Linked Life Data

15906079

Source:http://linkedlifedata.com/resource/pubmed/id/15906079

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5-6
pubmed:dateCreated
2005-7-26
pubmed:abstractText
Heat stress increases sympathetic activity and decreases parasympathetic activity to the heart. To test the hypothesis that carotid baroreflex responses of heart rate (HR) and systemic blood pressure become slowed with altered autonomic nerve activities during whole-body heat stress, we determined changes in HR and mean arterial pressure (MAP) in response to approximately 5 s of 40 mmHg neck pressure (NP) and of -65 mmHg neck suction (NS) in normothermia and during whole-body heating produced by a hot water-perfused suit. The NP and NS stimuli were triggered by R waves of an ECG during held expiration in the supine position. Whole-body heating did not alter the onset time of the HR and MAP responses during NP and NS. Whole-body heating significantly increased the time from onset of the HR response until peak of the response during NP (2.53 +/- 0.33 s in normothermia and 3.46 +/- 0.28 s during heating, P<0.05) and NS (1.20 +/- 0.23 s and 2.24 +/- 0.29 s, P<0.05). Whole-body heating significantly increased the time from onset of the MAP response until peak of the response during NP (4.31+/-0.46 s in normothermia, 6.67 +/- 0.56 s during heating, P<0.05) but not during NS (5.06 +/- 0.47 s and 4.50 +/- 0.60 s). These findings suggest that heat stress prolongs the response time of carotid-cardiac and carotid-vasomotor baroreflexes.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
1439-6319
pubmed:author
pubmed:issnType
Print
pubmed:volume
94
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
690-6
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
Whole-body heating slows carotid baroreflex response in human subjects.
pubmed:affiliation
Department of Clinical Pathophysiology, School of Health Sciences, University of Occupational and Environmental Health, 1-1 Iseigaoka, 807-8555 Yahatanishi-ku, Kitakyushu, Japan. yamazaki@health.uoeh-u.ac.jp
pubmed:publicationType
Journal Article, Clinical Trial, Research Support, Non-U.S. Gov't