Oxygen ConsumptionMyocardiumOxygenCoronary CirculationArrhythmias, CardiacDogsHemodynamicsHeartHeart RateMyocardial ContractionEnergy MetabolismCardiac OutputDobutamineBlood PressureCoronary VesselsLactatesLactic AcidPrenylamineCardiotonic AgentsVascular ResistancePhysical ExertionVentricular Function, LeftIsothiuroniumCardiac Pacing, ArtificialVentricular FunctionElectrocardiographyHeart VentriclesCarbon RadioisotopesArrhythmia, SinusAdenosineMyocardial StunningMyocardial IschemiaTomography, Emission-ComputedPerfusionAcetatesPropranololExtracorporeal CirculationStroke VolumeReactive Oxygen SpeciesCarbon DioxideHeart Arrest, InducedVeratrineNitric OxideHeart FailureAdrenergic beta-AntagonistsCoronary DiseaseCalcium ChlorideHalothaneCardiomyopathy, DilatedMitochondria, HeartTime FactorsVentricular PressureModels, CardiovascularPhosphocreatineGlucoseAnesthesiaNorepinephrineRegional Blood FlowHyperemiaSwineIsoproterenolVasodilator AgentsAngina PectorisPartial PressureMyocardial ReperfusionExercise TestMyocardial Reperfusion InjuryDose-Response Relationship, DrugAdenosine TriphosphateDepression, ChemicalBlood Flow VelocityVasodilationPhysical Conditioning, AnimalNitroglycerinCitric Acid CycleAdrenergic beta-AgonistsEchocardiographyTachycardia, VentricularDiastoleBradykininAnti-Arrhythmia AgentsTheophyllineFatty AcidsSystoleFatty Acids, NonesterifiedNitroarginineEnzyme InhibitorsIsofluraneNitric Oxide SynthaseNG-Nitroarginine Methyl EsterCardiomegalyVentricular FibrillationRabbitsGuinea PigsAlcohol DrinkingVentricular Dysfunction, LeftDisease Models, AnimalOxidation-ReductionBlood VolumeBlood Gas Analysis