Vertebral ArteryCarotid Artery, Internal, DissectionVertebral Artery DissectionAneurysm, DissectingCarotid Artery, InternalCarotid Artery DiseasesCranial Nerve DiseasesCerebral AngiographyDissectionVertebrobasilar InsufficiencyCarotid ArteriesMagnetic Resonance AngiographyCarotid StenosisArteriesCarotid Artery, CommonSubclavian ArteryBasilar ArteryNeck DissectionEndarterectomy, CarotidSubclavian Steal SyndromeAortic AneurysmCarotid Artery, ExternalLateral Medullary SyndromeAngiographyCarotid BodyTomography, X-Ray ComputedIntracranial AneurysmStentsCarotid SinusCerebral ArteriesAngiography, Digital SubtractionArterial Occlusive DiseasesEmbolization, TherapeuticPulmonary ArteryCarotid Artery InjuriesTreatment OutcomeBrain Stem InfarctionsNeck InjuriesFibromuscular DysplasiaAortic Aneurysm, ThoracicCervical VertebraeFemoral ArterySubarachnoid HemorrhageCarotid Artery ThrombosisRenal ArteryCervical AtlasAneurysm, RupturedAxisLymph Node ExcisionFollow-Up StudiesAneurysm, FalseMesenteric ArteriesBlood Vessel Prosthesis ImplantationAortographyAngioplasty, BalloonNeckUltrasonography, Doppler, DuplexMammary ArteriesConstriction, PathologicRetrospective StudiesOccipital BoneIntracranial ArteriosclerosisIliac ArteryAngioplastyCerebral InfarctionCerebrovascular CirculationCerebral RevascularizationUltrasonography, Doppler, ColorCerebellar DiseasesCerebrovascular DisordersAneurysmAorta, ThoracicBlood Vessel ProsthesisCoronary Artery BypassUltrasonographyMagnetic Resonance ImagingTime FactorsDoppler EffectUltrasonography, DopplerBrain IschemiaStrokeEndovascular ProceduresCarotid Intima-Media ThicknessRadial ArteryArteriovenous FistulaUltrasonography, Doppler, TranscranialCadaverIschemic Attack, TransientAtlanto-Axial JointPostoperative ComplicationsVertigoMesenteric Artery, SuperiorTunica MediaRegional Blood FlowRisk FactorsVascular Surgical ProceduresRupture, SpontaneousIntracranial Embolism and ThrombosisPercussionBlood Flow Velocity