Background: Radiofrequency(RF) ablation of premature ventricular complexes(PVCs) is a well-established treatment for patients high PVCs burden, even when arising from epicardial/intramural localization. Consistent data about safety of using high power RF is lacking in literature in these regions. Aim: The aim of this study is to investigate safety of different RF power settings, efficacy and outcome of non-endocardial PVCs ablation. Methods: Consecutive patients who underwent PVC ablation were included (2017-2023). We defined “Non-Endocardial Radiofrequency Ablation”(NERA) a procedure in which at least one ablation site has been identified into the cardiac venous system, aortic cusps, inter-leaflet region or pulmonary cusps. Results: Total number of NERA sites was 64 in 53 procedures. In 63% of the procedures, high power (≥40W) and in 60% long duration (≥60 seconds) RF was delivered in at least one site (mean power:37±9W(15-50), mean duration of single RF 88±65 seconds (30-304)). In 21% of the procedures, a combination of both high power and long duration RF applications was performed. Procedural success was achieved in 47 procedures(84%). Only one severe complication (pericardial bleeding) was observed. In 22(39%) procedures, multisite ablation was performed which was associated with procedural failure (OR 7,47;p=0,01). During follow-up, mean and median PVC burden reduction were 69±41% and 96% respectively. Multisite ablation and coronary venous system RF were predictors of recurrence (HR 3.6;p=0.026 and HR 3.85;p=0.014). Conclusion: Ablation from non-endocardial sites is a safe and effective procedure, even using high power and/or long duration RF with clear benefit in terms of PVC burden reduction.