Jin MN, Lim B, Yu HT, et al. - Since a previous report has shown that linear ablation from the superior vena cava to the right atrial septum (SVC-L) within a year following circumferential pulmonary vein isolation (CPVI) is beneficial in patients with paroxysmal atrial fibrillation (AF), researchers assessed the long-term impacts of SVC-L as well as its potential associated mechanisms. In relation to SVC-L vs CPVI alone, a significantly higher mean heart rate and a lower ratio of low/high-frequency components were observed at 2-year follow-up of heart rate variability. According to the findings, significantly improved long-term rhythm outcome was achieved over 2 years following AF catheter ablation in relation to SVC-L ablation in addition to CPVI. The implicated mechanisms involved autonomic modulation and AF organization.