Reversible sinus node dysfunction after multiple ablations along the course of sinus nodal artery in patient with paroxysmal atrial fibrillation

A 60-year-old man who had medically refractory paroxysmal atrial fibrillation (PAF) had undergone catheter ablation. Despite the amiodarone usage, there was no sinus pause lasting more than 2 s after termination of PAF. Amiodarone was discontinued for 4 weeks before ablation. After successful isolation of bilateral pulmonary vein antrum and posterior roof line, sustained atrial tachycardia (AT) …