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  • Title: Computerized tomography in subarachnoid hemorrhage: difference between patients with and without an aneurysm on angiography.
    Author: van Gijn J, van Dongen KJ.
    Journal: Neurology; 1980 May; 30(5):538-9. PubMed ID: 7189259.
    Abstract:
    Fifty patients with spontaneous subarachnoid hemorrhage were investigated by both computerized tomography (CT), within 5 days of onset, and complete cerebral angiography. CT showed blood in the basal cisterns in 38 of the 42 patients with a demonstrable aneurysm, but in only 1 of 8 patients with a negative angiogram (p less than 0.001). This means that: (1) blood in the basal cisterns on CT almost certainly indicates a ruptured aneurysm, and (2) unexplained subarachnoid hemorrhages are unlikely to be caused by occult basal aneurysms.
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