Cerebral AngiographyRadial ArteryAngiographyCoronary AngiographyMagnetic Resonance AngiographyAngiography, Digital SubtractionCerebral ArteriesIntracranial AneurysmCerebral InfarctionSubarachnoid HemorrhageIntracranial Arteriovenous MalformationsTomography, X-Ray ComputedFemoral ArteryUlnar ArteryCerebrovascular CirculationCerebral VeinsCranial SinusesVertebral ArteryMoyamoya DiseaseCarotid Artery, InternalCerebral HemorrhagePosterior Cerebral ArteryArterial Occlusive DiseasesIschemic Attack, TransientCircle of WillisCentral Nervous System Vascular MalformationsCerebrovascular DisordersSpasmPercutaneous Coronary InterventionMiddle Cerebral ArteryAneurysm, RupturedAngioplasty, Balloon, CoronaryTreatment OutcomeCathetersBrain IschemiaCardiac CathetersCardiac CatheterizationFluorescein AngiographyIntracranial Embolism and ThrombosisCerebral RevascularizationMagnetic Resonance ImagingVasospasm, IntracranialBasilar ArteryCatheterization, PeripheralEmbolization, TherapeuticCerebral Arterial DiseasesRadiography, InterventionalAnterior Cerebral ArteryCerebral PalsyProspective StudiesVasculitis, Central Nervous SystemCarotid Artery DiseasesBrainContrast MediaLeriche SyndromeCarotid StenosisConstriction, PathologicFeasibility StudiesVertebrobasilar InsufficiencyCatheterizationSinus Thrombosis, IntracranialIntracranial ArteriosclerosisVascular System InjuriesRetrospective StudiesBlindness, CorticalCoronary StenosisCoronary Artery DiseaseCraniotomyArteriovenous FistulaEpilepsy, Tonic-ClonicStentsEndarterectomyCollateral CirculationArteriovenous MalformationsBlood Flow VelocityArtificial LimbsCarotid ArteriesTime FactorsIntracranial EmbolismNeurologic ExaminationNeurosurgical ProceduresVascular Access DevicesPuncturesHematoma, SubduralCranial Fossa, AnteriorInfarction, Middle Cerebral ArterySensitivity and SpecificityCarotid-Cavernous Sinus FistulaHemostatic TechniquesFollow-Up StudiesCavernous SinusVertebral Artery DissectionMalaria, CerebralSurgical InstrumentsTemporal ArteriesHematoma, Subdural, IntracranialIsosorbideRisk FactorsComaLearning Curve