Mitral Valve StenosisRheumatic Heart DiseaseMitral ValveAortic Valve StenosisCatheterizationCarotid StenosisEchocardiographyCoronary StenosisBalloon ValvuloplastySpinal StenosisPhonocardiographyTracheal StenosisHeart AuscultationKinetocardiographyHeart AtriaLutembacher SyndromeMitral Valve InsufficiencyPyloric StenosisCardiac CatheterizationConstriction, PathologicPulmonary Valve StenosisEchocardiography, DopplerHeart SoundsHeart Valve Prosthesis ImplantationChordae TendineaeEchocardiography, Doppler, ColorHemodynamicsCor TriatriatumTreatment OutcomeFollow-Up StudiesHeart Valve ProsthesisEchocardiography, TransesophagealSeverity of Illness IndexHeart Valve DiseasesAtrial Function, LeftDoppler EffectPulmonary Wedge PressureHeart MurmursAtrial FibrillationPregnancy Complications, CardiovascularEchocardiography, Three-DimensionalHypertension, PulmonaryProspective StudiesTricuspid Valve InsufficiencyBlood Flow VelocityCalcinosisAortic Valve InsufficiencyEbstein AnomalyThrombosisHeart DiseasesHeart NeoplasmsRenal Artery ObstructionBalloon OcclusionRetrospective StudiesCardiac Surgical ProceduresTime FactorsAortic Stenosis, SubvalvularAtrial Function, RightMitral Valve AnnuloplastyRecurrenceMyxomaPhenindioneAortic Stenosis, SupravalvularEmbolismPredictive Value of TestsAtrial AppendageRheumatic FeverStentsCoronary AngiographyRisk FactorsCarotid Artery, InternalEndarterectomy, CarotidPostoperative ComplicationsUltrasonography, Doppler, DuplexAngioplasty, BalloonElectrocardiographyLaryngostenosisAortic ValveHeart VentriclesBlood PressureIntracranial Embolism and ThrombosisEndocarditisTricuspid Valve StenosisExercise TestDiscrete Subaortic StenosisPulmonary ArteryAngiographyDiastoleArterial Occlusive DiseasesPulmonary CirculationStroke VolumeMagnetic Resonance AngiographyEchocardiography, StressSystoleReoperationPyloric Stenosis, HypertrophicHeart SeptumTomography, X-Ray ComputedPulmonary VeinsReproducibility of Results