Ventricular Function, LeftVentricular Dysfunction, LeftStroke VolumeVentricular Dysfunction, RightVentricular DysfunctionEchocardiographyHeart VentriclesVentricular Function, RightMyocardial InfarctionMyocardial ContractionHeartHeart FailureSystoleHemodynamicsRadionuclide VentriculographyVentricular FunctionElectrocardiographyDiastoleMyocardiumGated Blood-Pool ImagingCardiomyopathy, DilatedEchocardiography, DopplerCoronary CirculationCardiomyopathiesVentricular RemodelingHeart Function TestsMyocardial IschemiaRadionuclide AngiographyTime FactorsDobutamineCoronary DiseaseHypertrophy, Left VentricularFollow-Up StudiesTreatment OutcomeCardiac CatheterizationCardiotonic AgentsHeart RateExercise TestNatriuretic Peptide, BrainProspective StudiesMitral Valve InsufficiencyCardiac VolumeTomography, Emission-Computed, Single-PhotonVentricular PressureCoronary Artery BypassPredictive Value of TestsCardiac OutputBlood PressureMyocardial StunningCineangiographyCoronary AngiographyCardiac Pacing, ArtificialHeart DiseasesAngiocardiographyPrognosisEchocardiography, Doppler, PulsedAortic Valve StenosisVentriculography, First-PassDogsMyocardial ReperfusionAtrial Function, LeftMagnetic Resonance Imaging, CineTissue SurvivalMitral ValveAdrenergic beta-AntagonistsEchocardiography, Doppler, ColorCoronary VesselsTechnetium Tc 99m SestamibiEchocardiography, StressMyocardial RevascularizationThallium RadioisotopesCardiac Output, LowDisease Models, AnimalAngiotensin-Converting Enzyme InhibitorsArrhythmias, CardiacSeverity of Illness IndexChronic DiseaseAngioplasty, Balloon, CoronaryTakotsubo CardiomyopathyMyocardial Reperfusion InjuryAngina PectorisPhonocardiographyRecovery of FunctionAortic ValveRetrospective StudiesTransposition of Great VesselsGold RadioisotopesBiological MarkersRisk FactorsCardiac Surgical ProceduresHeart AtriaHeart Valve ProsthesisCoronary Artery DiseaseHeart Valve Prosthesis ImplantationAnalysis of VarianceCardiomegalyRadiopharmaceuticalsMyocarditisExercise ToleranceMyocytes, Cardiac