Oxygen ConsumptionOxygenCoronary CirculationMyocardiumDogsHemodynamicsEnergy MetabolismHeartHeart RateMyocardial ContractionCardiac OutputDobutamineBlood PressureLactic AcidLactatesReactive Oxygen SpeciesCoronary VesselsPhysical ExertionVascular ResistancePrenylamineCardiotonic AgentsVentricular Function, LeftIsothiuroniumVentricular FunctionCarbon DioxideCarbon RadioisotopesAdenosineMyocardial StunningTomography, Emission-ComputedPerfusionCardiac Pacing, ArtificialAcetatesPartial PressureGlucoseMyocardial IschemiaNitric OxideExercise TestPropranololStroke VolumeExtracorporeal CirculationRegional Blood FlowHeart VentriclesMitochondria, HeartTime FactorsVeratrinePhosphocreatineAlcohol DrinkingHeart Arrest, InducedHeart FailureAdenosine TriphosphateCalcium ChlorideNorepinephrineCoronary DiseaseSwineHalothaneAdrenergic beta-AntagonistsVentricular PressureHyperemiaCardiomyopathy, DilatedDose-Response Relationship, DrugAnesthesiaVasodilator AgentsOxidation-ReductionExercisePhysical Conditioning, AnimalMitochondriaCitric Acid CycleBlood Flow VelocityOxygen Inhalation TherapyDepression, ChemicalPolarographyIsoproterenolAngina PectorisModels, CardiovascularVasodilationBody Temperature RegulationSinglet OxygenFatty AcidsCell RespirationMyocardial ReperfusionNitroglycerinBlood Gas AnalysisDietBradykininFatty Acids, NonesterifiedTheophyllineAdrenergic beta-AgonistsExercise ToleranceDiastoleEnzyme InhibitorsIon-Selective ElectrodesRespirationAnoxiaNitric Oxide SynthaseIsofluraneBody TemperatureNitroarginineSystoleBlood VolumeNG-Nitroarginine Methyl Ester