Vertebral ArteryVertebral Artery DissectionVertebrobasilar InsufficiencyArteriesBasilar ArterySubclavian ArteryCerebral AngiographySubclavian Steal SyndromeLateral Medullary SyndromeCarotid ArteriesMagnetic Resonance AngiographyAneurysm, DissectingCerebral ArteriesPulmonary ArteryAngiographyCarotid Artery, InternalIntracranial AneurysmCervical VertebraeEmbolization, TherapeuticAngiography, Digital SubtractionBrain Stem InfarctionsCervical AtlasArterial Occlusive DiseasesNeck InjuriesTomography, X-Ray ComputedSubarachnoid HemorrhageCarotid Artery, Internal, DissectionAxisRenal ArteryFemoral ArteryMesenteric ArteriesFibromuscular DysplasiaAneurysm, RupturedCarotid Artery, CommonOccipital BoneMammary ArteriesCarotid Artery DiseasesStentsCerebellar DiseasesVentricular Function, LeftAneurysm, FalseCoronary Artery BypassIliac ArteryAtlanto-Axial JointConstriction, PathologicTreatment OutcomeDoppler EffectPercussionRadial ArteryCarotid Artery, ExternalVertigoCerebral RevascularizationArteriovenous FistulaIntracranial ArteriosclerosisAneurysmCerebral InfarctionUltrasonography, Doppler, ColorAtlanto-Occipital JointVentricular Dysfunction, LeftCerebrovascular CirculationMastoidUltrasonography, DopplerAngioplasty, BalloonFollow-Up StudiesNeckMagnetic Resonance ImagingWounds, StabCoronary VesselsRegional Blood FlowSplenic ArteryUltrasonographyBrachial ArteryHemifacial SpasmCerebellumCerebrovascular DisordersHepatic ArteryBrain IschemiaInfarctionUltrasonography, Doppler, DuplexCarotid StenosisUltrasonography, Doppler, TranscranialIntracranial Embolism and ThrombosisBlood Flow VelocityHeadacheBalloon OcclusionCeliac ArteryTime FactorsRetrospective StudiesOphthalmic ArteryBone ScrewsMesenteric Artery, SuperiorSpinal InjuriesHemodynamicsCarotid Artery InjuriesAngioplastyBrachiocephalic TrunkHypertrophy, Left VentricularWounds, NonpenetratingDogsStroke