Abstract 15321: Impact of Exercise Right Ventricular Performance on Functional Capacity in Patients Undergoing Mitral Valve Surgery for Chronic Ischemic Mitral Regurgitation: A Longitudinal Study

Introduction: Data on the exercise hemodynamic performance of the right ventricle (RV) in patients undergoing mitral valve surgery (MVS) for chronic ischemic mitral regurgitation (CIMR) are sparse. The aim of the study was to investigate the impact of resting and exercise RV function on functional capacity in patients undergoing MVS and CABG for CIMR. Methods: In this prospective longitudinal study, 41 patients, with CIMR (mean age: 68 ± 9 years. Mean EF: 37± 5%) undergoing MVS and CABG ,were enrolled between 2009 and 2016. Comprehensive both resting and exercise echocardiography were performed , along with six-minute walking test (6-MWT), preoperatively, at 1 year and at last follow-up (median follow-up 64 months, IQR: 26-97 months) with a specific focus on parameters of right ventricular geometry and function. Multivariable mixed effects linear regression was used to assess independent predictors of 6-MWT distance. Results: exercise mean mitral gradient increased from baseline to follow-up (1.6±0.3 vs 9...