STROKE is defined as an accident to the brain with "rapidly developing clinical signs of focal or global disturbance to cerebral function, with symptoms lasting 24 hours or longer, or leading to death, with no apparent cause other than of vascular origin and includes cerebral infarction, intracerebral hemorrhage, and subarachnoid hemorrhage".
There are two main types of strokes :
Sign & symptoms
Causes
The commoner type is an ischemic stroke, caused by interruption of blood flow to a certain area of the brain. Ischemic stroke accounts for 85% of all acute strokes. The 15% of acute strokes are hemorrhagic strokes which are caused by bursting of a blood vessel i.e. acute hemorrhage.