Some cases have reported persistence of memory dysfunction even after the condition has resolved.Rare instances of complete and permanent loss of memory have been reported in patients having recurrent attacks of transient global amnesia.Patients may have difficulty in recalling events that occurred in the past few hours, days or months before the attack of amnesia. There may be partial loss of long-term memory.About one-fourth of patients who encounter a transient global ischemia develop the risk of having recurrent attacks. Most patients do not experience recurrence.Since there is a temporary loss of memory, the patient cannot recollect events that happened during the episode of amnesia.Transient global amnesia is a benign condition which usually resolves by itself within 24 hours from onset of amnesia without the need for any medical assistance or intervention.Patients with recent head injury or active epilepsy are not to be included.Resolution of attack must occur within 24 hours.There should be the absence of epileptic features.No accompanying focal neurological symptoms are to be present during and after the attack.Cognitive impairment is limited to amnesia without loss of consciousness or alertness.Anterograde amnesia must be present during the attack.
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