According to relevant data, in recent years, cerebral infarction has become a serious threat to human life expectancy. 60% of clinical cerebral infarction is caused by carotid stenosis, therefore, early and timely detection of carotid stenosis symptoms and timely unblocking of blood vessels through surgery to ensure smooth blood flow can well prevent cerebral infarction. How to determine if you have carotid stenosis Atherosclerotic plaques are an important factor causing carotid stenosis, and as these plaques increase in size or rupture, they can cause carotid stenosis or embolism, resulting in cerebral infarction. Patients usually experience ischemic symptoms in the early stages, such as dizziness, blackouts, insomnia and memory loss. When an ischemic stroke occurs, severe neurological deficits such as hemiparesis and aphasia may remain. This disease is usually more likely to occur in middle-aged and elderly people, so they need to pay extra attention and be alert. Carotid artery stenosis is not diagnosed clinically by the symptoms alone. Because the specific degree of carotid stenosis cannot be seen clearly by the human eye, some medical imaging techniques are needed. Can carotid artery stenosis be determined by ultrasound criteria? Generally speaking, the thickness of the plaque and the flow velocity of the carotid artery can be determined by ultrasound. When the thickness of the plaque exceeds 1 mm and the flow velocity of the carotid artery exceeds 100 patients need to be alert. DSA is the gold standard for diagnosing carotid artery stenosis, which can clearly observe the location, extent and degree of stenosis as well as the formation of side branches, and can also accurately determine the nature of the lesion, so patients are recommended to undergo DSA to confirm the diagnosis. According to clinical practice, when the degree of carotid artery stenosis is greater than 50%, surgical treatment can be performed in a timely manner. Carotid endarterectomy is an advanced and mature technique that is effective in the treatment of carotid stenosis