Ischemic stroke occurs when an artery (blood vessel) carrying blood to the brain is blocked. High blood pressure is the most important risk factor for this type of stroke. Ischemic strokes account for about 87% of all strokes. The underlying condition for this type of obstruction is the development of fatty deposits or blood clots lining the vessel walls, narrowing the arteries in the neck or head. This condition is called Atherosclerosis.
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