Vertebral ArteryVertebral Artery DissectionVertebrobasilar InsufficiencyIntracranial AneurysmAneurysmArteriesCerebral AngiographyBasilar ArterySubclavian ArteryAneurysm, DissectingSubclavian Steal SyndromeEmbolization, TherapeuticAneurysm, InfectedLateral Medullary SyndromeAngiography, Digital SubtractionAngiographyCarotid ArteriesCerebral ArteriesCarotid Artery, InternalMagnetic Resonance AngiographySubarachnoid HemorrhageAortic AneurysmTomography, X-Ray ComputedPulmonary ArteryAneurysm, FalseCervical VertebraeArterial Occlusive DiseasesRenal ArteryBrain Stem InfarctionsCarotid Artery, Internal, DissectionCervical AtlasStentsFemoral ArteryAortic Aneurysm, ThoracicNeck InjuriesHeart AneurysmCarotid Artery DiseasesAxisFibromuscular DysplasiaCarotid Artery, CommonMesenteric ArteriesTreatment OutcomeAneurysm, RupturedIliac ArteryOccipital BoneBlood Vessel Prosthesis ImplantationMammary ArteriesCerebellar DiseasesIliac AneurysmBlood Vessel ProsthesisCerebral RevascularizationArteriovenous FistulaCoronary Artery BypassEndovascular ProceduresAtlanto-Axial JointVascular Surgical ProceduresConstriction, PathologicCarotid Artery, ExternalFollow-Up StudiesSplenic ArteryDoppler EffectRadial ArteryPercussionCoronary AneurysmIntracranial ArteriosclerosisUltrasonography, Doppler, ColorVertigoCerebral InfarctionCerebrovascular CirculationMagnetic Resonance ImagingAortographyAngioplasty, BalloonAtlanto-Occipital JointBalloon OcclusionUltrasonography, DopplerMastoidNeckSurgical InstrumentsRetrospective StudiesAngioplastyCeliac ArteryWounds, StabUltrasonography, Doppler, DuplexHepatic ArteryBrachial ArteryMesenteric Artery, SuperiorAortic RuptureCerebellumUltrasonographyRegional Blood FlowAorta, AbdominalHemifacial SpasmCerebrovascular DisordersIntracranial Embolism and ThrombosisBrain IschemiaInfarctionCircle of WillisOphthalmic ArteryTime FactorsCarotid Stenosis