Related Experiment Video
Updated: Jun 22, 2026

Investigation into Deep Breathing through Measurement of Ventilatory Parameters and Observation of Breathing Patterns
Published on: September 16, 2019
Respiratory patterns in panic disorder reviewed: a focus on biological challenge tests
V Niccolai1, M A van Duinen, E J Griez
1School of Mental Health and Neurosciences, Maastricht University, 6200 AB, Maastricht, the Netherlands.
Individuals with panic disorder (PD) exhibit altered breathing patterns, including lower carbon dioxide levels and increased tidal and minute volumes. Notably, heightened respiratory variability may serve as a biological marker for PD, indicating disrupted respiratory control.
Area of Science:
- Psychiatry
- Respiratory Medicine
- Neuroscience
Background:
- Panic disorder (PD) is characterized by recurrent, unexpected panic attacks.
- Breathing abnormalities are frequently reported in individuals with PD.
- Understanding respiratory patterns in PD is crucial for identifying underlying mechanisms.
Purpose of the Study:
- To systematically review studies on respiration in panic disorder.
- To identify consistent and inconsistent findings regarding respiratory function in PD.
- To explore the potential of respiratory patterns as biomarkers for PD.
Main Methods:
- Systematic literature search of Medline for controlled studies on respiration in PD.
- Analysis of parameters including pCO(2), respiratory rate, tidal volume, and minute volume.
- Examination of respiratory variability and comparisons between PD patients and controls.
Main Results:
- Consistently lower pCO(2) levels observed in PD subjects across all phases (baseline, challenge, recovery).
- Elevated tidal volume and minute volume in PD subjects during baseline conditions.
- Significantly higher respiratory variability identified as a robust finding in PD patients.
Conclusions:
- Increased respiratory variability may serve as a potential biological marker for panic disorder.
- Abnormal breathing patterns in PD suggest instability in respiratory homeostasis.
- Respiratory variability offers insights into the etiopathological pathways of PD.
Related Concept Videos
Panic Disorder
Alterations in Respiration II
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes include...
Physical Assessment of the Respiratory Tract II: Inspection
Chest Configuration
The chest configuration can...
Respiratory Volumes and Capacities I
Assessment of Ventilation II: Respiratory Depth and Rhythm
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
Acute Respiratory Failure-IV

