Subarachnoid hemorrhage

Subarachnoid hemorrhage (SAH) is bleeding into the subarachnoid space. This space is the area between the arachnoid membrane and the pia mater, which surrounds the brain.

Symptoms may include a severe headache, vomiting, loss of consciousness, fever, and sometimes seizures. Neck stiffness or neck pain are also common.[1] SAH causes troponin levels to rise.

References
  1. Carpenter CR, Hussain AM, Ward MJ, Zipfel GJ, Fowler S, Pines JM, Sivilotti ML (September 2016). "Spontaneous Subarachnoid Hemorrhage: A Systematic Review and Meta-analysis Describing the Diagnostic Accuracy of History, Physical Examination, Imaging, and Lumbar Puncture With an Exploration of Test Thresholds". Academic Emergency Medicine. 23 (9): 963–1003. doi:10.1111/acem.12984. PMC 5018921. PMID 27306497.
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