Introduction to Early Reverse Remodeling

Left ventricular reverse remodeling (LVRR) remains a primary goal for modern heart failure therapies. This process involves the reversal of left ventricular dilation and the restoration of cardiac function. Recently, the EXPANDed studies investigated how Mitral Transcatheter Edge-to-Edge Repair (M-TEER) influences this phenomenon across different patient populations. The research specifically analyzed the incidence and clinical impact of early LVRR, defined as a 10% reduction in LV dimensions within 30 days of the procedure.

Clinical Impact in Secondary Mitral Regurgitation

Among patients with secondary mitral regurgitation (SMR), the study found that 64.1% experienced early LVRR after the procedure. Notably, these patients demonstrated superior clinical trajectories compared to those without early remodeling. At the one-year mark, the LVRR group showed a significantly lower rate of death or heart failure hospitalizations at 24.7%, compared to 35.9% in the non-LVRR group. Furthermore, these benefits occurred despite both groups achieving similar levels of MR reduction and quality-of-life improvements. Consequently, early structural changes appear to be a distinct predictor of long-term stability in SMR cases.

Mitral Transcatheter Edge-to-Edge Repair in Primary MR

In the primary mitral regurgitation (PMR) cohort, approximately 73% of patients achieved early LVRR. While overall symptomatic improvements were comparable across the PMR group, specific sub-populations derived more profound benefits. Specifically, PMR patients with dilated ventricles who experienced LVRR had a significantly lower mortality rate of 3.8% compared to 14.0% in those who did not remodel. Therefore, Mitral Transcatheter Edge-to-Edge Repair provides critical survival advantages for patients with significant ventricular enlargement.

Predictors and Associations of LVRR

The investigators identified several independent factors associated with a higher likelihood of early remodeling. Hypertension and smaller baseline left ventricular end-systolic volumes (LVESV) both positively correlated with LVRR. Additionally, the absence of prior cardiac surgeries increased the odds of successful reverse remodeling. These findings suggest that early intervention before the onset of irreversible ventricular damage may optimize procedural outcomes.

Frequently Asked Questions

What defines early LVRR in the context of M-TEER?

In these studies, researchers defined early LVRR as at least a 10% reduction in left ventricular dimension or volume from baseline to 30 days post-procedure, as measured by independent core laboratories.

Does LVRR occur at different rates in PMR and SMR?

Yes, the studies showed that 73% of PMR patients experienced early LVRR compared to 64.1% of SMR patients. However, the association between LVRR and reduced death or hospitalization was particularly prominent in SMR patients.

Disclaimer: This content is for informational and educational purposes only and does not constitute medical advice or a professional relationship. Always seek the advice of a physician or other qualified health provider with any questions regarding a medical condition. Refer to the latest local and national guidelines for clinical practice.

References

Keßler M et al. Left Ventricular Reverse Remodeling after Mitral Transcatheter Edge-to-Edge Repair: Results from the EXPANDed Studies. ESC Heart Fail. 2026 Mar 16. doi: undefined. PMID: 41839533.

Stone GW et al. Transcatheter Mitral-Valve Repair in Patients with Heart Failure and Secondary Mitral Regurgitation. N Engl J Med. 2018;379(24):2307-2318.

Mack MJ et al. 1-Year Outcomes of Transcatheter Mitral Valve Repair for Secondary Mitral Regurgitation: The EXPAND Study. JACC Cardiovasc Interv. 2021;14(11):1195-1205.