To the Editor--Interatrial block: Another risk to take into account after radiofrequency ablation of typical atrial flutter.

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[4]  Adrian Baranchuk,et al.  Prolonged P-wave duration is associated with atrial fibrillation recurrence after successful pulmonary vein isolation for paroxysmal atrial fibrillation , 2014, Journal of Interventional Cardiac Electrophysiology.

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