HeartMyocardial ContractionMyocardiumVentricular Function, LeftMyocardial IschemiaCoronary CirculationHeart Function TestsHemodynamicsEchocardiographyMyocardial Reperfusion InjuryEchocardiography, DopplerVentricular Dysfunction, LeftSystoleVentricular PressureCardiomyopathiesEndocardiumDobutamineHeart VentriclesStroke VolumeMyocardial InfarctionDogsEchocardiography, Doppler, PulsedSwineMyocardial ReperfusionMyocytes, CardiacCoronary VesselsHeart RateDiastoleMyocardial StunningCardiotonic AgentsSwine, MiniatureMagnetic Resonance Imaging, CineVentricular FunctionVentricular RemodelingCardiac OutputPerfusionDisease Models, AnimalHeart FailureHeart DiseasesBlood PressureTime FactorsVentricular DysfunctionCardiomyopathy, DilatedOxygen ConsumptionRecovery of FunctionElectrocardiographyBlood Flow VelocityHeart SeptumEchocardiography, StressIschemic Preconditioning, MyocardialModels, AnimalRats, Sprague-DawleyCoronary DiseaseCardiomyopathy, HypertrophicHeart Arrest, InducedEchocardiography, Doppler, ColorVentricular Function, RightCardiopulmonary BypassRats, WistarPericardiumMitochondria, HeartCollateral CirculationRadionuclide VentriculographyPropanolaminesResuscitationTroponin IFetal HeartPapillary MusclesModels, CardiovascularReproducibility of ResultsCardiac VolumeCoronary Artery BypassExercise TestAnesthesia, InhalationCardiac CatheterizationCardiac Pacing, ArtificialObserver VariationIsoproterenolContrast MediaMyocarditisMagnetic Resonance ImagingReperfusion InjurySarcoplasmic Reticulum Calcium-Transporting ATPasesCreatine KinaseStress, MechanicalCardiomegalyFeasibility StudiesHypertrophy, Left VentricularCardiac Output, LowVascular ResistanceProspective StudiesHeart-Assist DevicesConsciousnessAnalysis of VarianceCalciumPredictive Value of TestsElasticity Imaging TechniquesNeovascularization, PhysiologicSus scrofaInjections