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Computer-assisted method for performing impedance cardiography calculations

M A Frey

    Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology
    |January 1, 1982
    PubMed
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    Impedance cardiography offers a noninvasive method to track stroke volume beat-by-beat. This technique, along with its associated calculation method, efficiently analyzes cardiac function using recorded data.

    Area of Science:

    • Cardiovascular Physiology
    • Biomedical Engineering

    Background:

    • Impedance cardiography (ICG) is a noninvasive method for monitoring stroke volume.
    • Existing methods for stroke volume measurement have limitations, such as requiring active subject participation or being invasive.

    Purpose of the Study:

    • To present a method for measuring and calculating stroke volume, cardiac output, and ventricular function indices using impedance cardiography.
    • To demonstrate the efficiency of this method for data analysis.

    Main Methods:

    • Utilized impedance cardiography recordings, potentially including electrocardiogram and phonocardiogram.
    • Employed a digitizer, CRT terminal, keyboard, printer, and minicomputer for data acquisition and processing.
    • Calculated stroke volume, cardiac output, and ventricular function indices.

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    Main Results:

    • The described method facilitates the measurement and calculation of key hemodynamic variables.
    • Data from approximately 100 cardiac beats can be analyzed within an hour.
    • ICG shows good correlation with other techniques during rest, exercise, and head-up tilt.

    Conclusions:

    • The presented method provides a comprehensive approach to analyzing cardiac function using impedance cardiography.
    • This technique offers an efficient and noninvasive alternative for hemodynamic monitoring.
    • Impedance cardiography is a versatile tool for cardiovascular research and clinical applications.