Why the study?
When the Contact Index is used with a fixed-loop pulsed field ablation catheter, only odd-numbered electrodes are displayed, making comprehensive assessment of all nine electrodes difficult.
Does a novel jumper-cable signal-duplication modification enable real-time contact index visualization across all 9 electrodes of a fixed-loop pulsed field ablation catheter to guide pulmonary vein isolation in persistent atrial fibrillation?
Does a novel jumper-cable signal-duplication modification enable real-time contact index visualization across all 9 electrodes of a fixed-loop pulsed field ablation catheter to guide pulmonary vein isolation in persistent atrial fibrillation?
A novel jumper-cable signal-duplication method on the EnSite X mapping system allows real-time contact index visualization for all 9 electrodes of a fixed-loop pulsed field ablation catheter, facilitating objective electrode-level tissue contact assessment and acute pulmonary vein isolation.
Answers are grounded in this paper and cite their sources.
Facilitates electrode assessment during fixed-loop PFA; leaves open validation of clinical outcomes and routine adoption.
Adequate electrode–tissue contact is considered important for effective pulsed field ablation (PFA) in patients with atrial fibrillation (AF) using a fixed-loop PFA catheter (PulseSelect PFA Loop catheter, Medtronic, Minneapolis, MN, USA). The Contact Index (CI) in EnSite X Software (Abbott, Abbott Park, IL, USA) helps visualize tissue contact through impedance elevation. (1) However, CI was originally designed for a spline-based PFA catheter (FARAWAVE, Boston Scientific, Marlborough, MA). When applied to a fixed-loop PFA catheter, only odd-numbered electrodes are displayed, making comprehensive assessment of all nine electrodes difficult.
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Ito et al. (2026) studied this question.
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