neurologic disorders
Subarachnoid Hemorrhage (SAH)
Key Points
Possible complications after subarachnoid hemorrhage include chemical meningitis, vasospasm, hydrocephalus, rebleeding, seizures, and brain edema. Suspect subarachnoid hemorrhage if headache is severe at onset and reaches peak intensity within seconds or causes loss of consciousness. If subarachnoid hemorrhage is confirmed, image both carotid and both vertebral arteries using conventional cerebral angiography, magnetic resonance angiography, or CT angiography because many patients have multiple aneurysms. If possible, send patients to a comprehensive stroke center for treatment. 