Transient Global Amnesia Following Subarachnoid Hemorrhage

ABSTRACT

The etiology and pathogenesis of transient global amnesia (TGA) is still unclear. Several mechanisms have been proposed, including arterial thromboembolic ischemic attacks, epilepsy, and migraine. However, TGA following severe headache has not been reported, to our knowledge. We described a patient presenting with TGA associated with the sudden onset of headache provoked by a subarachnoid hemorrhage. MRI and CT with angiography of the brain showed no abnormal findings. CSF study revealed hemorrhage. Single photon emission computed tomography revealed mild low perfusion at both hippocampal regions.