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Related Experiment Videos

Antitachycardia pacing: which patients and which methods?

M Rosenqvist1

  • 1Department of Cardiology, Karolinska Hospital, Stockholm, Sweden.

The American Journal of Cardiology
|September 12, 1996
PubMed
Summary

Antitachycardia pacing effectively terminates ventricular tachycardia in implantable cardioverter-defibrillator patients. Algorithm choice and programming may have limited impact on efficacy, requiring further study.

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Efficacy of primary preventive ICD therapy in an unselected population of patients with reduced left ventricular ejection fraction.

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·2014

Area of Science:

  • Cardiology
  • Electrophysiology
  • Medical Devices

Background:

  • Implantable cardioverter-defibrillators (ICDs) are crucial for managing life-threatening arrhythmias.
  • Antitachycardia pacing (ATP) is a key feature within ICDs for terminating tachyarrhythmias.
  • The efficacy and optimal programming of ATP remain areas of active investigation.

Purpose of the Study:

  • To review the current value and effectiveness of antitachycardia pacing in patients with ICDs.
  • To assess the impact of different ATP algorithms on termination of ventricular tachycardia.
  • To evaluate the role of ATP in patients with non-inducible ventricular tachycardia and the issue of inappropriate therapy.

Main Methods:

  • This is a review article, synthesizing existing research and clinical data.
  • Analysis of success rates for ATP in terminating monomorphic ventricular tachycardias.
  • Discussion of the relevance of spontaneous versus induced ventricular tachycardia episodes for ATP efficacy.
  • Examination of reported rates and causes of inappropriate ICD therapy related to ATP.

Main Results:

  • Antitachycardia pacing demonstrates high efficacy (80-90%) in terminating monomorphic ventricular tachycardias.
  • The specific algorithm used for ATP termination appears to have minimal impact on efficacy and safety.
  • Spontaneous ventricular tachycardia episodes are generally easier to convert than those induced during electrophysiology studies.
  • Inappropriate therapies, often triggered by supraventricular arrhythmias, affect up to 25% of patients, necessitating improved differentiation algorithms.

Conclusions:

  • Antitachycardia pacing is a highly effective tool for managing ventricular tachycardia in ICD patients.
  • Fine-tuning ATP algorithms based on induced arrhythmias may offer limited clinical benefit for spontaneous events.
  • ATP should be considered even in patients with non-inducible ventricular tachycardia.
  • Further prospective studies are needed to validate ATP efficacy and improve algorithms for differentiating supraventricular from ventricular tachycardias to reduce inappropriate shocks.

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