Vertebral ArteryVertebral Artery DissectionSubclavian Steal SyndromeVertebrobasilar InsufficiencySubclavian ArteryCoronary-Subclavian Steal SyndromeCerebral AngiographySyndromeTomography, X-Ray ComputedArteriesBasilar ArteryLateral Medullary SyndromeMagnetic Resonance AngiographyCarotid ArteriesAneurysm, DissectingCerebral ArteriesPulmonary ArteryAngiographyCarotid Artery, InternalIntracranial AneurysmCervical VertebraeEmbolization, TherapeuticBrain Stem InfarctionsAngiography, Digital SubtractionCervical AtlasArterial Occlusive DiseasesNeck InjuriesSubarachnoid HemorrhageCarotid Artery, Internal, DissectionAxisRenal ArteryFemoral ArteryAneurysm, RupturedFibromuscular DysplasiaMesenteric ArteriesCarotid Artery, CommonOccipital BoneMammary ArteriesCarotid Artery DiseasesCerebellar DiseasesTreatment OutcomeStentsDown SyndromeMetabolic Syndrome XCoronary Artery BypassVentricular Function, LeftAneurysm, FalseConstriction, PathologicAtlanto-Axial JointIliac ArteryDoppler EffectVertigoFollow-Up StudiesRadial ArteryPercussionCarotid Artery, ExternalCerebral RevascularizationArteriovenous FistulaCerebral InfarctionIntracranial ArteriosclerosisAneurysmMagnetic Resonance ImagingUltrasonography, Doppler, Color