_:vb50950731 "url:https://www.columbianeurosurgery.org/conditions/cerebral-ischemia/"^^ . _:vb50950731 . _:vb50950731 . _:vb50950731 "url:https://en.wikipedia.org/wiki/Brain_ischemia"^^ . _:vb50950731 . _:vb50950731 . _:vb50950731 "An ischemia that is characterized by insufficient blood flow to the brain to meet metabolic demand."^^ . _:vb50950731 .