| Normalization of respiratory sinus arrhythmia by factoring in tidal volume. | |
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MedLine Citation:
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PMID: 9844249 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The amplitude of respiratory sinus arrhythmia (RSA) was measured in eight healthy young male students with special reference to the effect of tidal volume (Vt). Under simultaneously controlled respiratory frequency and Vt, the heart rate variability (HRV) of the subjects was measured. While the respiratory frequency was adjusted to either 0.25 or 0.10 Hz, the Vt was controlled at 13 different volumes for each frequency. Linear relationships between RSA amplitude and Vt were observed and close correlations were obtained for 0.25 Hz compared with 0.10 Hz. However, regression equations showed a marked variation among subjects. Furthermore, RSA amplitude was related to vital capacity. Subjects who had lower vital capacity tended to show higher RSA amplitudes at the same Vt. Therefore, the ratio (% Vt) of Vt to vital capacity is a more effective index in normalizing RSA than raw tidal volume. From these results, we have proposed a normalized RSA (RSA amplitude/% Vt) as a new index of autonomic activity that provides a constant value regardless of Vt. |
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Authors:
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H Kobayashi |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Applied human science : journal of physiological anthropology Volume: 17 ISSN: 1341-3473 ISO Abbreviation: Appl Human Sci Publication Date: 1998 Sep |
Date Detail:
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Created Date: 1999-01-06 Completed Date: 1999-01-06 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 9506216 Medline TA: Appl Human Sci Country: JAPAN |
Other Details:
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Languages: eng Pagination: 207-13 Citation Subset: IM; S |
Affiliation:
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Department of Ergonomics, Kyushu Institute of Design. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Arrhythmia, Sinus / physiopathology* Electrocardiography Heart Rate Humans Male Respiration* Tidal Volume / physiology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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