The risk factors of mitral insufficiency recurrence after coronary artery bypass grafting with or without mitral valve repair in patients with ischemic cardiomyopathy

Aim: This study aimed to identify risk factors for mitral insufficiency (MI) recurrence after isolated coronary artery bypass grafting (CABG) and for CABG with mitral valve (MV) repair of moderate MI in patients with ischemic cardiomyopathy.

Material and Methods: This is a single-centre prospective study. We included 76 patients with moderate MI and poor left ventricular function (EF <35%). The patients underwent isolated CABG or CABG with MV repair. The age of the patients was 57±8 years, and 90% were men. MV repair was restricting annuloplasty using a rigid ring with a size of 26–30.

Results: The total complications in the long-term period were 19 (52.7%) and 8 (23.5%) in the isolated CABG and CABG + MV repair groups, respectively (p=0.015). After isolated CABG in patients suffering ischemic cardiomyopathy (IC) and moderate MI, progression of MI (grade 3) initially 0%, after 12 months, 31%, after 36 months, 71%, p <0.001 is observed.

Conclusion: Isolated CABG or CABG with MV repair in patients with IC does not result in a significant decrease in MI in the long-term, when compared with the baseline. The revealing of the predictors of the progression of MI made it possible to determine the threshold values of the performance indicators of MV repair and assisted with the determination of the surgical treatment strategies for patients with moderate MI.