Strokes types and subtypes,

Strokes:




A stroke happens when blood flow to a part of the brain stops. A stroke is sometimes called a "brain attack." If blood flow is stopped for longer than a few seconds, the brain cannot get blood and oxygen. Brain cells can die, causing permanent damage.




There are two major types of stroke:
Ischemic stroke
Hemorrhagic stroke




Ischaemic strokes:

A stroke that is caused by a blood clot is called an ischaemic stroke (i-sck-ee-mic).


In everyday life, blood clotting is beneficial. When you are bleeding from a wound, blood clots work to slow and eventually stop the bleeding. In the case of a stroke, however, blood clots are dangerous because they can block arteries and cut off blood flow.
this kind of stroke may be  thrombolic stroke or the embolic stroke.

Hemorrhagic stroke:
 

 It results from a weakened vessel that ruptures and bleeds into the surrounding brain. The blood accumulates and compresses the surrounding brain tissue. The two types of hemorrhagic strokes are intracerebral (within the brain) hemorrhage or subarachnoid hemorrhage.

Hemorrhagic stroke occurs when a weakened blood vessel ruptures. Two types of weakened blood vessels usually cause hemorrhagic stroke: aneurysms and arteriovenous malformations (AVMs)