Atrial Function, LeftAtrial FunctionEchocardiographyAtrial Function, RightHeart AtriaHypertrophy, Left VentricularEchocardiography, DopplerVentricular Function, LeftHeart VentriclesCardiac VolumeStroke VolumeAtrial FibrillationVentricular Dysfunction, LeftEchocardiography, Doppler, PulsedElectrocardiographyEchocardiography, TransesophagealElectric CountershockMyocardial ContractionPericardiectomyHypertensionHeart Function TestsBlood PressurePredictive Value of TestsProspective StudiesObserver VariationVentricular FunctionHemodynamicsBlood Flow VelocityEchocardiography, Doppler, ColorMitral ValveMultivariate AnalysisCohort StudiesRisk FactorsEchocardiography, Three-DimensionalDiastoleSystoleMitral Valve InsufficiencyMitral Valve ProlapseMitral Valve StenosisAortic ValveHeart DiseasesVentricular Function, RightCardiac CatheterizationHeart SeptumHeart Valve DiseasesVentricular RemodelingHeart FailureAortic Valve InsufficiencyTricuspid ValveCardiomyopathiesAortic Valve StenosisTricuspid Valve InsufficiencyHeart Septal Defects, VentricularHeart Defects, CongenitalCardiomyopathy, HypertrophicVentricular Dysfunction, RightFollow-Up StudiesCardiomyopathy, DilatedHeartTreatment OutcomeHeart Valve ProsthesisReproducibility of ResultsHeart Septal Defects, AtrialRheumatic Heart DiseaseCardiac Pacing, ArtificialPericardial EffusionTime FactorsNatriuretic Peptide, BrainFetal HeartHeart NeoplasmsHeart Valve Prosthesis ImplantationMyocardial InfarctionMyocardiumSensitivity and SpecificityRetrospective StudiesHeart ValvesPrognosisMyxomaDobutamineSeverity of Illness IndexPulmonary ValveExercise TestEchocardiography, StressCardiac Resynchronization TherapyPulmonary ArteryHypertension, PulmonaryFeasibility StudiesCardiac Surgical ProceduresAngiocardiographyVentricular SeptumAortic CoarctationCoronary CirculationCatheterizationHeart AneurysmPulmonary Wedge PressureEbstein AnomalyVentricular PressureEndocardiumPulmonary VeinsChordae Tendineae