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Catecholamine sensitivity in hyperthyroidism and hypothyroidism

D G McDevitt, J G Riddell, D R Hadden

    British Journal of Clinical Pharmacology
    |October 1, 1978
    PubMed
    Summary
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    Thyroid dysfunction does not alter catecholamine sensitivity. Studies show heart rate responses to isoprenaline remain unchanged in hyperthyroidism and hypothyroidism, refuting hypersensitivity in thyroid disorders.

    Area of Science:

    • Endocrinology
    • Cardiovascular Physiology

    Background:

    • Thyroid hormones significantly influence cardiovascular function.
    • Catecholamines play a crucial role in regulating heart rate and blood pressure.
    • Altered catecholamine sensitivity is suspected in thyroid dysfunction.

    Purpose of the Study:

    • To investigate catecholamine sensitivity in patients with hyperthyroidism and hypothyroidism.
    • To determine if thyroid dysfunction alters cardiovascular responses to catecholamines.

    Main Methods:

    • A standardized isoprenaline sensitivity test was employed.
    • Seven hyperthyroid and seven hypothyroid patients were tested in both dysfunctional and euthyroid states.

    Main Results:

    • No significant differences in heart rate response to isoprenaline were observed between dysfunctional and euthyroid states.

    Related Experiment Videos

  • Isoprenaline sensitivity remained consistent across hyperthyroid, hypothyroid, and euthyroid conditions.

    • Conclusions:

    • Catecholamine sensitivity is not altered in thyroid dysfunction.
    • Hypersensitivity to catecholamines does not occur in spontaneous hyperthyroidism.