Efficacy and Safety of Uninterrupted Periprocedural Edoxaban in Patients Undergoing Catheter Ablation for Atrial Fibrillation - The Prospective KYU-RABLE Study.

BACKGROUND: The KYU-RABLE study, a prospective, multicenter, single-arm interventional study, evaluated the efficacy and safety of uninterrupted oral edoxaban in patients undergoing catheter ablation (CA) for atrial fibrillation (AF).Methods and Results:We enrolled patients with AF from 23 centers in Japan. Edoxaban 60 mg (30 mg in patients indicated for dose adjustment) was administered uninterrupted, once daily in the morning for ≥4 weeks before CA and 4 weeks ±7 days after CA with one dose delayed on the procedural day. The primary endpoint was a composite of thromboembolism and major bleeding during 4 weeks from the procedural day. Among the 513 eligible patients who underwent CA, 63.5% received edoxaban 60 mg/day and 36.1% received 30 mg/day. For the primary endpoint, no thromboembolism and 1 major bleeding event (0.2%, cardiac tamponade) were observed. The plasma edoxaban concentration decreased depending on the time from the last administration to the CA procedure. However, plasma levels of coagulative biomarkers were within appropriate ranges regardless of the interval from the last administration of edoxaban. CONCLUSIONS: The present study provided evidence of the efficacy and safety of uninterrupted edoxaban administered once daily in the morning, with one dose delayed on procedural day, in patients with AF undergoing CA. Edoxaban was associated with a low risk of periprocedural thromboembolic and bleeding complications.