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Related Experiment Videos

Transvenous defibrillation lead systems

M R Gold1, S R Shorofsky

  • 1Department of Medicine, University of Maryland, Baltimore, USA.

Journal of Cardiovascular Electrophysiology
|June 1, 1996
PubMed
Summary
This summary is machine-generated.

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Transvenous lead systems for implantable cardioverter defibrillators offer reduced mortality and costs. Biphasic waveforms and active pectoral generators enhance defibrillation efficacy, making them the future standard for new implants.

Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Medical Devices

Background:

  • Implantable cardioverter defibrillator (ICD) use has surged.
  • Transvenous lead systems represent a significant advancement over traditional epicardial leads.
  • These systems aim to improve patient outcomes and reduce healthcare burdens.

Purpose of the Study:

  • To evaluate the efficacy and safety of transvenous lead systems in defibrillation.
  • To compare transvenous leads with epicardial systems.
  • To identify factors influencing defibrillation thresholds and efficacy.

Main Methods:

  • Review of transvenous and epicardial lead system performance.
  • Analysis of sensing capabilities for ventricular tachyarrhythmias.

Related Experiment Videos

  • Assessment of defibrillation thresholds and termination success rates for ventricular tachycardia and fibrillation.
  • Evaluation of pacing strategies (ramp and burst adaptive pacing).

    • Main Results:

    • Transvenous leads decrease perioperative mortality, hospitalization, and costs compared to epicardial leads.
    • While sensing is reliable, ventricular fibrillation redetection can be slow with integrated systems.
    • Ramp and burst adaptive pacing effectively terminate ventricular tachycardia in up to 90% of events.
    • Biphasic waveforms significantly improve defibrillation efficacy, achieving success in ~90% of patients with dual-coil systems.
    • Active pectoral pulse generators simplify implantation and enhance defibrillation efficacy.

    Conclusions:

    • Transvenous lead systems, particularly with biphasic waveforms and active pectoral generators, are highly effective for ICD therapy.
    • These advanced systems are poised to become the standard for new ICD implants.
    • Ongoing research focuses on optimizing lead configurations and waveform technology for improved patient outcomes.