Aortic Valve StenosisAortic ValveHeart Valve Prosthesis ImplantationAortic Valve InsufficiencyPulmonary Valve StenosisHeart Valve ProsthesisHeart Valve DiseasesCalcinosisMitral ValveMitral Valve StenosisCardiac CatheterizationTricuspid Valve StenosisBioprosthesisCatheterizationEchocardiographyPulmonary ValveTreatment OutcomeEchocardiography, DopplerSeverity of Illness IndexProsthesis DesignBloodless Medical and Surgical ProceduresCarotid StenosisHypoplastic Left Heart SyndromeBalloon ValvuloplastyEchocardiography, TransesophagealAngiodysplasiaHemodynamicsTricuspid ValveFollow-Up StudiesEchocardiography, Doppler, ColorCoronary StenosisProspective StudiesBlood Flow VelocityVentricular Function, LeftTime FactorsVentricular Outflow ObstructionSpinal StenosisMitral Valve InsufficiencyRetrospective StudiesRisk FactorsHeart VentriclesTracheal StenosisAortaRisk AssessmentVentricular Dysfunction, LeftAortic Valve ProlapseStroke VolumePredictive Value of TestsHeart Defects, CongenitalIntervention StudiesObserver VariationPulmonary Subvalvular StenosisConstriction, PathologicDisease ProgressionEndocarditis, BacterialMitral Valve ProlapseInfant, NewbornPyloric StenosisRheumatic Heart DiseasePhonocardiographyDiscrete Subaortic StenosisDiastoleHypertrophy, Left VentricularBlood PressureReproducibility of ResultsEchocardiography, Three-DimensionalCardiac Valve AnnuloplastyVenous ValvesAortic CoarctationEndocarditisAortic AneurysmFeasibility StudiesNoonan SyndromeAortic Stenosis, SubvalvularPostoperative ComplicationsReoperationHeart Septal Defects, VentricularTomography, X-Ray ComputedStentsTricuspid Valve InsufficiencyThoracotomyCoronary AngiographyMitral Valve Annuloplasty