Subarachnoid HemorrhageSubarachnoid SpaceVasospasm, IntracranialIntracranial AneurysmAneurysm, RupturedCerebral AngiographyBasilar ArterySubarachnoid Hemorrhage, TraumaticCisterna MagnaTomography, X-Ray ComputedSpinal PunctureArachnoidHydrocephalusCerebral ArteriesRupture, SpontaneousGlasgow Outcome ScaleIntracranial PressureAnesthesia, SpinalTreatment OutcomeIschemic Attack, TransientCerebral HemorrhageSurgical InstrumentsProspective StudiesCerebrospinal FluidCerebrovascular CirculationTime FactorsHeadacheArachnoiditisBrain IschemiaNimodipineVentriculostomyMeningesEmbolization, TherapeuticSeverity of Illness IndexAngiography, Digital SubtractionHematoma, SubduralMagnetic Resonance ImagingSymptom AssessmentBrainCerebral VentriculographyDepressionNeurosurgical ProceduresFollow-Up StudiesRetrospective StudiesCerebral InfarctionVertebral ArteryPregnatrienesCraniotomyGlasgow Coma ScaleRisk FactorsCerebral VentriclesDura MaterQuestionnairesVentriculoperitoneal ShuntVertebral Artery DissectionCerebrospinal Fluid PressureNeurosurgeryCerebrovascular DisordersHeadache Disorders, PrimaryCerebral AqueductAnesthesia, ObstetricalDisease Models, AnimalAcute DiseaseIntracranial HypertensionRecurrenceBehavioral SymptomsCerebrospinal Fluid ShuntsInjections, SpinalPsychiatric Status Rating ScalesUltrasonography, Doppler, TranscranialIncidenceConsciousness DisordersCortical Spreading DepressionNeurologic ExaminationBupivacaineSubdural SpacePredictive Value of TestsHemosiderinIntracranial HemorrhagesAge FactorsPrognosisCohort StudiesBrain InjuriesNervous System DiseasesFatal OutcomeBrain EdemaQuality of LifeMiddle Cerebral ArteryPrevalencePneumocephalusPapaverineVasoconstrictionArachnoid CystsPosterior Cerebral ArteryIntracranial Arteriovenous MalformationsMagnesium SulfateBrain DiseasesStrokePia MaterCranial Fossa, Posterior