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Related Experiment Video

Updated: May 18, 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

Intraseptal Mapping of Premature Ventricular Complexes Using Multipolar Catheters.

Haran Yogasundaram1, Adrian M Petzl2, Corentin Chaumont2

  • 1University of Alberta, Faculty of Medicine, Division of Cardiology, Edmonton, Alberta, Canada; Mazankowski Alberta Heart Institute, Edmonton, Alberta, Canada.

JACC. Clinical Electrophysiology
|May 16, 2026
PubMed
Summary
This summary is machine-generated.

Intraseptal mapping with multipolar catheters effectively ablates left ventricular outflow tract premature ventricular complexes (PVCs). This method accurately identifies the site of origin (SOO) and offers high success rates for patients with idiopathic PVCs.

Keywords:
catheter ablationintramyocardialmultipolar mappingpremature ventricular complexesseptal

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Last Updated: May 18, 2026

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

Published on: April 21, 2013

Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Devices

Background:

  • Intramyocardial mapping of left ventricular outflow tract (LVOT) premature ventricular complexes (PVCs) aids in defining the site of origin (SOO) and guiding ablation.
  • Multipolar mapping catheters overcome limitations of unipolar signals in wire mapping for LVOT PVCs.

Purpose of the Study:

  • To report the mapping and ablation experience of suspected LVOT PVCs using intraseptal mapping with multipolar catheters.
  • To evaluate the feasibility and effectiveness of this technique.

Main Methods:

  • Intraseptal mapping using multipolar catheters was performed in patients with suspected LVOT PVCs.
  • V2 S-wave and R-wave pattern break (PB) ratios were calculated to predict the SOO.
  • SOO was determined based on activation patterns (endocardial, intramyocardial, or epicardial).

Main Results:

  • Successful mapping was achieved in 70% of patients, with PVCs most commonly originating from an intramyocardial source.
  • Specific V2 PB ratios predicted the SOO for different PVC morphologies.
  • Acute ablation success was 98%, with 93% freedom from recurrence at 12.4 months follow-up.

Conclusions:

  • Intraseptal mapping with multipolar catheters is a feasible and highly effective method for ablating LVOT PVCs.
  • ECG predictors can identify suitable candidates for intraseptal mapping.
  • Reversal of late potentials during PVCs may indicate abnormal substrate in idiopathic PVCs.