Refractory Period, ElectrophysiologicalRefractory Period, PsychologicalHeart Conduction SystemAtrioventricular NodeAtrial FunctionHeart AtriaCardiac Pacing, ArtificialAnti-Arrhythmia AgentsAtrial FibrillationAction PotentialsDogsBundle of HisElectrophysiologic Techniques, CardiacElectrocardiographyElectrophysiologyNeural ConductionSotalolPropafenoneWolff-Parkinson-White SyndromeVentricular FunctionFlecainideTachycardiaElectric StimulationHeart BlockDisopyramideArrhythmias, CardiacTachycardia, Atrioventricular Nodal ReentryProcainamideHeartVentricular FibrillationAnemia, RefractoryQuinidineToesTachycardia, ParoxysmalSinoatrial NodeMexiletinePericardiumCardiac Complexes, PrematureTachycardia, SupraventricularTime FactorsHeart VentriclesPapillary MusclesBepridilAmiodaroneElectric CountershockAtrial FlutterHeart RateCatheter AblationEvoked PotentialsGuinea PigsPurkinje FibersAtrial Function, RightTachycardia, VentricularSchizophrenia, CatatonicPotassium Channel BlockersVagus NerveVagus Nerve StimulationNervous System Physiological PhenomenaPeroneal NerveTreatment OutcomeAnemia, Refractory, with Excess of BlastsPhenethylaminesPacemaker, ArtificialLidocaineAutonomic Nervous SystemPulmonary VeinsSUNCT SyndromeGanglia, AutonomicTachycardia, Ectopic AtrialElectrophysiological PhenomenaMyocardial ContractionAccessory Atrioventricular BundleDose-Response Relationship, DrugRecurrenceEndocardiumSick Sinus SyndromeRabbitsAporphinesSodium ChannelsModels, CardiovascularSulfinpyrazoneVerapamilPeripheral NervesPre-Excitation SyndromesAxonsSalvage TherapyBody Surface Potential MappingMyocardiumAtrial Premature ComplexesDifferential ThresholdPropranololDisease Models, AnimalPotassium ChannelsMembrane PotentialsBenzylisoquinolinesSulfonamidesAtrial Function, LeftMedian NervePerfusionGoats