Abstract:
OBJECTIVES:This study examined whether combined ultrasound assessment of plaque size and echolucency in the carotid artery had an additive effect for predicting coronary events in patients with coronary artery disease (CAD). Ultrasound assessment of either plaque size or echolucency of carotid artery provides prognostic information on coronary events. Combined assessment of plaque size and echolucency of carotid artery has the advantage of obtaining both structural and compositional information in the same artery in a single session. METHODS AND RESULTS:Ultrasound assessment of carotid plaque maximum intima-media thickness (plaque-IMTmax) and echolucency with integrated backscatter analysis was performed in 413 patients with CAD and carotid plaque. All study patients were followed up prospectively for 54 months or until the occurrence of a coronary event. During the follow-up period, 49 coronary events occurred including 2 cardiac deaths, 10 non-fatal acute myocardial infarctions and 37 recurrent and refractory unstable angina. Multivariate Cox hazards analysis showed plaque-IMTmax alone (HR 2.01, 95%CI 1.30-3.10), plaque echogenicity alone (HR 0.86, 95%CI 0.80-0.91) and combination of high plaque-IMTmax and low echogenicity on categorical data (HR 2.56, 95%CI 1.39-4.74) were independent predictors of coronary events. Analysis using c-statistics showed that plaque-IMTmax and plaque echolucency in combination had a significant incremental effect on the predictive value of the conventional risk factors for coronary events. CONCLUSIONS:Combined ultrasound assessment of carotid plaque size and echolucency has an additive value for prediction of coronary events. Further studies need to evaluate the clinical utility of both ultrasound measurements for risk stratification in CAD.
journal_name
Atherosclerosisjournal_title
Atherosclerosisauthors
Hirano M,Nakamura T,Kitta Y,Sano K,Kodama Y,Kobayashi T,Fujioka D,Saito Y,Yano T,Watanabe K,Watanabe Y,Kawabata K,Obata JE,Kugiyama Kdoi
10.1016/j.atherosclerosis.2010.03.003subject
Has Abstractpub_date
2010-08-01 00:00:00pages
451-5issue
2eissn
0021-9150issn
1879-1484pii
S0021-9150(10)00185-1journal_volume
211pub_type
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