Changes on diffusion-weighted MRT (DWI) in the hippocampus in transient global amnesia

Abstract

Transient global amnesia (TGA) is considered as one of the variants of transient ischemic attack (TIA). Unlike the diagnosis of cerebral infarction, the definition of TIA presupposes not only the reversibility of neurological symptoms, but also the absence of morphological signs of cerebral infarction detected by imaging methods. While the clinical diagnosis of TGA is not difficult, there is no clear opinion regarding changes on MRI. The use of high-field MRI devices (3T, 7T) shows a fairly high frequency of detecting point DWI changes in the hippocampal projection (up to 50%), which can be used as one of the objective criteria for the diagnosis of TGA

Keywords

• transient global amnesia
• ischemic stroke
• mri