A watershed stroke or watershed infarct is defined as a brain ischemia that is localized to the vulnerable border zones between the tissues supplied by the anterior, posterior and middle cerebral arteries.. Watershed cerebral infarctions, also known as border zone infarcts, occur at the border between cerebral vascular territories where the tissue is furthest from arterial supply and thus most vulnerable to reductions in perfusion.. Powerpoint slideshow about 'watershed zone' - tex an image/link below is provided (as is) to download presentation. download policy: content on the website is provided to you as is for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author..
The map combines information from the ndpes permit area, watershed management zones, and the groundwater basin to identify the specific retention requirements that apply. the green shading below depicts urban areas where infiltration is required for 95th percentile storms (zone 1 and zones 4,7, and 10 within groundwater basin).. The significance of the watershed zones is that in the event of a fall in the perfusion pressure in the vascular bed of one or more of the end arteries, the watershed zone, being an area of comparatively poor vascularity, is most vulnerable to ischemia.. The hypoperfusion in the right hemisphere resulted in multiple internal border zone infarctions. this pattern of deep watershed infarction is quite common and should urge you to examine the carotids. see the article on multiple sclerosis for the differentiation between internal border zone infarctions, lacunar infarctions and ms..
