Sun X, et al. - Researchers, in this work, explored the predictors of the improvement in moderate ischaemic mitral regurgitation (IMR) after off-pump coronary artery bypass grafting (OPCAB) focusing on left ventricular (LV) dyssynchrony. Findings suggested that coronary artery bypass grafting could relieve preoperative moderate IMR in selected patients. The improvement in moderate IMR after coronary artery bypass grafting could be predicted with greater ejection fraction and absence of LV regional dyssynchrony, suggesting that LV dyssynchrony especially regional dyssynchrony and preserved ventricular function would be important to the outcome of patients with moderate IMR.