We report here on the case of a patient who, 10 days prior to his admission to hospital, had suffered a bicycle accident. He presented with signs of minor dysphasia. A brain CT-scan revealed slight subarachnoid hemorrhage (SAH) in the left sylvian fissure as well as narrowing of the distal M1 segment of the left middle cerebral artery (MCA) on CT-angiography. MRI showed diffusion abnormalities and hypoperfusion in the left MCA territory with cortical hyperperfusion on arterial spin labeling (ASL). Arteriography confirmed the vasospasm, but showed no sign of aneurysm. Angioplasty of the narrowed MCA was successful, and follow-up MRI showed reperfusion of the MCA territory.
Keywords : Arterial spin labeling, Vasospasm, MRI, Diffusion, Perfusion, Subarachnoid hemorrhage
| Étude soutenue par le Fonds national de la recherche scientifique en Suisse (SNF) : multimodality MR imaging in tissue characterization after stroke SNF 320000-121565.