Evaluation of an anatomic definition of non-aneurysmal perimesencephalic subarachnhoid hemorrhage

摘要

Background and purpose Perimesencephalic subarachnoid hemorrhage (PSAH) is not consistently defined in the existing literature. The purpose of this study was to test the inter-observer variability and specificity for non-aneurysmal subarachnoid hemorrhage (SAH) of an anatomic definition of PSAH.