Aortic Valve StenosisAortic ValvePulmonary Valve StenosisHeart Valve Prosthesis ImplantationAortic Valve InsufficiencyHeart Valve ProsthesisHeart Valve DiseasesMitral Valve StenosisCalcinosisMitral ValveTricuspid Valve StenosisCardiac CatheterizationBioprosthesisCarotid StenosisCatheterizationEchocardiographyCoronary StenosisPulmonary ValveSpinal StenosisEchocardiography, DopplerSeverity of Illness IndexTreatment OutcomeTracheal StenosisProsthesis DesignBloodless Medical and Surgical ProceduresHypoplastic Left Heart SyndromeEchocardiography, TransesophagealHemodynamicsBalloon ValvuloplastyPyloric StenosisAngiodysplasiaConstriction, PathologicTricuspid ValveBlood Flow VelocityFollow-Up StudiesEchocardiography, Doppler, ColorProspective StudiesVentricular Function, LeftVentricular Outflow ObstructionTime FactorsRetrospective StudiesMitral Valve InsufficiencyHeart VentriclesRisk FactorsPredictive Value of TestsAortaDiscrete Subaortic StenosisObserver VariationVentricular Dysfunction, LeftPulmonary Subvalvular StenosisStroke VolumeAortic Stenosis, SubvalvularHeart Defects, CongenitalAortic Valve ProlapseRisk AssessmentRheumatic Heart DiseaseDisease ProgressionEndocarditis, BacterialPhonocardiographyMitral Valve ProlapseRenal Artery ObstructionInfant, NewbornAortic Stenosis, SupravalvularDiastoleHypertrophy, Left VentricularStentsCoronary AngiographyBlood PressureReproducibility of ResultsAortic CoarctationTomography, X-Ray ComputedEchocardiography, Three-DimensionalCardiac Valve AnnuloplastyPostoperative ComplicationsVenous ValvesEndocarditisAngioplasty, BalloonAortic AneurysmCarotid Artery, InternalNoonan SyndromeUltrasonography, Doppler, DuplexEndarterectomy, CarotidReoperationHeart Septal Defects, VentricularLaryngostenosisAngiographyTricuspid Valve InsufficiencyFeasibility StudiesMagnetic Resonance AngiographyThoracotomyMultidetector Computed TomographyArterial Occlusive DiseasesMitral Valve AnnuloplastyPyloric Stenosis, Hypertrophic