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The use of impedance cardiography in heart failure

W N Hubbard, D R Fish, D J McBrien

    International Journal of Cardiology
    |July 1, 1986
    PubMed

    Insights

    Impedance cardiography effectively assessed cardiac failure patients in a hospital setting. Serial recordings objectively measured treatment efficacy, revealing abnormal diastolic waves possibly linked to myocardial dysfunction.

    Area of Science:

    • Cardiology
    • Medical Devices
    • Physiology

    Background:

    • Cardiac failure presents diagnostic challenges in District General Hospitals.
    • Objective monitoring of treatment efficacy is crucial for patient management.
    • Impedance cardiography offers a non-invasive method for hemodynamic assessment.

    Purpose of the Study:

    • To evaluate the suitability of impedance cardiography for cardiac failure patients.
    • To assess the utility of serial impedance cardiography recordings in monitoring treatment response.
    • To identify potential hemodynamic indicators of myocardial dysfunction.

    Main Methods:

    • A 12-month prospective study involving over 200 impedance cardiography recordings from 60 cardiac failure patients.
    • Calculation of stroke volume using the Kubicek formulation.
    • Measurement of cardiac contractility using the Heather Index.

    Main Results:

    • Impedance cardiography proved suitable for studying cardiac failure patients in a hospital environment.
    • Serial recordings provided objective data on treatment efficacy.
    • A majority of patients exhibited an abnormal diastolic O wave.
    • This abnormal wave may signify thoracic blood accumulation due to myocardial dysfunction.

    Conclusions:

    • Impedance cardiography is a valuable tool for assessing cardiac failure and monitoring treatment.
    • The abnormal diastolic O wave is a potential indicator of impaired myocardial function and fluid overload.
    • Further research into the diagnostic significance of the diastolic O wave is warranted.

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