Myocytes, CardiacMyocardiumRats, Sprague-DawleyCells, CulturedRats, WistarHeartMyocardial ContractionHSP20 Heat-Shock ProteinsCardiomegalyMitochondria, HeartCardiotonic AgentsHeart VentriclesCalciumCalcium SignalingAnimals, NewbornCytosolEnzyme ActivationMyocardial Reperfusion InjuryMyocardial IschemiaMyocardial StunningAdrenergic beta-1 Receptor AgonistsCell SizeSarcomeresMyocardial InfarctionTime FactorsHypertrophySarcolemmaDiacetylSignal TransductionConnexin 43ApoptosisIsoproterenolAdrenergic beta-AgonistsSodium-Calcium ExchangerRNA, MessengerCardiomyopathiesSarcoplasmic ReticulumSarcoplasmic Reticulum Calcium-Transporting ATPasesCalcium Channels, L-TypeMuscle CellsEndothelin-1Atrial Natriuretic FactorCell HypoxiaCardiomyopathy, DilatedDisease Models, AnimalPhenylephrineDose-Response Relationship, DrugReceptors, Adrenergic, beta-1L-Lactate DehydrogenaseGATA4 Transcription FactorMyofibrilsAngiotensin IIReactive Oxygen SpeciesAdenoviridaeHeart FailureMicroscopy, ConfocalBlotting, WesternMuscle ProteinsCaspase 3PhosphorylationVentricular RemodelingPatch-Clamp TechniquesDogsEnzyme InhibitorsGene ExpressionGene Expression RegulationCell SurvivalImmunohistochemistryCell DifferentiationReceptors, Adrenergic, betaArrhythmias, CardiacAnoxiaCardiotoxinsProtein Kinase C-epsilonCoronary CirculationModels, CardiovascularMice, TransgenicAdrenergic alpha-AgonistsAction PotentialsReverse Transcriptase Polymerase Chain ReactionOxidative StressModels, AnimalMembrane Potential, MitochondrialHeart AtriaProtein Kinase CVentricular FunctionAdenosine TriphosphateCell EnlargementReceptors, Adrenergic, alpha-1Myosin Heavy ChainsCalcium-Binding ProteinsDiiodothyroninesHemodynamicsGap JunctionsCardiac MyosinsCytoprotectionUp-RegulationVentricular Function, LeftMyocardial ReperfusionBenzophenanthridines