title: Modified versus standard mechanical valved aortic conduit.
abstract: The aim of this study was to compare the hemodynamic characteristics and early clinical results of a commercially available standard aortic conduit with those of a modified valved composite graft, which consists of a mechanical valve prosthesis sewn into a vascular tube and placed in a supraannular position. The modified conduit was placed in 40 patients (group 1) and the standard conduit in another 40 patients (group 2). The early postoperative mortality rates (within 30 days after surgery) were 0% in group 1 and 5% (2 patients) in group 2; the difference was not statistically significant. The mean geometric orifice area of the valve prosthesis was significantly larger in group 1 than in group 2 (3.7 +/- 0.7 cm(2) versus 2.9 +/- 0.5 cm(2)). Early results showed a hemodynamic advantage of the modified conduit, with significantly lower transvalvular gradients.
authors.affiliation: Department of Cardiovascular Surgery, Cardiovascular Clinic, Herz- und Gefaess-Klinik, Salzburger Leite 1, Bad Neustadt 97616, Germany. p.urbanski@herzchirurgie.de
authors.forename: Paul P
authors.initials: PP
authors.lastname: Urbanski
authors.forename: Witold
authors.initials: W
authors.lastname: Dinstak
authors.forename: Stefan
authors.initials: S
authors.lastname: Frank
authors.forename: Alexander
authors.initials: A
authors.lastname: Siebel
authors.forename: Robert W
authors.initials: RW
authors.lastname: Hacker
mesh_terms: D000328:Adult; D000368:Aged; D001011:Aorta / Q000503:physiopathology / Q000601:surgery*; D001018:Aortic Diseases / Q000503:physiopathology / Q000601:surgery*; D001021:Aortic Valve / Q000503:physiopathology / Q000601:surgery*; D001807:Blood Vessel Prosthesis; D005260:Female; D006350:Heart Valve Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D012189:Retrospective Studies; D016896:Treatment Outcome