Aortic Valve StenosisHeart Valve Prosthesis ImplantationAortic ValveHeart Valve ProsthesisCardiac CatheterizationAortic Stenosis, SupravalvularTreatment OutcomeSeverity of Illness IndexCarotid StenosisAortic Stenosis, SubvalvularRisk FactorsCoronary StenosisRisk AssessmentSpinal StenosisPostoperative ComplicationsBioprosthesisFollow-Up StudiesPulmonary Valve StenosisTracheal StenosisMitral Valve StenosisRetrospective StudiesProspective StudiesEchocardiographyStentsEchocardiography, DopplerAortic Valve InsufficiencyCalcinosisCatheterizationConstriction, PathologicPyloric StenosisEndarterectomy, CarotidProsthesis DesignPredictive Value of TestsPatient SelectionTime FactorsHeart Valve DiseasesHemodynamicsPrognosisStroke VolumeTomography, X-Ray ComputedPreoperative CareCardiac Surgical ProceduresWilliams SyndromeHypertrophy, Left VentricularCoronary AngiographyCoronary Artery BypassVentricular Function, LeftCholecystostomyDiscrete Subaortic StenosisBlood Flow VelocityFeasibility StudiesStrokeMitral Valve InsufficiencyAngioplastyRiskChi-Square DistributionKaplan-Meier EstimateElectrocardiographyTricuspid Valve StenosisAngiodysplasiaSurvival AnalysisBlood Vessel Prosthesis ImplantationCoronary DiseaseMitral Valve AnnuloplastyEndarterectomyBalloon ValvuloplastyPreoperative PeriodPhonocardiographyRenal Artery ObstructionSurgical Procedures, OperativeHospital MortalityAge FactorsVentricular Dysfunction, LeftSurvival RateHeart MurmursRecurrenceReoperationHeart VentriclesLength of StaySensitivity and SpecificityExercise TestEndocardial FibroelastosisAngiography