Carotid Artery, Internal, DissectionVertebral ArteryVertebral Artery DissectionCarotid Artery, InternalAneurysm, DissectingCarotid Artery DiseasesCarotid ArteriesCerebral ArteriesHorner SyndromeCerebral AngiographyCranial Nerve DiseasesArteriesNeck InjuriesMagnetic Resonance AngiographyFibromuscular DysplasiaCarotid Artery, CommonVertebrobasilar InsufficiencyMiddle Cerebral ArteryCerebral InfarctionIntracranial AneurysmBasilar ArteryTomography, X-Ray ComputedStentsInfarction, Middle Cerebral ArteryCarotid Artery, ExternalCarotid Artery InjuriesCoronary AneurysmAngioplastyPulmonary ArterySubclavian ArteryDissectionAngiographyCerebrovascular CirculationEndarterectomy, CarotidRenal ArteryLateral Medullary SyndromeParalysisBrain IschemiaMagnetic Resonance ImagingFemoral ArteryArterial Occlusive DiseasesAngiography, Digital SubtractionMesenteric ArteriesSubarachnoid HemorrhageTreatment OutcomePosterior Cerebral ArteryCoronary Artery BypassIschemic Attack, TransientEmbolization, TherapeuticMesenteric Artery, SuperiorAnterior Cerebral ArteryStrokeUltrasonography, Doppler, TranscranialSubclavian Steal SyndromeIliac ArteryIntracranial Embolism and ThrombosisCerebrovascular DisordersAneurysm, RupturedMammary ArteriesRadial ArteryRupture, SpontaneousAngioplasty, BalloonTime FactorsUltrasonography, Doppler, DuplexCerebral Arterial DiseasesCeliac ArteryBrain Stem InfarctionsCoronary VesselsCerebral RevascularizationBlood Flow VelocityFollow-Up StudiesBrainNeckHeadacheBrachial ArteryCoronary AngiographyTemporal ArteriesRetrospective StudiesCarotid BodyCircle of WillisAneurysm, FalseRegional Blood FlowOphthalmic ArteryIntracranial ArteriosclerosisMuscle, Smooth, VascularSplenic ArteryAneurysmConstriction, PathologicInfarction, Anterior Cerebral ArteryUltrasonography, DopplerCarotid SinusRisk FactorsTunica IntimaBlood PressureUltrasonography, Doppler, ColorProspective StudiesPuerperal DisordersHepatic ArteryVasoconstrictionAortic Aneurysm