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The potential benefit of adding mitral valve repair (MVR) to coronary artery bypass grafting (CABG) in patients with moderate mitral regurgitation (MR) is uncertain. In this multicenter trial (NCT00806988), 301 patients with ischemic moderate MR (inclusion criterion for effective regurgitant orifice area [EROA], 0.2–0.4 cm2) were randomized to CABG plus MVR or to CABG alone (mean age, 65; men, 68%; left ventricular [LV] ejection fraction, ~40%). The primary endpoint, an echocardiographic measure of reverse LV remodeling, was LV end-systolic volume index (ESVI) at 12 months.
The mean EROA was 0.2 cm2 in both groups. Mean LVESVI at 12 months was similar in the two groups, with a mean decrease of 9 mL/m2. The groups showed no significant differ…