Document Detail

The relationship between coronary stenosis severity and compression type coronary artery movement in acute myocardial infarction.
MedLine Citation:
PMID:  20362716     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Acute myocardial infarction is thought to occur at sites of minor coronary stenosis. Recent data challenge this and also propose a role for coronary artery movement (CAM) in plaque instability. We examined the relationship between coronary stenosis severity, CAM pattern, and infarct-related lesions (IRLs) in acute myocardial infarction. METHODS: We investigated 203 consecutive patients with ST-segment elevation myocardial infarction after successful fibrinolysis. Quantitative coronary angiography, CAM pattern, and extent score (atheroma burden) analysis was performed for each coronary artery segment. RESULTS: The IRL stenosis was at least moderate (>50%) and severe (>70%) in 78% and 31% of patients, respectively. Culprit arteries were associated with higher atheroma extent scores (25.2 vs 21.6, P < .001). Analysis of 2,228 coronary segments showed that stenosis severity and IRLs were highly correlated, such that the likelihood of being a culprit segment progressively increased with worsening stenosis (odds ratio [OR] 30.0, 95% confidence interval [CI] 19.0-47.6, P < .001, for >70% vs <30% stenosis). Compression CAM was also strongly associated with culprit segments (OR 3.4, 95% CI 2.6-4.5, P < .001). In addition, compression CAM and stenosis severity were strongly correlated, with the likelihood of a coronary segment having compression CAM progressively increasing with worsening stenosis (OR 56.4, 95% CI 37.9-83.8, P < .001, for >70% vs <30% stenosis). CONCLUSIONS: In patients with ST-segment elevation myocardial infarction, there is a strong relationship between stenosis severity and IRLs. Our study also raises the hypothesis that compression CAM may accelerate atherosclerosis and predispose to plaque vulnerability.
Kim H Chan; Chirapan Chawantanpipat; Tim Gattorna; Thamarath Chantadansuwan; Adrienne Kirby; Ann Madden; Anthony Keech; Martin K C Ng
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American heart journal     Volume:  159     ISSN:  1097-6744     ISO Abbreviation:  Am. Heart J.     Publication Date:  2010 Apr 
Date Detail:
Created Date:  2010-04-05     Completed Date:  2010-05-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370465     Medline TA:  Am Heart J     Country:  United States    
Other Details:
Languages:  eng     Pagination:  584-92     Citation Subset:  AIM; IM    
Copyright Information:
Copyright 2010 Mosby, Inc. All rights reserved.
Department of Cardiology, Royal Prince Alfred Hospital, Sydney, Australia.
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MeSH Terms
Coronary Angiography
Coronary Stenosis / complications*
Middle Aged
Myocardial Infarction / etiology*
Severity of Illness Index

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