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Related Experiment Videos

Clinical evaluation of His-bundle electrogram recorded from the body surface

P J de Feyter, H H Ros, P A Majid

    Clinical Cardiology
    |March 1, 1981
    PubMed
    Summary

    A new noninvasive method accurately records His-bundle activity and measures the His-bundle-ventricular (H-V) interval. This bedside technique is reproducible and beneficial for analyzing cardiac conduction disturbances.

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    Area of Science:

    • Cardiology
    • Biomedical Engineering
    • Electrophysiology

    Background:

    • Assessing cardiac conduction abnormalities often requires invasive methods.
    • His-bundle recording is crucial for understanding heart rhythm disturbances.

    Purpose of the Study:

    • To develop and validate a noninvasive method for recording His-bundle activity.
    • To measure the His-bundle-ventricular (H-V) interval noninvasively.

    Main Methods:

    • Utilized high-gain amplification, noise filtering, and signal averaging over 200-500 cardiac cycles.
    • Validated the noninvasive technique against the intracardiac electrode method.
    • Assessed reproducibility in normal subjects and patients.

    Main Results:

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    • Successfully demonstrated external His-bundle activity and measured H-V intervals in 60% of patients.
    • External H-V interval measurements showed a 4.5% variation in normal subjects.
    • Successful recording correlated with PR segment length; possible in all patients with PR > 100 ms.

    Conclusions:

    • The noninvasive His-bundle recording technique is simple, reproducible, and suitable for bedside use.
    • Offers advantages over invasive methods for sequential patient studies.
    • Currently best suited for analyzing cardiac conduction disturbances.