Carotid Artery, InternalRadial ArteryCarotid ArteriesCarotid Artery DiseasesCarotid StenosisCarotid Artery, ExternalCarotid Artery, CommonCarotid Artery, Internal, DissectionCarotid Artery ThrombosisEndarterectomy, CarotidCerebral AngiographyArteriesCerebral ArteriesArterial Occlusive DiseasesAngiography, Digital SubtractionVertebral ArteryMagnetic Resonance AngiographyIntracranial AneurysmCerebrovascular CirculationUltrasonography, Doppler, DuplexCircle of WillisIschemic Attack, TransientCerebral RevascularizationCavernous SinusEndarterectomyAngiographyTomography, X-Ray ComputedAneurysmBasilar ArteryCerebrovascular DisordersStentsCarotid Artery InjuriesIntracranial Embolism and ThrombosisPulmonary ArteryOphthalmic ArteryMiddle Cerebral ArteryBlood Flow VelocityUltrasonography, Doppler, TranscranialCerebral InfarctionBrain IschemiaCollateral CirculationTunica IntimaEmbolization, TherapeuticFemoral ArteryStrokeAngioplasty, BalloonUltrasonography, Doppler, ColorFibromuscular DysplasiaIntracranial EmbolismRenal ArteryTemporal ArteriesCarotid-Cavernous Sinus FistulaTreatment OutcomeTunica MediaUltrasonographyMesenteric ArteriesEpistaxisMoyamoya DiseaseSubclavian ArteryPetrous BoneIntracranial ArteriosclerosisArteriosclerosisAngioplastyBalloon OcclusionAneurysm, RupturedCarotid BodyAmaurosis FugaxCatheterizationHorner SyndromeCranial Nerve DiseasesRegional Blood FlowCarotid SinusConstriction, PathologicTime FactorsAneurysm, FalseCerebral Arterial DiseasesCoronary Artery BypassAnterior Cerebral ArteryIliac ArteryFollow-Up StudiesProspective StudiesCarotid Intima-Media ThicknessInjections, Intra-ArterialMammary ArteriesMagnetic Resonance ImagingRisk FactorsUltrasonography, DopplerSubarachnoid HemorrhageInfarction, Middle Cerebral ArterySphenoid BoneRetrospective StudiesRetinal Artery OcclusionAcetazolamidePostoperative ComplicationsBrachial ArteryHemodynamicsBrainPredictive Value of TestsSensitivity and SpecificityBlood Pressure