Potential role of body surface ECG mapping for localization of atrial fibrillation trigger sites.

Catheter ablation has revolutionized the clinical management of atrial fibrillation (AF) by offering a curative treatment option for this highly prevalent arrhythmia. Ablation therapy is aimed at electrical isolation of the pulmonary veins (PVs) as a means to prevent rapidly firing focal activation within the PVs from penetrating into the left atrium (LA) and initiate reentrant wavelet propagation. However, non-PV AF trigger sites may be present and lead to unsuccessful ablation or post-ablation AF recurrences.

Clinical and electrophysiologic characteristics of left septal atrial tachycardia.

Objectives: It was the purpose of this study to define the electrophysiologic (EP) identity of left septal atrial tachycardia (AT).

Background: The clinical and EP characteristics of this particular type of arrhythmia have not been fully described.

Methods: A total of 120 patients with AT underwent invasive EP evaluation.