Left atrial and pulmonary vein macroreentrant tachycardia associated with double conduction gaps: A novel type of man-made tachycardia after circumferential pulmonary vein isolation

The macroreentrant tachycardia that involves the left atrium (LA) and the pulmonary veins (PVs) after atrial fibrillation (AF) ablation has not been described.To clarify the mechanism and electrophysiological characteristics of this tachycardia.Eight patients presented with recurrent regular tachycardia after the initial procedure, which consisted of two circular linear lesions around the ipsilateral PVs. Clinical tachycardia with a cycle length...