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Related Experiment Videos

Automated precision current delivery: an alternative method for cardiac defibrillation

D Zimmerman1, F Farkhani, R C Wesley

  • 1Division of Cardiology, Long Beach VA Medical Center, CA 90822.

Pacing and Clinical Electrophysiology : PACE
|April 1, 1994
PubMed
Summary

This study introduces an experimental defibrillator that controls current, not just energy, for more precise defibrillation success prediction. This approach aims to improve outcomes by delivering a consistent current waveform regardless of patient resistance.

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Area of Science:

  • Biomedical Engineering
  • Cardiovascular Devices
  • Electrophysiology

Background:

  • Defibrillation success is better predicted by discharge current than energy.
  • Current defibrillators are calibrated by energy, not current.
  • Load variations affect energy delivery and defibrillation outcomes.

Purpose of the Study:

  • To describe an experimental defibrillator with precisely controlled current output.
  • To present a defibrillator that delivers a consistent current waveform.
  • To discuss techniques for achieving controlled current discharge.

Main Methods:

  • Development of an experimental defibrillator with active current control.
  • Design of a critically damped sinusoidal current waveform.

Related Experiment Videos

  • Independent calibration of current output irrespective of electrode load.

    • Main Results:

    • The experimental defibrillator provides a controlled current discharge.
    • The current waveform mimics the ideal sinusoid of energy-based devices.
    • The device is independent of the load presented by the electrodes.

    Conclusions:

    • Controlled current defibrillators offer a more precise approach to defibrillation.
    • This technology may lead to improved defibrillation efficacy.
    • Further research into operational features and clinical application is warranted.