Does Mitral Regurgitation Mechanism Matter After M-TEER?

Overview

A study evaluated 442 patients undergoing mitral transcatheter edge-to-edge repair (M-TEER) and found modest changes in left ventricular diameters across different mitral regurgitation mechanisms. Pulmonary artery systolic pressure responses varied significantly by subtype, indicating differential hemodynamic outcomes post-procedure.

Background

Mitral regurgitation (MR) is a significant clinical concern, particularly in patients with heart failure. Transcatheter edge-to-edge repair (M-TEER) is a recommended treatment for severe secondary MR, especially in high-risk surgical patients.

Data Highlights

Key Findings

• Modest changes in left ventricular diameters were observed across mitral regurgitation mechanisms after M-TEER.
• The average change in mitral regurgitation grade was −2.42 at 1 month, with a median change of −3 grades.
• No statistically significant differences in LV diameter changes were noted among different mitral regurgitation subtypes.
• Pulmonary artery systolic pressure changes varied significantly by mitral regurgitation subtype.
• In the no-clip cohort, median changes were −0.30 cm for LV end-diastolic diameter and −18 mmHg for pulmonary artery systolic pressure.

Clinical Implications

The findings indicate that LV dimensional remodeling is modest across MR mechanisms, while pulmonary artery systolic pressure responses vary by subtype.

Conclusion

The study presents findings on the modest changes in left ventricular dimensions and varying pulmonary artery systolic pressure responses following M-TEER across different mitral regurgitation mechanisms.

Related Resources & Content

1. Biswas M, et al., Journal of the American Society of Echocardiography, 2026 -- Does Mitral Regurgitation Mechanism Matter After M-TEER?
2. Clinical Research in Cardiology — Differential effects of transcatheter edge-to-edge repair on forward stroke volume in atrial and ventricular secondary mitral regurgitation
3. Clinical Research in Cardiology (Springer) — Edge-to-edge transcatheter repair of the mitral valve for severe mitral regurgitation in patients exhibiting HFpEF characteristics
4. Clinical Research in Cardiology — Effects of Asymmetric Tethering on Outcomes Following Edge-to-Edge Mitral Valve Repair for Secondary Mitral Regurgitation
5. Clinical Research in Cardiology — Echocardiographic and Invasive RV-PA Coupling as Predictors of Mortality Following Edge-to-Edge Repair for Degenerative Mitral Regurgitation: Findings from a Single-Center Observational Study
6. Differential effects of transcatheter edge-to-edge repair on forward stroke volume in atrial and ventricular secondary mitral regurgitation
7. Edge-to-edge transcatheter repair of the mitral valve for severe mitral regurgitation in patients exhibiting HFpEF characteristics
8. 2025 ESC/EACTS Guidelines for the management of valvular heart disease | European Heart Journal | Oxford Academic
9. 2024 ACC/AHA Clinical Performance and Quality Measures for Adults With Valvular and Structural Heart Disease: A Report of the American Heart Association/American College of Cardiology Joint Committee on Performance Measures | JACC
10. Transcatheter Valve Repair in Heart Failure with Moderate to Severe Mitral Regurgitation | New England Journal of Medicine
11. CLASP IID Trial and Registry: 2-Year Outcomes of Transcatheter Repair for Degenerative Mitral Regurgitation - PubMed
12. Intraprocedural Imaging for Mitral Valve Transcatheter Edge-to-Edge Repair – ASE
13. Mitral Transcatheter Edge-to-Edge Repair in Patients With Atrial Functional Mitral Regurgitation | JACC
14. Clinical and Hemodynamic Effects of Percutaneous Edge-to-Edge Mitral Valve Repair in Atrial Versus Ventricular Functional Mitral Regurgitation - PubMed