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Related Experiment Videos

Myopotential interference with a DDD pacemaker--report of a case.

R Quintal, R W Dhurandhar, R K Jain

    Pacing and Clinical Electrophysiology : PACE
    |January 1, 1984
    PubMed
    Summary

    Myopotential interference can disrupt DDD pacemakers, causing rapid ventricular firing or output suppression. Adjusting pacemaker sensitivity and maximum rate partially resolved these issues in a case report.

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    Area of Science:

    • Cardiology
    • Biomedical Engineering
    • Electrophysiology

    Background:

    • Dual-chamber pacemakers (DDD) are crucial for managing bradyarrhythmias.
    • Myopotential interference, stemming from skeletal muscle electrical activity, can affect pacemaker function.
    • Understanding interference mechanisms is vital for device optimization.

    Observation:

    • A patient experienced repetitive ventricular firing (up to 160 bpm) and output suppression with their DDD pacemaker.
    • Electromyopotentials were sensed despite a protective silastic boot on the pacemaker.
    • Interference occurred through both ventricular and atrial channels.

    Findings:

    • Decreasing ventricular channel sensitivity partially mitigated the interference.
    • Programming a lower maximum tracking rate (120 bpm) limited the pacemaker's response to atrial myopotential sensing.

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  • These adjustments indicate successful management of myopotential interference.

    • Implications:

    • This case highlights the potential for myopotential interference in DDD pacemakers.
    • Device programming adjustments can be effective in managing such interference.
    • Further research into lead and device design may be needed to minimize myopotential sensing.