Subarachnoid HemorrhageIntracranial AneurysmAneurysm, RupturedVasospasm, IntracranialSubarachnoid SpaceCerebral AngiographyAneurysmEmbolization, TherapeuticCerebral HemorrhageAngiography, Digital SubtractionBasilar ArteryRupture, SpontaneousAneurysm, InfectedTomography, X-Ray ComputedSurgical InstrumentsCerebral ArteriesHemorrhageGlasgow Outcome ScaleNeurosurgical ProceduresAortic AneurysmTreatment OutcomeMagnetic Resonance AngiographyAneurysm, DissectingEndovascular ProceduresIntracranial HemorrhagesHeart AneurysmAortic Aneurysm, ThoracicSubarachnoid Hemorrhage, TraumaticSpinal PunctureHydrocephalusMechanical ThrombolysisRetrospective StudiesCarotid Artery, InternalIschemic Attack, TransientCraniotomyImaging, Three-DimensionalVertebral ArteryFollow-Up StudiesCerebrovascular CirculationPosterior Cerebral ArteryCisterna MagnaIliac AneurysmProspective StudiesBrain IschemiaTime FactorsIntracranial PressureAnterior Cerebral ArteryStentsIntracranial Arteriovenous MalformationsVascular Surgical ProceduresAngiographyIntracranial ThrombosisCoronary AneurysmBlood Vessel ProsthesisBalloon OcclusionPostoperative ComplicationsRisk FactorsGlasgow Coma ScalePlatinumVentriculostomyRetreatmentCircle of WillisBlood Vessel Prosthesis ImplantationRetinal HemorrhageNimodipineAneurysm, FalseMicrosurgeryRecurrenceCerebral RevascularizationHematoma, SubduralMagnetic Resonance ImagingVitreous HemorrhageCerebral InfarctionVertebral Artery DissectionAortic RuptureNeurologic ExaminationBrainCerebrovascular DisordersCarotid Artery DiseasesMiddle Cerebral ArteryArachnoidPostpartum HemorrhagePregnatrienesIntracranial Hemorrhage, HypertensiveEquipment DesignHematomaHeadacheDisease Models, AnimalUltrasonography, Doppler, TranscranialIncidenceSensitivity and SpecificityGastrointestinal HemorrhageBasal Ganglia HemorrhageAminocaproatesAorta, AbdominalIntraoperative ComplicationsPredictive Value of TestsNeurosurgeryFatal OutcomeEquipment Failure Analysis