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Karam, Nicole; Stolz, Lukas; Orban, Mathias; Deseive, Simon; Praz, Fabien; Kalbacher, Daniel; Westermann, Dirk; Braun, Daniel; Näbauer, Michael; Neuss, Michael; Butter, Christian; Kassar, Mohammad; Petrescu, Aniela; Pfister, Roman; Iliadis, Christos; Unterhuber, Matthias; Park, Sang-Don; Thiele, Holger; Baldus, Stephan; Stephan von Bardeleben, Ralph; Blankenberg, Stefan; Massberg, Steffen; Windecker, Stephan; Lurz, Philipp; Hausleiter, Jörg
JACC. Cardiovascular imaging, April 2021, 2021-04-00, 20210401, Volume: 14, Issue: 4Journal Article
This study sought to assess the impact of right ventricular dysfunction (RVD) as defined by impaired right ventricular-to-pulmonary artery (RV-PA) coupling, on survival after edge-to-edge transcatheter mitral valve repair (TMVR) for severe secondary mitral regurgitation (SMR). Conflicting data exist regarding the benefit of TMVR in severe SMR. A possible explanation could be differences in RVD. Using data from the EuroSMR (European Registry on Outcomes in Secondary Mitral Regurgitation) registry, this study compared the characteristics and outcomes of SMR patients undergoing TMVR, according to their RV-PA coupling, assessed by tricuspid annular plane systolic excursion-to-systolic pulmonary artery pressure (TAPSE/sPAP) ratio. Overall, 817 patients with severe SMR and available RV-PA coupling assessment underwent TMVR in the participating centers. RVD was present in 211 patients (25.8% with a TAPSE/sPAP ratio <0.274 mm/mm Hg). Although all patients demonstrated significant improvement in their New York Heart Association (NYHA) functional class, there was a trend toward a lower rate of NYHA functional class I or II among patients with RVD (56.5% vs. 65.5%, respectively; p = 0.086) after TMVR. Survival rates at 1 and 2 years were lower among patients with RVD (70.2% vs. 84.0%, respectively; p < 0.001; and 53.4% vs. 73.1%, respectively; p < 0.001). On multivariate analysis, a reduced TAPSE/sPAP ratio was a strong predictor of mortality (odds ratio: 1.62; 95% confidence interval: 1.14 to 2.31; p = 0.007). RVD, as shown by impairment of RV-PA coupling, is a major predictor of adverse outcome in patients undergoing TMVR for severe SMR. The often neglected functional and anatomic RV parameters should be systematically assessed when planning TMVR procedures for patients with severe SMR. Display omitted
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