Mitral Valve StenosisRheumatic Heart DiseaseCatheterizationMitral ValveBalloon ValvuloplastyBalloon OcclusionAortic Valve StenosisEchocardiographyMitral Valve InsufficiencyCarotid StenosisOverlearningHeart AtriaCardiac CatheterizationEchocardiography, DopplerCoronary StenosisTreatment OutcomeFollow-Up StudiesHeart Valve Prosthesis ImplantationSpinal StenosisPhonocardiographyCardiac Surgical ProceduresTracheal StenosisPregnancy Complications, CardiovascularEchocardiography, TransesophagealHeart Valve ProsthesisHeart AuscultationHemodynamicsKinetocardiographyRecurrenceReoperationLutembacher SyndromeCalcinosisPyloric StenosisConstriction, PathologicPulmonary Valve StenosisHeart SoundsChordae TendineaeEchocardiography, Doppler, ColorCor TriatriatumPostoperative ComplicationsProspective StudiesAtrial Function, LeftHeart Valve DiseasesDoppler EffectTime FactorsPulmonary Wedge PressureHeart MurmursAtrial FibrillationEchocardiography, Three-DimensionalHypertension, PulmonaryTricuspid Valve InsufficiencySeverity of Illness IndexBlood Flow VelocityEbstein AnomalyAortic Valve InsufficiencyThrombosisHeart DiseasesHeart NeoplasmsRenal Artery ObstructionAortic Stenosis, SubvalvularAtrial Function, RightPatient SelectionMitral Valve AnnuloplastyPhenindioneRisk FactorsMyxomaAortic Stenosis, SupravalvularAtrial AppendageEmbolismRheumatic FeverStentsCoronary AngiographyCarotid Artery, InternalRetrospective StudiesEndarterectomy, CarotidPredictive Value of TestsUltrasonography, Doppler, DuplexAngioplasty, BalloonSurvival AnalysisLaryngostenosisAortic ValveElectrocardiographyHeart VentriclesIntracranial Embolism and ThrombosisTricuspid Valve StenosisBlood PressureEndocarditisDiscrete Subaortic StenosisAnalysis of VariancePulmonary ArteryExercise TestDiastolePulmonary CirculationMagnetic Resonance AngiographyAngiographyDisease-Free SurvivalEchocardiography, StressStroke VolumeProportional Hazards ModelsArterial Occlusive Diseases