Abstract

Atrial tachycardia (AT) commonly occurs after pulmonary vein isolation (PVI) for atrial fibrillation (AF) treatment. The ligament of Marshall (LOM) reportedly has a critical role as a mechanism of AT after PVI.1 We identified 2 cases of unrecognized left atrial activation patterns of LOM-related AT after PVI that may be misleading and prevent us from achieving correct diagnosis and treatment.

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