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Related Experiment Video

Updated: Dec 19, 2025

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction
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Conduction gap mapping of linear ablation lesions with high-density mapping.

Kentaro Nakai1, Asami Kashiwa2, Akira Kunitomi3

  • 1Heart Center, Rhythm Management Division, Uji-Tokushukai Medical Center, Kyoto, Japan.

Journal of Cardiovascular Electrophysiology
|June 8, 2020
PubMed
Summary

High-density mapping effectively identifies electrical conduction gaps after linear ablation. Unipolar mapping, combined with bipolar mapping, improves the detection of these critical gaps in ablation lines.

Keywords:
Rhythmia mapping systematrial fibrillationconduction gaphigh-density mappinglinear ablation

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Area of Science:

  • Electrophysiology
  • Cardiovascular Interventions

Background:

  • Linear ablation is crucial for treating cardiac arrhythmias, but achieving contiguous and transmural lesions is challenging.
  • Identifying electrical conduction gaps within ablation lines is technically difficult, potentially leading to treatment failure.

Purpose of the Study:

  • To evaluate the efficacy of high-density mapping in identifying conduction gaps after linear ablation.
  • To compare the utility of bipolar and unipolar mapping techniques in gap detection.

Main Methods:

  • Conducted a study on patients undergoing linear ablation, analyzing both de novo and previous lesions.
  • Utilized bipolar and unipolar high-density mapping to create propagation maps and identify conduction gaps.
  • Assessed electrogram voltage and morphology at identified gap sites.

Main Results:

  • High-density mapping successfully visualized conduction gaps in linear ablation lesions.
  • Unipolar mapping demonstrated higher sensitivity in detecting gaps compared to bipolar mapping, especially in de novo lesions.
  • Bipolar voltage mapping and electrogram morphology did not significantly enhance gap detection efficacy.

Conclusions:

  • High-density mapping is a valuable tool for visualizing conduction gaps in linear ablation lesions.
  • Unipolar propagation mapping, when used adjunctively with bipolar mapping, enhances the detection of conduction gaps.