Stroke is a medical condition in which poor blood flow to the brain results in cell death. There are two main types of stroke: ischemic, due to lack of blood flow, and hemorrhagic, due to bleeding.They result in part of the brain not functioning properly.
Signs and symptoms of a stroke may include
- An inability to move (paralysis) or feel on one side of the body,
- Sudden loss of balance while walking
- Problems understanding or speaking,
- Feeling like the world is spinning (vertigo),
- Loss of vision to one side.
Signs and symptoms appear suddenly in stroke. If symptoms last less than one or two hours it is known as a transient ischemic attack (TIA). The symptoms of a stroke can be permanent.
Stroke is a medical emergency. If a patient with ischemic stroke seeks medical care within 3 to 4.5 hours of stroke onset in a tertiary hospital, intravenous thrombolysis treatment may lead to good recovery.