What causes ischemic stroke in posterior cerebral artery (PCA) stroke?

Updated: Jul 30, 2018
  • Author: Erek K Helseth, MD; Chief Editor: Helmi L Lutsep, MD  more...
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Answer

Ischemic stroke occurs when a region of cerebral blood flow is suddenly limited. This may occur by vessel occlusion or by relatively low flow. The rate of neuronal death varies with blood flow, variability in individual anatomy and collateralization, and inherent cerebral capacities (ie, some cerebral regions are more resistant than others).


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