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Asian Cardiovasc Thorac Ann 2005;13:53-57
© 2005 Asia Publishing EXchange Ltd

ORIGINAL CONTRIBUTION

Modified versus Standard Mechanical Valved Aortic Conduit

Paul P Urbanski, MD, Witold Dinstak, MD, Stefan Frank, MD, Alexander Siebel, MD, Robert W Hacker, MD

Department of Cardiovascular Surgery, Cardiovascular Clinic, Bad Neustadt, Germany

For reprint information contact: Paul P Urbanski, MD Tel: 49 97 7166 2416 Fax: 49 97 7165 1219 Email: p.urbanski{at}herzchirurgie.de, Herz- und Gefaess-Klinik, Salzburger Leite 1, Bad Neustadt 97616, Germany.

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 cm2 versus 2.9 ± 0.5 cm2). Early results showed a hemodynamic advantage of the modified conduit, with significantly lower transvalvular gradients.




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