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  • Title: Initial report of off-pump coronary artery bypass surgery as sole therapy for moderate ischemic mitral regurgitation: operative and intermediate-term outcome.
    Author: Harris KM, Reddy A, Aepplii D, Wilson B, Emery RW.
    Journal: Heart Surg Forum; 2005; 8(2):E89-93. PubMed ID: 15769731.
    Abstract:
    BACKGROUND: Patients undergoing on-pump coronary artery bypass surgery (CAB) with coexistent moderate ischemic mitral regurgitation (IMR) have a significant mortality rate compared to patients without MR. The mortality rate is elevated both perioperatively (0%-12% mortality), as well as over a 1- and 2-year postoperative period (15%-25%). It is thought that some patients are best served by off-pump CAB (OPCAB); however, outcomes have not been reported for such patients with coexistent moderate IMR. METHODS: We reviewed the independent database of patients undergoing OPCAB between 1995 and 2002 to find 989 patients, 17 (1.7%) of whom had moderate or moderately severe MR. Patients were contacted and clinical and echocardiographic data were obtained. RESULTS: The patient group consisted of 11 men and 6 women (age, 65 +/- 15 years). The study group had a PA pressure of 52 +/- 14, creatinine of 1.6 +/- 0.7, and left ventricular ejection fraction of 43 +/- 18. Nine patients (53%) had advanced New York Heart Association (class III-IV) heart failure. Mortality rates perioperatively and at 1, 2, and 3 years were 0%, 6.25% (1/16), 12.5% (2/16), and 38% (4/8), respectively. At the time of this report, no patient had returned for a reparative procedure. CONCLUSION: In patients felt to be best served by OPCAB with ischemic MR, operative and intermediate mortality rates are remarkably similar to those previously reported for on-pump series. These data underscore the continued need to understand which patients undergoing CAB require mitral valve problems to be addressed at the time of surgery.
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