Convulsions are commonly precipitated in terminal renal failure by:
In setting of terminal renal failure, the volume overload in combination with damage to blood brain barrier leads to cerebral edema which leads to seizures. The problem will be compounded by hypeensive state that leads to increase cerebral flow and resultant worsening of cerebral edema.
Hyperkalemia
Hypokalemia
Water intoxication
Hypermagnesemia
Electrolyte Imbalance