Possible Effect of CABG on Moderate Mitral Regurgitation

Introduction: Mitral valve insufficiency in adults is often a complication of ischemic heart disease. Coronary artery bypass grafting (CABG) is performed as a strategy for the treatment of coronary artery disease. The aim of this study was to evaluate mitral regurgitation (MR) before and after CABG. Materials and Methods: This Experimental study was conducted on 100 patients who underwent CABG in University Hospitals of Tehran, Iran, from 2009 to 2013. Statistical Package for the Social Sciences (SPSS) version 16 (SPSS Inc. Chicago, IL) for Windows was used for data analysis.. Results: Out of 100 patients (i.e., 60 males and 40 females) with the mean age of 64.97±10.64 years, 11 males (18.3%) and 12 females (30.0%) were identified with MR +2 after the surgery. There was no significant relationship between renal insufficiency and MR before the operation (P= 0.370). Furthermore, in patients with and without renal insufficiency, 2 (50.0%) and 21 (21.9%) subjects were identified with MR +2 after the operation, respectively. Out of 100 patients, 75 (75%) cases with MR +2 before the surgery were identified with MR +1 after the operation. Moreover, 23 (23%) subjects with MR +2 before the surgery were still reported with MR +2 after the operation. In this regard, there was a significant relationship before and after the surgery in MR severity (P=0.02). Conclusion: It is necessary to have sufficient knowledge of the risk factors in dealing with MR for the determination of the best therapy.