Atrial Function, LeftAtrial FunctionAtrial Function, RightStroke VolumeHeart AtriaVentricular Function, LeftEchocardiography, DopplerVentricular Dysfunction, LeftAtrial FibrillationEchocardiographyMyocardial ContractionHeart FailureEchocardiography, Doppler, PulsedHeart Function TestsElectric CountershockPericardiectomyHemodynamicsHeart VentriclesGated Blood-Pool ImagingVentricular FunctionSystoleObserver VariationEchocardiography, TransesophagealHypertrophy, Left VentricularCardiomyopathy, DilatedMyocardial InfarctionVentricular RemodelingDiastoleRadionuclide VentriculographyHeartBlood Flow VelocityRadionuclide AngiographyElectrocardiographyCardiac VolumeTreatment OutcomeFollow-Up StudiesTime FactorsProspective StudiesVentricular Function, RightPredictive Value of TestsExercise TestMyocardiumNatriuretic Peptide, BrainCardiomyopathiesMilk EjectionMagnetic Resonance Imaging, CineVentriculography, First-PassPrognosisCardiac Pacing, ArtificialHeart Failure, DiastolicCardiac Output, LowEchocardiography, Three-DimensionalCardiac OutputCardiac CatheterizationHeart DiseasesCineangiographyHeart RateTomography, Emission-Computed, Single-PhotonVentricular Dysfunction, RightHeart Failure, SystolicAortic Valve StenosisAdrenergic beta-AntagonistsMitral Valve InsufficiencyExercise ToleranceMyocardial IschemiaVentricular PressureDefibrillators, ImplantableSeverity of Illness IndexRetrospective StudiesBlood PressureCoronary DiseaseMitral ValveCardiotonic AgentsCoronary CirculationChronic DiseaseCoronary AngiographyAngiocardiographyTachycardia, VentricularCoronary Artery BypassReproducibility of ResultsRisk FactorsDobutamineArrhythmias, CardiacDeath, Sudden, CardiacPropanolaminesRisk AssessmentEchocardiography, Doppler, ColorCardiac Resynchronization TherapyVentricular DysfunctionBiological MarkersElectrocardiography, AmbulatoryPulmonary Wedge PressureMultivariate AnalysisSurvival RateEchocardiography, StressHeart Valve Prosthesis ImplantationSurvival AnalysisTechnetium Tc 99m SestamibiHeart AneurysmSubcellular Fractions