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Three years' experience with the sorin pericarbon stentless prosthesis: mid-term results with three different
Zsolt L Nagy1, Annamaria Bodi, Andras Len
1Institute of Cardiology and Cardiac Surgery, University of Debrecen, Hungary. zsoltlnagy@hotmail.com
Background And Aim Of The Study:
Sorin Pericarbon stentless pericardial valves were implanted using three different surgical techniques, and early and mid-term clinical and hemodynamic results were analyzed according to the method used.
Methods:
Between January 2000 and December 2002, 102 Pericarbon stentless valves were implanted in 101 patients (55 females, 46 males; mean age 67.6+/-7.1 years). Among these patients, 63 had isolated aortic valve replacement and 39 underwent a combined procedure. The inflow portion of a matching-size prosthesis was fixed to the aortic annulus either by semi-continuous Prolene suture (n = 48), interrupted simple Ethibond (n = 29) or interrupted Ethibond mattress stitches (n = 25). Valve sizes were not significantly different in the three subgroups. The aortic cross-clamp and cardiopulmonary bypass times were 145+/-31 min and 171+/-39 min, respectively, with interrupted stitches; these times were significantly longer than in the continuous suture group (115+/-27 min and 143+/-45 min) or with interrupted mattress stitches (111+/-28 min and 137+/-34 min).
Results:
Early mortality was 6.8% (n = 7) for the entire patient group. None of the deaths was valve-related. Postoperatively, all patients were followed up (mean 26.6+/-9.4 months). There were two late deaths (both non-valve-related). One patient developed early endocarditis, and the infected valve was re-replaced with another Pericarbon stentless valve. During the follow up period the mean and peak transvalvular gradient was decreased from 12.8+/-8.5 mmHg to 9.1+/-2.3 mmHg and from 22.5+/-13.9 mmHg to 16.1+/-4.3 mmHg respectively, and left ventricular wall thickness from 15.5+/-2.1 mm to 12.8+/-1.4 mm. Regurgitation was not more than trivial for any of the implanted valves. The implantation technique did not significantly affect the hemodynamic performance of the Pericarbon stentless valve.
Conclusion:
The Sorin Pericarbon stentless pericardial prosthesis showed excellent hemodynamic performance, even if implanted in a matching-size aortic root. The implantation technique used had no significant influence on valve performance.