Stroke overview

What is a stroke?
A stroke results when blood and oxygen flow to the brain is stopped or interrupted.

Causes and types of stroke
There are two types of stroke: ischemic and hemorrhagic.

Transient ischemic attacks (TIAs): 'Mini-strokes'
In some cases, strokes are preceded by transient ischemic attacks (TIAs) or "mini-strokes."

Risk factors and prevention
Risk factors increase your chance of having a stroke. Your doctor can help you determine your risk factors -- what you can and cannot control.

Stroke warning signs: Call 911
Stroke symptoms may last a short time and disappear. They are often present when you wake up.