Carotid Artery, InternalRadial ArteryCarotid ArteriesCarotid Artery DiseasesCarotid StenosisCarotid Artery, CommonCarotid Artery, ExternalCarotid Artery ThrombosisEndarterectomy, CarotidCarotid Artery, Internal, DissectionCerebral AngiographyArteriesArterial Occlusive DiseasesAngiography, Digital SubtractionCerebral ArteriesMagnetic Resonance AngiographyUltrasonography, Doppler, DuplexVertebral ArteryIschemic Attack, TransientCerebrovascular CirculationIntracranial AneurysmTunica IntimaEndarterectomyCircle of WillisStentsAngiographyCerebral RevascularizationCarotid BodyCarotid Artery InjuriesCavernous SinusTomography, X-Ray ComputedCerebrovascular DisordersAneurysmTunica MediaCarotid SinusIntracranial Embolism and ThrombosisBlood Flow VelocityBasilar ArteryBrain IschemiaMiddle Cerebral ArteryAngioplasty, BalloonOphthalmic ArteryUltrasonography, Doppler, TranscranialCerebral InfarctionStrokeCollateral CirculationIntracranial EmbolismCarotid Intima-Media ThicknessPulmonary ArteryArteriosclerosisEmbolization, TherapeuticAngioplastyUltrasonography, Doppler, ColorUltrasonographyTreatment OutcomeFemoral ArteryIntracranial ArteriosclerosisFibromuscular DysplasiaAmaurosis FugaxCatheterizationCarotid-Cavernous Sinus FistulaTemporal ArteriesSubclavian ArteryEpistaxisBalloon OcclusionMoyamoya DiseaseRenal ArteryTime FactorsPetrous BoneRisk FactorsAneurysm, RupturedProspective StudiesMesenteric ArteriesRegional Blood FlowHorner SyndromeFollow-Up StudiesConstriction, PathologicCranial Nerve DiseasesAneurysm, FalseMagnetic Resonance ImagingInjections, Intra-ArterialUltrasonography, DopplerRetrospective StudiesCerebral Arterial DiseasesAnterior Cerebral ArteryPostoperative ComplicationsBlood PressureRetinal Artery OcclusionCoronary Artery BypassMammary ArteriesSphenoid BoneIliac ArteryPredictive Value of TestsSubarachnoid HemorrhageAcetazolamideLigationInfarction, Middle Cerebral ArteryBrainHemodynamicsSensitivity and Specificity