The impact of surgical ventricular restoration on ischemic mitral regurgitation.

Objective: The aim of current study was to evaluate and compare the changes in clinical status and mitral regurgitation (MR) grade and long-term postoperative survival after left ventricle surgical restoration (SVR) operations.

Material And Methods: We retrospectively analyzed the data of 139 patients suffering from ischemic heart disease and left ventricular aneurysms or large akinesia, who underwent SVR and coronary artery bypass grafting without MR surgical correction between 1999 and 2006. The mean long-term postoperative follow-up was 3.6 years (SD, 3.0). Nine patients (6.5%) died during the first 30 postoperative days.

Results: The mean MR grade during the long-term period increased significantly. The univariate logistic regression analysis showed that factors for the long-term mortality were age (P=0.002), decompensation signs before SVR (P=0.03), treatment with diuretics (P=0.01), NYHA functional class IV (P=0.008), and moderate and severe MR (P=0.04); however, multivariate logistic regression analysis demonstrated that only patient's age was an independent predictive factor (P=0.004). MR correction was found to be a significant prognostic factor of borderline significance for perioperative mortality (P=0.05). The analysis of MR grade (mild versus moderate versus severe) impact on long-term survival failed to demonstrate any association (P=0.22).

Conclusions: Remodeling continued during the long-term period after SVR and CABG: there was an increase in the mean MR degree. Left ventricular remodeling with moderate and severe MR decreased survival rates during long-term period after surgical ventricular restoration; however, mitral regurgitation was not found to be an independent predictor of poor outcome.