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JOURNAL ARTICLE
REVIEW
Carotid artery stenosis screening: where are we now?
British Journal of Radiology 2018 October
Stroke poses a significant burden on healthcare and is the second largest cause of death globally. Both medical and surgical interventions to reduce the risk of stroke in asymptomatic patients have been shown to be effective but identifying the target at risk population is more problematic. Screening for carotid artery stenosis offers one pathway for this, as there is some correlation between risk of stroke and extent of stenosis. Identification of patients who are at risk of cardiovascular disease as well as stroke, allows initiation of effective medical treatment of modifiable risk factors to address this risk. In addition, carotid intima-media thickness is a way of assessing systemic atherosclerosis and may be valuable in risk stratification of patients for cardiovascular disease. Given the low prevalence of stenosis in the general population and the risks associated with undergoing surgical intervention, population wide screening is not recommended. This recommendation has not changed over the last 15 years, since the last major studies evaluating management and outcomes were published. However, both medical and surgical/endovascular treatments have advanced over that time. Further studies are underway to compare current treatments for the appropriate management of both symptomatic and asymptomatic patients with stenosis. Two of these trials, ECST-2 and CREST-2, are expected to be completed in the next 2-4 years and the results may initiate changes in the recommendations. The use of carotid intima-media thickness alongside traditional risk scores is controversial and more research is required in this area.
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