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Related Experiment Videos

ICD-antiarrhythmic drug and ICD-pacemaker interactions

S E Brode1, D Schwartzman, D J Callans

  • 1Clinical Electrophysiology Laboratory, Allegheny University School of the Health Sciences, Philadelphia, Pennsylvania, USA.

Journal of Cardiovascular Electrophysiology
|July 1, 1997
PubMed
Summary

Antiarrhythmic drugs can increase defibrillation thresholds and affect pacemaker interactions in patients with implantable cardioverter-defibrillators (ICDs). These drug effects and device interactions require careful consideration for optimal patient therapy.

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Area of Science:

  • Cardiology
  • Biomedical Engineering

Background:

  • Implantable cardioverter-defibrillators (ICDs) are commonly used with antiarrhythmic drugs and pacemakers.
  • Previous research on drug effects on defibrillation thresholds (DFTs) used animal models and older technology.
  • Clinical data on antiarrhythmic drug effects on modern ICD systems are limited.

Purpose of the Study:

  • To assess the impact of antiarrhythmic drugs on defibrillation thresholds (DFTs) in patients with ICDs.
  • To evaluate interactions between ICDs, pacemakers, and antiarrhythmic drugs.
  • To understand how these interactions affect device function and patient safety.

Main Methods:

  • Review of existing literature on antiarrhythmic drugs and ICD/pacemaker interactions.
  • Analysis of studies involving animal models and human patients.

Related Experiment Videos

  • Consideration of different defibrillation waveforms and lead systems.

    • Main Results:

    • Chronic amiodarone administration appears to significantly increase DFT.
    • Antiarrhythmic drugs can alter antitachycardia pacing and tachycardia sensing.
    • ICD shocks can transiently affect pacemaker function (sensing, pacing, reprogramming).
    • Pacemaker function may lead to ICD oversensing or undersensing, impacting therapy delivery.
    • Undersensing of ventricular fibrillation by current ICDs is considered unlikely.

    Conclusions:

    • Antiarrhythmic drugs, particularly amiodarone, can increase DFT in patients with ICDs.
    • Interactions between ICDs, pacemakers, and antiarrhythmic drugs can affect device performance.
    • Careful patient management is needed to mitigate risks associated with these combined therapies.