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Hyperventilation-induced panic attacks in panic disorder with agoraphobia.

R J Maddock1, C S Carter

  • 1Department of Psychiatry, University of California, Davis, School of Medicine.

Biological Psychiatry
|May 1, 1991
PubMed
Summary
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Hyperventilation triggers panic attacks in most patients with panic disorder with agoraphobia. These patients also experience more severe symptoms and slower recovery, suggesting hyperventilation challenges can identify those prone to panic.

Area of Science:

  • Psychiatry
  • Neuroscience
  • Psychology

Background:

  • Panic disorder with agoraphobia is a debilitating condition.
  • Understanding panic attack triggers is crucial for effective treatment.

Purpose of the Study:

  • To investigate the efficacy of hyperventilation as a panic attack inducer.
  • To compare responses to hyperventilation in patients with panic disorder and healthy controls.

Main Methods:

  • Eight minutes of hyperventilation to an end-tidal PCO2 < 20 mmHg.
  • Assessing panic attack incidence and symptom severity.
  • Monitoring recovery of normocapnia.

Main Results:

  • Panic attacks occurred in 7/12 patients with panic disorder with agoraphobia vs. 1/12 controls.

Related Experiment Videos

  • Patients reported greater panic symptom increases and delayed normocapnia recovery.
  • Preceding distress from somatic symptoms predicted panic during hyperventilation.

    • Conclusions:

    • Hyperventilation is an effective laboratory method for inducing panic attacks.
    • This challenge may identify patients with panic disorder where hyperventilation is a frequent panic trigger.