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Gas pocket causing pacemaker malfunction

A F Lasala, A Fieldman, D J Diana

    Pacing and Clinical Electrophysiology : PACE
    |March 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

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    Pacemaker malfunction occurred due to air in the generator pocket, increasing impedance and causing lack of capture. Bedside aspiration of the air pocket resolved the issue, restoring normal pacemaker function.

    Area of Science:

    • Cardiovascular Medicine
    • Biomedical Engineering
    • Medical Device Technology

    Background:

    • Pacemaker implantation is a common procedure for managing cardiac arrhythmias.
    • Unipolar pacemaker systems utilize an anodal contact plate for current delivery.
    • Maintaining proper lead-pacemaker contact is crucial for effective device function.

    Observation:

    • A patient experienced pacemaker malfunction, specifically a lack of capture, 20 hours post-implantation.
    • The malfunction was linked to a pocket of air between the unipolar generator's anodal contact plate and the skin.
    • This air pocket increased electrical impedance, hindering effective current flow.

    Findings:

    • The increased impedance caused by the air pocket directly led to the pacemaker's failure to capture the heart.

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  • Bedside aspiration of the air pocket successfully corrected the impedance issue.
  • The pacemaker malfunction was permanently resolved without the need for device revision or replacement.

    • Implications:

    • This case highlights a rare but correctable cause of early pacemaker malfunction.
    • Physicians should consider air pocket formation as a potential cause of impedance-related issues in unipolar pacemakers.
    • Non-invasive bedside management can be effective for specific pacemaker lead-related complications.