Document Detail


Metabolically exaggerated cardiac reactions to acute psychological stress: the effects of resting blood pressure status and possible underlying mechanisms.
MedLine Citation:
PMID:  20541585     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
The study aimed to: confirm that acute stress elicits metabolically exaggerated increases in cardiac activity; test whether individuals with elevated resting blood pressure show more exaggerated cardiac reactions to stress than those who are clearly normotensive; and explore the underlying mechanisms. Cardiovascular activity and oxygen consumption were measured pre-, during, and post-mental stress, and during graded sub-maximal cycling exercise in 11 young men with moderately elevated resting blood pressure and 11 normotensives. Stress provoked increases in cardiac output that were much greater than would be expected from contemporary levels of oxygen consumption. Exaggerated cardiac reactions were larger in the relatively elevated blood pressure group. They also had greater reductions in total peripheral resistance, but not heart rate variability, implying that their more exaggerated cardiac reactions reflected greater beta-adrenergic activation.
Authors:
George M Balanos; Anna C Phillips; Michael P Frenneaux; David McIntyre; Christos Lykidis; Harry S Griffin; Douglas Carroll
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Publication Detail:
Type:  Journal Article     Date:  2010-06-10
Journal Detail:
Title:  Biological psychology     Volume:  85     ISSN:  1873-6246     ISO Abbreviation:  Biol Psychol     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-08-02     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375566     Medline TA:  Biol Psychol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  104-11     Citation Subset:  IM    
Copyright Information:
Copyright (c) 2010 Elsevier B.V. All rights reserved.
Affiliation:
School of Sport and Exercise Sciences, University of Birmingham, Edgbaston, Birmingham, England, United Kingdom.
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