MyocarditisCoxsackievirus InfectionsEnterovirus B, HumanAutoimmune DiseasesMyocardiumEnterovirus InfectionsCardiomyopathy, DilatedAcute DiseaseBiopsyEnterovirusChagas CardiomyopathyDelayed DiagnosisEarly DiagnosisPrenatal DiagnosisSensitivity and SpecificityCardiovirus InfectionsEncephalomyocarditis virusRats, Inbred LewCardiac MyosinsPericarditisEndocardiumVirus DiseasesFatal OutcomeReoviridae InfectionsCardiomyopathiesRetrospective StudiesMyosinsDiagnosisHeartGiant CellsDisease Models, AnimalEdema, CardiacMice, Inbred BALB CTime FactorsTrypanosoma cruziElectrocardiographyAutoantibodiesTreatment OutcomeMagnetic Resonance ImagingParvovirus B19, HumanFollow-Up StudiesDiagnostic ErrorsPrognosisPredictive Value of TestsAutopsyEndomyocardial FibrosisEchocardiographyPolymerase Chain Reaction