Breathing Patterns Associated with Trait Anxiety and Breathlessness in Humans
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- Masaoka Yuri
- Department of Physiology II, Showa University School of Medicine
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- Jack Sandy
- Aintree Chest Center, University Hospital Aintree
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- Warburton Christopher J.
- Aintree Chest Center, University Hospital Aintree
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- Homma Ikuo
- Department of Physiology II, Showa University School of Medicine
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Idiopathic hyperventilation (IH) is a condition of uncertain aetiology characterized by sustained arterial and alveolar hypocapnia and a plethora of symptoms, the most commonly reported being shortness of breath, and breathlessness. We previously reported that anxiety increases respiratory frequency and minute ventilation with no change in metabolism in normal subjects. In this study, we compared the breathing frequency response to 5% and 7% of CO2 gas mixtures in normal subjects (n = 13) and in subjects with IH (n = 9), taking into account anxiety and breathlessness in order to determine how breathing patterns may vary with changes in the degree of involvement of higher brain centers because of anxiety and the perception of breathlessness. CO2 produced a significantly higher value in respiratory frequency (f) in subjects with IH. Subjects with IH also showed lower PETCO2 than normal subjects. During the inhalation of room air, a significant correlation between f and trait anxiety scores was observed in normal subjects (r = 0.49) and IH subjects (r = 0.69). However, the IH group showed no significantly higher trait anxiety in comparison with normal subjects. There was a significant correlation between the level of perceived breathlessness and f during the inhalation of 5% and 7% CO2, even during the inhalation of room air in IH subjects. This study suggests that an excessive increase in f in subjects with IH may be due to the interaction of two factors, trait anxiety and breathlessness.<br>
収録刊行物
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- The Japanese Journal of Physiology
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The Japanese Journal of Physiology 54 (5), 465-470, 2004
一般社団法人 日本生理学会
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詳細情報 詳細情報について
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- CRID
- 1390282680019142784
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- NII論文ID
- 10014283087
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- NII書誌ID
- AA00691224
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- COI
- 1:STN:280:DC%2BD2M%2FktVyhsw%3D%3D
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- ISSN
- 18811396
- 0021521X
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- NDL書誌ID
- 7221250
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- PubMed
- 15667670
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- 使用不可