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Related Experiment Video

Updated: Jun 23, 2026

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction
06:57

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction

Published on: January 31, 2019

Open-Window Mapping for Accessory Pathway Ablation: Influence of Catheter Design on Mapping Performance.

Kazuma Iimura1, Atsuhiko Yagishita1, Aika Iijima1

  • 1Department of Cardiology Tokai University School of Medicine Isehara Japan.

Journal of Arrhythmia
|June 22, 2026
PubMed
Summary

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An 8-spline catheter significantly improves mapping efficiency and first-pass success rates during open-window mapping (OWM) for accessory pathway (AP) ablation compared to 5-spline catheters. This suggests catheter design impacts OWM procedural outcomes.

Area of Science:

  • Electrophysiology
  • Cardiovascular Interventions

Background:

  • Open-window mapping (OWM) with the extended early-meets-late (EEML) algorithm is standard for accessory pathway (AP) localization.
  • The influence of catheter design on OWM performance and ablation outcomes is not well-established.

Purpose of the Study:

  • To evaluate the impact of catheter design on mapping efficiency and procedural success in OWM-guided AP ablation.

Main Methods:

  • Retrospective analysis of 43 patients undergoing OWM-guided AP ablation.
  • Comparison of mapping characteristics and ablation outcomes between patients mapped with an 8-spline high-density catheter (n=24) and a conventional 5-spline catheter (n=19).

Main Results:

  • The 8-spline catheter yielded higher mapping density and shorter mapping times (p<0.001).
Keywords:
Wolff–Parkinson–White syndromeaccessory pathwayscatheter ablationopen‐window mapping

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Last Updated: Jun 23, 2026

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction
06:57

Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction

Published on: January 31, 2019

Remote Magnetic Navigation for Accurate, Real-time Catheter Positioning and Ablation in Cardiac Electrophysiology Procedures
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Remote Magnetic Navigation for Accurate, Real-time Catheter Positioning and Ablation in Cardiac Electrophysiology Procedures

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  • Narrower AP gap width and lower EEML thresholds were observed with the 8-spline catheter (p=0.023 and p=0.003, respectively).
  • First-pass AP elimination was 100% with the 8-spline catheter versus 68% with the 5-spline catheter (p=0.004), requiring fewer RF applications (p=0.048).

    • Conclusions:

    • An 8-spline high-density catheter enhances mapping efficiency and first-pass ablation success in OWM procedures.
    • Catheter design is a critical factor influencing procedural performance for OWM-guided AP ablation.