Periodic lateralized epileptiform discharges in EEG during recovery from hyponatremia: a case report.

PLEDs were observed in a case of undifferentiated schizophrenia, transiently during the course of recovery from hyponatremia, and diffuse EEG slowing remained even after the serum sodium had returned to normal range. It was considered that PLEDs had occurred transiently in relation to hemispheric ischemic disturbance induced by hyponatremia. The characteristics of PLEDs associated with hyponatremia will need to be studied further in more patients with hyponatremia.