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WHO (World Health Organization)
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| • "Stroke" definition (1971): "A sudden onset of disturbance of focal bran function due to the blockage or rupture of blood vessels."40
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| • "Stroke" definition (1980): "Rapidly developing clinical signs of focal (or global) disturbance of cerebral function, lasting more than 24 hours or leading to death, with no apparent cause other than that of vascular origin."4
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AHA-ASA (American Heart Association-American Stroke Association) (2013)
15
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| • Ischemic "stroke": "An episode of neurological dysfunction caused by focal cerebral, spinal, or retinal infarction." |
| • Intracerebral hemorrhagic "stroke": "Rapidly developing clinical signs of neurological dysfunction attributable to a focal collection of blood within the brain parenchyma or ventricular system that is not caused by trauma." |
| • Subarachnoid hemorrhagic "stroke": "Rapidly developing signs of neurological dysfunction and/or headache because of bleeding into the subarachnoid space, which is not caused by trauma." |
| • "Stroke" (not otherwise specified): "An episode of acute neurological dysfunction presumed to be caused by ischemia or hemorrhage, persisting ≥ 24 hours or until death, but without sufficient evidence to be classified as one of the above." |
