Aortic Valve StenosisAortic ValveHeart Valve Prosthesis ImplantationAortic Valve InsufficiencyPulmonary Valve StenosisHeart Valve ProsthesisHeart Valve DiseasesCalcinosisMitral ValveMitral Valve StenosisCardiac CatheterizationTricuspid Valve StenosisBioprosthesisCatheterizationEchocardiographyHeartPulmonary ValveEchocardiography, DopplerTreatment OutcomeSeverity of Illness IndexHeart Defects, CongenitalHeart DiseasesProsthesis DesignHypoplastic Left Heart SyndromeBloodless Medical and Surgical ProceduresCarotid StenosisHemodynamicsEchocardiography, TransesophagealBalloon ValvuloplastyTricuspid ValveAngiodysplasiaRheumatic Heart DiseaseFollow-Up StudiesProspective StudiesRisk FactorsEchocardiography, Doppler, ColorVentricular Function, LeftCoronary StenosisBlood Flow VelocityTime FactorsCoronary DiseaseHeart RateVentricular Outflow ObstructionMitral Valve InsufficiencySpinal StenosisRetrospective StudiesHeart VentriclesVentricular Dysfunction, LeftStroke VolumeRisk AssessmentAortaTracheal StenosisPredictive Value of TestsAortic Valve ProlapseHeart FailureObserver VariationEndocarditis, BacterialInfant, NewbornPulmonary Subvalvular StenosisMitral Valve ProlapseDisease ProgressionConstriction, PathologicDiastolePhonocardiographyHypertrophy, Left VentricularPyloric StenosisBlood PressureDiscrete Subaortic StenosisMyocardial IschemiaReproducibility of ResultsEchocardiography, Three-DimensionalEndocarditisAortic CoarctationHeart Septal Defects, VentricularHeart ValvesVenous ValvesCardiac Valve AnnuloplastyNoonan SyndromeAortic AneurysmTricuspid Valve InsufficiencyAortic Stenosis, SubvalvularPostoperative ComplicationsCardiac Surgical ProceduresTomography, X-Ray ComputedReoperationThoracotomyFeasibility StudiesFetal HeartHeart TransplantationCoronary AngiographyMitral Valve Annuloplasty