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After eight (22%) of 37 procedures, new hyperintensities were visible on the diffusion-weighted MR images. With six of these eight procedures, the hyperintensities occurred in the vascular territory supplied by the treated vessel. In total , 35 new cerebral lesions could be seen, 33 (94%) of which occurred in the vascular territory supplied by the treated vessel. None of the patients in whom new diffusion abnormalities were found had new neurologic symptoms or deficits. No new lesions cou ld be seen after procedures at the subclavian artery. Revascularization procedures of arteries supplying the brain were associated with new lesions on the diffusion-weighted MR images of the brain after 22% of the procedures, provided that MR imaging cou ld be performed, indicating the occurrence of cerebral microemboli during such procedures. Diffusion-weighted MR imaging of the brain can be used as a tool to assess the impact of modifications of procedural technique and/or the use of cerebral protectio n devices on the occurrence of such lesions. |
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angiography,neurologic complications with
asymptomatic
cerebrovascular accident
cerebrovascular accident,silent
embolism
iatrogenic neurologic disorders
microemboli
MRI
MRI,abnormal
MRI,diffusion weighted
neuroradiology,interventional
stent,carotid artery
stent,carotid artery,complications
stent,subclavian artery
stent,vertebral artery
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