Stroke is a major cause of mortality and disability worldwide. The relationship of extracranial cerebrovascular disease to ischemic stroke has been clearly demonstrated. In particular, atherosclerotic occlusive disease of the carotid artery is considered to be one of the key treatable causes of ischemic stroke, and thus the role of the vascular surgeon in stroke prevention is critical.
Carotid Endarterectomy is the most frequently performed open vascular surgical procedure for many years. Several randomized prospective clinical trials have demonstrated the safety and efficacy of this procedure in the prevention of ischemic stroke in symptomatic and properly selected asymptomatic patients with significant carotid stenoses.
CAS is indicated as an alternative to CEA for symptomatic patients at average or low risk of complications associated with endovascular intervention when the diameter of the lumen of the internal carotid artery is reduced by more than 70% as documented by noninvasive imaging or more than 50% as documented by catheter angiography and the anticipated rate of periprocedural stroke or mortality is less than 6%.