Cerebral gas embolism
May. 19, 2023
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(Top) Eyes open, a photoparoxysmal response is driven by intermittent photic stimulation up to 30 Hz and is accompanied by visual symptoms (see bottom). Above 30 Hz, postictal slowing of the EEG persists over the occipital areas, with interspersed spike and wave complexes. (Bottom) Patient’s drawing representing “phosphorescent multicolored spots moving across the visual field.” (Contributed by Dr. Renzo Guerrini.)