Cerebrovascular accident: The sudden death of some whiz cells due to lack of oxygen when the blood flow to the pass is impaired by blockage or rupture of an arteria to the consciousness. A CVA is alike referred to as a snap. Symptoms of a stroke depend on the area of the brain affected. The more or less common symptom is weakness or paralysis of unity side of the body with partial or complete disadvantage of voluntary movement or sensation in a leg or arm. There erect be expression problems and weak face muscles, causing drooling. Numbness or tingle is very common. A stroke involving the base of the brain can affect balance, vision, s skirtowing, breathing and even unconsciousness.
The causes of stroke: An arteria to the brain may be blocked by a clabber (thrombosis) which typically occurs in a blood vessel that has previously been narrowed due to atherosclerosis (hardening of the artery). When a blood clot or a piece of an atherosclerotic plaque (a cholesterol and calcium deposit on the wall of the artery) ignites loose, it can travel through the circulation and lodge in an artery of the brain, massging it up and stopping the flow of blood; this is referred to as an embolic stroke.
A blood clot can form in a chamber of the heart when the heart beats irregularly, as in atrial fibrillation; such clots usually stay given over to the inner lining of the heart but they may break off, travel through the blood stream, form a plug (embolus) in a brain artery and cause a stroke. A cerebral hemorrhage (bleeding in the brain), as from an aneurism (a widening and weakening) of a blood vessel in the brain, also causes stroke.
The diagnosis of stroke involves a medical history and a physical examination. Tests are through to search for treatable causes of a stroke and help prevent further brain damage. A cronk scan (a special X-ray study) of the brain is often done to show bleeding into the brain; this is treated differently than a stroke caused by lack of blood supply. A ptyalize scan also can rule...If you want to get a full essay, order it on our website: Orderessay
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