<prompt> The definition of prolonged seizures following ECT is:90 seconds150 seconds120 seconds180 seconds  <response>: Prolonged seizures - seizures lasting more than 180 seconds Prolonged seizures can be terminated either with additional doses of the barbiturate anesthetic agent or with IV diazepam Methohexital can also be used to abo prolonged seizures in ECT or to limit postictal agitation. Extra edge: Tardive Seizures Additional seizures appearing some time after the ECT treatment This may occur in patients with preexisting seizure disorders 