Abstract
Catheter ablation is the preferred treatment option for idiopathic ventricular arrhythmias (VAs).1 Refinements in mapping and ablation technologies have led to a marked improvement in success rates of catheter ablation. Despite these improvements, VAs arising from specific anatomical locations such as the left ventricular summit (LVS) and the interventricular septum pose specific challenges to mapping and delivery of radiofrequency (RF) energy. A major obstacle in treating VAs from these sites is the inaccessibility of mapping from the endocardium or epicardium or the presence of intramural substrate that is challenging to record and target efficiently with standard techniques.
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