Risks Associated with Extensive Left Atrial Ablation

A 56-year-old man with 3 prior left atrial ablations for atrial fibrillation was referred for ablation for recurrent paroxysmal atrial fibrillation. A spontaneous premature atrial depolarization occurred when the ring catheter was positioned in the left inferior pulmonary vein and a decapolar catheter was in the coronary sinus. Caution should be used with further...