What is the role of imaging studies in the workup of transient global amnesia (TGA)?

Updated: Jul 27, 2018
  • Author: Roy Sucholeiki, MD; Chief Editor: Helmi L Lutsep, MD  more...
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Answer

Any patient presenting with features of transient global amnesia should receive an imaging test to rule out a stroke possibility, especially if significant risk factors are present.

MRI with DWI can readily demonstrate acute ischemic changes early and guide management. In one study, higher resolution DWI imaging increased detection of hippocampal lesions in 27 patients with transient global amnesia, from 11 with standard resolution MRI to 22 with high resolution MRI. [19] If an MRI cannot be obtained readily, then at least a CT scan should be done initially if the patient is presenting to an emergency department.


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