Ultrasonography, Doppler, DuplexCarotid StenosisUltrasonography, Doppler, TranscranialUltrasonography, Doppler, ColorUltrasonographyCarotid ArteriesCarotid Artery, InternalTranscranial Magnetic StimulationEndarterectomy, CarotidUltrasonography, DopplerCarotid Artery DiseasesCarotid Artery, ExternalBlood Flow VelocityCarotid Artery, CommonUltrasonography, Doppler, PulsedVenous InsufficiencyProspective StudiesVaricose VeinsUltrasonography, PrenatalSensitivity and SpecificityPredictive Value of TestsEvoked Potentials, MotorLegAngiography, Digital SubtractionDoppler EffectArterial Occlusive DiseasesVaricose UlcerPopliteal VeinFemoral VeinCarotid BodyRetrospective StudiesStrokeCircle of WillisFollow-Up StudiesAngiographySeverity of Illness IndexMagnetic Resonance AngiographyTime FactorsEchoencephalographyCarotid SinusCerebrovascular CirculationRisk FactorsIschemic Attack, TransientReproducibility of ResultsVeinsTomography, X-Ray ComputedVertebral ArteryMotor CortexSaphenous VeinTreatment OutcomeRegional Blood FlowEndosonographyConstriction, PathologicEchocardiography, Doppler, PulsedMiddle Cerebral ArteryCerebral ArteriesVascular PatencyPreoperative CareVenous ThrombosisUltrasonography, InterventionalIntermittent Pneumatic Compression DevicesCarotid Artery ThrombosisEchocardiography, Doppler, ColorRenal Artery ObstructionPeripheral Vascular DiseasesAngioplasty, BalloonUltrasonography, MammaryPhlebographyIntracranial EmbolismContrast MediaMesenteric Vascular OcclusionThrombophlebitisPulsatile FlowGraft Occlusion, VascularPlethysmographyFemoral ArteryLower ExtremityCarotid Intima-Media ThicknessArteriosclerosisIliac ArteryTunica MediaTunica IntimaCerebral AngiographyPopliteal ArteryMagnetic Resonance ImagingPregnancyRecurrenceROC CurveCarotid Artery InjuriesCerebrovascular DisordersStentsIntracranial Embolism and ThrombosisVascular Surgical ProceduresPostoperative ComplicationsSulfur HexafluorideMonitoring, IntraoperativeImaging, Three-DimensionalEndarterectomyLaser-Doppler FlowmetryObserver Variation