Vertebral Artery DissectionVertebral ArteryVertebrobasilar InsufficiencyArteriesBasilar ArterySubclavian ArteryCerebral AngiographySubclavian Steal SyndromeLateral Medullary SyndromeCarotid ArteriesMagnetic Resonance AngiographyAneurysm, DissectingCerebral ArteriesPulmonary ArteryCarotid Artery, InternalAngiographyIntracranial AneurysmCervical VertebraeEmbolization, TherapeuticAngiography, Digital SubtractionBrain Stem InfarctionsCervical AtlasArterial Occlusive DiseasesNeck InjuriesSubarachnoid HemorrhageCarotid Artery, Internal, DissectionAxisRenal ArteryFemoral ArteryTomography, X-Ray ComputedMesenteric ArteriesFibromuscular DysplasiaAneurysm, RupturedOccipital BoneCarotid Artery, CommonMammary ArteriesCarotid Artery DiseasesCerebellar DiseasesStents