Myocardial IschemiaNeural ConductionHeart Conduction SystemElectrocardiographyMyocardial Reperfusion InjuryIschemiaArrhythmias, CardiacDogsMyocardiumCoronary DiseaseVentricular FibrillationAcute DiseaseMyocardial InfarctionHeart BlockCreatine KinaseCoronary CirculationAction PotentialsHeartHemodynamicsAnti-Arrhythmia AgentsMyocardial ReperfusionNerve BlockHeart RateTime FactorsBrain IschemiaCardiotonic AgentsVentricular Function, LeftHeart VentriclesAngina PectorisMotor Neuron DiseaseCoronary VesselsDisease Models, AnimalAtrial FlutterRats, Sprague-DawleyMyocardial ContractionPeripheral NervesSwineAtrioventricular NodeAtrioventricular BlockElectrophysiologic Techniques, CardiacCardiac Pacing, ArtificialElectrodiagnosisUlnar NerveBlood PressureCatheter AblationAxonsBody Surface Potential MappingElectrophysiologyHeart AtriaRefractory Period, ElectrophysiologicalElectric StimulationReperfusion InjuryExercise TestMedian NerveRanvier's NodesModels, CardiovascularTachycardiaSciatic NervePolyneuropathiesCardanolidesPericardiumMyocytes, CardiacPurkinje FibersSpinal Nerve RootsTricuspid ValveIschemic Preconditioning, MyocardialPeroneal NerveLeechesLidocaineImmunoglobulins, IntravenousPeripheral Nervous System DiseasesNerve Compression SyndromesPolyradiculoneuropathyElectrocardiography, AmbulatoryBrachial Plexus NeuritisSodium ChannelsAtrial Premature ComplexesElectrodesRabbitsGuillain-Barre SyndromeAtrial FibrillationRats, WistarMotor NeuronsSural NerveFasciculationEndocardiumDemyelinating DiseasesAtrial FunctionAtrial Function, RightBundle-Branch BlockVentricular FunctionNerve Fibers, MyelinatedParesthesiaNerve FibersSinoatrial NodeVenae CavaeCoronary AngiographyGap JunctionsTomography, Emission-Computed, Single-PhotonBradycardia