Radial ArteryCerebral AngiographyAngiographyMagnetic Resonance AngiographyCerebral ArteriesCoronary AngiographyAngiography, Digital SubtractionArteriesIntracranial AneurysmCerebral InfarctionUlnar ArteryTomography, X-Ray ComputedSubarachnoid HemorrhageIntracranial Arteriovenous MalformationsVertebral ArteryCarotid Artery, InternalBasilar ArteryMammary ArteriesCarotid ArteriesMiddle Cerebral ArteryCerebrovascular CirculationCoronary Artery BypassArterial Occlusive DiseasesCerebral VeinsCranial SinusesMoyamoya DiseaseSpasmCarotid Artery DiseasesIschemic Attack, TransientCerebral HemorrhageCircle of WillisAneurysm, RupturedCerebrovascular DisordersPosterior Cerebral ArteryCentral Nervous System Vascular MalformationsTissue and Organ HarvestingBrain IschemiaFemoral ArteryPulmonary ArteryTreatment OutcomeCerebral RevascularizationEmbolization, TherapeuticMagnetic Resonance ImagingVascular PatencyIntracranial Embolism and ThrombosisCerebral Arterial DiseasesFluorescein AngiographyCarotid StenosisVasospasm, IntracranialBlood Flow VelocityRadial NerveCatheterization, PeripheralRenal ArteryThoracic ArteriesProspective StudiesBrainContrast MediaVertebrobasilar InsufficiencyArteriovenous FistulaTime FactorsAnterior Cerebral ArteryCerebral PalsyTemporal ArteriesBrachial ArteryVasculitis, Central Nervous SystemFollow-Up StudiesConstriction, PathologicInfarction, Middle Cerebral ArteryIntracranial ArteriosclerosisMesenteric ArteriesCatheterizationRetrospective StudiesRegional Blood FlowSinus Thrombosis, IntracranialCoronary VesselsEndarterectomySaphenous VeinCraniotomyBlindness, CorticalSensitivity and SpecificityArteriovenous MalformationsIntracranial EmbolismVertebral Artery DissectionEpilepsy, Tonic-ClonicIliac ArteryBlood PressureCollateral CirculationNeurologic ExaminationNeurosurgical ProceduresGraft Occlusion, VascularHematomaCarotid Artery, CommonCoronary Artery DiseaseCarotid Artery ThrombosisCoronary StenosisVasodilationCoronary DiseaseHematoma, SubduralCranial Fossa, AnteriorRisk Factors