Carotid artery anatomy and geometry as risk factors for carotid atherosclerotic disease.

Abstract:

BACKGROUND AND PURPOSE:Traditional vascular risk factors do not completely explain the asymmetry, racial, and sex differences in carotid artery disease. Carotid anatomy and geometry may play a role in the pathogenesis of internal carotid artery (ICA) stenosis, but their effects are unknown. We hypothesized that carotid artery anatomy and geometry would be independently associated with ICA stenosis. METHOD:This is a retrospective study of patients with CT angiography at Monash Medical Centre, 2006 to 2007. Carotid arteries were segmented using semiautomated methods to estimate measures of carotid anatomy and geometry. Measurements of carotid artery geometry were performed according to the recent article by Thomas and colleagues. ICA stenosis was dichotomized as <30% or ≥ 30% stenosis. Cluster logistic regression was used to examine the associations of anatomy and geometry with stenosis accounting for the paired arteries within subjects, adjusting for age, sex, and vascular risk factors. RESULTS:Mean age of the sample (n=178) was 68.4 years (SD, 14 years). The following were independently associated with ICA stenosis: ICA radius at the bifurcation (OR, 0.20; 95% CI, 0.14-0.29), ICA angle (OR, 1.05 per degree increment; 95% CI, 1.04-1.07), age (OR, 1.05 per year increment; 95% CI, 1.03-1.07), male sex (OR, 1.72; 95% CI, 1.08-2.8), and ever-smoker (OR, 1.85; 95% CI, 1.15-2.96). CONCLUSIONS:Carotid anatomy and geometry may enhance the risk of stenosis independent of traditional vascular risk factors and may be of help in very early identification of patients at high risk of developing carotid artery atherosclerosis for aggressive intervention.

journal_name

Stroke

journal_title

Stroke

authors

Phan TG,Beare RJ,Jolley D,Das G,Ren M,Wong K,Chong W,Sinnott MD,Hilton JE,Srikanth V

doi

10.1161/STROKEAHA.111.645499

subject

Has Abstract

pub_date

2012-06-01 00:00:00

pages

1596-601

issue

6

eissn

0039-2499

issn

1524-4628

pii

STROKEAHA.111.645499

journal_volume

43

pub_type

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