Cerebral Hyperperfusion Syndrome, an Unusual but Disastrous Complication of Carotid Recanalization: A Case Report.

Cerebral hyperperfusion syndrome (CHS), known as the dark side of carotid recanalization, happens in about 0%-3% of patients. Unfortunately, physicians involving in carotid recanalization generally are not aware of diagnostic and therapeutic aspects of this unusual but potentially life-threatening disorder. Severe bilateral carotid stenosis is suggested to predispose patients to CHS by decrement of cerebrovascular reactivity in a setting of chronic hypoperfusion state. We here introduced such a case; a 69-year-old man, a known case of hypertension and ischemic heart disease, who developed progressive intracranial hypertension underlying CHS after carotid stenting because of symptomatic severe bilateral carotid stenosis.