Watershed stroke
Watershed Stroke
A Watershed Stroke (pronunciation: /ˈwɔːtərˌʃɛd stroʊk/) is a type of stroke that occurs when the blood supply to certain areas of the brain, known as watershed areas, is reduced or interrupted.
Etymology
The term "watershed" is derived from the geographical term referring to a ridge of land that separates waters flowing to different rivers, basins, or seas. In the context of a stroke, it refers to the areas of the brain that are vulnerable to ischemia because they are located between the territories of two major arteries.
Causes
Watershed strokes are typically caused by a significant drop in blood pressure (hypotension), which can occur during surgery, severe illness, or due to certain medications. They can also be caused by atherosclerosis, a condition where the arteries become narrowed due to a buildup of plaque.
Symptoms
Symptoms of a watershed stroke can vary depending on the area of the brain affected, but may include weakness or numbness on one side of the body, difficulty speaking or understanding speech (aphasia), and problems with vision or balance.
Treatment
Treatment for a watershed stroke typically involves measures to restore blood flow to the brain, such as clot-busting drugs (thrombolytics) or procedures to remove the clot (thrombectomy). Long-term treatment may involve rehabilitation to help regain lost skills and prevent future strokes, such as medications to control blood pressure and cholesterol, and lifestyle changes like diet and exercise.
Related Terms
External links
- Medical encyclopedia article on Watershed stroke
- Wikipedia's article - Watershed stroke
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