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Perimesencephalic Hemorrhage, Exclusion of Vertebrobasilar Aneurysms with CT Angiography Stroke 30:1103-1109, Velthuis,B.K.,et al, 1999 See this aricle in Pubmed Article Abstract Observers agreed in 38 of 40 patients (95%) in differentiating perimesencephalic and nonperimesencephalic patterns of hemorrhage on unenhanced CT. On the CT angiograms, both observers detected a vertebrobasilar aneurysm in 16 patients and no aneurysm in 24 patients. These findings were confirmed by DSA or autopsy. No patients with a perimesencephalic pattern of hemorrhage were found to have an aneurysm on either CT angiography or DSA. Good recognition of a perimesencephalic pattern of h emorrhage is possible on unenhanced CT, and CT angiography accurately excludes and detects vertebrobasilar aneurysms. DSA can be withheld in patients with a perimesencephalic pattern of hemorrhage and negative CT angiography.

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(click to filter results - removes previous filter) aneurysm aneurysm,intracranial aneurysm,vertebral basilar system CAT scan CAT scan,angiography subarachnoid hemorrhage subarachnoid hemorrhage,perimesencephalic

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