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Surgical treatment for steno-obstructive pathology of the extracranial carotid artery is today the gold standard for the prevention of cerebral ischemic disease associated to the manifestation of atherosclerosis. During the 1990s, a number of randomised trials incontrovertibly demonstrated the advantages which are derived from carotid endarterectomy with respect to medical therapy alone, in patients with symptomatic or asymptomatic stenosis. As a whole, these -trials -indicated a perioperative rate of major adverse events (stroke, mortality and MACE) of about 9%. Many projects have since been conducted in the field of carotid surgery, and today the reported complication rates are lower than 3%, with excellent long-term results (North American Symptomatic Carotid Endarterectomy Trial Collaborators, N Engl J Med 325(7):445–534, 1991; Mayberg et al., JAMA 266(23):3289–945, 1991). The results of new arising techniques, such as carotid stenting, must be compared with these complication rates in order to have a clear benchmark for a more objective future dissemination. [ABSTRACT FROM AUTHOR]