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Externally induced irreversible runaway pacemaker.

L M Van Gelder, M I El Gamal

    Pacing and Clinical Electrophysiology : PACE
    |September 1, 1981
    PubMed
    Summary
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    A pacemaker unexpectedly malfunctioned at a high rate during a routine check, causing complete loss of capture. Emergency replacement restored effective pacing, marking the first reported case of externally induced runaway pacemaker.

    Area of Science:

    • Cardiology
    • Biomedical Engineering
    • Medical Device Technology

    Background:

    • Implanted pacemakers are crucial for managing bradycardia.
    • Routine follow-up ensures optimal device function and patient safety.
    • Pacemaker malfunction, though rare, can have serious clinical consequences.

    Observation:

    • A Vitatron VA 1000 pacemaker analyzer identified a Vitatron ventricular demand pulse generator firing at an extreme rate of 1200 pulses per minute.
    • This rapid firing led to complete loss of capture, meaning the pacemaker's electrical impulses were not effectively stimulating the heart.
    • The patient remained asymptomatic due to a robust intrinsic heart rate of 50 beats per minute.

    Findings:

    • The pacemaker exhibited an irreversible runaway pacing behavior, firing at an excessively high rate.

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  • External interference from the Vitatron VA 1000 pacemaker analyzer was rigorously excluded as the cause.
  • This represents the first documented instance of an externally induced, irreversible runaway pacemaker event.

    • Implications:

    • Highlights the critical need for advanced diagnostic tools during pacemaker follow-up.
    • Underscores potential risks associated with pacemaker-analyzer interactions.
    • Necessitates further investigation into the mechanisms of externally induced pacemaker malfunction to prevent future occurrences.