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Background and purpose: Influence factors on the outcome of coronary artery disease have always been important for choosing the best treatment option. Ischemic mitral regurgitation (IMR) is one of these factors. Treating patients with coronary artery bypass grafting (CABG) and concomitant dysfunctional valve repair has always been a challenge since there are many risks involved. The purpose of this study was to investigate the changes of IMR after coronary artery bypass grafting, to make a rational decision about surgical repair of mitral valve insufficiency during CABG.. Materials and methods: A semi-experimental study was conducted in patients with coronary artery disease and IMR who underwent isolated CABG between 2011–2013. Echocardiography was performed for patients before and after CABG. Results: The study was performed in 80 patients who were divided into three groups. The patients were 36.6% in mild, 42.5% in mild to moderate and 21.3% were in moderate group. After surgery, 55% were in mild, 38.8% in mild to moderate and 6.3% were in moderate group. In this study, the greatest change was observed in mild to moderate group. Conclusion: According to the results of the intervention surgery (CABG) in patients with IMR both Mild To Moderate and Moderate improves levels of IMR and reduced the severity of MR, but in Mild group these changes were statistically significant (P<0.05).

Keywords: Ischemic mitral regurgitation, coronary artery bypass, coronary artery disease, echocardiography

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