Atrial Function, LeftStroke VolumeVentricular Function, LeftAtrial FunctionVentricular Dysfunction, LeftHeart FailureAtrial Function, RightEchocardiographyGated Blood-Pool ImagingHeart AtriaEchocardiography, DopplerCardiomyopathy, DilatedRadionuclide VentriculographyMyocardial InfarctionRadionuclide AngiographyHeart VentriclesFollow-Up StudiesAtrial FibrillationHeart Function TestsNatriuretic Peptide, BrainElectrocardiographySystoleTreatment OutcomeMyocardial ContractionPredictive Value of TestsProspective StudiesHemodynamicsExercise TestHeartPrognosisVentriculography, First-PassHeart Failure, SystolicDefibrillators, ImplantableEchocardiography, Doppler, PulsedTime FactorsCardiomyopathiesElectric CountershockDiastoleCardiac Output, LowDeath, Sudden, CardiacAdrenergic beta-AntagonistsVentricular Function, RightHeart DiseasesTachycardia, VentricularTomography, Emission-Computed, Single-PhotonVentricular RemodelingElectrocardiography, AmbulatoryCardiac Pacing, ArtificialChronic DiseaseHeart RateMyocardiumMyocardial IschemiaVentricular FunctionPropanolaminesSeverity of Illness IndexExercise ToleranceRetrospective Studies3-IodobenzylguanidineRisk FactorsMagnetic Resonance Imaging, CineCineangiographyAortic Valve StenosisCardiac OutputHeart Failure, DiastolicCardiac CatheterizationCardiotonic AgentsCoronary DiseaseArrhythmias, CardiacObserver VariationBiological MarkersCoronary Artery BypassCheyne-Stokes RespirationCardiac Resynchronization TherapyCoronary AngiographyMitral Valve InsufficiencyRisk AssessmentSurvival AnalysisCarbazolesSurvival RateVentricular Dysfunction, RightProportional Hazards ModelsAngioplasty, Balloon, CoronaryMultivariate AnalysisChi-Square DistributionVentricular FibrillationKaplan-Meier EstimatePericardiectomyAngiotensin-Converting Enzyme InhibitorsCardiac VolumeDobutamineTechnetium Tc 99m SestamibiMyocardial Perfusion ImagingAngiocardiographyHypertrophy, Left VentricularCardiac-Gated Single-Photon Emission Computer-Assisted TomographyCoronary CirculationHeart Valve Prosthesis ImplantationROC CurveCoronary Artery DiseasePulmonary Wedge Pressure