prosthesis / Q000009:adverse effects; D006439:Hemodynamics; D006801:Humans; D008722:Methods; D008875:Middle Aged; D011183:Postoperative Complications; D012086:Reoperation