Long term outcome in patients who refused radiofrequency ablation for atrial fibrillation

Abstract Funding Acknowledgements Type of funding sources: None. Introduction Rhythm control is a therapeutic approach to restore sinus rhythm from atrial fibrillation (AF). Current studies have demonstrated efficacy of rhythm control with radiofrequency catheter ablation (RFCA) for survival, however there is lack of data regarding the long term outcome of patients who refused RFCA. Purpose This study was aimed to compare outcomes, consist of death and stroke, in patients who refused RFCA. Method Patients with AF who had been proposed for RFCA but refused and also any rhythm control strategy were enrolled. The primary outcome was all cause death and incidence of stroke, compared with patients with AF who had been treated with RFCA. Results A total 174 patients who refused AF, 175 patients treated with RFCA were enrolled. Median follow up duration was 1125.1 ± 799.0 days. Of refused AF group, 39 (22.3%) were paroxysmal AF at the time of diagnosis. During follow-up, 9 patients in refused RFCA and 11 patients treated with RFCA group had died (4.1% vs 6.1%, p=0.3 by log rank test). Incidence of stroke was significantly higher in patients who refused RFCA, compared with RFCA group (12.0% vs 1.1% , p =0.001 by log-rank test). Cox Regression model showed refusing RFCA was an independent risk factor for the incidence of stroke (Hazard ratio 6.7, 95% Confidence Interval 1.48 – 30.3, p=0.013). Conclusion In AF patient who had refused rhythm control, incidence of stroke was significantly higher in patients who refused RFCA and rhythm control, compared with who had been treated with RFCA. There was no difference in all-cause mortality between two groups.