Strokes are classified as either ischemic or hemorrhagic. Ischemic strokes are caused by the blockage of an artery. Hemorrhagic strokes are caused by bleeding in the brain.
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A subarachnoid hemorrhage means that there is bleeding in the space that surrounds the brain. Most often, it occurs when a weakened area in a blood vessel (aneurysm) on the surface of the brain bursts and leaks. The blood then builds up around the brain and inside the skull increasing pressure on the brain. This can cause brain cell damage, life-long complications, and disabilities.
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Tests that may be used to help diagnose a stroke include a CT scan or MRI, and an electroencephalogram.
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Arteriovenous malformations (AVMs) happen when a group of blood vessels in your body forms incorrectly. Here's what you need to know.
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A cerebral cavernous malformation (CCM) is a collection of small blood vessels (capillaries) in the central nervous system that is enlarged and irregular in structure. In CCM, the walls of the capillaries are thinner than normal, less elastic, and likely to leak. Cavernous malformations can happen anywhere in the body. They most commonly cause symptoms when they are found in the brain and spinal cord.
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