THE AIM OF the present study was to analyze the clinical data on rebleeding in cerebral aneurysms during angiography and to evaluate the importance of the time interval between the latest rupture and angiography. Fourteen personal cases and 202 patients reported in the literature are reviewed. Rebleeding during angiography occurred most often (78percnt;) on Day O; 89percnt; bled when angiography was performed within 6 hours of the latest rupture. The prognosis in such ruptures was poor, with a mortality of 79percnt;. Intentional delay in angiography of at least 6 hours from the latest rupture is recommended if the associated hematoma is not large.
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