Showing posts with label facts. Show all posts
Showing posts with label facts. Show all posts

Friday, May 10, 2013

Get the Facts on Stroke


Definition

Stroke is a brain injury. It occurs when the blood supply to the brain is interrupted. Without oxygen and nutrients from blood, brain tissue dies in less than 10 minutes. The tissue death causes a sudden loss in function.

Causes

A stroke occurs when there is a loss of blood flow. It may happen because of a blockage in blood flow, called ischemic stroke, or because of bleeding in the brain, called hemorrhagic stroke.

A sudden decrease in the flow of blood may be caused by:
  • A clot that breaks off from another part of the body (such as the heart or neck) and lodges in blood vessel of neck or brain—there are certain conditions which predispose people to form blood clots, such as: