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Related Experiment Videos

Long-term performance of endocardial pacing leads

M E Helguera1, J D Maloney, S L Pinski

  • 1Department of Cardiology, Cleveland Clinic Foundation, Ohio.

Pacing and Clinical Electrophysiology : PACE
|January 1, 1994
PubMed
Summary

This study analyzed 2,611 pacemaker leads, finding high survival rates. Older patients and atrial leads showed fewer structural failures, suggesting improved lead performance with age and placement.

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Area of Science:

  • Cardiology
  • Biomedical Engineering
  • Medical Device Performance

Background:

  • Endocardial pacemaker leads are crucial for cardiac rhythm management.
  • Understanding structural lead failure is vital for improving patient outcomes and device longevity.
  • Previous research has identified various factors influencing lead performance, but comprehensive analysis of long-term structural integrity is ongoing.

Purpose of the Study:

  • To evaluate the long-term performance of endocardial pacemaker leads.
  • To identify specific factors contributing to structural lead failure.
  • To provide data for optimizing pacemaker lead design and implantation strategies.

Main Methods:

  • Retrospective review of medical records for 2,611 endocardial pacing leads implanted between 1980 and 1991.

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  • Analysis of patient demographics, lead characteristics, and reasons for lead discontinuation.
  • Categorization of lead failures into suspected and verified structural failures.
  • Statistical analysis to identify correlations between patient/lead factors and failure rates.

    • Main Results:

    • Cumulative 5- and 10-year lead survival rates were high, reaching 97.4% and 92.9% for suspected failures, and 98.7% and 97.3% for verified failures.
    • Leads implanted in older patients (≥65 years) demonstrated significantly fewer verified structural failures (P=0.014).
    • Leads in the atrial position showed a trend towards fewer verified failures (P=0.007), and unipolar leads also performed better (P=0.07).

    Conclusions:

    • Endocardial pacemaker leads exhibit excellent long-term performance with high survival rates.
    • Patient age and lead position (atrial) are associated with reduced rates of structural lead failure.
    • These findings support the continued use and refinement of endocardial pacing technology.