Bhopal Accidental ReleaseHeart RateHeart FailureHeart DiseasesHeart TransplantationHeart Defects, CongenitalFetal HeartHeart ValvesHeart AtriaHeart BlockMyocardiumMyocardial ContractionHeart Arrest, InducedTime FactorsHeart Function TestsMyocardial IschemiaMyocytes, CardiacHemodynamicsCoronary DiseaseVentricular Function, LeftCardiac Output, LowPerfusionMyocardial InfarctionCardiomyopathy, DilatedHeart, ArtificialHeart Failure, SystolicCardiomegalyCardiotonic AgentsRisk FactorsDogsStroke VolumeEchocardiographyHeart SeptumHeart InjuriesHeart Rate, FetalCardiomyopathiesRheumatic Heart DiseaseMyocardial Reperfusion InjuryOxygen ConsumptionHeart ArrestProspective StudiesMaximum Tolerated DoseAdrenergic beta-AntagonistsDose-Response Relationship, DrugHeart Valve ProsthesisTreatment OutcomeVentricular Dysfunction, LeftRats, Sprague-DawleyFollow-Up StudiesHeart Failure, DiastolicAmerican Heart AssociationVentricular RemodelingRats, WistarExercise TestChromosomes, Human, Pair 16RabbitsDisease Models, AnimalCardiac Pacing, ArtificialChronic DiseaseAutonomic Nervous SystemCalciumModels, CardiovascularVentricular PressureSympathetic Nervous SystemHeart Septal DefectsHypoplastic Left Heart SyndromeHeart NeoplasmsNatriuretic Peptide, BrainNational Heart, Lung, and Blood Institute (U.S.)IsoproterenolSystoleDiastoleNorepinephrinePredictive Value of TestsPropanolaminesEndocardiumRNA, MessengerRetrospective StudiesBiological MarkersCohort StudiesReproducibility of ResultsPrognosisMuscle, SkeletalMolecular Sequence DataReference ValuesAge FactorsRisk AssessmentDouble-Blind MethodGuinea PigsElectrocardiography, AmbulatoryAndrogen AntagonistsHeart Septal Defects, VentricularExerciseAnti-Arrhythmia AgentsCardiovascular DiseasesCells, CulturedMyocarditisAction PotentialsEnergy MetabolismHeart-Assist Devices