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Accelerated Implantable Defibrillator Battery Depletion Secondary to Lithium Cluster Formation: A Case Series

Ashim Aggarwal1, Joseph J Sarmiento1, David R Charles1

  • 1Department of Cardiology, University of Illinois College of Medicine at Peoria, Peoria, Illinois.

Pacing and Clinical Electrophysiology : PACE
|December 30, 2015
PubMed

Insights

Sudden implantable defibrillator battery depletion, though rare, can be fatal. This study identifies lithium cluster formation as a cause of short circuits and rapid battery drain in St. Jude devices.

Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Materials Science

Background:

  • Implantable defibrillators are critical for managing life-threatening arrhythmias.
  • Device failure due to unexpected battery depletion poses a significant clinical risk.
  • Previous literature has documented various mechanisms of implantable defibrillator battery failure.

Observation:

  • This case series reports on four patients with St. Jude implantable defibrillators experiencing premature battery depletion.
  • The observed battery failures were linked to the formation of lithium clusters within the battery.
  • Lithium cluster formation led to internal short circuits and accelerated battery current drain.

Findings:

  • Lithium cluster formation is identified as a novel mechanism for early battery depletion in St. Jude implantable defibrillators.
  • This phenomenon results in a short circuit, causing a high current drain.
  • The study presents the largest cohort to date describing this specific failure mode.

Implications:

  • Clinicians should be aware of lithium cluster formation as a potential cause of device malfunction.
  • Further research is necessary to establish the true prevalence of this battery failure mechanism.
  • Understanding this failure mode may lead to improved device design and patient safety.
Abstract

Keywords:
ICDbattery drainagelithium cluster

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