No abstract available.
Infarction* ; Middle Cerebral Artery*

Objective: To assess fluid-attenuated inversion recovery (FLAIR) vascular hyper-intensity (FVH) and explore its relationship with CT perfusion (CTP) penumbral/infarct core mismatch ratio and diffusion weighted imaging (DWI) final infarct volume in acute ischemic stroke (AIS) patients with middle cerebral artery occlusion (MCAO). Methods: The CTP and MRI images of 38 AIS patients with MCAO were reviewed. The FVH score (longitudinal direction) [FVH score (L)] and FVH score (transverse direction) [FVH score (T)] were quantified on the FLAIR images. The FVH score (L) (range, 0-16) was based on a rostrocaudal extension of FVH and the FVH score (T) (range, 0-3) was based on FVH supply of the occluded MCA territory. The mismatch ratio was calculated from the ratio of the [mean transit time - cerebral blood volume (CBV)] lesion/CBV lesion on the CTP images. The DWI infarct volume was measured on the DWI images. Results: The mismatch ratio was larger for the group of FVH score (L)=7~8 than those of FVH score (L)=5~6 and FVH score (L)=3~4 (p=0.03), whereas the DWI infarct volume was smaller (p=0.04). Similarly, the mismatch ratio of FVH score (T)=2~3 group was larger than FVH score (T)=1 group (p=0.01), whereas the DWI infarct volume was smaller (p=0.02). Both FVH score (L) and FVH score (T) correlated positively with mismatch ratio (P=0.02, P=0.001, respectively), but negatively with DWI infarct volume (P=0.03, P=0.004, respectively). Conclusions: Higher FVH score is associated with larger mismatch ratio and smaller DWI infarct volume in AIS patients with MCAO. FLAIR vascular hyperintensity may represent collateral arterial circulation, and may play a role in protecting the ischemic penumbra.
Infarction, Middle Cerebral Artery

No abstract available.
Atherosclerosis ; Cerebral Angiography ; Infarction, Middle Cerebral Artery

Early spontaneous recanalization of the middle cerebral artery in acute ischemic phase artery is not uncommon, whereas the late spontaneous recanalization of chronic occluded artery is a very rare phenomenon and exact incidence and the timing of this event have not been quantified. We present a case in which late spontaneous recanalization of long-lasting middle cerebral artery occlusion occurred in the absence of surgical, endovascular and thrombolytic treatments.
Angiography ; Arteries ; Incidence ; Infarction, Middle Cerebral Artery ; Middle Cerebral Artery

No abstract available.
Brain ; Brain Neoplasms ; Cerebral Infarction ; Infarction, Middle Cerebral Artery ; Middle Cerebral Artery ; Vasospasm, Intracranial

No abstract available.
Ataxia* ; Cerebellar Ataxia ; Infarction* ; Middle Cerebral Artery*

The spot sign refers to tiny enhanced foci within the hematoma on a brain computed tomography angiography image. A spot sign is usually considered to be associated with hematoma progression in patients with acute intracerebral hemorrhage. We describe a patient with infarction of the left middle cerebral artery where a spot sign was observed. A spot sign may also have significant predictive value for large hemorrhagic transformation in patients with ischemic stroke.
Angiography* ; Brain* ; Cerebral Hemorrhage ; Cerebral Infarction ; Hematoma ; Humans ; Infarction ; Infarction, Middle Cerebral Artery* ; Middle Cerebral Artery ; Stroke

Hyperintense vessels are frequently observed on fluid-attenuated inversion recovery imaging in acute ischemic stroke patients. Some investigators suggest that a hyperintense vessel sign in patients with middle cerebral arterial occlusion results from collateral blood flow originating in neighboring arterial territories, especially via pial collaterals. We report two cases of acute proximal middle cerebral arterial infarction that exhibited hyperintense vessels signs on fluid-attenuated inversion recovery imaging accompanying pial collaterals as confirmed by cerebral angiography.
Cerebral Angiography ; Cerebral Infarction ; Collateral Circulation ; Glycosaminoglycans ; Humans ; Infarction ; Infarction, Middle Cerebral Artery ; Middle Cerebral Artery ; Research Personnel ; Stroke

Apraxia of eyelid closure is an uncommon condition characterized by difficulties in voluntary eye closing with preserved normal blinking. Meige's syndrome is a disorder of adults, and is characterized by prolonged symmetric dystonic contraction of the orofacial muscles and blepharospasm. We report a case of apraxia of eyelid closure on the right eye with Meige's syndrome on the left eye complicating a left middle cerebral artery territory infarction.
Adult ; Apraxias* ; Blepharospasm ; Blinking ; Eyelids* ; Humans ; Infarction ; Infarction, Middle Cerebral Artery* ; Middle Cerebral Artery ; Muscles

Spontaneous dissection of the middle cerebral artery could result in thromboembolic stroke caused by the intramural hematoma. Dissection should be considered as a possible etiology in a young stroke patient, but it is not straightforward in an emergency situation. Moreover, the efficacy and safety of thrombolytic treatment in the acute stage are unknown. We applied intravenous and intra-arterial stent thrombectomy with the Solitaire device successfully in a patient with acute left middle cerebral artery occlusion due to spontaneous dissection.
Emergencies ; Hematoma ; Humans ; Infarction* ; Infarction, Middle Cerebral Artery ; Middle Cerebral Artery* ; Stents* ; Stroke ; Thrombectomy*