Types of Stroke
The type of stroke you have affects your treatment and recovery.
The three main types of stroke are:
Most strokes (87%) are ischemic strokes.1 An ischemic stroke happens when blood flow through the artery that supplies oxygen-rich blood to the brain becomes blocked.
Blood clots often cause the blockages that lead to ischemic strokes.
A hemorrhagic stroke happens when an artery in the brain leaks blood or ruptures (breaks open). The leaked blood puts too much pressure on brain cells, which damages them.
High blood pressure and aneurysms—balloon-like bulges in an artery that can stretch and burst—are examples of conditions that can cause a hemorrhagic stroke.
There are two types of hemorrhagic strokes:
- Intracerebral hemorrhage is the most common type of hemorrhagic stroke. It occurs when an artery in the brain bursts, flooding the surrounding tissue with blood.
- Subarachnoid hemorrhage is a less common type of hemorrhagic stroke. It refers to bleeding in the area between the brain and the thin tissues that cover it.
Transient Ischemic Attack (TIA)
A transient ischemic attack (TIA) is sometimes called a “mini-stroke.” It is different from the major types of stroke because blood flow to the brain is blocked for only a short time—usually no more than 5 minutes.2
It is important to know that:
- A TIA is a warning sign of a future stroke.
- A TIA is a medical emergency, just like a major stroke.
- Strokes and TIAs require emergency care. Call 9-1-1 right away if you feel signs of a stroke or see symptoms in someone around you.
- There is no way to know in the beginning whether symptoms are from a TIA or from a major type of stroke.
- Like ischemic strokes, blood clots often cause TIAs.
- More than a third of people who have a TIA and don’t get treatment have a major stroke within 1 year. As many as 10% to 15% of people will have a major stroke within 3 months of a TIA.2
Recognizing and treating TIAs can lower the risk of a major stroke. If you have a TIA, your health care team can find the cause and take steps to prevent a major stroke.
- Know the Facts About Stroke
- Know the Signs and Symptoms of Stroke
- Men and Stroke
- Women and Stroke
From other organizations:
- What You Need to Know About Strokeexternal icon–National Institute of Neurological Disorders and Stroke
- Know Stroke: Know the Signs. Act in Time.external icon–National Institutes of Health
- Mind Your Risksexternal icon–National Institutes of Health
- Strokeexternal icon–Medline Plus
- Brain Health Resource Pageexternal icon–American Heart Association/American Stroke Association
- What is Stroke?external icon –National Stroke Association
- Mozzafarian D, Benjamin EJ, Go AS, Arnett DK, Blaha MJ, Cushman M, et al., on behalf of the American Heart Association Statistics Committee and Stroke Statistics Subcommittee. Heart disease and stroke statistics—2016 update: a report from the American Heart Association. Circulation 2016;133(4):e38–360.
- American Heart Association/American Stroke Association. TIA (Transient Ischemic Attack)external icon. Accessed October 6, 2016.