Carotid Artery, Internal, DissectionVertebral Artery DissectionCarotid Artery, InternalVertebral ArteryAneurysm, DissectingCerebral AngiographyHorner SyndromeCarotid Artery DiseasesCranial Nerve DiseasesLateral Medullary SyndromeMagnetic Resonance AngiographyCarotid ArteriesVertebrobasilar InsufficiencyTomography, X-Ray ComputedIntracranial AneurysmCarotid StenosisNeck InjuriesFibromuscular DysplasiaCoronary AneurysmCerebral InfarctionCarotid Artery, CommonCarotid Artery, ExternalHeadacheDissectionStentsCarotid Artery ThrombosisSubarachnoid HemorrhageMagnetic Resonance ImagingArteriesNeck PainChiropracticEndarterectomy, CarotidAngiographyAngiography, Digital SubtractionBasilar ArteryCarotid Artery InjuriesAngioplastyArterial Occlusive DiseasesCerebral ArteriesUltrasonography, Doppler, DuplexParalysisTreatment OutcomeEmbolization, TherapeuticFollow-Up StudiesCerebrovascular CirculationSubclavian ArteryCerebral RevascularizationIntracranial Embolism and ThrombosisCerebrovascular DisordersRupture, SpontaneousCircle of WillisIschemic Attack, TransientBrain IschemiaAneurysmRenal ArteryNeckStrokeAnticoagulantsAneurysm, RupturedUltrasonography, Doppler, TranscranialAngioplasty, BalloonMesenteric Artery, SuperiorPulmonary ArteryCavernous SinusEndarterectomyAneurysm, FalseRetrospective StudiesBlood Flow VelocityBrain Stem InfarctionsPuerperal DisordersAortic AneurysmMiddle Cerebral ArteryUltrasonography, Doppler, ColorTime FactorsOphthalmic ArteryNeck DissectionHematomaUltrasonographyIntracranial ArteriosclerosisCollateral CirculationHypoglossal Nerve DiseasesProspective StudiesTunica IntimaVascular Surgical ProceduresFemoral ArteryCeliac ArteryWounds, NonpenetratingRisk FactorsCoronary AngiographySubclavian Steal SyndromeBalloon OcclusionIntracranial EmbolismConstriction, PathologicCoronary Artery BypassBlood Vessel Prosthesis ImplantationEndovascular ProceduresInfarctionTunica MediaTemporal ArteriesPostoperative Complications