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Subjective Symptom sand Breathing Pattern at Restand Following Hyperventilation in Anxiety and Somatoform disorder.

新疆医科大学学报 1999年第2期 94-94页

作者： J.N.Han, * K.Stegen, R.Schepers, O.Van Den Bergh and K.P.Van De Woestijne (Received 14 July 1997 accepted 11 March 1998)

The purpose of the present study was to investigate the diagnostic specificity of bodily symptoms and respiratory behavior at rest and after a hyperventilation provocation test (HVPT) in patients that were either grouped according to the DSM classification or diagnosed as suffering from hyperventilation syndrome. Nine hundred three anxiety and somatoform patients, showing symptoms supposedly caused by psychogenic hyperventilation, and 170 healthy subjects, were studied. Breathing pattern and end tidal CO 2 concentration were recorded during breathing at rest and following a HVPT. Subjective symptoms in daily life and after HVPT were measured. A principal components analysis was performed on both the symptoms and breathing variables and their specificity levels were compared in the two classifications of patients. Some symptoms in daily life were gruped together with the same symptoms after the HVPT, other symptoms were not. This suggests that the HVPT elicited partly specific symptoms, and partly reproduced the symptoms experienced in daily life. Similar findings were observed with respect to the breathing variales. Patients with panic differed from other patients with anxiety disorder. by an increased level of symptoms and a FETCO 2 decline at rest. The HVPT may be informative for diagnosis because it provokes some of the typical somatic and psychological symptoms, and it identifies the breathing instability that is characteristic of both patients with HVS and with anxiety. The same symptoms and breathing variables characterized the patients, whatever their classification. Overall, the specificity of breathing variables is rather low. c 1998 Elsevier Science Inc.

关键词： Breathing pattern End tidal CO 2 concentration Hyperventilation provocation test panic disorder.

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