2014 USPSTF
"Screening for Asymptomatic Carotid Artery Stenosis: U.S. Preventive Services Task Force Recommendation Statement"
http://annals.org/article.aspx?articleid=1886690
"Population: This recommendation applies to adults without a history of transient ischemic attack, stroke, or other neurologic signs or symptoms.

Recommendation: The USPSTF recommends against screening for asymptomatic carotid artery stenosis in the general adult population. (D recommendation)"