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Related Experiment Video

Updated: Jan 24, 2026

Electrophysiological Assessment of Murine Atria with High-Resolution Optical Mapping
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High-resolution Mapping in Patients with Persistent AF.

Marius Andronache1, Nikola Drca2, Graziana Viola3

  • 1Clermont Ferrand Centre France.

Arrhythmia & Electrophysiology Review
|May 23, 2019
PubMed
Summary

Pulmonary vein isolation (PVI) for atrial fibrillation (AF) can lead to scar tissue, impacting outcomes. Tailoring ablation to this fibrotic substrate may improve patient results.

Keywords:
AFAtrial fibrosiscatheter ablationmultipolar catheterspulmonary vein isolation

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Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Devices

Background:

  • Pulmonary vein isolation (PVI) is a standard treatment for atrial fibrillation (AF).
  • A significant number of patients experience recurrence or poor outcomes after PVI.
  • Scar tissue, identified by contact voltage mapping, is prevalent in AF patients and linked to adverse outcomes.

Purpose of the Study:

  • To investigate the role of scar tissue in PVI outcomes for AF patients.
  • To evaluate the effectiveness of patient-tailored ablation strategies targeting fibrotic substrate.
  • To highlight the importance of advanced cardiac mapping in optimizing ablation procedures.

Main Methods:

  • Utilized contact voltage mapping to identify scar tissue in patients undergoing PVI for AF.
  • Employed multipolar mapping catheters to gather detailed information on tissue status.
  • Developed and applied patient-tailored ablation strategies focusing on low-voltage/fibrotic areas.

Main Results:

  • Scar tissue was frequently observed in patients with both persistent and paroxysmal AF, correlating with poor PVI outcomes.
  • Multipolar mapping provided superior tissue status information compared to standard ablation catheters.
  • Patient-tailored ablation targeting specific fibrotic substrates demonstrated potential for improved outcomes.

Conclusions:

  • Scar tissue significantly impacts the success of PVI for AF.
  • Advanced cardiac mapping with multipolar catheters is crucial for identifying substrate and optimizing ablation strategies.
  • Personalized catheter ablation approaches addressing individual fibrotic patterns offer a promising avenue for enhancing AF treatment efficacy.