Document Detail


Altered regulation of the myocardial microcirculation in young smokers.
MedLine Citation:
PMID:  11173779     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Smoking is known to affect microcirculatory function in a middle-aged population. However, the effects of smoking on myocardial perfusion in young smokers have not been studied. Myocardial perfusion was measured in 15 smokers (24 +/- 2 years) and 15 nonsmokers (24 +/- 3 years) using positron emission tomography. Myocardial perfusion was measured at rest, during cold stress and during dipyridamole. Resting myocardial blood flow was similar in the two groups. The well-described correlation between rate-pressure product and myocardial blood flow was present only in the nonsmokers (r(2) = 0.61, p < 0.001). Myocardial blood flow corrected for the rate-pressure product declined during cold by 20% in the smokers [1.11 +/- 0.28 vs. 0.92 +/- 0.20 ml x g(-1) x min(-1) (p = 0.012)], but remained unchanged in nonsmokers [1.11 +/- 0.25 vs. 1.09 +/- 0.30 ml x g(-1) x min(-1) (p = NS)]. Dipyridamole-induced hyperemia was similar in the two groups [2.23 +/- 0.78 vs. 2.42 +/- 0.65 ml x g(-1) x min(-1) (p = NS)]. In conclusion, smoking induces abnormalities in myocardial microcirculatory regulation in young otherwise healthy smokers. The coronary flow reserve, however, is not significantly altered.
Authors:
M M Madsen; M Bøttcher; T Toftegaard Nielsen; J Czernin
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Cardiology     Volume:  94     ISSN:  0008-6312     ISO Abbreviation:  Cardiology     Publication Date:  2000  
Date Detail:
Created Date:  2001-02-22     Completed Date:  2001-04-12     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  1266406     Medline TA:  Cardiology     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  91-8     Citation Subset:  IM    
Copyright Information:
Copyright 2001 S. Karger AG, Basel
Affiliation:
Department of Cardiology B, Aarhus University Hospital, Aarhus, Denmark.
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MeSH Terms
Descriptor/Qualifier:
Endothelium, Vascular / physiopathology
Female
Heart / physiopathology*
Hemodynamics
Humans
Male
Microcirculation
Smoking / physiopathology*
Time Factors

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