Heart AtriaMyocardiumNeural ConductionHeart Conduction SystemHeart VentriclesHeartCerebral VentriclesAtrioventricular NodeMyocardial ContractionAtrial FunctionDogsThird VentricleFourth VentricleElectrocardiographyVentricular FunctionHeart BlockLateral VentriclesAction PotentialsCardiac Pacing, ArtificialMyocardial StunningCerebral Ventricle NeoplasmsElectrophysiologic Techniques, CardiacArrhythmias, CardiacRefractory Period, ElectrophysiologicalPericardiumMyocytes, CardiacAtrial FibrillationSinoatrial NodeCatheter AblationEchocardiographyMyocardial IschemiaModels, CardiovascularMyocardial InfarctionElectrophysiologyCoronary CirculationVentricular Function, LeftAtrial Function, RightHeart RateBone ConductionBody Surface Potential MappingPulmonary VeinsTime FactorsAtrial FlutterElectric StimulationMedian NerveCardiomyopathiesHemodynamicsEndocardiumHeart SeptumCardiomegalyAnti-Arrhythmia AgentsVentricular RemodelingConnexin 43Myocardial Reperfusion InjuryCardiomyopathy, DilatedCardiotonic AgentsGuinea PigsTachycardiaHeart FailureHeart Defects, CongenitalUlnar NerveDisease Models, AnimalHeart NeoplasmsFetal HeartAtrioventricular BlockVentricular Dysfunction, LeftPurkinje FibersWolff-Parkinson-White SyndromeVentricular Function, RightRabbitsRats, Sprague-DawleyPerfusionRats, WistarPeripheral NervesCoronary VesselsTibial NerveAxonsHeart DiseasesTricuspid ValveCardiac CatheterizationTachycardia, Atrioventricular Nodal ReentryAphasia, ConductionMyocardial ReperfusionConnexinsElectrodiagnosisStroke VolumeBundle-Branch BlockDiastoleSural NerveSodium ChannelsVentricular FibrillationSwineVentricular PressureNAV1.5 Voltage-Gated Sodium ChannelCalciumGap JunctionsBlood PressureSystoleMagnetic Resonance ImagingTachycardia, Supraventricular