Carotid artery stenosis is a common cerebrovascular disease, which is generally more frequent in the middle-aged and elderly population, but in recent years there is a trend of younger people. Carotid artery stenosis causes the lumen of carotid artery to become smaller, which affects the speed of blood flow and leads to poor blood supply to the brain, and if the carotid plaque is dislodged and enters the brain with the blood flow, it may directly block the distal vessels and cause acute cerebral infarction, which has very serious consequences. Therefore, carotid artery stenosis needs to be treated in time. Mild carotid stenosis is generally recommended to be treated conservatively by internal medicine, while more serious carotid stenosis needs to be treated surgically if necessary, depending on the specific situation. It is generally accepted in the international and domestic medical community that the standard surgical procedure for the treatment of carotid stenosis is carotid endarterectomy, which is a procedure that has been widely performed in recent years. Carotid endarterectomy was first performed by a foreign medical specialist in the 1950s to prevent cerebral infarction. Since then, carotid endarterectomy has become a standard procedure for the treatment of carotid stenosis and prevention of cerebral infarction. After 60 to 70 years of development, the technique of carotid endarterectomy is now very mature and safe. The surgery is performed under a microscope, which allows direct vision to completely peel off and remove the atherosclerotic plaque that causes carotid stenosis, remove the garbage that blocks the blood vessels, eliminate the source of emboli, smooth the inner wall of the carotid artery, restore the normal size of the inner diameter, and restore blood flow to a smooth flow to achieve good results. For patients with carotid artery stenosis, some people ask how long it takes to have carotid endarterectomy for cerebral infarction. This involves the contraindications to carotid endarterectomy and the timing of the procedure. Generally speaking, if a progressive cerebral infarction has occurred, then it takes three months before carotid endarterectomy can be performed; for non-progressive acute cerebral infarction, it is safer to perform carotid endarterectomy after six weeks; if it is a TIA attack or a mild cerebral infarction, carotid endarterectomy can generally be performed after two weeks. In recent years, carotid endarterectomy has been widely performed to treat moderate to severe carotid stenosis with good results. The oldest patient we have treated was a 90-year-old man. Through scientific and rigorous surgical planning and implementation, and careful perioperative management, the surgery was completed successfully and the patient recovered well.