Refractory Period, ElectrophysiologicalRefractory Period, PsychologicalHeart Conduction SystemAtrioventricular NodeAtrial FunctionHeart AtriaAnti-Arrhythmia AgentsCardiac Pacing, ArtificialAtrial FibrillationAction PotentialsDogsBundle of HisElectrocardiographyElectrophysiologic Techniques, CardiacElectrophysiologyNeural ConductionSotalolPropafenoneWolff-Parkinson-White SyndromeVentricular FunctionFlecainideTachycardiaElectric StimulationHeart BlockDisopyramideArrhythmias, CardiacProcainamideTachycardia, Atrioventricular Nodal ReentryHeartVentricular FibrillationAnemia, RefractoryQuinidineToesTachycardia, ParoxysmalSinoatrial NodeTime FactorsMexiletinePericardiumCardiac Complexes, PrematureTachycardia, SupraventricularHeart VentriclesPapillary MusclesBepridilAmiodaroneElectric CountershockAtrial FlutterHeart RateCatheter AblationGuinea PigsEvoked PotentialsPurkinje FibersAtrial Function, RightTachycardia, VentricularTreatment OutcomePotassium Channel BlockersSchizophrenia, CatatonicVagus NerveVagus Nerve StimulationNervous System Physiological PhenomenaHistocompatibility Antigens Class IPeroneal NervePhenethylaminesAnemia, Refractory, with Excess of BlastsPacemaker, ArtificialLidocaineAutonomic Nervous SystemPulmonary VeinsDose-Response Relationship, DrugSUNCT SyndromeGanglia, AutonomicElectrophysiological PhenomenaMyocardial ContractionTachycardia, Ectopic AtrialHistocompatibility Antigens Class IIAccessory Atrioventricular BundleRabbitsRecurrenceEndocardiumSick Sinus SyndromeSodium ChannelsAporphinesModels, CardiovascularSulfinpyrazonePeripheral NervesVerapamilAxonsPre-Excitation SyndromesMyocardiumSalvage TherapyDisease Models, AnimalBody Surface Potential MappingAtrial Premature ComplexesSulfonamidesDifferential ThresholdMembrane PotentialsPotassium ChannelsPropranololBenzylisoquinolinesAtrial Function, LeftMedian Nerve