Takayasu ArteritisArteritisGiant Cell ArteritisArteritis Virus, EquineTemporal ArteriesPolymyalgia RheumaticaArterivirus InfectionsPolyarteritis NodosaHLA-B52 AntigenAortic Arch SyndromesHorse DiseasesBlood SedimentationBiopsyDelayed DiagnosisPrednisoloneAortitisSensitivity and SpecificityArterivirusPrenatal DiagnosisEarly DiagnosisSubclavian ArteryHorsesRetrospective StudiesTomography, X-Ray ComputedDiagnosisSubclavian Steal SyndromeAxillary ArteryAngiographyOptic Neuropathy, IschemicMucocutaneous Lymph Node SyndromeFollow-Up StudiesAdrenal Cortex HormonesFatal OutcomeProspective StudiesVasculitisMagnetic Resonance AngiographyTreatment OutcomeVasculitis, Central Nervous SystemBrachiocephalic TrunkDiagnostic ErrorsStrongyle Infections, EquineAnti-Inflammatory AgentsPredictive Value of TestsGlucocorticoidsTime FactorsAortographyUltrasonography, Doppler, ColorAneurysmPrednisoneMagnetic Resonance ImagingInfarctionRisk FactorsMethylprednisoloneLactobacillus caseiAortic AneurysmArachnoiditisPrognosisBlindnessNursing DiagnosisDiagnosis, Computer-AssistedPolymerase Chain ReactionRetinal Artery OcclusionAIDS Arteritis, Central Nervous SystemRenal ArteryAorta, AbdominalPregnancyReproducibility of ResultsArterial Occlusive DiseasesIncidenceAdie SyndromePreimplantation DiagnosisTogaviridaeCase-Control StudiesFever of Unknown OriginVertebral ArteryVasa VasorumBiological MarkersSyndromeAmaurosis FugaxAortic Valve InsufficiencyAcute DiseaseSeverity of Illness IndexScalpAge FactorsAge of OnsetRecurrenceInfant, NewbornCohort StudiesDiagnostic ImagingAorta, ThoracicEnzyme-Linked Immunosorbent AssayVision DisordersAortaHeadacheUltrasonography, Doppler, DuplexArteriesVaccines, MarkerPrevalenceBiopsy, NeedleNecrosis