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Higuchi, Satoshi; Orban, Mathias; Stolz, Lukas; Karam, Nicole; Praz, Fabien; Kalbacher, Daniel; Ludwig, Sebastian; Braun, Daniel; Näbauer, Michael; Wild, Mirjam G.; Neuss, Michael; Butter, Christian; Kassar, Mohammad; Petrescu, Aniela; Pfister, Roman; Iliadis, Christos; Unterhuber, Matthias; Park, Sang-Don; Thiele, Holger; Baldus, Stephan; von Bardeleben, Stephan; Schofer, Niklas; Massberg, Steffen; Windecker, Stephan; Lurz, Philipp; Hausleiter, Jörg
JACC. Cardiovascular interventions, 06/2021, Volume: 14, Issue: 11Journal Article
The aim of this study was to assess the impact of residual mitral regurgitation (resMR) on mortality with respect to left ventricular dilatation (LV-Dil) or right ventricular dysfunction (RV-Dys) in patients with secondary mitral regurgitation (SMR) who underwent mitral valve transcatheter edge-to-edge repair (TEER). The presence of LV-Dil and RV-Dys correlates with advanced stages of heart failure in SMR patients, which may impact the outcome after TEER. SMR patients in a European multicenter registry were evaluated. Investigated outcomes were 2-year all-cause mortality and improvement in New York Heart Association functional class with respect to MR reduction, LV-Dil (defined as LV end-diastolic volume ≥159 ml), and RV-Dys (defined as tricuspid annular plane systolic excursion-to-systolic pulmonary artery pressure ratio of <0.274 mm/mm Hg). Among 809 included patients, resMR ≤1+ was achieved in 546 (67%) patients. Overall estimated 2-year mortality rate was 32%. Post-procedural resMR was significantly associated with mortality (p = 0.031). Although the improvement in New York Heart Association functional class persisted regardless of either LV-Dil or RV-Dys, the beneficial treatment effect of resMR ≤1+ on 2-year mortality was observed only in patients without LV-Dil and RV-Dys (hazard ratio: 1.75; 95% confidence interval: 1.03 to 3.00). Achieving optimal MR reduction by TEER is associated with improved survival in SMR patients, especially if the progress in heart failure is not too advanced. In SMR patients with advanced stages of heart failure, as evidenced by LV-Dil or RV-Dys, the treatment effect of TEER on symptomatic improvement is maintained, but the survival benefit appears to be reduced. Display omitted
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