ischemic penumbra

ischemic penumbra
an area of moderately ischemic brain tissue surrounding an area of more severe ischemia; blood flow to this area may be enhanced in order to prevent the spread of a cerebral infarction.

Ischemic penumbra on CT perfusion imaging in acute stroke. (A), Mapping of mean transit time (MTT) shows a large deficit corresponding to the entire left middle coronary artery (MCA) territory. (B), Mapping of cerebral blood volume (CBV) shows a small dark-appearing deficit (arrow) in the left basal ganglia region, representing the infarcted core. The surrounding area showing a deficit in the MTT map but not the CBV map is the potentially salvageable ischemic penumbra.


Medical dictionary. 2011.

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