Long-Term Outcomes After Edge-to-Edge Repair of Secondary Mitral Regurgitation: 5-Year Results From the EuroSMR Registry

JACC Cardiovasc Interv. 2024 Nov 11;17(21):2543-2554. doi: 10.1016/j.jcin.2024.08.016.

Abstract

Background: Mitral valve transcatheter edge-to-edge repair (M-TEER) reduces secondary mitral regurgitation (MR) in heart failure and impacts survival in selected patients as demonstrated in the COAPT (Cardiovascular Outcomes Assessment of the MitraClip Percutaneous Therapy for Heart Failure Patients with Functional Mitral Regurgitation) trial. However, long-term outcome data after M-TEER under real-world conditions are lacking.

Objectives: This study sought to assess long-term efficacy and survival after M-TEER in a large real-world registry.

Methods: We analyzed patients with significant secondary MR undergoing M-TEER from the EuroSMR (European Registry of Transcatheter Repair for Secondary Mitral Regurgitation) registry. Long-term MR reduction, functional outcomes, survival rate, and predictors for all-cause mortality were assessed.

Results: In this study, 1,628 patients undergoing M-TEER (mean age 73.8 years, mean EuroSCORE II [European System for Cardiac Operative Risk Evaluation II] 6.9%, 86.6% NYHA functional class ≥III) with available long-term data were included. Five-year survival was 35.0%. Long-term MR reduction (MR grade ≤2+: baseline 4.1%, discharge 92.2%, 5-year follow-up 85.5%; P < 0.001) and functional improvement (NYHA ≤II: baseline 13.4%, 5-year follow-up 60.1%; P < 0.001) was observed. The degree of residual MR was associated with 5-year survival (residual MR grade ≤1+: 38.6%; 2+: 30.5%; ≥3+: 22.6%; P < 0.001). Independent predictors for 5-year all-cause mortality post-M-TEER included age, renal function, residual MR, NYHA functional class, left ventricular ejection-fraction, and COAPT trial eligibility (P < 0.01 for all).

Conclusions: This extensive multicenter registry underscores the long-term efficacy of M-TEER in real-world clinical practice and identifies predictors for long-term survival. These findings contribute valuable insights for optimizing patient selection in routine clinical interventions.

Keywords: heart failure; long-term follow-up; mitral regurgitation; mitral valve transcatheter edge-to-edge repair.

Publication types

  • Multicenter Study
  • Observational Study

MeSH terms

  • Aged
  • Aged, 80 and over
  • Cardiac Catheterization* / adverse effects
  • Cardiac Catheterization* / instrumentation
  • Cardiac Catheterization* / mortality
  • Europe
  • Female
  • Functional Status
  • Heart Valve Prosthesis Implantation* / adverse effects
  • Heart Valve Prosthesis Implantation* / instrumentation
  • Heart Valve Prosthesis Implantation* / mortality
  • Humans
  • Male
  • Middle Aged
  • Mitral Valve Insufficiency* / diagnostic imaging
  • Mitral Valve Insufficiency* / mortality
  • Mitral Valve Insufficiency* / physiopathology
  • Mitral Valve Insufficiency* / surgery
  • Mitral Valve* / diagnostic imaging
  • Mitral Valve* / physiopathology
  • Mitral Valve* / surgery
  • Recovery of Function*
  • Registries*
  • Risk Assessment
  • Risk Factors
  • Time Factors
  • Treatment Outcome
  • Ventricular Function, Left