2.1 study population
A total of 15 consecutive patients with persistent AF (n = 6) and long-standing persistent AF (n = 9) that underwent catheter ablation were enrolled in this study. The protocol for this research project has been approved by a suitably constituted Ethics Committee of the institution, and it conforms to the provisions of the Declaration of Helsinki. Committee of 2019.3.1., Approval No. 190017.