In the United Kingdom, and in other developed countries in which the population includes relatively large numbers of people older than 50 years, stroke is one of the commonest causes of disability and death. The term stroke is used to describe a sudden event, due to vascular disease, in which paralysis or (other) disturbance of function in the CNS occurs. It is thus a clinical term without a strictly defined meaning in pathology. Strokes are often referred to as cerebral vascular accidents, but, since there is always a cause, however difficult to understand or establish, this latter term is best avoided. Because the cause of a stroke is so frequently uncertain in clinical practice, clinicians and pathologists may use different classifications. While the pathologist can note the presence of infarction or haemorrhage, the two major subdivisions, the clinician can only consider which of these two lesions might be present. It is often difficult, therefore, to compare clinical and pathological data.
KeywordsInternal Carotid Artery Middle Cerebral Artery Subarachnoid Haemorrhage Cerebral Infarction Basilar Artery
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