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Related Experiment Videos

Epinephrine-induced panic attacks and hyperventilation.

G A van Zijderveld1, D J Veltman, R van Dyck

  • 1Department of Psychiatry, Vrije Universiteit, Amsterdam, The Netherlands.

Journal of Psychiatric Research
|March 27, 1999
PubMed
Summary
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Epinephrine infusions can trigger panic attacks in susceptible individuals, indicated by a drop in transcutaneous PCO2 (tcPCO2). This response is linked more to physical anxiety symptoms than fear of sensations, suggesting biological sensitivity.

Area of Science:

  • Psychiatry
  • Neuroscience
  • Cardiology

Background:

  • Panic disorder and social phobia are anxiety disorders.
  • Epinephrine is known to induce panic-like symptoms.
  • Understanding the physiological mechanisms of panic is crucial.

Purpose of the Study:

  • To investigate the effects of epinephrine on ventilation in patients with panic disorder and social phobia.
  • To identify physiological markers associated with epinephrine-induced panic attacks.
  • To differentiate between fear of symptoms and biological sensitivity in panic.

Main Methods:

  • Pooled analysis of data from two previous epinephrine infusion studies.
  • Continuous monitoring of transcutaneous PCO2 (tcPCO2), subjective anxiety, heart rate, and blood pressure.

Related Experiment Videos

  • Comparison of physiological responses between patients who experienced panic attacks and those who did not.

    • Main Results:

    • Forty-five percent of patients receiving epinephrine experienced a panic attack.
    • A significant fall in tcPCO2 and greater cardiovascular response occurred in patients who panicked.
    • The decrease in tcPCO2 was a sensitive, though not clinically significant, index of epinephrine-induced panic.
    • Anxiety-related somatic symptom frequency, not fear of symptoms, predicted the tcPCO2 fall.

    Conclusions:

    • Epinephrine infusion is a valid method to induce panic in susceptible individuals.
    • A decrease in tcPCO2 serves as a sensitive indicator of epinephrine-induced panic.
    • Findings support a biological sensitivity to sympathetic stimulation rather than fear of bodily sensations in panic attacks.