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Related Experiment Videos

Respiratory and psychiatric abnormalities in chronic symptomatic hyperventilation.

C Bass, W N Gardner

    British Medical Journal (Clinical Research Ed.)
    |May 11, 1985
    PubMed
    Summary

    Chronic hypocapnia, a breathing disorder, can occur without anxiety or other organic diseases. Physicians must rule out asthma and pulmonary embolus in patients with unexplained symptoms and this condition.

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    Area of Science:

    • Respiratory Medicine
    • Psychosomatic Medicine

    Background:

    • Physicians often associate hyperventilation syndrome with anxiety or organic diseases like asthma and pulmonary embolus.
    • Unexplained somatic symptoms and chronic hypocapnia (low PCO2) prompt investigation into potential underlying causes.

    Purpose of the Study:

    • To investigate the causes of chronic hypocapnia in patients with unexplained somatic symptoms, challenging the traditional association with anxiety or organic disease.

    Main Methods:

    • Investigated 21 patients with unexplained somatic symptoms and chronic hypocapnia.
    • Performed standard lung function tests, chest radiographs, histamine challenge, allergen skin tests, and ventilation-perfusion scans.
    • Assessed for thyrotoxicosis, cardiovascular abnormalities, and psychiatric disorders.

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    Main Results:

    • Most patients reported difficulty taking a satisfying breath.
    • Lung function tests and chest X-rays were normal; bronchial hyper-reactivity and positive allergen tests were found in a minority.
    • Ventilation-perfusion scans showed abnormalities in some patients.
    • Ten patients had diagnosed psychiatric disorders; the rest had no detectable psychiatric issues but reported more somatic symptoms.

    Conclusions:

    • Severe hyperventilation (chronic hypocapnia) can exist without psychiatric disorders or detectable respiratory/organic abnormalities.
    • It is crucial to specifically exclude asthma and pulmonary embolus in patients presenting with unexplained symptoms and chronic hypocapnia.