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Related Experiment Videos

[Phonomechanographic evaluation of left ventricular function in hyperthyroid states].

S Drui, J M Michel, R Faerber

    Archives Des Maladies Du Coeur Et Des Vaisseaux
    |August 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

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    Hyperthyroidism significantly shortens the pre-ejection period, indicating increased left ventricular function. Apex cardiography effectively quantifies these changes in hyperthyroid patients.

    Area of Science:

    • Cardiology
    • Endocrinology
    • Physiology

    Context:

    • Hyperthyroidism presents as a hyperkinetic syndrome with poorly understood mechanisms.
    • Traditional hormonal assays have limitations in assessing cardiac function.
    • Existing methods for evaluating left ventricular systolic function have variable sensitivity.

    Purpose:

    • To investigate the utility of apex cardiography in quantifying left ventricular systolic function in hyperthyroidism.
    • To assess apex cardiographic indices during isovolumetric contraction.
    • To compare these indices between hyperthyroid patients and normal subjects.

    Summary:

    • Fifty-eight hyperthyroid patients (Graves' disease and toxic adenoma) and 36 controls were studied.
    • Apex cardiographic measurements, including systolic time intervals, were analyzed.

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  • The pre-ejection period was significantly shorter in hyperthyroid patients, linked to the chronotropic effect.

    • Impact:

    • Apex cardiography provides a valuable, atraumatic method for assessing left ventricular function in hyperthyroidism.
    • Phonomechanography, using apex cardiography, can quantify functional increases in hyperthyroidism.
    • Findings contribute to understanding the cardiac manifestations of hyperthyroidism.