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Moderate ischemic mitral regurgitation: coronary artery bypass grafting with versus without simultaneous treatment of the mitral valve.
Journal of Cardiovascular Surgery 2018 December
BACKGROUND: Ischemic mitral regurgitation (IMR) is a frequent complication of coronary artery heart disease and is associated with increased mortality. Controversies exists whether patients with moderate IMR may benefit from a combined procedure with coronary artery bypass grafting (CABG) and treatment of mitral regurgitation.
METHODS: 451 patients with moderate IMR (grade 2) receiving either CABG alone (CABG only) or additional mitral valve repair or replacement (CABG+MV) were included in this observational single-centre study. Patients were matched according to the number of bypass grafts, preoperative NYHA functional class and age. In total, 42 patients (21 CABG only, 21 CABG+MV) were analysed.
RESULTS: The mean follow-up was 4.3±1.9 years. CABG alone reduced the IMR grade to 1.2±0.5, whereas the combined procedure resulted in a decrease to 0.6±0.7 (P=0.039). NYHA functional class was reduced from grade 2.8±0.6 to 1.6±0.5 (CABG only) and 2.0±1.1 (CABG+MV, P=0.55). Three- and five-year survival rates were 71% and 53% in the CABG only group compared to 60% both after 3 and 5 years in the CABG+MV group (P=0.89).
CONCLUSIONS: In this observational study, combined CABG and surgical treatment of moderate IMR was associated with a more effective reduction of IMR than CABG alone. No statistically significant differences in survival or NYHA functional class were observed. Further studies will need to investigate the value of additional mitral valve surgery in moderate IMR.
METHODS: 451 patients with moderate IMR (grade 2) receiving either CABG alone (CABG only) or additional mitral valve repair or replacement (CABG+MV) were included in this observational single-centre study. Patients were matched according to the number of bypass grafts, preoperative NYHA functional class and age. In total, 42 patients (21 CABG only, 21 CABG+MV) were analysed.
RESULTS: The mean follow-up was 4.3±1.9 years. CABG alone reduced the IMR grade to 1.2±0.5, whereas the combined procedure resulted in a decrease to 0.6±0.7 (P=0.039). NYHA functional class was reduced from grade 2.8±0.6 to 1.6±0.5 (CABG only) and 2.0±1.1 (CABG+MV, P=0.55). Three- and five-year survival rates were 71% and 53% in the CABG only group compared to 60% both after 3 and 5 years in the CABG+MV group (P=0.89).
CONCLUSIONS: In this observational study, combined CABG and surgical treatment of moderate IMR was associated with a more effective reduction of IMR than CABG alone. No statistically significant differences in survival or NYHA functional class were observed. Further studies will need to investigate the value of additional mitral valve surgery in moderate IMR.
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