Introduction
The relationship between right ventricular (RV) function and prognosis has been reported in various cardiac diseases, including mitral regurgitation (MR).(1-6) After transcatheter mitral valve repair (TMVr), patients with RV dysfunction had an increased risk of all-cause mortality.(7) TMVr has the potential to restore RV function, which was shown in early experiences with the MitraClip (Abbott, Abbott Park, IL).(8) To date, only a few reports have provided data regarding RV function during follow-up.(8-10) Further, little is known regarding the impact of RV function and its cut-off value for predicting adverse outcomes following MitraClip therapy. The aim of this study was to investigate the prognostic impact of RV function following TMVr using MitraClip.