| Characteristics of infradian and circadian rhythms in the persistent vegetative state. | |
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MedLine Citation:
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PMID: 22289544 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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This retrospective study investigated the circadian and infradian characteristics of blood pressure and heart rate in 26 patients with traumatic head injury in a persistent vegetative state (PVS). Systolic and diastolic blood pressures and heart rate were measured every hour for the first 240 h (10 days) following hospital admission. These data were analysed for the presence of circadian and infradian rhythms using the least-squares fit of the cosine function with the single cosinor method. Infradian rhythms were defined as biological rhythms with a period of approximately 7 days (circaseptan rhythms). All the patients studied had circadian and circaseptan rhythms of systolic and diastolic blood pressures and heart rate. The amplitudes of all the circaseptan rhythms were significantly greater than those of the corresponding circadian rhythms. It was concluded that there was an altered association between circadian and infradian blood pressure and heart rate rhythms in patients in a PVS. Circadian and infradian rhythms were present, but the infradian rhythm had a greater amplitude than the circadian rhythm. |
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Authors:
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J Guan; C You; Y Liu; Y Liu; R Zhang; Z Wang |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of international medical research Volume: 39 ISSN: 1473-2300 ISO Abbreviation: J. Int. Med. Res. Publication Date: 2011 |
Date Detail:
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Created Date: 2012-01-31 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0346411 Medline TA: J Int Med Res Country: England |
Other Details:
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Languages: eng Pagination: 2281-7 Citation Subset: IM |
Affiliation:
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Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, China; Department of Neurosurgery, Second Affiliated Hospital of Guangdong Medical College and School of Public Health, Guangdong Medical College, Zhanjiang, China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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