Abnormal, localized dilation or outpouching of cerebral artery wall:
Occurs in 5–10% of population
Rupture of saccular aneurysms account for 5–15% of strokes
Of those that rupture:
Commonly asymptomatic before rupture
Sentinel headaches occur in 30–60% of patients before rupture:
Can be unilateral
Seizures, syncope, or altered level of consciousness
Neurologic examination in the field can be extremely helpful
Level of consciousness
Glasgow coma scale score
Gross motor deficits
Any patient with acute aneurysmal subarachnoid hemorrhage should be admitted, preferably to ICU
Any patient with symptomatic unruptured aneurysm should receive ad...
CT scan alone is not sufficient to exclude subarachnoid hemorrhage
Vasospasm is typically seen on day 3 after bleed or surgery
Nimodipine can prevent or treat vasospasm but should ne...
Backes D, Rinkel GJ, Kemperman H, et al. Time-dependent test characteristics of head computed tomography in patients suspected of nontraumatic subarachnoid hemorrhage. Stroke. ...
430 Subarachnoid hemorrhage
437.3 Cerebral aneurysm, nonruptured
747.81 Anomalies of cerebrovascular system
I60.7 Nontraumatic subarachnoid hemorrhage from unspecified intracranial artery
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