Abstract
BACKGROUND AND PURPOSE - Lesions in diffusion-weighted imaging (DWI-L) have been commonly described in transient global amnesia (TGA). We investigated a possible relationship between brain ischemia and TGA. METHODS - Twenty-eight patients underwent transcranial and carotid Doppler ultrasonography (including microembolus detection) and MRI within 24 hours of TGA onset (including DWI, perfusion-weighted imaging and angio-MRI). MRI was repeated at 48 to 96 hours (21 patients) and 30 days (18 patients). RESULTS - Punctate DWI-L were observed in 16 patients (57%) and were not attributable to perfusion abnormalities, arterial stenoses or underlying cardioembolic disease. MRIs performed between 12 and 72 hours showed the highest frequency of DWI-L (88%; P<0.001). No pathological findings were observed at 30 days. CONCLUSIONS - These results suggest that TGA is not related to cerebral arterial ischemia. © 2008 American Heart Association, Inc.
Original language | English |
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Pages (from-to) | 476-479 |
Journal | Stroke |
Volume | 39 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 Feb 2008 |
Keywords
- Brain ischemia
- Neuroimaging and MRI
- Transient global amnesia
- Transient ischemic attack