Document Detail


Effects of various environmental temperatures on effort angina.
MedLine Citation:
PMID:  483493     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Eleven patients with effort angina and a history of cold intolerance performed short-term bicycle exercise tests at various room temperatures, 20, 10, 0 and -10 degrees C, and a few patients also at -30 degrees C. A significant reduction of maximal working capability (expressed as maximal work load, MWL), limited by moderately severe angina, was found at -10 degrees C (7% +/- 1, SEM, P less than 0.05) compared with normal room temperature. At 0 and 10 degrees C changes of MWL were small and not significant, and at -30 degrees C no further decrease of MWL was seen. About half of the patients, however, showed a tendency toward a decrease in MWL with decreasing environmental temperature, and and the decrease in MWL correlated significantly with an increase in rate pressure product (RPP) during exercise at both 0 and -10 degrees C. Thus, the decrease in working capability on exposure to cold could be explained by an increase in heart work. Warming up effects of exercise, counteracting the cold-induced increase in peripheral vascular resistance, were indicated by a diminishing difference in systolic blood pressure between a cold and normal environment with increasing work time.
Authors:
C Lassvik; N H Areskog
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Upsala journal of medical sciences     Volume:  84     ISSN:  0300-9734     ISO Abbreviation:  Ups. J. Med. Sci.     Publication Date:  1979  
Date Detail:
Created Date:  1979-11-21     Completed Date:  1979-11-21     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0332203     Medline TA:  Ups J Med Sci     Country:  SWEDEN    
Other Details:
Languages:  eng     Pagination:  173-80     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Angina Pectoris / physiopathology*
Blood Pressure
Exercise Test
Heart / physiopathology*
Heart Rate
Humans
Male
Middle Aged
Physical Exertion*
Temperature*

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


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