Impact of coronary artery bypass surgery on ischemic mitral regurgitation.

Introduction: t o determine the course of ischemic mitral regurgitation (Imr) after coro- nary artery bypass grafting ( caBg), and evaluate preoperative factors which predict the development of the severity of I mr after caBg. the mean follow-up time was 6.5 years. Results: at the time of caBg, 66% of the 131 cases analyzed had mild, 31% had mod- erate, and 3% had severe Imr. at the time of follow-up, 52% of patients had either no Imr or mild I mr , 27% had moderate I mr , 6% had severe I mr and 15% suffered from cardiac related death. During follow-up I mr grade reduced in 25% of study patients. none of the patient had re-operation due to the mitral regurgitation. multivariate analy- sis showed that left ventricular ejection fraction ( l Vef) was an independent predictor of good prognosis ( o .r . 1.4, 95% c.I. 1.15-1.83/ 10% increase of l Vef, p = 0.02). Conclusion: half of the patients, who have I mr at the time of caBg, have no I mr or only mild I mr postoperatively. good l Vef adds to the probability that