Mitral Valve StenosisMitral ValveAortic Valve StenosisHeart ValvesAortic ValveHeart Valve DiseasesRheumatic Heart DiseasePulmonary Valve StenosisHeart Valve ProsthesisMitral Valve InsufficiencyMitral Valve ProlapseCatheterizationHeart Valve Prosthesis ImplantationBioprosthesisPulmonary ValveAortic Valve InsufficiencyMitral Valve AnnuloplastyTricuspid Valve StenosisTricuspid ValveHeartEchocardiographyChordae TendineaeCalcinosisCardiac CatheterizationBalloon ValvuloplastyEchocardiography, TransesophagealCarotid StenosisEchocardiography, DopplerTreatment OutcomeProsthesis DesignEndocarditis, BacterialEndocarditisPhonocardiographyHeart Defects, CongenitalEchocardiography, Doppler, ColorEchocardiography, Three-DimensionalVenous ValvesTricuspid Valve InsufficiencyCoronary StenosisHeart RateCardiac Surgical ProceduresHemodynamicsFollow-Up StudiesSpinal StenosisCardiac Valve AnnuloplastySeverity of Illness IndexTracheal StenosisTime FactorsPulmonary Subvalvular StenosisHeart FailureProspective StudiesReoperationRetrospective StudiesHeart DiseasesVentricular Function, LeftVentricular Outflow ObstructionHeart VentriclesHeart AtriaPostoperative ComplicationsPyloric StenosisConstriction, PathologicBlood Flow VelocityHeart AuscultationThromboembolismProsthesis FailureModels, CardiovascularDiscrete Subaortic StenosisRisk FactorsHeart Septal Defects, VentricularThoracotomyPredictive Value of TestsStroke VolumeHypoplastic Left Heart SyndromeHeart SoundsHeart NeoplasmsVentricular Dysfunction, LeftNoonan SyndromeAortic CoarctationFeasibility StudiesRisk AssessmentProlapseDiastoleMyxomaSuture TechniquesPapillary MusclesAnticoagulantsHeart Septal Defects, AtrialAortic Stenosis, SubvalvularTissue EngineeringBloodless Medical and Surgical ProceduresTomography, X-Ray ComputedObserver VariationHeart RuptureFetal HeartAngiodysplasiaReproducibility of ResultsPericardiumInfant, Newborn