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Fear-related predictors of vasovagal symptoms during blood donation: it's in the blood.
MedLine Citation:
PMID:  21751041     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
A recent theory proposes that emotional fainting developed from an earlier adaptive characteristic, fainting in response to hemorrhage. Despite potential loss of consciousness, a dramatic decrease in blood pressure improves chances of survival in animals with severe wounds by reducing blood loss and facilitating clotting. Humans may have developed the characteristic of emotional fainting as a response to anticipated blood loss. This idea suggests that people with stronger fears of blood should be especially susceptible to fainting and milder vasovagal symptoms such as dizziness and lightheadedness. Two samples of young adult blood donors (N = 276 and 663) who completed the Medical Fears Survey (MFS) were studied. Items from the MFS related to fears of blood, needles, and mutilation were used to predict self-reported dizziness and nurse-initiated treatment for vasovagal reactions. In both samples, fears of experiencing or seeing blood loss were more closely associated with both subjective and objective measures of vasovagal reactions, despite the fact that other fears (e.g., fears related to needles) were more common overall. Better understanding of the mechanisms of vasovagal reactions has both theoretical and clinical implications, such as improving means of coping with invasive medical procedures.
Authors:
Blaine Ditto; Philippe T Gilchrist; Crystal D Holly
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-7-13
Journal Detail:
Title:  Journal of behavioral medicine     Volume:  -     ISSN:  1573-3521     ISO Abbreviation:  -     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-7-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7807105     Medline TA:  J Behav Med     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Psychology, McGill University, 1205 Dr Penfield Ave, Montreal, QC, H3A 1B1, Canada, blaine.ditto@mcgill.ca.
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