Cerebral infarction caused by carotid stenosis accounts for about 60% of the incidence of acute cerebral infarction. The risk level can be easily detected and evaluated during routine ultrasound and CTA/MRA examinations of the carotid arteries. Timely detection and proper management of stenoses greater than 80% or with unstable plaques will undoubtedly reduce the chance of cerebral infarction to a great extent. There is a 60-70% correlation between the severity of carotid artery stenosis and cardiac coronary artery stenosis; so in most cases examination of the severity of carotid plaque will infer cardiac coronary atherosclerosis, thus partly suggesting the need to pay attention to the possibility of coronary heart disease. Carotid artery stenosis can cause cerebral infarction due to embolism caused by dislodgement of wall clots on the surface of sclerotic plaque or debris on the surface of unstable plaque that enters the brain with blood flow; separation of sclerotic plaque and vessel wall to form a sandwich or very severe stenosis that causes complete blockage of the carotid lumen, resulting in massive cerebral infarction; or severe stenosis to form a persistent low-flow state that causes insufficient blood supply to the brain and cerebral ischemia characterized by watershed infarction. The following are some examples. Therefore, it is not necessary to be nervous when a mild atherosclerotic platelet is found by ultrasound or CTA examination of the neck during physical examination, because the stenosis formed by a stable plaque in the carotid artery does not exceed 70-80%, and generally does not cause significant cerebral ischemia, and in this case it is recommended that under the guidance of a doctor In such cases, long-term conservative treatment with lipid-lowering and antiplatelet drugs is recommended; if the stenosis has obviously caused cerebral ischemic symptoms, or if the stenotic plaque has broken down and become unstable, timely medical intervention is a wise choice. Currently, two types of treatment for carotid stenosis are transarterial stenting and endarterectomy, both of which have achieved positive safety and effectiveness in clinical applications. The advantages of stenting are that it is less painful for the patient and relatively easy to perform; it can be performed on severe stenosis of the entire carotid system; therefore, it is more widely indicated, especially for elderly patients with uncontrollable hypertension, diabetes mellitus, cardiac or renal insufficiency or various reasons who cannot tolerate surgical procedures. The carotid endarterectomy can completely remove the atherosclerotic plaque in the stenosis and completely unblock the carotid artery; this procedure has been honed for decades and the effect is certain. The advantages of both procedures complement each other and have developed into a routine treatment for cerebral power insufficiency caused by carotid stenosis.