Vertebral ArteryVertebral Artery DissectionIntracranial AneurysmAneurysmVertebrobasilar InsufficiencyAneurysm, DissectingAortic AneurysmCerebral AngiographyAneurysm, InfectedArteriesDissectionBasilar ArteryAortic Aneurysm, ThoracicEmbolization, TherapeuticSubclavian ArteryCarotid Artery, Internal, DissectionHeart AneurysmSubclavian Steal SyndromeTomography, X-Ray ComputedAngiography, Digital SubtractionAneurysm, FalseSubarachnoid HemorrhageAngiographyCarotid Artery, InternalBlood Vessel Prosthesis ImplantationLateral Medullary SyndromeCerebral ArteriesCoronary AneurysmIliac AneurysmStentsCarotid ArteriesMagnetic Resonance AngiographyTreatment OutcomeBlood Vessel ProsthesisAortographyPulmonary ArteryRenal ArteryEndovascular ProceduresAortic RuptureArterial Occlusive DiseasesCarotid Artery DiseasesVascular Surgical ProceduresNeck DissectionFemoral ArteryBrain Stem InfarctionsCervical VertebraeIliac ArteryNeck InjuriesFibromuscular DysplasiaCervical AtlasCarotid Artery, CommonFollow-Up StudiesAorta, AbdominalAxisAneurysm, RupturedSurgical InstrumentsRetrospective StudiesMesenteric ArteriesCerebral RevascularizationMammary ArteriesOccipital BoneSplenic ArteryCerebellar DiseasesPostoperative ComplicationsArteriovenous FistulaMesenteric Artery, SuperiorAngioplastyTime FactorsCoronary Artery BypassConstriction, PathologicBalloon OcclusionCeliac ArteryMagnetic Resonance ImagingAorta, ThoracicNeckCarotid Artery, ExternalAtlanto-Axial JointUltrasonography, Doppler, ColorRadial ArteryCerebral InfarctionAngioplasty, BalloonCerebrovascular CirculationIntracranial ArteriosclerosisDoppler EffectVertigoPercussionUltrasonography, DopplerUltrasonography, Doppler, DuplexHepatic ArteryNeurosurgical ProceduresCircle of WillisBrachiocephalic TrunkCerebellumMastoidAtlanto-Occipital JointMicrosurgeryIntracranial Embolism and ThrombosisUltrasonographyHeadacheRegional Blood Flow