Watershed Infarcts

Watershed Infarction:

Watershed infarcts occur at the border zones between major cerebral arterial territories as a result of hypoperfusion.


There are two patterns of border zone infarcts:

1. Cortical border zone infarctions Infarctions of the cortex and adjacent subcortical white matter located at the border zone of ACA/MCA and MCA/PCA
2. Internal border zone infarctions
   Infarctions of the deep white matter of the centrum semiovale and corona radiata at the border zone between lenticulostriate perforators and the deep penetrating cortical branches of the MCA or at the border zone of deep white matter branches of the MCA and the ACA.