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Evaluation of a rechargeable pacemaker system

S H Stertzer, N P DePasquale, L J Cohn

    Pacing and Clinical Electrophysiology : PACE
    |April 1, 1978
    PubMed
    Summary
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    Rechargeable nickel-cadmium pacemakers showed a 3% annual failure rate. Difficulty with recharging and inconvenience limit their use compared to modern lithium-powered devices.

    Area of Science:

    • Cardiology
    • Biomedical Engineering

    Background:

    • Permanent transvenous cardiac pacing is crucial for managing bradyarrhythmias.
    • Early pacing systems relied on non-rechargeable batteries, necessitating frequent replacement surgeries.

    Purpose of the Study:

    • To evaluate the long-term performance and reliability of a rechargeable-demand nickel-cadmium pulse generator for cardiac pacing.
    • To assess patient acceptance and identify failure modes associated with this rechargeable pacing technology.

    Main Methods:

    • A cohort of 66 patients received permanent transvenous cardiac pacing with a rechargeable nickel-cadmium pulse generator.
    • The study involved a cumulative follow-up of 2,333 patient-months (194.4 patient-years).
    • Data collection focused on pacing circuit failures, recharging issues, and patient compliance.

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    Main Results:

    • The pacing circuit failed in 3 patients between 21 and 27 months post-implantation.
    • Nine patients experienced difficulties with the recharging process, leading to generator replacement in 3 instances.
    • The overall system failure rate, including recharging issues, was approximately 3% per year.

    Conclusions:

    • Rechargeable nickel-cadmium pulse generators demonstrated a significant annual failure rate, impacting long-term reliability.
    • Challenges with patient acceptance and the inconvenience of recharging limit the clinical utility of this system.
    • The development of newer, more convenient power sources like lithium-powered generators offers a superior alternative for permanent cardiac pacing.