Carotid Artery, ExternalCarotid ArteriesCarotid Artery, InternalCarotid Artery DiseasesCarotid StenosisCarotid Artery, CommonEndarterectomy, CarotidCarotid Artery ThrombosisArteriesMaxillary ArteryVertebral ArteryCerebral AngiographyUltrasonography, Doppler, DuplexCerebral RevascularizationCarotid Artery, Internal, DissectionCerebral ArteriesCarotid BodyAngiographyStentsAngiography, Digital SubtractionArterial Occlusive DiseasesEndarterectomyEmbolization, TherapeuticCerebrovascular CirculationTunica IntimaCarotid SinusAmaurosis FugaxCavernous SinusCarotid Body TumorIschemic Attack, TransientOphthalmic ArteryMagnetic Resonance AngiographyCollateral CirculationTemporal ArteriesAngioplasty, BalloonTunica MediaArteriosclerosisPulmonary ArteryBlood Flow VelocityNeckDissectionTomography, X-Ray ComputedFemoral ArteryMiddle Cerebral ArteryCarotid Intima-Media ThicknessCerebrovascular DisordersLigationCarotid Artery InjuriesSubclavian ArteryBrain IschemiaMetergolineRegional Blood FlowBasilar ArteryUltrasonography, Doppler, ColorRenal ArteryCentral Nervous System Vascular MalformationsMesenteric ArteriesMoyamoya DiseaseInjections, Intra-ArterialArteriovenous FistulaTreatment OutcomePterygopalatine FossaAngioplastyCadaverCoronary Artery BypassRadial ArteryIntracranial Embolism and ThrombosisIliac ArteryStrokePostoperative ComplicationsBlood PressureBrachial ArteryUltrasonography, Doppler, TranscranialTime FactorsMeningiomaMuscle, Smooth, VascularCatheterizationRisk FactorsMeningeal ArteriesMammary ArteriesAneurysmUltrasonographyProspective StudiesMagnetic Resonance ImagingIntracranial EmbolismBrainHemodynamicsDisease Models, Animal5-MethoxytryptamineAtherosclerosisIntracranial ArteriosclerosisFollow-Up StudiesConstrictionIntracranial AneurysmEpistaxisCircle of WillisCerebral InfarctionCoronary VesselsEndothelium, VascularDogs