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Computed tomography was performed on 1,378 patients admitted within 3 days of subarachnoid hemorrhage (SAH) at 71 centers in a cooperative study. CT on the day of SAH (day 0) was abnormal in 95.8%. Intracranial blood was detected in 95.3% of patients on day 0, 90.5% on the first day after SAH (day 1), and 73.8% on day 3. CT was normal in only 1 of 284 patients in stupor or coma but was normal in 14.6% of 638 alert patients. In the first few days after SAH, CT is highly accurate, often obviating the need of CSF examinations. The interval from SAH until CT and the seriousness of the patient's condition are two factors that influence the results of CT.

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The overall results are presented of early medical management and delayed operation among 249 patients studied during the period 1974 to 1977, treated within 3 days of subarachnoid hemorrhage (SAH) and evaluated 90 days after aneurysm rupture. The results included 36.2% mortality, 17.9% survival with serious neurological sequelae, and 46% with a favorable outcome. Of the patients admitted in good neurological condition, 28.7% had died and only 55.7% had a favorable recovery at 90 days after SAH. These figures represent the results despite effective reduction in early rebleeding by antifibrinolytic therapy and successful surgery in those patients reaching operation. Further therapeutic advances are needed for patients hospitalized within a few days after SAH.

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