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Related Experiment Videos

Noninvasive His Bundle electrogram: value of three vector lead recordings

R Mehra, G J Kelen, R Zeiler

    The American Journal of Cardiology
    |February 1, 1982
    PubMed
    Summary

    Signal averaging of three simultaneously recorded electrocardiographic potentials (His bundle potential) significantly improved measurement reliability compared to single leads. This three-lead system enhances His bundle potential detection in more patients.

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    Area of Science:

    • Cardiology
    • Electrophysiology
    • Medical Instrumentation

    Background:

    • The His bundle potential is a critical electrophysiological marker.
    • Accurate measurement of the His bundle potential from the body surface can be challenging.
    • Existing single-lead electrocardiographic recordings may not consistently capture this potential.

    Purpose of the Study:

    • To evaluate if signal averaging of three simultaneous electrocardiographic leads (X, Y, Z) improves His bundle potential measurement reliability.
    • To compare the efficacy of a three-lead system against single leads for His bundle potential detection.

    Main Methods:

    • Conducted studies on 45 patients.
    • Simultaneously recorded electrocardiographic potentials from horizontal (X), frontal (Y), and sagittal (Z) axes.

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  • Amplified potentials (250,000x), filtered (80-200 Hz), and performed signal averaging of 1,000 beats.

    • Main Results:

    • The His bundle potential was clearly defined in 25 of 45 patients using single leads (X: 68%, Y: 77%, Z: 44%).
    • No single lead provided satisfactory recordings in all patients.
    • The three-lead system significantly increased the number of patients with definable His bundle potentials compared to the best single lead.

    Conclusions:

    • A simultaneous three-lead electrocardiographic system enhances the reliability of His bundle potential measurements.
    • This multi-lead approach aids in identifying the optimal vectorial lead and validating findings.
    • The three-lead system is superior to single leads for obtaining reliable His bundle electrograms.