Subarachnoid HemorrhageSubarachnoid SpaceCerebral HemorrhageHemorrhageVasospasm, IntracranialIntracranial HemorrhagesIntracranial AneurysmAneurysm, RupturedRetinal HemorrhageCerebral AngiographyBasilar ArteryPostpartum HemorrhageVitreous HemorrhageGastrointestinal HemorrhageTomography, X-Ray ComputedEye HemorrhageHydrocephalusRupture, SpontaneousCerebral ArteriesSpinal PunctureCisterna MagnaSubarachnoid Hemorrhage, TraumaticIntracranial Hemorrhage, HypertensiveArachnoidHematomaGlasgow Outcome ScaleIntracranial PressureHematoma, SubduralBasal Ganglia HemorrhageVentriculostomyCerebral VentriclesBrain IschemiaCerebral VentriculographyEmbolization, TherapeuticIschemic Attack, TransientCerebrovascular CirculationTreatment OutcomePostoperative HemorrhageSurgical InstrumentsGlasgow Coma ScaleNeurosurgical ProceduresPutaminal HemorrhageCerebral InfarctionCraniotomyAnesthesia, SpinalBrainMagnetic Resonance ImagingAngiography, Digital SubtractionTime FactorsNimodipineProspective StudiesIntracranial Arteriovenous MalformationsCerebrospinal FluidChoroid HemorrhagePeptic Ulcer HemorrhageRetrospective StudiesCerebrovascular DisordersHeadacheMeningesArachnoiditisVertebral ArteryBrain EdemaVentriculoperitoneal ShuntCerebral Hemorrhage, TraumaticPregnatrienesStrokeHemosiderinIntracranial HypertensionFatal OutcomeAcute DiseaseDisease Models, AnimalRetrobulbar HemorrhageDura MaterRisk FactorsVertebral Artery DissectionNeurosurgeryHeadache Disorders, PrimaryFollow-Up StudiesConsciousness DisordersUltrasonography, Doppler, TranscranialNeurologic ExaminationCranial Fossa, PosteriorExtravasation of Diagnostic and Therapeutic MaterialsBrain InjuriesShock, HemorrhagicRecurrenceBrain Hemorrhage, TraumaticMiddle Cerebral ArteryHematoma, Subdural, IntracranialIncidenceCerebral AqueductAngiographyCerebrospinal Fluid PressureComaCortical Spreading DepressionOral HemorrhagePostoperative ComplicationsSubdural SpaceAnesthesia, ObstetricalPrognosis