Cardiac ElectrophysiologyElectrophysiologyElectrophysiological PhenomenaElectrophysiological ProcessesElectrophysiologic Techniques, CardiacAction PotentialsPatch-Clamp TechniquesTissue and Organ ProcurementArrhythmias, CardiacOrgan TransplantationHeart Conduction SystemMembrane PotentialsModels, CardiovascularVoltage-Sensitive Dye ImagingAtrioventricular NodeNeuronsCatheter AblationHeart AtriaMultiple Organ FailureHeartBody Surface Potential MappingTachycardia, SupraventricularElectrocardiographyMagnetic Resonance Imaging, InterventionalOrgan SizeAccessory Atrioventricular BundleOrgan of CortiCardiac Pacing, ArtificialIon ChannelsOrgan SpecificityAtrial FunctionNeurophysiologyElectroretinographyTime FactorsRats, Sprague-DawleyMyocytes, CardiacAtrial FibrillationSodium ChannelsComputer SimulationIon Channel GatingCalciumBundle of HisDogsPotassium ChannelsElectric StimulationMicroelectrodesRefractory Period, ElectrophysiologicalPotassium Channels, Voltage-GatedSodium Channel BlockersDisease Models, AnimalEpicardial MappingSynapsesEther-A-Go-Go Potassium ChannelsElectroencephalographyXenopus laevisCalcium SignalingPleural CavityModels, BiologicalSynaptic TransmissionNAV1.5 Voltage-Gated Sodium ChannelOptogeneticsVentricular FunctionHeart BlockEquipment DesignDose-Response Relationship, DrugHeart VentriclesMice, Inbred C57BLElectrodes, ImplantedCells, CulturedElectrodiagnosisElectrooculographygamma-Aminobutyric AcidNeural ConductionPacemaker, ArtificialDelayed Rectifier Potassium ChannelsVomeronasal OrganTachycardia, ParoxysmalAnimals, NewbornHippocampusEvoked PotentialsOocytesMyocardiumBrainMutationPotassiumHEK293 CellsElectrodesElectric ConductivityGuinea PigsSubfornical OrganTachycardia, VentricularTachycardia, Atrioventricular Nodal ReentryAnti-Arrhythmia AgentsPericardiumCalcium Channels, L-TypePotassium Channel BlockersAtrial FlutterRabbitsKCNQ Potassium ChannelsPurkinje Fibers