MyocardiumNeural ConductionHeart Conduction SystemMyocardial ContractionHeartAtrioventricular NodeHeart VentriclesDogsMyocardial StunningMyocytes, CardiacHeart BlockElectrocardiographyHeart AtriaAction PotentialsMuscle ContractionVentricular FunctionCardiac Pacing, ArtificialArrhythmias, CardiacMyocardial IschemiaVentricular Function, LeftCardiotonic AgentsCoronary CirculationMyocardial InfarctionTime FactorsUterine ContractionBone ConductionRefractory Period, ElectrophysiologicalMedian NerveCalciumElectric StimulationHemodynamicsModels, CardiovascularMyocardial Reperfusion InjuryElectrophysiologyHeart RateCardiomyopathiesElectrophysiologic Techniques, CardiacAtrial FunctionRats, Sprague-DawleyPericardiumEchocardiographyUlnar NerveCardiomegalyConnexin 43Heart FailureSinoatrial NodeCardiomyopathy, DilatedRabbitsDisease Models, AnimalPeripheral NervesVentricular RemodelingPerfusionRats, WistarDobutamineAtrioventricular BlockVentricular PressureMyocardial ReperfusionVentricular Dysfunction, LeftTibial NerveCatheter AblationPapillary MusclesMuscle, SmoothAphasia, ConductionAtrial FlutterAdrenergic beta-AgonistsAnti-Arrhythmia AgentsElectrodiagnosisAxonsGuinea PigsCoronary VesselsSural NervePurkinje FibersMyosin Light ChainsWolff-Parkinson-White SyndromeDose-Response Relationship, DrugSystoleAtrial FibrillationSwineMyometriumBody Surface Potential MappingSarcoplasmic Reticulum Calcium-Transporting ATPasesBlood PressureTachycardiaPeripheral Nervous System DiseasesStroke VolumeCells, CulturedActomyosinNAV1.5 Voltage-Gated Sodium ChannelSarcoplasmic ReticulumSodium ChannelsIsoproterenolGap JunctionsSciatic NerveMotor NeuronsConnexinsDiabetic NeuropathiesCardiac MyosinsElectric ConductivityTissue SurvivalReceptors, Adrenergic, beta