Oxygen ConsumptionOxygenMyocytes, CardiacReactive Oxygen SpeciesCardiac OutputHeartCardiac Surgical ProceduresArrhythmias, CardiacDeath, Sudden, CardiacOxygen Inhalation TherapySinglet OxygenMyocardiumCardiomegalyCardiac TamponadeCardiac Pacing, ArtificialHeart DiseasesMyocardial ContractionCardiac CatheterizationHeart ArrestHeart VentriclesTime FactorsHeart RateHemodynamicsHeart FailureMyoblasts, CardiacCardiomyopathiesElectrocardiographyOxygen IsotopesCardiac MyosinsCardiac Imaging TechniquesEchocardiographyCardiac GlycosidesCardiac Output, LowOut-of-Hospital Cardiac ArrestMyocardial InfarctionBlood PressureCardiac VolumeVentricular Function, LeftVentricular RemodelingOxidative StressHeart TransplantationAnoxiaPartial PressureTroponin IHyperbaric OxygenationDogsCells, CulturedRats, Sprague-DawleyHeart Defects, CongenitalStroke VolumeOxidation-ReductionHydrogen PeroxideHeart Function TestsTreatment OutcomeDisease Models, AnimalCardiotonic AgentsCardiopulmonary ResuscitationMyocardial IschemiaCalciumCardiac Resynchronization TherapyTroponin TModels, CardiovascularHeart Conduction SystemProspective StudiesVentricular Dysfunction, LeftOximetryCardiomyopathy, DilatedHeart NeoplasmsCardiac Care FacilitiesFibrosisCardiac ElectrophysiologyMitochondria, HeartSignal TransductionRats, WistarExercise TestFetal HeartVentricular FunctionCardiopulmonary BypassHeart AtriaCarbon DioxideAntioxidants