Successful ablation of non-pulmonary vein triggers of atrial fibrillation using the new cycle length coloring algorithm.

Even though global efforts to treat atrial fibrillation (AF) are ongoing, there is still no definitive strategy for its treatment. Pulmonary vein (PV) isolation via catheter ablation has become the cornerstone strategy for patients with drug-refractory AF [1-2]. However, there are many cases of recurrence after a PV isolation, so the selection of an additional ablation lesion set beyond the PV isolation is the main concern in AF ablation. Non-pulmonary vein (non-PV) triggers are important in the pathogenesis of AF [3-6], and the existence of non-PV triggers is one of the main causes of AF recurrence and a worsening of AF from paroxysmal AF to persistent AF [7-8].