Abstract
A 70-year-old man with a history of recurrent ischemic stroke and end-stage renal disease was admitted to the neurology department for a transient ischemic attack. The patient underwent transfemoral cerebral angiography with iopamidol to evaluate the status of carotid stenosis. On the same day, the patient developed drowsy mentality, global aphasia, and fever. Electroencephalography showed continuous regional rhythmic delta activities (0.5 to 1.0 Hz) without definite spatiotemporal evolution, suggestive of focal seizure disorder arising from the left temporal area and ictal-interictal continuum. Computed tomography perfusion images showed hyperperfusion in the left hemisphere. The patient was diagnosed with contrast-induced encephalopathy and associated nonconvulsive status epilepticus. The patient was treated with oral lacosamide, levetiracetam, and daily hemodialysis. The patient’s mental status recovered after 8 days of intensive care unit care.
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