Limitations
Our study has several limitations. It is a single-center, non-randomized, retrospective study. Given the study’s retrospective nature, there could be a possibility of selection bias. In addition, the lack of continuous ECG monitoring after ablation could have resulted in the underestimation of arrhythmia recurrence. Use of electronic health records to document the recurrence of arrhythmia and complications could result in under-reporting of both. Ablation strategies were significantly different between the two groups. Lastly, we acknowledge that amiodarone therapy is not routinely indicated in the PAF patients; early rhythm control using catheter ablation is now common, so the PAF cohort in our study may be considered a unique study population.