Document Detail

Cardiovascular responses of Type A and Type B behavior patterns to visual stimulation during rest, stress and recovery.
MedLine Citation:
PMID:  17283386     Owner:  NLM     Status:  MEDLINE    
Differences in the cardiovascular responses of individuals with behavior patterns of Type A and Type B were investigated during rest, stress, and recovery by visual stimulation. Thirty healthy undergraduate and graduate students (mean age: 22.18+/-1.44 years) were categorized as Type A (N=14), or Type B (N=16) based on the Kwansei Gakuin's daily life questionnaire. The cardiovascular reactivity of all participants was repetitively monitored for 6 sessions, with each session comprising 3 conditional phases, viz., resting, stress, and post-stress recovery. A gray screen was displayed during resting, displeasure-evoking images were displayed under the stress condition, and video clips of a forest or a control image (a gray screen) were displayed during the recovery condition. When participants were subjected to different stimuli on a 42-inch plasma television screen in each session, electrocardiograms (ECG), impedance cardiograms and the blood pressure (BP) of the respective participants were continuously monitored. According to the results, Type A indicated higher sympathetic reactivity than Type B during resting and under stress. As such, Type A indicated a shorter pre-ejection period (PEP) level during resting and a greater cardiac output (CO) increase under stress than Type B. Furthermore, parasympathetic predominance and parasympathetic antagonism accompanying the enhanced sympathetic activity induced by the unpleasant stress images decreased heart rate (HR) in both Type A and Type B, although the decrease in Type A was relatively meager. Unlike previous studies, the present study demonstrated that Type A indicated more enhanced sympathetic reactivity than Type B in resting physiological arousal levels and visual stimulus-induced stress.
Jeong-Mi Lee; Shigeki Watanuki
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Publication Detail:
Type:  Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of physiological anthropology     Volume:  26     ISSN:  1880-6791     ISO Abbreviation:  -     Publication Date:  2007 Jan 
Date Detail:
Created Date:  2007-02-06     Completed Date:  2007-04-24     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  101269653     Medline TA:  J Physiol Anthropol     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  1-8     Citation Subset:  IM    
Department of Human Living System Design, Graduate School of Design, Kyushu University, Fukuoka, Japan.
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MeSH Terms
Anthropology, Physical
Arousal / physiology*
Cardiovascular Physiological Phenomena
Cardiovascular System / physiopathology*
Heart Rate / physiology*
Photic Stimulation
Stress, Psychological / physiopathology*
Type A Personality

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