Cardiac ElectrophysiologyElectrophysiologyElectrophysiological PhenomenaElectrophysiological ProcessesElectrophysiologic Techniques, CardiacAction PotentialsPatch-Clamp TechniquesArrhythmias, CardiacHeart Conduction SystemMembrane PotentialsModels, CardiovascularVoltage-Sensitive Dye ImagingAtrioventricular NodeCatheter AblationHeart AtriaNeuronsBody Surface Potential MappingTachycardia, SupraventricularElectrocardiographyMagnetic Resonance Imaging, InterventionalAccessory Atrioventricular BundleCardiac Pacing, ArtificialHeartAtrial FunctionIon ChannelsNeurophysiologyElectroretinographyMyocytes, CardiacAtrial FibrillationSodium ChannelsIon Channel GatingBundle of HisCalciumComputer SimulationPotassium ChannelsRats, Sprague-DawleyMicroelectrodesElectric StimulationRefractory Period, ElectrophysiologicalPotassium Channels, Voltage-GatedDogsSodium Channel BlockersEpicardial MappingTime FactorsEther-A-Go-Go Potassium ChannelsPleural CavityElectroencephalographyNAV1.5 Voltage-Gated Sodium ChannelSynapsesOptogeneticsCalcium SignalingHeart BlockVentricular FunctionSynaptic TransmissionXenopus laevisElectrodes, ImplantedElectrodiagnosisElectrooculographyHeart VentriclesEquipment DesignPacemaker, Artificialgamma-Aminobutyric AcidDelayed Rectifier Potassium ChannelsTachycardia, ParoxysmalNeural ConductionHippocampusEvoked PotentialsOocytesElectrodesTachycardia, VentricularTachycardia, Atrioventricular Nodal ReentryAnti-Arrhythmia AgentsPotassiumHEK293 CellsCalcium Channels, L-TypeElectric ConductivityAtrial FlutterKCNQ Potassium ChannelsPurkinje FibersPotassium Channel BlockersDose-Response Relationship, DrugPericardiumDisease Models, AnimalLong QT SyndromeTachycardia, Ectopic AtrialPulmonary VeinsNerve NetRetinaMuscle CellsCells, CulturedLigand-Gated Ion ChannelsCalcium Channels, T-TypeSinoatrial NodeEvoked Potentials, VisualWolff-Parkinson-White SyndromeGuinea PigsModels, BiologicalAnimals, NewbornReceptors, GABA-ASomatosensory Cortex