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Related Experiment Videos

Catecholamines in heat stroke.

M S al-Hadramy, F Ali

    Military Medicine
    |May 1, 1989
    PubMed
    Summary
    This summary is machine-generated.

    Heat stroke activates the sympatho-adrenal system, evidenced by elevated plasma norepinephrine and epinephrine levels in patients. This catecholamine surge may impair heat dissipation, contributing to heat stroke

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    Area of Science:

    • Physiology
    • Endocrinology
    • Emergency Medicine

    Background:

    • Heat stroke is a severe condition characterized by hyperthermia.
    • The role of the sympatho-adrenal system in heat stroke pathogenesis is not fully understood.

    Purpose of the Study:

    • To investigate sympatho-adrenal system activation in heat stroke patients.
    • To measure plasma catecholamine levels during heat stroke.

    Main Methods:

    • Plasma norepinephrine (NE) and epinephrine (E) levels were measured using high-performance liquid chromatography.
    • Seven heat stroke patients were studied on admission and six hours later.
    • Control group consisted of 12 healthy subjects.

    Main Results:

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  • On admission, heat stroke patients showed significantly higher plasma NE (1397 +/- 317 pg/ml) and E (257 +/- 55 pg/ml) compared to controls (NE: 328 +/- 62 pg/ml; E: 88 +/- 16 pg/ml).
  • Six hours post-admission, NE and E levels decreased but remained elevated compared to controls.
  • Elevated catecholamine levels indicate sympatho-adrenal system activation.

    • Conclusions:

    • The sympatho-adrenal system is activated in patients experiencing heat stroke.
    • Elevated catecholamines, particularly through alpha-mediated effects, may contribute to impaired heat dissipation and heat stroke development.
    • Further research is warranted to explore the therapeutic implications of this activation.