Abstract
Background
Functional mitral regurgitation (FMR) carries poor prognosis, and optimal management remains debated. Mitral Transcatheter Edge-to-Edge Repair (MTEER) is an alternative to surgical repair (SMVR) or optimized medical therapy (OMT), but long-term outcomes are uncertain.Methods
PubMed, Embase, Scopus, and the Cochrane Library were searched for studies reporting Kaplan-Meier curves of MTEER, SMVR, or OMT in FMR. Individual patient data (IPD) were reconstructed using the Liu method with accuracy checks. Pooled IPD were analyzed with Cox and time-varying Cox models, landmark, time-restricted, and restricted mean survival time analyses.Results
Sixteen studies (n = 4,570) were included. Patients undergoing MTEER were older and higher risk, with greater prevalence of atrial fibrillation, prior myocardial infarction, chronic kidney disease, higher EuroSCORE, and more frequent NYHA class ≥ III compared with SMVR. Over up to 60 months, both MTEER (HR: 0.65; 95% CI: 0.57-0.75; p 2 (HR: 3.31; 95% CI: 1.62-6.75; p Conclusions
MTEER improves survival and reduces hospitalization and MACE compared with OMT but is less durable than SMVR, with higher risks of recurrent MR, reoperation, and late mortality.