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Related Experiment Videos

Tip surface changes in endocardial stimulation electrode, visualised by scanning electron microscopy.

M Hladky, V Horn, P Kamaryt

    Cor Et Vasa
    |January 1, 1975
    PubMed
    Summary
    This summary is machine-generated.

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    Scanning electron microscopy revealed surface changes on used endocardial stimulating electrode tips. These alterations correlated with decreased conductivity, impacting device performance.

    Area of Science:

    • Materials Science
    • Biomedical Engineering
    • Electrophysiology

    Background:

    • Endocardial stimulating electrodes are crucial for cardiac pacing.
    • Understanding long-term surface changes is vital for device longevity and efficacy.
    • Previous studies have not utilized scanning electron microscopy for electrode tip surface analysis.

    Purpose of the Study:

    • To investigate surface alterations on a platiniridium-tipped endocardial stimulating electrode after prolonged use.
    • To correlate observed surface changes with electrical conductivity properties.

    Main Methods:

    • Application of scanning electron microscopy (SEM) to analyze electrode tip surfaces.
    • Comparison of a used electrode (approx. 4 years) with an unused control electrode.

    Related Experiment Videos

  • Evaluation of secondary electron emission to assess surface conductivity.

    • Main Results:

    • SEM revealed significant surface changes on the used platiniridium electrode tip.
    • The used electrode exhibited lowered conductivity for secondary electron emission compared to the unused electrode.
    • Specific morphological changes on the used electrode surface were documented.

    Conclusions:

    • Prolonged use of endocardial stimulating electrodes leads to detectable surface modifications.
    • These surface changes can negatively impact the electrode's electrical conductivity.
    • SEM is a valuable tool for characterizing the degradation of implantable electronic device components.