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Single-incision and single-element array electrode to lower the defibrillation threshold

V Kühlkamp1, K Khalighi, V Dörnberger

  • 1Medical Department III, Eberhard-Karls-University, Tübingen, Germany. volker.kuehlkamp@uni-tuebingen.de

The Annals of Thoracic Surgery
|November 14, 1997
PubMed
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A novel subcutaneous array electrode effectively reduced high defibrillation energy requirements in patients with implantable cardioverter-defibrillators. This approach offers a potential solution for individuals with excessive defibrillation thresholds.

Area of Science:

  • Cardiovascular medicine
  • Electrophysiology
  • Medical device technology

Background:

  • High defibrillation energy requirements can complicate implantable cardioverter-defibrillator (ICD) therapy.
  • Standard transvenous lead placement and biphasic shock waveforms may not always suffice for effective defibrillation.

Observation:

  • Two patients presented with excessive defibrillation energy needs despite optimal transvenous lead positioning and biphasic shock use.
  • A single-element subcutaneous array electrode was surgically implanted in these patients.

Findings:

  • The subcutaneous array electrode was implanted via the existing infraclavicular incision used for the transvenous lead.
  • In one patient, the defibrillation threshold decreased from 30 Joules (J) to 15 J.
  • In the second patient, the defibrillation threshold decreased from 24 J to 9 J.

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Implications:

  • Subcutaneous array electrodes represent a promising adjunctive therapy for managing high defibrillation thresholds.
  • This technique may improve the efficacy and safety of defibrillation in challenging patient cases.
  • Further research is warranted to evaluate the long-term performance and broader applicability of subcutaneous array electrodes.