Differences between carotid wall morphological phenotypes measured by ultrasound in one, two and three dimensions

被引:77
作者
Al-Shali, K
House, AA
Hanley, AJG
Khan, HMR
Harris, SB
Mamakeesick, M
Zinman, B
Fenster, A
Spence, JD
Hegele, RA
机构
[1] John P Robarts Res Inst, Blackburn Cardiovasc Genet Lab, London, ON N6A 5K8, Canada
[2] Univ Western Ontario, Dept Med, London, ON, Canada
[3] Univ Toronto, Dept Med, Samuel Lunenfeld Res Inst, Mt Sinai Hosp, Toronto, ON, Canada
[4] Univ Western Ontario, Thames Valley Family Practice Res Unit, London, ON, Canada
[5] Sandy Lake Hlth & Diabet Project, Sandy Lake, ON, Canada
基金
加拿大健康研究院;
关键词
atherosclerosis; carotid arteries; imaging; plaque; ultrasonics;
D O I
10.1016/j.atherosclerosis.2004.08.016
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Ultrasound measurements are both surrogate markers and risk factors for atherosclerosis end points. Carotid intima-media thickness (IMT) is most commonly used, but ultrasound can also define structures in higher spatial dimensions, such as total plaque area (TPA) and total plaque volume (TPV). Because there are minimal data regarding the relationship between IMT, TPA and TPV, we measured these variables in 272 Oji-Cree subjects. We found pairwise correlations for IMT:TPA, IMT:TPV and TPA:TPV of 0.507,0.588 and 0.846, respectively (transformed variables, all P < 0.0001). In a subset of 168 subjects with complete cardiovascular risk factor data, we performed multivariate regression analysis to identify sources of variation for IMT, TPA and TPV. We found that the ultrasound traits showed different correlations with individual cardiovascular risk factors. In particular, IMT was significantly associated with hypertension, TPA with smoking and plasma cholesterol, and TPV with diabetes. Therefore, these ultrasound measures of carotid artery morphology, while somewhat correlated, likely represent distinctive quantitative traits with different biological determinants, as underscored by different risk factor associations in the multivariate regression analysis. Because the measurements have different implications and determinants, investigators might need to be selective about the particular measurements they choose for specific applications. (C) 2004 Elsevier Ireland Ltd. All rights reserved.
引用
收藏
页码:319 / 325
页数:7
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