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Updated: Oct 14, 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

[Atypical ventricular tachycardia and atrioventricular blockade]

J Pella1, B Stancák, J Bodnár

  • 1II. Katedra internej medicíny Lekárskej fakulty Univerzity Pavia Jozefa Safárika, Kosice.

Vnitrni Lekarstvi
|January 1, 1990
PubMed

Insights

Atypical ventricular tachycardia in patients with advanced atrioventricular block is rare but linked to low potassium and prolonged QT intervals. Drug correction and discontinuation are crucial, as pacing alone may not prevent this tachycardia.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Internal Medicine

Context:

  • Atypical ventricular tachycardia (AVT) is a rare complication in patients with advanced atrioventricular block (AVB).
  • This condition affects approximately 1% of patients with AVB.
  • Identifying risk factors and effective management strategies is crucial for patient outcomes.

Purpose:

  • To analyze the clinical and electrocardiographic features of five patients experiencing AVT with advanced AVB.
  • To investigate the role of serum potassium levels, QT interval, and specific medications in the development of AVT.
  • To evaluate the efficacy of interventions such as drug discontinuation and permanent pacing.

Summary:

  • The study presents five cases of AVT in patients with advanced AVB, noting common findings of hypokalemia and prolonged QT intervals.
  • Two cases were associated with drug use (Furosemide, Thioridazine), and tachycardia persisted despite permanent pacing.
  • Correction of electrolyte imbalances and drug withdrawal were decisive in managing the tachycardia, suggesting prolonged bradycardia may precipitate AVT.

Impact:

  • Highlights the importance of monitoring electrolytes and QT intervals in patients with AVB.
  • Underscores the potential role of certain medications in triggering AVT.
  • Emphasizes that comprehensive management, including drug review and metabolic correction, is essential, potentially offering alternatives or adjuncts to pacing in preventing AVT.

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