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Updated: Aug 29, 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

Ablation of postinfarction ventricular tachycardia guided by isolated diastolic potentials

B Strohmer1, C Hwang

  • 1Department of Cardiology, Landeskliniken Salzburg, Salzburg, Austria. b.strohmer@lks.at

Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology
|February 3, 2004
PubMed

Insights

Recurrent ventricular tachycardia (VT) despite ICD and drug therapy can be treated with catheter ablation. Identifying isolated diastolic potentials (IDPs) during mapping can guide successful radiofrequency ablation, reducing ICD shocks.

Area of Science:

  • Electrophysiology
  • Cardiology
  • Medical Devices

Background:

  • Recurrent ventricular tachycardia (VT) poses a significant challenge, often necessitating catheter ablation when device and drug therapies fail.
  • Implantable cardioverter-defibrillators (ICDs) and antiarrhythmic drugs are standard treatments, but frequent VT recurrences indicate a need for alternative strategies.

Observation:

  • Endocardial mapping identified isolated diastolic potentials (IDPs) during sinus rhythm and VT in a patient with scar-related VT.
  • These IDPs were crucial for VT initiation and maintenance, persisting despite cycle length variations and resetting, suggesting their role in the reentry circuit.

Findings:

  • Radiofrequency (RF) energy applied at the site of IDPs during atrial pacing and VT effectively terminated the arrhythmia.
  • Ablation targeting IDPs led to a significant decrease in ICD therapies for the patient.

Implications:

  • Isolated diastolic potentials are a valuable diagnostic marker for guiding catheter ablation in VT.
  • This approach offers an effective strategy for managing recurrent VT, particularly in scar-related cases, reducing reliance on ICD therapies.

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