Catheter Ablation of Idiopathic Left Anterior Fascicular Ventricular Arrhythmias: Predicting Origin Sites via Mapping and Electrocardiography

When LAF is anatomically divided into proximal, middle, and distal segments, QRS duration and R/S ratio in Leads V6 and I are available to predict the origin and promote a successful catheter ablation. In addition, combining these three ECG characteristics as a panel can better facilitate the prediction of LAF-VA origin.