Document Detail


Selective enhancement of the cardiac sympathetic response to exercise by anginal chest pain in humans.
MedLine Citation:
PMID:  2598427     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Cardiac and whole body [3H]norepinephrine kinetics were used to evaluate the response of overall and cardiac sympathetic activity to supine bicycle exercise in 31 patients with coronary artery disease (CAD) and in nine normal control subjects (group 1). Of the 31 patients with CAD, 20 developed evidence of myocardial ischemia during exercise (group 2), typical angina occurring in 20 of 20 and ischemic ST segment changes in 13 of 20, whereas 11 patients developed no evidence of ischemia (no chest pain or electrocardiographic changes) (group 3). Exercise resulted in increased total and cardiac NE spillover in all groups of patients. Basal cardiac NE spillover was similar in the three groups (group 1, 5 +/- 1 ng/min; group 2, 8 +/- 1 ng/min; group 3, 7 +/- 2 ng/min; p = NS), but during exercise, cardiac NE spillover was greater in patients who developed angina (group 2, 30 +/- 5 ng/min) than in those who did not (group 1, 17 +/- 2 ng/min; group 3, 17 +/- 2 ng/min; p less than 0.05). The increases in total NE spillover were similar in the three groups. Supine bicycle exercise increases cardiac and overall sympathetic tone in normal control subjects and in patients with CAD. The occurrence of angina selectively enhances the cardiac sympathetic response to exercise. In the absence of angina, patients with CAD and control subjects without CAD have similar sympathetic responses to exercise.
Authors:
A J McCance; J C Forfar
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Circulation     Volume:  80     ISSN:  0009-7322     ISO Abbreviation:  Circulation     Publication Date:  1989 Dec 
Date Detail:
Created Date:  1990-02-01     Completed Date:  1990-02-01     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0147763     Medline TA:  Circulation     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1642-51     Citation Subset:  AIM; IM    
Affiliation:
Department of Cardiovascular Medicine, John Radcliffe Hospital, Oxford, United Kingdom.
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MeSH Terms
Descriptor/Qualifier:
Aged
Angina Pectoris / etiology,  physiopathology*
Coronary Disease / physiopathology
Electrocardiography
Exercise / physiology*
Exercise Test
Female
Heart / innervation*
Humans
Male
Middle Aged
Norepinephrine / metabolism*
Sympathetic Nervous System / physiology*
Chemical
Reg. No./Substance:
51-41-2/Norepinephrine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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