Watershed Strokes

Question 1

What is a watershed stroke?

Answer 1

Associated with arterial vascular disease

Occurs where 2 or more cerebral arterial systems meet

Question 2

What are some causes of watershed strokes?

Answer 2

Hypoprrfusion d/t shock, hypotension, hemorrhage, MI

Microclots from carotid Artery disease

Question 3

What percentage of ischemic strokes are watershed strokes?

Answer 3

10%

Question 4

Name the 2 types of watershed strokes

Answer 4

Internal (subcortical)

External (cortical)

Question 5

Watershed strokes are also called

Answer 5

Border zone infarcts

Question 6

Internal border zone infarcts are usually caused by

Answer 6

Hemodynamic compromise

Question 7

External border zone infarcts are caused by

Answer 7

Embolism

Question 8

Internal watershed strokes can occur

Answer 8

• Between superficial and deep branches of the MCA

- Between superficial branches of the MCA and ACA

Question 9

Where is a cortical watershed stroke located?

Answer 9

Among the branches of the ACA,MCA, and PCA