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" ... Surgery is thought to be life-saving for people who have ischemic mitral regurgitation, but it is unknown whether surgical repair or surgical replacement of the mitral valve is the better procedure. Repair is thought to result in fewer preoperative deaths and replacement is thought to have better long-term outcomes with a reduced incidence of recurrent mitral regurgitation. In recent years, many surgeons have grown to favor repair. Currently about two-thirds of patients in the US undergo a repair operation. ... "