Vertebral ArteryVertebral Artery DissectionVertebrobasilar InsufficiencyAngiographyCerebral AngiographyMagnetic Resonance AngiographyCoronary AngiographyAngiography, Digital SubtractionAneurysm, DissectingArteriesDissectionBasilar ArterySubclavian ArteryTomography, X-Ray ComputedSubclavian Steal SyndromeCarotid Artery, Internal, DissectionIntracranial AneurysmCarotid Artery, InternalLateral Medullary SyndromeCarotid ArteriesCerebral ArteriesEmbolization, TherapeuticArterial Occlusive DiseasesPulmonary ArterySubarachnoid HemorrhageStentsAneurysm, RupturedBrain Stem InfarctionsRenal ArteryNeck DissectionFluorescein AngiographyCervical VertebraeTreatment OutcomeFemoral ArteryNeck InjuriesFibromuscular DysplasiaAortic AneurysmCarotid Artery DiseasesCervical AtlasConstriction, PathologicCarotid Artery, CommonAxisAneurysm, FalseMesenteric ArteriesArteriovenous FistulaIliac ArteryFollow-Up StudiesContrast MediaMammary ArteriesOccipital BoneCoronary Artery BypassRetrospective StudiesCoronary VesselsSensitivity and SpecificityCerebellar DiseasesMagnetic Resonance ImagingAneurysmRadial ArteryIntracranial ArteriosclerosisCerebral InfarctionCerebral RevascularizationCarotid Artery, ExternalUltrasonography, Doppler, ColorAortographyCarotid StenosisAngioplasty, BalloonNeckImaging, Three-DimensionalUltrasonography, DopplerDoppler EffectUltrasonography, Doppler, DuplexCerebrovascular CirculationAtlanto-Axial JointIntracranial Arteriovenous MalformationsTime FactorsProspective StudiesCeliac ArteryCerebrovascular DisordersBlood Vessel Prosthesis ImplantationAortic Aneurysm, ThoracicCoronary StenosisVertigoCentral Nervous System Vascular MalformationsUltrasonographyMesenteric Artery, SuperiorPercussionBrain IschemiaHepatic ArteryRegional Blood FlowBlood Vessel ProsthesisUltrasonography, Doppler, TranscranialCircle of WillisSplenic ArteryBlood Flow VelocityCoronary DiseaseRadionuclide AngiographyRupture, SpontaneousVascular PatencyEndovascular ProceduresAorta, Thoracic