Stroke Channel
Topics & Medications
Related Channels

Cause of Mini-Strokes

The cause of mini-strokes involves a lack of blood flow to the brain that occurs because a blood vessel becomes narrowed or blocked. Most mini-strokes occur when an embolism or thrombosis leads to a blood clot blocking a blood vessel in or near the brain. Stenosis (a severe narrowing of an artery) can also be a cause of mini-strokes.

What Is the Cause of Mini-Strokes?

A transient ischemic attack (also known as a TIA or "mini-stroke") is caused by a temporary lack of oxygen- or nutrient-rich blood to a part of the brain. This lack of blood flow occurs because a blood vessel becomes severely narrowed or blocked.
The cause of mini-strokes is the same as that of an ischemic stroke (see Stroke Causes). The difference between a stroke and a mini-stroke involves duration. By definition, stroke symptoms last for at least 24 hours, while a mini-stroke often lasts less than 30 minutes.
A blood vessel in the brain may become severely narrowed or blocked in several different ways. The two most common are an embolism and thrombosis. An embolism develops when a blood clot or other tissue from another part of the body (such as the heart) moves through the blood into the neck or brain.
Thrombosis occurs when a blood clot (known as a thrombus) forms within a blood vessel of the brain or neck. Unlike an embolism, with thrombosis the blood clot does not break free.
A blood vessel in or near the brain can become narrowed or blocked through stenosis, which is severe narrowing of an artery. Stenosis is most often caused by a plaque buildup.
Ouch! 6 Types of Pain You Might Experience When Getting a Stent


Referring Pages:
Terms of Use
Advertise with Us
Contact Us
About eMedTV
Privacy Policy
Copyright © 2006-2020 Clinaero, Inc.
eMedTV serves only as an informational resource. This site does not dispense medical advice or advice of any kind. Site users seeking medical advice about their specific situation should consult with their own physician. Click Terms of Use for more information.