Abstract
A 60-year-old man with paroxysmal atrial fibrillation (AF) underwent pulmonary vein (PV) isolation. Repeat procedure was performed due to immediate clinical recurrence. None of the previously isolated PVs were found to have reconnected. Adenosine challenge induced a burst of atrial tachycardia (AT) initiating a self-terminating episode of AF ( Panel A ). Based on the 12-lead electrocardiogram (ECG) morphology and after ruling out a left atrial origin, a focus arising from either the superior vena cava (SVC) or the high crista …
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