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Related Experiment Videos

Plasma catecholamines during exercise-induced bronchoconstriction in bronchial asthma

J Zieliński, E Chodosowska, A Radomyski

    Thorax
    |November 1, 1980
    PubMed
    Summary

    Patients with exercise-induced bronchoconstriction (EIB) show elevated adrenaline and noradrenaline levels during and after exercise. These catecholamine changes were significantly different compared to asthmatics without EIB and healthy controls.

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    Area of Science:

    • Exercise Physiology
    • Pulmonary Medicine
    • Endocrinology

    Background:

    • Asthma is a chronic respiratory disease characterized by airway inflammation and hyperresponsiveness.
    • Exercise-induced bronchoconstriction (EIB) is a common symptom in asthma patients.
    • Catecholamines, such as adrenaline and noradrenaline, play a role in the body's response to stress and exercise.

    Purpose of the Study:

    • To investigate plasma catecholamine levels during and after submaximal exercise in patients with bronchial asthma.
    • To compare catecholamine responses in asthmatic patients with and without EIB, and in healthy controls.

    Main Methods:

    • Three groups were studied: 10 patients with EIB, 10 asthmatic patients without EIB, and 4 normal control subjects.
    • Plasma catecholamines (adrenaline and noradrenaline) were measured at rest, end of exercise, and 5 and 15 minutes post-exercise.

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  • Airway resistance was assessed using peak expiratory flow rate.

    • Main Results:

    • Patients with EIB exhibited significantly elevated plasma adrenaline and noradrenaline levels at the end of exercise, persisting into the recovery period.
    • Non-reacting asthmatic patients showed insignificant changes in catecholamine levels.
    • Control subjects demonstrated a significant increase in noradrenaline levels post-exercise.

    Conclusions:

    • Elevated plasma catecholamine levels during and after exercise are associated with exercise-induced bronchoconstriction in asthma.
    • The differential catecholamine response may help distinguish between asthmatic patients with and without EIB.