Document Detail


Augmentation index, pulse pressure amplification and superoxide anion production in patients with coronary artery disease.
MedLine Citation:
PMID:  15749189     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Free oxygen radicals appear to be involved in several processes that contribute to atherogenesis and increased arterial stiffness.
METHODS: The aim of our study was to evaluate arterial stiffness and the production of superoxide anions by activated polymorphonuclear neutrophils (PMN) obtained from patients with stable coronary artery disease (CAD). Thirty four consecutive patients were studied (21 men, 13 women, mean age 58 years) who underwent coronary angiography. Arterial stiffness was assessed by pulse wave analysis using a validated system (Sphygmocor Mx, AtCor Medical). Superoxide anion production by activated neutrophils was determined by a spectrophotometric method involving the measurement of cytochrome C reduction. The extent of coronary narrowing was estimated by calculation of the Gensini score.
RESULTS: Superoxide anion production by stimulated PMN showed a significant positive correlation with the augmentation index (AIx) and a significant negative correlation with pulse pressure amplification (PPA), (r=0.4, p=0.02; r=-0.5 and p=0.0026 respectively). In multivariable analyses, after adjustment for age, gender and Gensini score, superoxide anions and BMI were significant predictors of AIx (R2=57.37%, p=0.001) and PPA (R2=49.04%, p=0.008). Superoxide anion production was significantly higher in the middle (52.0+/-5.8 nmol O2-/2.5x10(6) PMN/30 min) and upper teriles (62.7+/-5.6) of AIx in comparison with the first tertile 31.8+/-4.1 (p< or =0.05, p< or =0.001). Moreover, superoxide anion production in the highest tertile of PPA was significantly lower (35.6+/-4.3 nmol O2-/2.5x10(6) PMN/30 min) than that in the tertile (60.8+/-6.2, p< or =0.05). Neither the augmentation index nor pulse pressure amplification correlate with the severity of coronary atherosclerosis as indicated by the Gensini score.
CONCLUSIONS: markers of arterial stiffness, AIx and pulse pressure amplification correlate with superoxide anion production but not with the severity of atherosclerosis in coronary arteries.
Authors:
A Wykretowicz; P Guzik; R Kasinowski; T Krauze; G Bartkowiak; M Dziarmaga; H Wysocki
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  International journal of cardiology     Volume:  99     ISSN:  0167-5273     ISO Abbreviation:  Int. J. Cardiol.     Publication Date:  2005 Mar 
Date Detail:
Created Date:  2005-03-07     Completed Date:  2005-06-16     Revised Date:  2014-07-29    
Medline Journal Info:
Nlm Unique ID:  8200291     Medline TA:  Int J Cardiol     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  289-94     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Biological Markers / blood
Blood Pressure / physiology*
Coronary Angiography
Coronary Artery Disease / blood,  physiopathology*,  radiography
Coronary Vessels / physiopathology*
Elasticity
Female
Humans
Male
Middle Aged
Neutrophils / metabolism*
Pulsatile Flow
Pulse
Severity of Illness Index
Spectrophotometry
Superoxides / blood*
Chemical
Reg. No./Substance:
0/Biological Markers; 11062-77-4/Superoxides

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


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