Assessment of the Interelectrode Distance Effect over the Omnipole with High Multielectrode Arrays

Area of Science:

• Cardiac Electrophysiology
• Biomedical Engineering
• Signal Processing

Background:

• High-density multielectrode catheters have revolutionized cardiac electrophysiology mapping.
• Omnipolar reconstruction offers improved reliability and orientation independence for electrogram (EGM) signals.

Purpose of the Study:

• To evaluate the impact of inter-electrode distance on omnipolar EGM reconstruction quality.
• To compare different electrode configurations for signal fidelity.

Main Methods:

• Recordings using a high-density epicardial multielectrode catheter in perfused rabbit hearts.
• Analysis of inter-electrode distances from 1 to 4 mm.
• Computation of bipolar loop areas and omnipolar amplitudes as robustness biomarkers.

Main Results:

• Increased inter-electrode distance led to larger bipolar loop areas and higher omnipolar amplitudes.
• Results support the hypothesis that shorter distances yield more robust electrograms.
• Findings indicate distance influences EGM reconstruction accuracy.

Conclusions:

• Inter-electrode distance is a critical factor in high-density mapping for accurate EGM reconstruction.
• The cross-omnipolar method benefits from distance-dependent insights for wavefront propagation estimation.
• Results offer valuable guidance for clinical electrophysiology laboratories using advanced catheter technology.