OxygenHeartHeart RateOxygen ConsumptionReactive Oxygen SpeciesHeart FailureHeart DiseasesHeart Defects, CongenitalHeart TransplantationOxygen Inhalation TherapySinglet OxygenFetal HeartHeart ValvesHeart AtriaMyocardiumHeart BlockOxygen IsotopesHeart Arrest, InducedHemodynamicsTime FactorsMyocardial ContractionHeart Function TestsMyocardial IschemiaAnoxiaMyocytes, CardiacHyperbaric OxygenationPartial PressureOxidation-ReductionOxidative StressCoronary DiseasePerfusionHydrogen PeroxideOximetryVentricular Function, LeftCardiac Output, LowExercise TestRats, Sprague-DawleyDogsCardiotonic AgentsMyocardial Reperfusion InjuryStroke VolumeCardiomegalyMyocardial InfarctionCardiomyopathy, DilatedHeart Failure, SystolicHeart, ArtificialEchocardiographyAntioxidantsHeart ArrestRisk FactorsHeart InjuriesHeart Rate, FetalCardiomyopathiesCarbon DioxideRats, WistarHeart SeptumDisease Models, AnimalProspective StudiesRheumatic Heart DiseaseEnergy MetabolismSuperoxide DismutaseAdrenergic beta-AntagonistsVentricular Dysfunction, LeftHeart Valve ProsthesisMitochondriaHemoglobinsFree RadicalsRespirationHeart Failure, DiastolicCells, CulturedVentricular RemodelingFree Radical ScavengersChronic DiseaseKineticsTreatment OutcomeOxyhemoglobinsAmerican Heart AssociationAerobiosisCatalaseDose-Response Relationship, DrugFollow-Up StudiesCell HypoxiaNADPH OxidaseModels, CardiovascularSignal TransductionExerciseSuperoxidesRabbitsHyperoxiaNitric OxideAutonomic Nervous SystemCalciumHypoplastic Left Heart SyndromeRNA, MessengerAnaerobiosisSympathetic Nervous SystemVentricular PressureNatriuretic Peptide, BrainCardiac Pacing, ArtificialHeart Septal Defects