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  • Title: Ischemic mitral valve repair surgery.
    Author: von Oppell UO, Stemmet F, Brink J, Commerford PJ, Heijke SA.
    Journal: J Heart Valve Dis; 2000 Jan; 9(1):64-73; discussion 73-4. PubMed ID: 10678377.
    Abstract:
    BACKGROUND AND AIM OF THE STUDY: The management of concomitant moderate or severe ischemic mitral regurgitation in the presence of ischemic heart disease is important for long-term prognosis. Mitral repair by either a suture or ring annuloplasty method has been advocated, although clear superiority of either method has not been established. METHODS: Combined coronary artery bypass and mitral valve surgery for ischemic mitral incompetence was performed on 68 consecutive patients between January 1996 and December 1998. The outcome in 63 of these patients (35 females, 28 males) who underwent mitral valve repair was reviewed. RESULTS: Average patient age was 61+/-9.4 years (range: 39-81 years). Average left ventricular ejection fraction (LVEF) was 42.1%; a suture annuloplasty was used in 84% and a ring in 16%. The average number of distal anastomoses was 3.9+/-1.1 (range: 1-6) and aortic cross-clamp time was 131+/-35 min (range: 58-238 min). Operative mortality rate (<30 days or in-hospital) was 12.7% and only requirement for intra-aortic balloon pumping either before or during surgery (21%) was predictive (p<0.05). On discharge, 98.2% of patients were in NYHA class I or II. Follow up (range: 1-35 months) was complete in 95% of cases. Moderate mitral regurgitation on discharge occurred in nine patients and was not related to the type of annuloplasty. Predictive risk factors were preoperative severe mitral regurgitation (p<0.04), poor LVEF (p = 0.05), and was predictive of deterioration of NYHA class (p<0.02), progression of regurgitation (p<0.05), and poor outcome (p<0.01). Poor outcome was also related to surgeon's experience. Structural valvular deterioration occurred in 21.8% of operative survivors, and there was one reoperation and four late deaths. The survival rate (including operative deaths) at 35 months was 68.3 +/- 13.1%, and event-free survival rate (no mortality, reoperation or angina) 65.2+/-6.2%. CONCLUSIONS: The type of annuloplasty used did not influence outcome. The risk of structural mitral valve dysfunction on follow up was related to severe preoperative mitral regurgitation, poor LVEF, surgeon's experience, and was predictive of poor outcome.
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