StrokeAHA/ASA GUIDELINE2023 Guideline for the Management of PatientsWith Aneurysmal Subarachnoid Hemorrhage:AGuideline From the American Heart Association/American Stroke AssociationThe American Academy of Neurology affimms the value of this statement as an educational tool for neurologists.The American Association of Neurological Surgeons/Congress of Neurological Surgeons Cerebrovascular Sectionaffirms the educational benefit of this document.Endorsed by the Neurocritical Care Society,Society of Neurointerventional Surgery,and Society of Vascular andInterventional NeurologyBrian L.Hoh,MD,MBA,FAHA,Chair;Nerissa U.Ko,MD,MAS,Vice Chair;Sepideh Amin-Hanjani,MD,FAHA';Sherry Hsiang-Yi Chou,MD,MSct;Salvador Cruz-Flores,MD,MPH,FAHA+;Neha S.Dangayach,MD,MBBS,MSCR;Colin P.Derdeyn,MD,FAHA;Rose Du,MD,PhD;Daniel Hanggi,MD,PhD;Steven W.Hetts,MDS:Nneka L lfejika,MD,MPH,FAHA;Regina Johnson,BS;Kiffon M.Keigher,DNP,MSN,ACNP-BC,RN;Thabele M.Leslie-Mazwi,MD;Brandon Lucke-Wold,MD,PhD;Alejandro A.Rabinstein,MD,FAHA;Steven A Robicsek,MD,PhD;Christopher J.Stapleton,MD;Jose I.Suarez,MD;Stavropoula I.Tjoumakaris,MD,FAHA;Babu G.Welch,MD#DownloadedAIM:The "2023 Guideline for the Management of Patients With Aneurysmal Subarachnoid Hemorrhage"replaces the2012 "Guidelines for the Management of Aneurysmal Subarachnoid Hemorrhage.The 2023 guideline is intendedfromto provide patient-centric recommendations for clinicians to prevent,diagnose,and manage patients with aneurysmalsubarachnoid hemorrhage.http:/METHODS:A comprehensive search for literature published since the 2012 guideline,derived from research principally/ahajoinvolving human subjects,published in English,and indexed in MEDLINE,PubMed,Cochrane Library,and other selecteddatabases relevant to this guideline,was conducted between March 2022 and June 2022.In addition,the guideline writingurnalsgroup reviewed documents on related subject matter previously published by the American Heart Association.Newer studiespublished between July 2022 and November 2022 that affected recommendation content,Class of Recommendation,orLevel of Evidence were included if appropriate.STRUCTURE:Aneurysmal subarachnoid hemorrhage is a significant global public health threat and a severely morbid and oftenMaydeadly condition.The 2023 aneurysmal subarachnoid hemorrhage guideline provides recommendations based on currentevidence for the treatment of these patients.The recommendations present an evidence-based approach to preventing.diagnosing,and managing patients with aneurysmal subarachnoid hemorrhage,with the intent to improve quality of careand align with patients'and their families'and caregivers'interests.Many recommendations from the previous aneurysmalsubarachnoid hemorrhage guidelines have been updated with new evidence,and new recommendations have been createdwhen supported by published data.Key Words:AHA Scientific Statements hematoma intracranial aneurysm intracranial hemorrhagessubarachnoid hemorrhage,aneurysmal vasospasm'AHA Stroke