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Related Experiment Videos

External vibration interference of activity based rate responsive pacemakers.

J Snoeck1, M Berkhof, M Claeys

  • 1Department of Cardiology, University Hospital Antwerp, Belgium.

Pacing and Clinical Electrophysiology : PACE
|November 1, 1992
PubMed
Summary
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Rate-responsive pacemakers using piezoelectric crystals showed significant pacing rate changes with external vibration interference. Accelerometer-based pacemakers demonstrated less sensitivity to vibrations, indicating better performance in real-world scenarios.

Area of Science:

  • Cardiovascular Engineering
  • Biomedical Device Technology
  • Implantable Electronic Devices

Background:

  • Rate-responsive pacemakers adjust pacing rate based on physiological demand.
  • External vibration can interfere with pacemaker function, potentially causing inappropriate rate changes.
  • Understanding sensor interference is crucial for pacemaker reliability.

Purpose of the Study:

  • To evaluate the response of different rate-responsive pacemaker sensors to external vibration.
  • To compare the performance of piezoelectric crystal and accelerometer-based pacemakers under vibration stress.
  • To determine the impact of vibration frequency and amplitude on pacemaker pacing rate.

Main Methods:

  • Laboratory-based in vitro testing of five rate-responsive pacemakers (four piezoelectric, one accelerometer).

Related Experiment Videos

  • Simulated external vibration using a controlled sinusoidal vibration force.
  • Application of varying amplitude and frequency vibration forces.
  • Acquisition of pacing rate data in response to vibration parameters.

    • Main Results:

    • High vibration forces and low frequencies elicited the greatest pacing rate responses in tested pacemakers.
    • Pacemakers with piezoelectric crystal sensors exhibited significant rate changes.
    • The accelerometer-based pacemaker showed reduced sensitivity to high-frequency vibrations and appropriate response in the lower frequency range.

    Conclusions:

    • Piezoelectric crystal sensors in rate-responsive pacemakers are susceptible to external vibration interference.
    • Accelerometer-based pacemakers demonstrate superior performance by being less sensitive to environmental vibrations.
    • Accelerometer technology offers a more reliable solution for rate-responsive pacing, distinguishing true physiological signals from interference.