Subarachnoid HemorrhageVasospasm, IntracranialSubarachnoid SpaceIntracranial AneurysmAneurysm, RupturedCerebral HemorrhageBasilar ArteryCerebral AngiographyHemorrhageCoronary VasospasmCerebral ArteriesTomography, X-Ray ComputedCisterna MagnaIschemic Attack, TransientRupture, SpontaneousIntracranial HemorrhagesPostoperative ComplicationsSubarachnoid Hemorrhage, TraumaticHydrocephalusGlasgow Outcome ScaleSpinal PunctureTreatment OutcomeCerebrovascular CirculationNimodipineAngiography, Digital SubtractionIntracranial PressureSurgical InstrumentsBrain IschemiaVentriculostomyEmbolization, TherapeuticRetrospective StudiesPregnatrienesRetinal HemorrhageProspective StudiesTime FactorsGlasgow Coma ScaleCerebral InfarctionNeurosurgical ProceduresUltrasonography, Doppler, TranscranialVertebral ArteryVitreous HemorrhageCraniotomyHematoma, SubduralPapaverineBrainPostpartum HemorrhageHematomaGastrointestinal HemorrhageArachnoidCerebrovascular DisordersHeadacheVasoconstrictionFollow-Up StudiesIntracranial Hemorrhage, HypertensiveRisk FactorsSpasmMiddle Cerebral ArteryDisease Models, AnimalVertebral Artery DissectionCerebrospinal FluidIntracranial Arteriovenous MalformationsMagnetic Resonance ImagingHeadache Disorders, PrimaryVentriculoperitoneal ShuntIntracranial HypertensionIntraoperative ComplicationsAcute DiseaseBrain EdemaEye HemorrhageFatal OutcomeIncidenceCerebral VentriculographyCortical Spreading DepressionConsciousness DisordersCerebral VentriclesNeurosurgeryAngiographyNicardipineRecurrenceDogsPosterior Cerebral ArteryMagnesium SulfateStrokePutaminal HemorrhageBrain InjuriesDioxanesAneurysmPredictive Value of TestsMeningesVasodilator AgentsPrognosisAnterior Cerebral ArteryNeurologic ExaminationCarotid Artery, InternalPerfusion ImagingSeverity of Illness IndexHemosiderinInfusions, Intra-ArterialPostoperative HemorrhageComa