Vertebral ArteryVertebral Artery DissectionVertebrobasilar InsufficiencyAneurysm, DissectingCerebral AngiographyLateral Medullary SyndromeCarotid Artery, Internal, DissectionMagnetic Resonance AngiographyIntracranial AneurysmHeadacheChiropracticNeck PainArteriesSubarachnoid HemorrhageBasilar ArteryTomography, X-Ray ComputedCarotid Artery, InternalSubclavian ArteryCerebral InfarctionMagnetic Resonance ImagingCoronary AneurysmAngiographySubclavian Steal SyndromeCarotid Artery DiseasesCarotid ArteriesDissectionFibromuscular DysplasiaAngiography, Digital SubtractionNeck InjuriesCerebral ArteriesBrain Stem InfarctionsEmbolization, TherapeuticPulmonary ArteryStentsAnticoagulantsFollow-Up StudiesRenal ArteryCarotid Artery, ExternalArterial Occlusive DiseasesNeckIntracranial ArteriosclerosisAneurysm, RupturedCervical VertebraeTreatment OutcomeHorner SyndromeCarotid Artery, CommonCervical AtlasAneurysm, FalseAneurysmRupture, SpontaneousFemoral ArteryAxisMesenteric Artery, SuperiorMesenteric ArteriesCarotid StenosisInfarctionUltrasonography, Doppler, TranscranialOccipital BoneCerebrovascular DisordersHypoglossal Nerve DiseasesPuerperal DisordersConstriction, PathologicCerebral RevascularizationCoronary Artery BypassUltrasonography, Doppler, DuplexDoppler EffectMammary ArteriesCranial Nerve DiseasesBrain IschemiaCerebrovascular CirculationAngioplasty, Balloon