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Funding Acknowledgements Type of funding sources: Private company. Main funding source(s): Daiichi Sankyo Co., Ltd. OnBehalf ANAFIE Registry Group Backgrounds Benefits of catheter ablation (CA) have been shown for patients with atrial fibrillation (AF). However, data in elderly patients aged ≥75 years who have undergone CA for non-valvular AF (NVAF) are insufficient. Purpose The All Nippon Atrial Fibrillation In the Elderly (ANAFIE) Registry is a prospective, multicenter, observational study, which was designed to collect the real-world data on the clinical status and prognosis in 30,000 over Japanese patients (aged ≥75 years) with NVAF. This cross-sectional subanalysis of the ANAFIE registry assessed the 2-year outcomes and anticoagulant treatment in elderly NVAF patients with a history of CA. Methods A total of the 32,275 patients from the ANAFIE registry were divided into two groups by a history of CA: the CA and No-CA groups. Kaplan-Meier analysis was used to evaluate the annualized incidences of stroke/systemic embolic event (SEE), major bleeding, intracranial hemorrhage (ICH), heart failure requiring hospitalization (HF), and all-cause mortality. Hazard ratio (HR) for each event was analyzed using the Cox proportional-hazards model. Results Of all patients, 2,970 patients (9.2%) were included in the CA group and 29,305 (90.8%) were included in the No-CA group. The CA group had lower age (mean 78.9 vs 81.7 years), higher prevalence of paroxysmal AF (73.0 vs 39.0%), higher creatinine clearance (mean 53.1 vs 47.9 mL/min) and lower CHA2DS2-VASc (mean 4.2 vs 4.5) and HAS-BLED scores (mean 1.8 vs 1.9) than the No-CA group. Oral anticoagulants (OACs) were administered in 87.3% of the CA group (warfarin, 16.8%; direct OAC, 70.5%) and 92.9% of the No-CA group (warfarin, 26.4%; direct OAC, 66.5%). Compared with the No-CA group, the CA group had lower the annualized incidences (/100 patient-year [95%confidence intervals]) of stroke/SEE (0.74 [0.52, 0.96] vs 1.72 [1.61, 1.83]), major bleeding (0.63 [0.43, 0.84] vs 1.12 [1.03, 1.21]), ICH (0.49 [0.31, 0.67] vs 0.78 [0.71, 0.86]), HF (2.54 [2.12, 2.96] vs 4.44 [4.26, 4.62]), and all-cause mortality (1.45 [1.14, 1.77] vs 3.95 [3.78, 4.11]). Conclusions Elderly NVAF patients with a history of CA had lower adverse incidences compared with patients without a history of CA. A more optimal OAC therapy for elderly NVAF patients with a history of CA should be examined in the future.

europace

Anticoagulant treatment status and outcomes of elderly non-valvular atrial fibrillation patients with a history of catheter ablation in Japan: subanalysis of the ANAFIE registry