Vascular age: integrating carotid intima-media thickness measurements with global coronary risk assessment.

Published

Journal Article

BACKGROUND: An imaging test that quantifies atherosclerotic burden and that can be integrated with existing risk stratification paradigms would be a very useful clinical tool. HYPOTHESIS: Measurement of carotid intima-media thickness (CIMT) is feasible in a clinical setting. Such measurements can be integrated into coronary risk assessment models. METHODS: Carotid intima-media thickness was measured by B-mode ultrasound in 82 consecutive patients without manifest atherosclerotic vascular disease. The values were used to determine "vascular age" (VA) based on nomograms from the Atherosclerosis Risk in Communities study. Vascular age was substituted for chronological age and standard and vascular age-adjusted 10-year coronary heart disease (CHD) risk estimates were compared. RESULTS: The mean chronological age was 55.8 +/- 9.0 years. The mean VA using CIMT was 65.5 +/- 18.9 years (p < 0.001). The Framingham 10-year hard CHD risk estimate was 6.5 +/- 4.9%. Substituting CIMT-derived VA for chronological age increased the 10-year CHD risk estimate to 8.0 +/- 6.8% (p < 0.001). Of 14 subjects initially at intermediate risk, 5 (35.7%) were reclassified as higher risk and 2 (14.3%) were reclassified as lower risk. Significant predictors of reclassification were tobacco use, high-density lipoprotein cholesterol, systolic blood pressure, and low-density lipoprotein cholesterol. CONCLUSIONS: Measurement of CIMT, a noninvasive estimate of current atherosclerotic burden, is feasible in a clinical setting and can be integrated into CHD risk assessment models. Determining VA using CIMT values may help individualize the age component of population-based CHD risk estimates. This strategy should be tested in a large trial with hard clinical endpoints.

Full Text

Duke Authors

Cited Authors

  • Stein, JH; Fraizer, MC; Aeschlimann, SE; Nelson-Worel, J; McBride, PE; Douglas, PS

Published Date

  • July 1, 2004

Published In

Volume / Issue

  • 27 / 7

Start / End Page

  • 388 - 392

PubMed ID

  • 15298037

Pubmed Central ID

  • 15298037

International Standard Serial Number (ISSN)

  • 0160-9289

Digital Object Identifier (DOI)

  • 10.1002/clc.4960270704

Language

  • eng

Conference Location

  • United States