Subarachnoid HemorrhageIntracranial AneurysmVasospasm, IntracranialAneurysm, RupturedSubarachnoid SpaceCerebral AngiographyAneurysmEmbolization, TherapeuticCerebral ArteriesCerebral HemorrhageSurgical InstrumentsBasilar ArteryTomography, X-Ray ComputedAneurysm, InfectedAngiography, Digital SubtractionHemorrhageRupture, SpontaneousGlasgow Outcome ScaleCerebrovascular CirculationAortic AneurysmNeurosurgical ProceduresCerebral InfarctionTreatment OutcomeCraniotomyIntracranial HemorrhagesEndovascular ProceduresBrain IschemiaAneurysm, DissectingAortic Aneurysm, ThoracicHeart AneurysmSubarachnoid Hemorrhage, TraumaticHydrocephalusMiddle Cerebral ArterySpinal PunctureAnterior Cerebral ArteryBrainVertebral ArteryIschemic Attack, TransientCisterna MagnaIntracranial PressurePlatinumRetrospective StudiesCircle of WillisTime FactorsCarotid Artery, InternalIliac AneurysmMagnetic Resonance AngiographyMagnetic Resonance ImagingCerebral VeinsFollow-Up StudiesVascular Surgical ProceduresMicrosurgeryNeurosurgeryNimodipineAngiographyCoronary AneurysmIntracranial Arteriovenous MalformationsCerebrovascular DisordersProspective StudiesVentriculostomyBlood Vessel Prosthesis ImplantationImaging, Three-DimensionalPostoperative ComplicationsRetinal HemorrhageRecurrenceAneurysm, FalseHematoma, SubduralDisease Models, AnimalFatal OutcomePosterior Cerebral ArteryBlood Vessel ProsthesisIntracranial ThrombosisGlasgow Coma ScaleVitreous HemorrhageRetreatmentCerebral PalsyVertebral Artery DissectionRisk FactorsStentsAortic RuptureCerebral RevascularizationCerebral VentriclesArachnoidBrain EdemaPregnatrienesNeurologic ExaminationBlood Flow VelocityHeadacheIntracranial Hemorrhage, HypertensivePostpartum HemorrhageHematomaBalloon OcclusionIncidenceCarotid Artery DiseasesGastrointestinal HemorrhageEquipment DesignModels, CardiovascularAorta, AbdominalLigationIntracranial Hypertension