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Smoking or chewing it raises your odds of a stroke. Nicotine makes your blood pressure go up. Cigarette smoke causes a fatty buildup in your main neck artery. It also thickens your blood and makes it more likely to clot. Even secondhand smoke can affect you.
A stroke may be caused by a blocked artery (ischemic stroke) or the leaking or bursting of a blood vessel (hemorrhagic stroke). Some people may experience only a temporary disruption of blood flow to the brain (transient ischemic attack, or TIA) that doesn't cause permanent damage.
This type of stroke is caused by blockages or narrowing of the arteries that provide blood to the brain, resulting in ischemia. Ischemia is severely reduced blood flow that damages brain cells.
A stroke can have many causes, but 90% of events are attributed to a few specific issues. People with high blood pressure are twice as likely as people with regular blood pressure to experience a stroke. Others factors, such as alcohol and drug consumption, can also influence the risk of stroke.
The blockage of an artery in the brain by a clot (thrombosis) is the most common cause of a stroke. The part of the brain that is supplied by the clotted blood vessel is then deprived of blood and oxygen. As a result of the deprived blood and oxygen, the cells of that part of the brain die and the part of the body that it controls stops working.
A stroke is caused by an artery in the brain either rupturing or clogging, depriving the brain of oxygen-rich blood. When an artery in the brain is clogged by a blood clot, it’s called an ischemic stroke .