health.msn.com — The risk of stroke has become so low for patients with asymptomatic carotid stenosis (ACS), 95 percent of them would be better off receiving medical therapy rather than surgery or stenting, according to a Canadian-led study. ACS is narrowing of the carotid (neck) artery that has not yet caused a stroke or transient ischemic attack (TIA). In the United States, one-half to two-thirds of patients who undergo revascularization surgery have no symptoms, according to background information in a University of Western Ontario new release about the study.
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