The causes of stroke are many, as a stroke occurs when blood flow to the brain is blocked and this prevents the brain from getting oxygen and nutrients from the blood, then the brain cells begin to die within minutes. Sudden bleeding in the brain can also cause a stroke if it is damaged With brain cells, in this report we learn about the causes of stroke, according to the American Institutes of Health website.NIH“.
Causes of stroke
The causes of stroke are many and differ according to its type, and there are two main types of stroke with different causes:
Ischemic strokes are caused by a blockage in a blood vessel.
Hemorrhagic strokes are caused by sudden bleeding in the brain. Sometimes the doctor may not be able to know the cause of the stroke.
Here are the main causes of stroke
When a fatty substance called plaque builds up on the inner walls of your arteries, it can lead to a disease called atherosclerosis. Plaque hardens and narrows the arteries, which restricts blood flow to tissues and organs.
Plaque can build up in any artery in the body, including the arteries in the brain and neck, and it occurs Carotid artery disease When plaques build up in the carotid arteries in the neck that supply blood to the brain. It is a common cause of stroke.
Blood clots in the brain or anywhere else in the body
Plaque in an artery can break and platelets stick to the site of the plaque injury and clump together to form blood clots. These clots can partially or completely block an artery.
A blood clot that forms in one part of the body can detach and travel to the brain. This type of stroke is called an embolus stroke.
Some heart and blood diseases, such as atrial fibrillation and sickle cell disease, can cause blood clots and lead to stroke.
Chronic (long-standing) inflammation contributes to ischemic stroke and researchers are still trying to fully understand this. Inflammation can damage blood vessels and contribute to atherosclerosis. Additionally, an ischemic stroke can lead to inflammation that further damages brain cells.
A transient ischemic attack (TIA) occurs.TIABecause of a blockage in the brain just like an ischemic stroke, the blockage loosens before any damage to the brain and usually takes less than an hour but can come and go.
Sudden bleeding can cause a hemorrhagic stroke. This can happen when an artery in or above the brain opens. The leaked blood causes the brain to enlarge, putting pressure on it, which can lead to damage to brain cells.
Some conditions make blood vessels in the brain more likely to bleed.
An aneurysm is a balloon-like bulge in an artery that can expand and burst.
AVMs are poorly formed networks of arteries and veins that can open in the brain.
High blood pressure puts pressure on the inner walls of the arteries. This pressure makes them more likely to break, especially when weakened by aneurysms.
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