What is a stroke?
Stroke primarily refers to cerebrovascular disease. Acute onset of stroke usually presents with focal neurological deficits, mainly divided into ischemic and hemorrhagic strokes. Ischemic stroke, primarily referring to cerebral infarction, occurs due to an interruption in the blood supply to the brain, causing vessel occlusion and resulting in various clinical syndromes. Clinically, it presents rapidly with symptoms such as limb paralysis, slurred speech, and facial drooping. The pathogenesis of ischemic stroke is caused by central arteriosclerosis of large vessels. Additionally, stroke also includes cerebral embolism, mainly referring to atrial fibrillation-induced emboli from wall-attached thrombi, and other foreign bodies causing embolic blockage, leading to necrosis of brain tissue. Stroke also encompasses hemorrhagic stroke, with a typical condition being cerebral hemorrhage, which is due to long-term hypertension causing hyaline degeneration of the small arterial walls, eventually leading to necrosis and rupture with bleeding, resulting in neurological deficits.
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