CardiomyopathiesCardiomyopathy, RestrictiveCardiomyopathy, DilatedCardiomyopathy, HypertrophicCardiomyopathy, Hypertrophic, FamilialMyocardiumArrhythmogenic Right Ventricular DysplasiaChagas CardiomyopathyVentricular Function, LeftIsolated Noncompaction of the Ventricular MyocardiumVentricular Dysfunction, LeftSarcomeresMyocarditisHeart DiseasesCardiac MyosinsHeart VentriclesMyocytes, CardiacArrhythmias, CardiacHypertrophy, Left VentricularEchocardiographyHeart FailureDesminGenetic TestingEndomyocardial FibrosisMitochondrial DiseasesDeath, Sudden, CardiacHeartMutationMyocardial ContractionCardiomegalySarcoglycansMagnetic Resonance Imaging, CineElectrocardiographyTroponin TMitochondria, HeartMyosin Heavy ChainsPhenotypeDiastolePedigreeStroke VolumeDisease Models, AnimalVentricular RemodelingMyofibrilsMutant ProteinsSportsMyocardial IschemiaMutation, MissenseFibrosisDystrophinAtrial Function, LeftContrast MediaDiabetic CardiomyopathiesCalciumHeart TransplantationMuscle ProteinsBiopsyMice, TransgenicPredictive Value of TestsMagnetic Resonance ImagingCase-Control StudiesGenetic Predisposition to DiseaseTime FactorsRetrospective StudiesDNA, MitochondrialPrognosisRisk FactorsCardiovascular DiseasesHeart AtriaMice, Inbred C57BLCells, Cultured