The clinical picture was compared to angiographic findings on the spasm in 85 patients in acute period of an aneurysmal rupture in the absence of the intracranial hematoma. Spasm-induced ischemia was responsible for cerebral dysfunction and neurological symptoms. Days 5-13 since the aneurysmal rupture can be viewed as a functionally significant spasm interval. To prevent repeat hemorrhages and brain ischemia, aneurysmal intervention should be conducted on early hours and days of the disease, before or during a less severe vascular spasm.
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