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Related Experiment Videos

Interference with function of unipolar pacemaker due to muscle potentials.

S T Anderson, B B Davis

    The Journal of Thoracic and Cardiovascular Surgery
    |May 1, 1976
    PubMed
    Summary
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    Pacemakers sensing muscle potentials can cause issues. Ventricular-inhibited pacemaker sensing of muscle potentials occurred in 69% of patients, with some experiencing symptoms.

    Area of Science:

    • Biomedical Engineering
    • Cardiology
    • Electrophysiology

    Background:

    • Pacemaker sensing of extraneous electrical signals, such as muscle potentials, can lead to inappropriate device inhibition or triggering.
    • Understanding the incidence and implications of muscle potential sensing is crucial for optimizing pacemaker performance and patient outcomes.

    Purpose of the Study:

    • To determine the incidence of muscle potential sensing in patients with unipolar pulse generator systems.
    • To assess the relationship between pacemaker mode (ventricular-inhibited vs. ventricular-synchronous) and muscle potential sensing.
    • To evaluate the symptomatic impact of muscle potential sensing.

    Main Methods:

    • One hundred seventy-three unipolar pulse generator systems were evaluated in 169 patients.

    Related Experiment Videos

  • Assessment focused on 122 implants in the pectoral region.
  • Sensing of muscle potentials was recorded, and patient symptoms were documented.

    • Main Results:

    • Overall, 49% (60 of 122) of assessed implants demonstrated muscle potential sensing.
    • Ventricular-inhibited units showed a higher incidence of muscle potential sensing (69%, 47 of 78) compared to ventricular-synchronous units (30%, 13 of 34).
    • Nine patients with ventricular-inhibited units reported symptoms related to muscle potential sensing; no symptoms were reported in the ventricular-synchronous group.

    Conclusions:

    • Unipolar pulse generators, particularly ventricular-inhibited units, are prone to sensing muscle potentials.
    • Muscle potential sensing can be asymptomatic but may cause symptoms in a significant proportion of patients with ventricular-inhibited devices.
    • Further investigation into lead configurations and sensing algorithms may be warranted to mitigate this issue.