Carotid Artery DiseasesCarotid ArteriesCarotid StenosisCarotid Artery, InternalEndarterectomy, CarotidCarotid Artery, CommonCoronary Artery DiseaseCarotid Artery, ExternalBlood VesselsCarotid Artery ThrombosisArteriesEndarterectomyUltrasonography, Doppler, DuplexArterial Occlusive DiseasesIschemic Attack, TransientStentsMagnetic Resonance AngiographyCerebral ArteriesRisk FactorsCoronary DiseaseCerebrovascular DisordersAmaurosis FugaxCerebrovascular CirculationCircle of WillisUltrasonographyUltrasonography, Doppler, TranscranialStrokeAngioplastyCarotid Artery, Internal, DissectionAngiographyCerebral AngiographyCarotid BodyCoronary Artery BypassArteriosclerosisTunica IntimaProspective StudiesBlood Flow VelocityAngioplasty, BalloonTreatment OutcomeAngiography, Digital SubtractionCoronary AngiographyTomography, X-Ray ComputedCarotid SinusIntracranial ArteriosclerosisTime FactorsCoronary VesselsRetinal Artery OcclusionOphthalmic ArteryAcetazolamideIntracranial EmbolismFemoral ArteryTunica MediaPulmonary ArteryFollow-Up StudiesPredictive Value of TestsBrain IschemiaConstriction, PathologicAsymptomatic DiseasesSeverity of Illness IndexIntracranial Embolism and ThrombosisRetrospective StudiesEmbolismCerebral InfarctionVertebral ArteryCarotid Intima-Media ThicknessEndothelium, VascularRisk AssessmentBlood PressureUltrasonography, Doppler, ColorCarotid Artery InjuriesBasilar ArteryMesenteric ArteriesRenal ArterySensitivity and SpecificityCollateral CirculationUltrasonography, DopplerPostoperative ComplicationsMuscle, Smooth, VascularSubclavian ArteryBrachial ArteryIliac ArteryVasodilationRadial ArteryRegional Blood FlowMammary ArteriesAtherosclerosisMagnetic Resonance ImagingReproducibility of ResultsCatheterizationPatient SelectionRetinal VesselsCoronary StenosisMyocardial InfarctionLymphatic VesselsHemodynamicsBrainCalcinosisVasodilator AgentsMiddle Cerebral ArteryAngina Pectoris