Key result
Early M-TEER based on MR subtype before advanced ventricular remodeling improves outcomes.
Why the study?
Growing evidence supports shifting from binary MR classification to a subtype-based approach, as anatomical and pathophysiological heterogeneity and intervention timing impact M-TEER outcomes.
Does transcatheter mitral edge-to-edge repair (M-TEER) improve outcomes in patients with primary and secondary mitral regurgitation?
Does transcatheter mitral edge-to-edge repair (M-TEER) improve outcomes in patients with primary and secondary mitral regurgitation?
This review highlights that integrating mitral regurgitation subtyping with optimal intervention timing is critical for maximizing the benefits of transcatheter mitral edge-to-edge repair.
Subtype-guided early M-TEER may improve outcomes; challenges broad classifications but leaves open randomized validation.
In the era of mitral transcatheter edge-to-edge repair (M-TEER), growing evidence continues to support a shift from a binary classification of mitral regurgitation (MR) into primary and secondary forms toward a more refined, subtype-based approach. Additionally, anatomical and pathophysiological heterogeneity significantly influences procedural complexity, durability of repair, and clinical outcomes within both primary and secondary MR. Furthermore, recent trials suggest that the timing of the intervention is as critical as patient anatomy; delaying treatment until advanced ventricular remodeling has occurred may limit the benefits of MR reduction. Moreover, long-term data on durability and device-failure management remain limited, particularly in secondary MR, where the progression of the underlying cardiomyopathy largely determines the outcomes. Thus, this review underscores how integrating MR subtyping with intervention strategies may influence patient selection and highlights the need for future research to adopt a more individualized, mechanism-driven approach.
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Amicone et al. (2025) studied this question. Intervening early based on mitral regurgitation subtype prior to advanced ventricular remodeling improves outcomes in patients undergoing M-TEER.
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