Chagas CardiomyopathyHeartCardiomyopathiesMyocardiumMyocytes, CardiacHeart RateHeart FailureVentricular Dysfunction, LeftHeart DiseasesErectile DysfunctionHeart TransplantationHeart Defects, CongenitalFetal HeartHeart ValvesHeart AtriaMyocardial ContractionVentricular DysfunctionHeart BlockTime FactorsDisease Models, AnimalHeart Function TestsHemodynamicsVentricular Function, LeftMyocardial IschemiaSexual Dysfunction, PhysiologicalEchocardiographyEndothelium, VascularHeart Arrest, InducedStroke VolumeSexual Dysfunctions, PsychologicalDiastoleRisk FactorsVentricular Dysfunction, RightHeart Failure, DiastolicCoronary DiseaseCardiac Output, LowCardiomyopathy, DilatedVentricular RemodelingRats, Sprague-DawleyMyocardial InfarctionProspective StudiesCardiomegalyOxidative StressCardiotonic AgentsSystoleTreatment OutcomeBiological MarkersHeart Failure, SystolicFollow-Up StudiesRats, WistarMyocardial Reperfusion InjuryVasodilator AgentsMice, Inbred C57BLAutonomic Nervous System DiseasesVasodilationChronic DiseasePerfusionNatriuretic Peptide, BrainDogsMitochondriaNitric OxideSeverity of Illness IndexAdrenergic beta-AntagonistsPrimary Graft DysfunctionHeart Valve ProsthesisAutonomic Nervous SystemMice, KnockoutHeart InjuriesVentricular PressureEchocardiography, DopplerOxygen ConsumptionPenile ErectionHeart SeptumHeart, ArtificialHeart ArrestAgingCase-Control StudiesPredictive Value of TestsDose-Response Relationship, DrugRheumatic Heart DiseaseHeart Rate, FetalRetrospective StudiesCells, CulturedExercise TestCardiac Pacing, ArtificialReactive Oxygen SpeciesPrognosisHypertrophy, Left VentricularFibrosisCardiovascular DiseasesKidneySignal TransductionMultiple Organ FailureCalciumMitochondrial DiseasesNitric Oxide Synthase Type IIIRNA, MessengerCohort StudiesImpotence, VasculogenicAmerican Heart Association