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Corrosion of pacemaker electrodes.

V Parsonnet, A Villanueva, J Driller

    Pacing and Clinical Electrophysiology : PACE
    |May 1, 1981
    PubMed
    Summary
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    Pacemaker electrode corrosion is microscopic and linked to implant duration and pacemaker DC offset currents. Most corroded electrodes did not cause adverse clinical effects.

    Area of Science:

    • Biomaterials Science
    • Medical Device Engineering
    • Cardiology

    Background:

    • Pacemaker longevity has increased, shifting focus to component durability.
    • Electrode corrosion is an emerging concern in long-term pacemaker function.

    Purpose of the Study:

    • To investigate the prevalence and characteristics of pacemaker electrode corrosion.
    • To correlate corrosion with explantation reasons, pacemaker status, and implant duration.

    Main Methods:

    • Examination of 56 explanted pacemaker electrodes using scanning electron microscopy.
    • Grading corrosion severity using a numerical system.
    • Correlation with explantation data, pacemaker condition, and DC offset currents.

    Main Results:

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    • Microscopic corrosion was observed on nearly all explanted electrodes.
    • Significant corrosion correlated with DC offset currents > 5 microamperes.
    • Corrosion severity increased with longer implantation durations.

    Conclusions:

    • Pacemaker electrode corrosion is common, microscopic, and related to implant duration and electrical factors.
    • Clinical adverse effects were minimal even with significant corrosion.
    • Long-term clinical impact of electrode corrosion remains uncertain.