200071.vtt
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WEBVTT
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A stroke can occur when an obstruction such as a blood clot
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travels from another part of the body and lodges inside an artery in the brain.
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When an arterial wall becomes damaged, various types of emboli, or obstructions, can form.
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Emboli can be made up of various substances such as platelets, elements in the blood that help it clot,
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blood clots that form elsewhere and pass to the damaged area,
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cholesterol,
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or a combination of things.
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For example, an embolism is formed in the carotid artery and breaks loose,
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travelling towards the brain where it will eventually lodge, blocking the blood the brain needs.
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The blocked artery deprives the brain of oxygen, which cause damage to the surrounding tissue.
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The result is a stroke.