Brain stroke can occur when a blood artery in the brain bursts and spills, obstructing blood flow to the brain. The rupture or obstruction keeps blood and oxygen from getting to the brain tissue. Without oxygen, the brain's tissues and cells quickly suffer damage and begin to die, which causes a variety of symptoms. When brain cells die, they often do not recover, which can cause catastrophic damage and can lead to physical, cognitive, and mental impairments.The brain needs to have appropriate blood flow and oxygenation restored as quickly as feasible. There are two basic forms of brain stroke. The most frequent kind, ischemic stroke accounts for 80% of brain strokes. 20% of brain strokes are caused by hemorrhagic stroke. Thrombotic or embolic strokes are both types of ischemic stroke. The most frequent kind of ischemic stroke is thrombotic. As a result of atherosclerosis (cholesterol-containing plaque deposits), a blood clot develops inside a sick or damaged artery in the brain, obstructing blood flow.
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