HeartMEF2 Transcription FactorsMyogenic Regulatory FactorsHeart RateHeart FailureHeart DiseasesHeart TransplantationHeart Defects, CongenitalFetal HeartHeart ValvesHeart AtriaHeart BlockMyocardiumHeart Arrest, InducedHeart Function TestsMyocardial ContractionMyocardial IschemiaMyocytes, CardiacCoronary DiseaseHemodynamicsCardiac Output, LowVentricular Function, LeftTime FactorsHeart, ArtificialHeart Failure, SystolicPerfusionCardiomyopathy, DilatedCardiomegalyMyocardial InfarctionHeart InjuriesHeart Rate, FetalHeart SeptumCardiotonic AgentsRheumatic Heart DiseaseStroke VolumeCardiomyopathiesEchocardiographyMyocardial Reperfusion InjuryHeart ArrestRisk FactorsHeart Valve ProsthesisVentricular Dysfunction, LeftAdrenergic beta-AntagonistsHeart Failure, DiastolicAmerican Heart AssociationVentricular RemodelingDogsProspective StudiesOxygen ConsumptionFollow-Up StudiesAutonomic Nervous SystemCardiac Pacing, ArtificialHeart Septal DefectsHypoplastic Left Heart SyndromeHeart NeoplasmsRats, Sprague-DawleyChronic DiseaseNational Heart, Lung, and Blood Institute (U.S.)Natriuretic Peptide, BrainDisease Models, AnimalRats, WistarVentricular PressureTreatment OutcomeExercise TestSympathetic Nervous SystemModels, CardiovascularSystoleEndocardiumDiastoleIsoproterenolPropanolaminesHeart Septal Defects, VentricularBiological MarkersIschemic Preconditioning, MyocardialRabbits