Subarachnoid HemorrhageVasospasm, IntracranialSubarachnoid SpaceIntracranial AneurysmAneurysm, RupturedCerebral AngiographyGlasgow Outcome ScaleCerebral HemorrhageHydrocephalusRupture, SpontaneousBasilar ArteryTomography, X-Ray ComputedSpinal PunctureCisterna MagnaHemorrhageVentriculostomyCerebral ArteriesBrain IschemiaNimodipineMagnesium SulfateCerebrovascular CirculationSurgical InstrumentsPregnatrienesSubarachnoid Hemorrhage, TraumaticAngiography, Digital SubtractionIschemic Attack, TransientGlasgow Coma ScaleIntracranial PressureTreatment OutcomeProspective StudiesIntracranial HemorrhagesUltrasonography, Doppler, TranscranialIntracranial HypertensionCerebral InfarctionNeurosurgical ProceduresVentriculoperitoneal ShuntHypovolemiaCortical Spreading DepressionTime FactorsBrainDioxanesRetrospective StudiesEmbolization, TherapeuticArachnoidThird VentricleHematoma, SubduralNicardipinePapaverineVertebral ArteryPredictive Value of TestsNervous System DiseasesRisk FactorsRetinal HemorrhagePerfusion ImagingCraniotomyPituitary Function TestsMicrodialysisVitreous HemorrhageTranexamic AcidMiddle Cerebral ArteryPrognosisHeadacheFollow-Up StudiesVertebral Artery DissectionEndovascular ProceduresMeteorological ConceptsIncidenceRecurrenceCerebral VentriculographyBlood VolumeCerebrospinal FluidIntracranial Hemorrhage, HypertensiveCerebrovascular DisordersHemodilutionSeverity of Illness IndexCerebral VentriclesPostpartum HemorrhageAcute DiseaseHypopituitarismMeningesHeadache Disorders, PrimaryNeurosurgeryMagnetic Resonance ImagingHematomaCoagulation Protein DisordersIntracranial Arteriovenous MalformationsPostoperative ComplicationsGastrointestinal HemorrhageBrain EdemaConsciousness DisordersCohort StudiesAnesthesia, SpinalDrainageDisease Models, AnimalArachnoiditisVasodilator AgentsPosterior Cerebral ArteryHemosiderinPutaminal HemorrhageCerebral Aqueduct