Representative patterns observed on EEGs. (A) Diffuse slowing and cardiac arrythmia. (B) Focal slowing indicated by boxes and epileptiform discharges indicated by arrow. (C-D) Nonconvulsive status epilepticus (C) and response to 2 mg IV lorazepam (D). Montage shown: longitudinal bipolar, left central/right central, left temporal/right temporal chain: 70 µV/cm voltage, 30 mm/s.