Direct Oral Anticoagulants Versus Vitamin K Antagonists After Mitral Valve Transcatheter Edge-to-Edge Repair in Patients With Atrial Fibrillation: A Single-Center Observational Study.

BACKGROUND

Mitral valve transcatheter edge-to-edge repair (M-TEER) has emerged as a viable therapy option in patients with severe mitral regurgitation and high surgical risk. Although atrial fibrillation is common among patients undergoing M-TEER, the optimal anticoagulatory treatment after the intervention is unknown.

METHODS

A single-center retrospective observational analysis was conducted using data from the M-TEER registry at the University Hospital Cologne collected from 2019 untill 2021 including patients undergoing M-TEER between November 2012 and April 2019. Patients with atrial fibrillation receiving consistent anticoagulation following M-TEER were categorized into a direct oral anticoagulant or a vitamin K antagonist (VKA) group. The primary end point was a composite of ischemic cerebrovascular and bleeding events. Additionally, overall survival was assessed.

RESULTS

Among 613 patients undergoing M-TEER, 206 met the inclusion criteria, with 61 receiving direct oral anticoagulants and 145 receiving VKAs. After a median follow-up of 833 (interquartile range, 355-1271) days, the incidence of the composite primary end point did not differ between direct oral anticoagulant and VKA groups (hazard ratio [HR], 0.51 [95% CI, 0.23-1.12]; P=0.07). Similarly, rates of ischemic cerebrovascular events and bleeding events were similar between groups. However, the overall mortality rate was higher in the VKA group (HR, 2.56 [95% CI, 1.54-4.26]; P=0.002). In the multivariable analysis, oral anticoagulation with a VKA was an independent predictor for death (adjusted HR, 2.23 [95% CI, 1.08-5.06]; P=0.03).

CONCLUSIONS

Our findings suggest that direct oral anticoagulants may offer comparable efficacy and safety to VKAs in preventing thromboembolic events following M-TEER in patients with atrial fibrillation. Further randomized trials are needed to confirm these results and establish optimal anticoagulation strategies in this patient population.