Carotid StenosisAngioplasty, BalloonEndarterectomy, CarotidCarotid ArteriesAngioplastyCarotid Artery DiseasesAngioplasty, Balloon, CoronaryCarotid Artery, InternalStentsConstriction, PathologicCarotid Artery, CommonUltrasonography, Doppler, DuplexAortic Valve StenosisEndarterectomyIschemic Attack, TransientCoronary StenosisTreatment OutcomeRecurrenceStrokeCerebrovascular DisordersFollow-Up StudiesCarotid Artery, ExternalCarotid BodyAngiographyArterial Occlusive DiseasesSpinal StenosisProspective StudiesUltrasonography, Doppler, TranscranialAngiography, Digital SubtractionAngioplasty, LaserCarotid SinusTracheal StenosisRisk FactorsMagnetic Resonance AngiographyCerebral AngiographyCoronary AngiographyAmaurosis FugaxCoronary DiseaseSeverity of Illness IndexCarotid Artery ThrombosisIntracranial EmbolismTime FactorsIntracranial ArteriosclerosisBlood Flow VelocityRetrospective StudiesTunica IntimaPulmonary Valve StenosisUltrasonographyPyloric StenosisMitral Valve StenosisUltrasonography, Doppler, ColorPostoperative ComplicationsVascular PatencyPredictive Value of TestsArteriosclerosisCarotid Artery InjuriesUltrasonography, DopplerMyocardial InfarctionBrain IschemiaEmbolismRenal Artery ObstructionRisk AssessmentAuscultationCoronary Artery BypassTomography, X-Ray ComputedCerebrovascular CirculationCoronary VesselsAsymptomatic DiseasesGraft Occlusion, VascularSensitivity and SpecificityIliac ArteryTunica MediaCatheterizationFemoral ArteryPatient SelectionLife TablesCerebral InfarctionCarotid Intima-Media ThicknessHemodynamicsObserver VariationVertebrobasilar InsufficiencyCollateral CirculationMiddle Cerebral ArteryAtherectomy, CoronaryRetinal Artery OcclusionDoppler EffectCoronary Artery DiseaseReoperationBlood Vessel ProsthesisCalcinosisPeripheral Vascular DiseasesPlatelet Aggregation InhibitorsCranial Nerve InjuriesAngina PectorisCoronary CirculationAtherosclerosisPlaque, AtheroscleroticIntracranial Embolism and ThrombosisBlood PressureReproducibility of Results