Patients
We reviewed the procedural records of 105 consecutive patients who underwent ablation of idiopathic OTVA between May 2020 and October 2022 at our institutions. After exclusion, we reviewed the records of the remaining 100 patients (48 men, mean age 62.77 ±14.10 years, and 52 women, mean age 60.00 ±13.15 years) who successfully underwent ablation in either the RVOT or LVOT. No evidence of any structural heart disease was observed. Before the procedures, written informed consent was obtained from the patients, and antiarrhythmic drugs were discontinued for at least five half-lives, except for amiodarone. Electrophysiological studies and catheter ablation were performed under local anesthesia.