Carotid StenosisAortic Valve StenosisCoronary StenosisSpinal StenosisTracheal StenosisPyloric StenosisMitral Valve StenosisConstriction, PathologicPulmonary Valve StenosisRenal Artery ObstructionAortic Stenosis, SubvalvularAortic Stenosis, SupravalvularStentsCoronary AngiographyCarotid Artery, InternalEndarterectomy, CarotidUltrasonography, Doppler, DuplexAngioplasty, BalloonLaryngostenosisAortic ValveTricuspid Valve StenosisDiscrete Subaortic StenosisTreatment OutcomeMagnetic Resonance AngiographyAngiographyArterial Occlusive DiseasesPyloric Stenosis, HypertrophicSeverity of Illness IndexBlood Flow VelocityFollow-Up StudiesHeart Valve Prosthesis ImplantationAngiography, Digital SubtractionCatheterizationEsophageal StenosisIntracranial ArteriosclerosisAngioplastyGraft Occlusion, VascularCardiac CatheterizationCoronary DiseaseProspective StudiesTomography, X-Ray ComputedCoronary CirculationRetrospective StudiesCoronary VesselsPredictive Value of TestsHemodynamicsVertebrobasilar InsufficiencySensitivity and SpecificityEchocardiographyFractional Flow Reserve, MyocardialCarotid Artery DiseasesCerebral AngiographyCalcinosisCarotid ArteriesVascular PatencyRecurrenceHeart Valve ProsthesisPostoperative ComplicationsRisk FactorsHypertension, RenovascularUltrasonography, Doppler, ColorIschemic Attack, TransientArteriovenous Shunt, SurgicalRenal ArteryTime FactorsCoronary Artery DiseaseCerebrovascular DisordersIntracranial Arterial DiseasesEndarterectomyEchocardiography, DopplerRheumatic Heart DiseaseStrokeLumbar VertebraePulmonary Veno-Occlusive DiseaseCarotid Artery, ExternalDecompression, SurgicalUltrasonography, Doppler, TranscranialObserver VariationIliac ArteryUltrasonography, DopplerAortic Valve InsufficiencyAngioplasty, Balloon, CoronaryPulmonary Subvalvular StenosisSpinal CanalUltrasonography, InterventionalReproducibility of ResultsMitral ValveBronchial DiseasesUltrasonographyCollateral CirculationLaminectomyAmaurosis FugaxCerebral AqueductReoperationRisk AssessmentDilatationContrast MediaAngina PectorisBlood Vessel ProsthesisBlood Pressure