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Catecholamines and anxiety

R J Mathew, B T Ho, D J Francis

    Acta Psychiatrica Scandinavica
    |February 1, 1982
    PubMed
    Summary
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    Anxious patients and controls showed similar physiological responses to epinephrine. However, anxious individuals exhibited a correlation between increased heart rate and self-reported anxiety levels post-injection.

    Area of Science:

    • Neuroscience
    • Psychiatry
    • Pharmacology

    Background:

    • Anxiety disorders are common, impacting physiological responses.
    • Understanding the neurobiological underpinnings of anxiety is crucial for effective treatment.

    Purpose of the Study:

    • To investigate the physiological and subjective responses to epinephrine in anxious patients compared to controls.
    • To explore the relationship between catecholamine levels, heart rate, and anxiety.

    Main Methods:

    • Drug-free anxious patients and normal controls received an intramuscular injection of epinephrine.
    • Plasma catecholamines (epinephrine, norepinephrine) and heart rate were measured before and after injection.
    • State anxiety levels were assessed using the State Anxiety Inventory.

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    Main Results:

    • Both groups exhibited significant increases in plasma catecholamines and heart rate post-epinephrine injection.
    • No significant differences were found between anxious patients and controls in catecholamine levels, heart rate, or state anxiety.
    • A significant positive correlation was observed between post-injection heart rate and state anxiety in the anxious group.

    Conclusions:

    • Epinephrine administration elicits comparable physiological responses in anxious patients and healthy controls.
    • Anxiety levels in patients may be associated with heightened heart rate reactivity to epinephrine.
    • Further research is needed to elucidate the specific mechanisms linking anxiety, catecholamines, and cardiovascular responses.