ThrombectomyBasilar ArteryVertebrobasilar InsufficiencyPosterior Cerebral ArteryVertebral ArteryInfarction, Posterior Cerebral ArteryCerebral AngiographyIntracranial AneurysmBrain Stem InfarctionsCerebral ArteriesArteriesSubarachnoid HemorrhageMagnetic Resonance AngiographyCerebrovascular CirculationMechanical ThrombolysisBrain InfarctionAneurysm, RupturedCerebral InfarctionIntracranial ArteriosclerosisStrokeEmbolization, TherapeuticTomography, X-Ray ComputedMoyamoya DiseaseCarotid Artery, InternalBrain IschemiaTreatment OutcomeVertebral Artery DissectionAnterior Cerebral ArteryIliac VeinCerebral RevascularizationSuctionArterial Occlusive DiseasesAngiographyIntracranial ThrombosisMagnetic Resonance ImagingStentsIntracranial EmbolismUltrasonography, Doppler, TranscranialAcute DiseaseFemoral ArteryRetrospective StudiesAngiography, Digital SubtractionPulmonary ArteryConstriction, PathologicIschemic Attack, TransientThrombosisCarotid ArteriesFollow-Up StudiesThrombolytic TherapyFemoral VeinEmbolectomyCerebrovascular DisordersAneurysm, DissectingVasospasm, IntracranialMesenteric ArteriesProspective StudiesRenal ArteryVenous ThrombosisIliac ArteryCoronary ThrombosisCathetersVasodilationBlood CirculationVascular PatencyVasoconstrictionCranial Fossa, PosteriorBrainRecurrenceRisk FactorsTime FactorsCerebellumPhlebographyEmbolismMiddle Cerebral ArteryMuscle, Smooth, VascularFibrinolytic AgentsDogsCoronary Artery BypassAngioplasty, BalloonCoronary VesselsPopliteal ArteryRegistriesCatheterizationCarotid Artery DiseasesVasodilator AgentsPredictive Value of TestsArteriovenous Shunt, SurgicalCoronary AngiographyMyocardial InfarctionRadial ArteryEquipment DesignMammary ArteriesVena Cava, InferiorSagittal Sinus ThrombosisGraft Occlusion, VascularSerotoninSubclavian ArteryCircle of WillisCoronary CirculationPulmonary Circulation