Local Impedance for the Optimisation of Radiofrequency Lesion Delivery: a Review of Bench and Clinical Data

Radiofrequency catheter ablation is a cornerstone of treatment for many cardiac arrhythmias. Progression in 3D mapping and contact-force sensing technologies have improved our capability to achieve success, but challenges still remain. In this article, we discuss the importance of overall circuit impedance in radiofrequency lesion formation. This is followed by a review of the literature regarding recently developed “local impedance” technology and its current and future potential applications and limitations, in the context of established surrogate markers currently used to infer effective ablation.

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