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Characteristics of sighing in panic disorder

Wilhelm, F. H. and Trabert, W. and Roth, W. T.. (2001) Characteristics of sighing in panic disorder. Biological psychiatry, 49 (7). pp. 606-614.

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Abstract

BACKGROUND: Sighs, breaths with larger tidal volumes than surrounding breaths, have been reported as being more frequent in patients with anxiety disorders. METHODS: Sixteen patients with panic disorder, 15 with generalized anxiety disorder, and 19 normal control subjects were asked to sit quietly for 30 min. Respiratory volumes and timing were recorded with inductive plethysmography and expired pCO(2), from nasal prongs. RESULTS: Panic disorder patients sighed more and had tonically lower end-tidal pCO(2)s than control subjects, whereas generalized anxiety disorder patients were intermediate. Sighs defined as <2.0 times the subject mean discriminated groups best. Sigh frequency was more predictive of individual pCO(2) levels than was minute volume. Ensemble averaging of respiratory variables for sequences of breaths surrounding sighs showed no evidence that sighs were triggered by increased pCO(2) or reduced tidal volume in any group. Sigh breaths were larger in panic disorder patients than in control subjects. After sighs, pCO(2) and tidal volume did not return to baseline levels as quickly in panic disorder patients as in control subjects. CONCLUSIONS: Hypocapnia in panic disorder patients is related to sigh frequency. In none of the groups was sighing a homeostatic response. Panic disorder patients show less peripheral chemoreflex gain than control subjects, which would maintain low pCO(2) levels after sighing.
Faculties and Departments:07 Faculty of Psychology
07 Faculty of Psychology > Departement Psychologie > Ehemalige Einheiten Psychologie > Abteilung Klinische Psychologie und Psychiatrie
07 Faculty of Psychology > Departement Psychologie > Ehemalige Einheiten Psychologie > Psychophysiologie (Wilhelm)
UniBasel Contributors:Wilhelm, Frank H
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Elsevier
ISSN:0006-3223
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
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Last Modified:28 Sep 2017 14:56
Deposited On:22 Mar 2012 13:42

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