Stroke, also known as stroke or cerebrovascular accident, including hemorrhagic and ischemic stroke, is an important disease that endangers people’s health, with high incidence, high disability, high mortality and high recurrence rate, has become the three major causes of death with cardiovascular disease, malignant tumors, and is the primary cause of serious disability. Precursors of stroke 1. Suddenly distorted mouth and eyes, salivation at the corners of the mouth, slurred speech, difficulty in spitting out words, aphasia or failure to speak, difficulty in swallowing, weakness or inflexibility of one limb, unstable walking or sudden fall. 2. Numbness of face, tongue, lips or limbs, some of them have haziness in front of the eyes or cannot see anything for a while, tinnitus or hearing changes. 3.Disorders of consciousness, manifested as mental depression, always wanting to sleep or drowsy all day. 4. Transient limb weakness, transient black haze, slurred speech. 5. Suddenly, the speech is not working or slurred, or even cannot speak, but it lasts for a short time, up to 24 hours. Stroke susceptible high-risk groups 1, people with a family history of stroke. As with hypertension, cerebrovascular disease has a genetic predisposition. 2, people with hypertension or a history of hypertension. Hypertension is recognized as the most important risk factor for cerebrovascular disease. 3.Diabetes mellitus. The disorder of sugar metabolism and fat metabolism in diabetic patients increases the risk of arterialization and the occurrence of cerebrovascular disease. 4, heart disease, especially coronary heart disease, cardiac insufficiency, all to varying degrees reduce cerebral blood flow, prone to the formation of cardiac microthrombus dislodgment, so that the risk of cerebrovascular disease increases. 5. Transient cerebral ischemic attack, commonly known as “mini-stroke”, is often a precursor of cerebrovascular disease. If repeated attacks, it is more likely to develop into a “complete stroke” in the near future. 6, cerebral atherosclerosis, is the pathological basis of cerebrovascular disease, due to cerebral artery intima thick, lumen narrowing, resulting in insufficient blood supply to the brain, internal carotid artery atherosclerotic plaque micro thrombus off can cause cerebral embolism. 7, other such as obesity, fatty meat, hyperlipidemia, excessive addiction to tobacco and alcohol, short temper, low physical activity, congenital cerebral artery malformation and cervical spondylosis often vertigo hair. It is generally believed that if a person has several susceptibility factors at the same time, the risk of cerebrovascular disease will increase. And when we know who is susceptible to stroke, we should target prevention. Carotid artery stenosis and stroke The brain is a special oxygen-demanding organ, with about 750-1000 ml per minute supplied to the brain. Each side of the internal carotid artery passes about 350 ml of blood per minute. When the narrowing of the internal carotid artery exceeds 50%, the blood supply to the brain will be severely affected and the microcirculatory blood flow will slow down and stagnate, which can lead to the formation of blood clots, thus leading to ischemic strokes. Atherosclerotic plaques in the carotid artery can also be dislodged and cause stroke. Current research has found that nearly 1/3 of strokes are related to obstructive lesions in the carotid arteries, especially carotid stenosis due to various causes. If you are over 50 years old and have hypertension, coronary artery or peripheral arteriosclerosis, you should consider having a carotid ultrasound to exclude carotid stenosis. There are also some patients with carotid stenosis who show some symptoms, the common one is TIA attack, which manifests as sudden onset of dizziness, temporary darkness in one eye, numbness and weakness in arms and legs, and slurred speech. This symptom can appear only for a few minutes or hours, but disappear completely within 24 hours, which is often referred to as “mini-stroke”. Patients who have already had cerebral embolism should be checked for carotid artery stenosis as long as they recover well, because these patients will suffer from cerebral embolism again, and it is a more serious cerebral embolism, and if the possible carotid artery stenosis can be treated in time, the chance of recurrence will be greatly reduced.