Aortic Valve StenosisAortic ValveHeart Valve Prosthesis ImplantationAortic Valve InsufficiencyPulmonary Valve StenosisHeart Valve ProsthesisHeart Valve DiseasesCalcinosisMitral ValveMitral Valve StenosisCardiac CatheterizationTricuspid Valve StenosisBioprosthesisCatheterizationEchocardiographyPulmonary ValveHeartEchocardiography, DopplerSeverity of Illness IndexTreatment OutcomeProsthesis DesignBloodless Medical and Surgical ProceduresHypoplastic Left Heart SyndromeCarotid StenosisHemodynamicsEchocardiography, TransesophagealBalloon ValvuloplastyAngiodysplasiaTricuspid ValveEchocardiography, Doppler, ColorVentricular Function, LeftFollow-Up StudiesCoronary StenosisHeart Defects, CongenitalBlood Flow VelocityProspective StudiesVentricular Outflow ObstructionHeart RateSpinal StenosisTime FactorsMitral Valve InsufficiencyHeart VentriclesTracheal StenosisVentricular Dysfunction, LeftRetrospective StudiesAortaStroke VolumeRisk FactorsAortic Valve ProlapsePredictive Value of TestsRheumatic Heart DiseaseRisk AssessmentObserver VariationPulmonary Subvalvular StenosisEndocarditis, BacterialMitral Valve ProlapseConstriction, PathologicDisease ProgressionPyloric StenosisHeart FailurePhonocardiographyDiastoleHypertrophy, Left VentricularInfant, NewbornDiscrete Subaortic StenosisEchocardiography, Three-DimensionalReproducibility of ResultsAortic CoarctationVenous ValvesCardiac Valve AnnuloplastyEndocarditisBlood PressureHeart DiseasesNoonan SyndromeAortic AneurysmHeart Septal Defects, VentricularAortic Stenosis, SubvalvularHeart ValvesPostoperative ComplicationsTricuspid Valve InsufficiencyReoperationTomography, X-Ray ComputedThoracotomyFeasibility StudiesCardiac Surgical ProceduresMitral Valve Annuloplasty