What question did this study set out to answer?

To develop and assess a new technique for real-time contact mapping using a circular multielectrode catheter for PFA.

March 1, 2026Open Access

Novel Impedance-Guided Contact Mapping Technique for the Circular Multielectrode Pulsed-Field Ablation Catheter.

Key Result

Impedance-guided PulseSelect contact mapping enabled real-time electrode-tissue contact visualization and achieved acute pulmonary vein isolation without complications in three AF cases.

Key Points

To develop and assess a new technique for real-time contact mapping using a circular multielectrode catheter for PFA.
Implemented impedance-guided mapping via i-Pulse technique.
Used EnSite X Contact Index for evaluation.
Conducted applications in three cases of atrial fibrillation with ICE guidance.
Achieved acute pulmonary vein isolation in all cases.
Identified adequate electrode-tissue contact with Δimpedance > 5%.
No complications reported during the procedure.

Structured PICO

Does impedance-guided contact mapping for a circular multielectrode PFA catheter enable adequate tissue contact and acute pulmonary vein isolation in patients with atrial fibrillation?

Population

3 patients with atrial fibrillation

Intervention

Impedance-guided PulseSelect contact mapping (i-Pulse) adapting EnSite X Contact Index for a circular multielectrode pulsed-field ablation (PFA) catheter with intracardiac echocardiography (ICE) guidance

Outcome

Acute pulmonary vein isolation and procedural complicationssurrogate

A novel impedance-guided contact mapping technique for circular multielectrode PFA catheters is feasible for achieving acute pulmonary vein isolation without fluoroscopy.

Main Result

Absolute Event Rate: 0% vs 0%

Abstract

Impedance-guided PulseSelect contact mapping (i-Pulse) adapts EnSite X Contact Index for a circular multielectrode PFA catheter, enabling real-time visualization of electrode-tissue contact without fluoroscopy. With ICE guidance, Δimpedance > 5% identified adequate contact, standardized tagging, and guided applications in three atrial fibrillation cases, achieving acute pulmonary vein isolation without complications.