Perimesencephalic and nonperimesencephalic nonaneurysmal subarachnoid hemorrhage (PM‐naSAH and NPM‐naSAH) have a different bleeding pattern and clinical course. The etiology and risk factors for PM‐naSAH and NPM‐naSAH are unclear. The objective… Click to show full abstract
Perimesencephalic and nonperimesencephalic nonaneurysmal subarachnoid hemorrhage (PM‐naSAH and NPM‐naSAH) have a different bleeding pattern and clinical course. The etiology and risk factors for PM‐naSAH and NPM‐naSAH are unclear. The objective of this study was to compare risk factors and triggering events between PM‐naSAH and NPM‐naSAH.
               
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