“…A number of large-scale, multi-centered, randomized clinically controlled trials have shown that among patients with symptomatic moderate carotid stenosis and asymptomatic severe stenosis, pure drug treatment was generally unsatisfactory in the latter patients, and that carotid endarterectomy (CEA), the standard surgery for carotid stenosis, would likely be more effective (Anonymous, 1991;Boules et al, 2005;Frego et al, 2009;Ederle et al, 2010;Plummer et al, 2011). In recent years, along with the developments of nerve interventional techniques and interventional materials science, the intervention of a percutaneous intravascular stent has become a research focus for the treatment of carotid artery stenosis, which has yielded very good results (Massop et al, 2009;Kan et al, 2012;Shobha et al, 2012). Although some studies have shown that carotid stent angioplasty may result in some complications, even severe complications, most researchers have suggested that the carotid stenting results are even better than CEA results (Tallarita et al, 2011;Fokkema et al, 2012;Dumont and Rughani, 2012).…”