Myocardial ContractionMeridiansMyocardiumVentricular Function, LeftHeartMyocardial Reperfusion InjuryMyocardial IschemiaDogsCoronary CirculationHemodynamicsRats, Sprague-DawleyMyocytes, CardiacMuscle ContractionSarcoplasmic Reticulum Calcium-Transporting ATPasesHeart VentriclesMyocardial StunningCardiotonic AgentsCalciumMyocardial ReperfusionVentricular FunctionVentricular PressureCardiomegalyMyosin Heavy ChainsSarcomeresPerfusionMuscle, SkeletalMyofibrilsHeart FailureVentricular Dysfunction, LeftMuscle FatigueMyocardial InfarctionEchocardiographyMitochondria, HeartDiaphragmVentricular RemodelingDisease Models, AnimalMuscle Fibers, SkeletalSarcoplasmic ReticulumCardiomyopathiesPhosphocreatineRepliconCalcium-Transporting ATPasesIsometric ContractionFatty Acids, VolatileIsoproterenolHeart Function TestsDobutamineRats, WistarCalcium SignalingPhysical Conditioning, AnimalAdrenergic beta-AgonistsTroponin ISodium-Calcium ExchangerOrgan SizeCyclic AMP-Dependent Protein Kinase RIIalpha SubunitMice, TransgenicStroke VolumeOxygen ConsumptionCardiomyopathy, DilatedCreatine Kinase, MM FormHeart RateReceptors, Adrenergic, betaDigitalisActin CytoskeletonMeckel DiverticulumMice, Inbred C57BLSystoleCell SizeCalcium-Binding ProteinsMuscle ProteinsSwineSarcolemmaPapillary MusclesVentricular MyosinsReceptors, Phospholipase A2CalsequestrinCoronary VesselsTissue SurvivalAdenosine TriphosphateCineangiographyLactic AcidCreatine KinaseIsotonic ContractionExcitation Contraction CouplingMuscle Fibers, Fast-TwitchMice, KnockoutSwine, MiniatureBlood PressureGlycolysisCardiac Pacing, ArtificialGated Blood-Pool ImagingModels, AnimalHypertrophy, Left VentricularAtrial Function, LeftCardiomyopathy, AlcoholicRecovery of FunctionRabbitsIschemic Preconditioning, MyocardialOxidation-ReductionAdaptation, Physiological