ABSTRACT
Objective To investigate the etiology and clinical features of transient global amnesia.Methods Seven patients diagnosed as transient global amnesia were analyzed by EEG,TCD,MRI or CT examination,five pa- tients analyzed by single photon emission computed tomography(SPECT).EEG and TCD examination were done within 24 hours during the attack.And SPECT,MRI or CT examination were done within 1 week during the at- tack.Results Six patients showed normal EEG,one patient showed a few slow waves;seven patients showed verte- brobasilar ischemia in TCD;six patients showed normal but one patient showed lacunar infarction in brain CT or MRI;five patients showed significant hypoperfusion in different encephalic region in brain SPECT.They were all fol- lowed up for three to tewty-four months respectively,six patients had no recurrence,but one patient recurred one time and the SPECT demonstrated a decreased cerebral blood flow in the left temporal lobe.Conclusion Transient global amnesia patients showed cerebral ischemia.Transient global amnesia may be related to the decrease of rCBF in the temporal lobe or the temporal hippocampus.