AntioxidantsMice, Inbred C57BLDisease Models, AnimalOxidative StressMice, KnockoutNitric Oxide Synthase Type IIInflammationMacrophagesSignal TransductionCells, CulturedTumor Necrosis Factor-alphaReactive Oxygen SpeciesMice, TransgenicCytokinesNitric OxideApoptosisGene Expression RegulationRNA, MessengerMyocardiumTime FactorsTreatment Outcome