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Related Experiment Videos

Breath-holding in panic disorder.

J Zandbergen1, M Strahm, H Pols

  • 1Department of Clinical Psychiatry, State University of Limburg, Maastricht, The Netherlands.

Comprehensive Psychiatry
|January 1, 1992
PubMed
Summary
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Panic disorder (PD) patients showed a trend for shorter breath-holding times compared to other anxiety patients and healthy controls. This suggests altered CO2 tolerance in PD, impacting anxiety responses.

Area of Science:

  • Psychiatry and Psychology
  • Neuroscience
  • Cardiorespiratory Physiology

Background:

  • Previous research indicates exogenous carbon dioxide (CO2) administration triggers significant anxiety in panic disorder (PD) patients.
  • Healthy individuals and patients with other anxiety disorders are less affected by exogenous CO2.
  • Breath-holding is a method to naturally increase endogenous CO2 levels.

Purpose of the Study:

  • To investigate if endogenous CO2 accumulation via breath-holding affects anxiety levels differently across panic disorder patients, other anxiety disorder patients, and healthy controls.
  • To compare breath-holding (apnea) times as a measure of CO2 tolerance in these groups.

Main Methods:

  • A comparative study involving 14 PD patients, 14 patients with other anxiety disorders, and 14 healthy controls.

Related Experiment Videos

  • Participants were instructed to hold their breath for as long as possible.
  • Apnea times and anxiety increases during breath-holding were measured; apnea time ratios before and after hyperventilation were also analyzed.

    • Main Results:

    • Healthy controls exhibited significantly longer apnea times compared to both PD patients and patients with other anxiety disorders.
    • A trend indicated that PD patients had slightly shorter apnea times than patients with other anxiety disorders.
    • No significant differences were observed in the increase of anxiety during breath-holding or in the apnea time ratios post-hyperventilation.

    Conclusions:

    • Breath-holding, as a measure of endogenous CO2 tolerance, may differ between panic disorder patients and other groups.
    • The findings suggest a potential link between CO2 sensitivity and panic disorder, although anxiety responses during the maneuver were similar across patient groups.
    • Further research is warranted to explore the physiological mechanisms underlying altered CO2 tolerance in panic disorder.