Incident stroke is associated with common carotid artery diameter and not common carotid artery intima-media thickness

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Abstract

BACKGROUND AND PURPOSE-: The common carotid artery interadventitial diameter is measured on ultrasound images as the distance between the media-adventitia interfaces of the near and far walls. It is associated with common carotid intima-media thickness (IMT) and left ventricular mass and might therefore also have an association with incident stroke. METHODS-: We studied 6255 individuals free of coronary heart disease and stroke at baseline with mean age of 62.2 years (47.3% men), members of a multiethnic community-based cohort of whites, blacks, Hispanics, and Chinese. Ischemic stroke events were centrally adjudicated. Common carotid artery interadventitial diameter and IMT were measured. Cases with incident atrial fibrillation (n=385) were excluded. Multivariable Cox proportional hazards models were generated with time to ischemic event as outcome, adjusting for risk factors. RESULTS-: There were 115 first-time ischemic strokes at 7.8 years of follow-up. Common carotid artery interadventitial diameter was a significant predictor of ischemic stroke (hazard ratio, 1.86; 95% confidence interval, 1.59-2.17 per millimeter) and remained so after adjustment for risk factors and common carotid IMT with a hazard ratio of 1.52/mm (95% confidence interval, 1.22-1.88). Common carotid IMT was not an independent predictor after adjustment (hazard ratio, 0.14; 95% confidence interval, 0.14-1.19). CONCLUSIONS-: Although common carotid IMT is not associated with stroke, interadventitial diameter of the common carotid artery is independently associated with first-time incident ischemic stroke even after adjusting for IMT. Our hypothesis that this is in part attributable to the effects of exposure to blood pressure needs confirmation by other studies. © 2014 American Heart Association, Inc.

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CITATION STYLE

APA

Polak, J. F., Sacco, R. L., Post, W. S., Vaidya, D., Kweku Arnan, M., & O’Leary, D. H. (2014). Incident stroke is associated with common carotid artery diameter and not common carotid artery intima-media thickness. Stroke, 45(5), 1442–1446. https://doi.org/10.1161/STROKEAHA.114.004850

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