Heart FailureVentricular Function, LeftHeartIschemiaMyocardial IschemiaVentricular Dysfunction, LeftStroke VolumeHeart RateVentricular Function, RightMyocardiumEchocardiographyHeart VentriclesMyocytes, CardiacMyocardial ContractionVentricular FunctionBrain IschemiaHemodynamicsMyocardial InfarctionCardiac Output, LowTime FactorsCardiac OutputHeart DiseasesCardiomyopathy, DilatedVentricular RemodelingSystoleHeart Function TestsCardiac Pacing, ArtificialElectrocardiographyCardiotonic AgentsHeart Failure, SystolicDiastoleCardiomyopathiesArrhythmias, CardiacTreatment OutcomeHeart TransplantationNatriuretic Peptide, BrainProspective StudiesFollow-Up StudiesHeart Failure, DiastolicCardiomegalyMyocardial Reperfusion InjuryCardiac CatheterizationVentricular Dysfunction, RightAdrenergic beta-AntagonistsExercise TestDisease Models, AnimalDogsEchocardiography, DopplerCardiac Surgical ProceduresCoronary DiseaseChronic DiseaseHeart Defects, CongenitalBlood PressureCoronary CirculationHypertrophy, Left VentricularVentricular PressureDeath, Sudden, CardiacRadionuclide VentriculographyPredictive Value of TestsPrognosisHeart AtriaCardiac VolumeReperfusion InjuryVentricular DysfunctionRisk FactorsTreatment FailureRats, Sprague-DawleyGated Blood-Pool ImagingRetrospective StudiesRats, WistarMyocardial ReperfusionBiological MarkersRadionuclide AngiographySeverity of Illness IndexAngiotensin-Converting Enzyme InhibitorsHeart-Assist DevicesOxygen ConsumptionPropanolaminesExercise ToleranceDobutaminePacemaker, ArtificialAtrial Natriuretic FactorFibrosisCardiovascular AgentsRisk AssessmentCoronary VesselsFetal HeartMitral Valve InsufficiencyCoronary AngiographyMyocarditisCoronary Artery BypassMagnetic Resonance Imaging, CineDiureticsHeart ValvesMetoprololTomography, Emission-Computed, Single-PhotonHeart BlockCardiac Resynchronization TherapyHeart Arrest, InducedElectrocardiography, Ambulatory