Refractory Period, ElectrophysiologicalAnti-Arrhythmia AgentsRefractory Period, PsychologicalHeart Conduction SystemPropafenoneAtrial FibrillationSotalolFlecainideProcainamideAmiodaroneArrhythmias, CardiacHeart AtriaMexiletineAtrioventricular NodeDisopyramideElectrocardiographyCardiac Pacing, ArtificialAtrial FunctionAction PotentialsDogsQuinidineElectrophysiologyElectrophysiologic Techniques, CardiacTachycardiaVentricular FibrillationLidocaineBundle of HisBepridilTachycardia, VentricularHeartCardiac Complexes, PrematureCatheter AblationAtrial FlutterWolff-Parkinson-White SyndromePhenethylaminesVentricular FunctionElectric CountershockNeural ConductionElectric StimulationTachycardia, SupraventricularHeart VentriclesHeart BlockTachycardia, ParoxysmalHeart RatePapillary MusclesPulmonary VeinsTachycardia, Atrioventricular Nodal ReentryGuinea PigsPotassium Channel BlockersSinoatrial NodeTocainideTime FactorsPurkinje FibersPericardiumSodium ChannelsSodium Channel BlockersAcetanilidesTreatment OutcomeAprindineRecurrencePotassium ChannelsAnemia, RefractoryVerapamilTachycardia, Ectopic AtrialDose-Response Relationship, DrugToesSulfonamidesPiperidinesMyocardial ContractionAtrial Premature ComplexesAdrenergic beta-AntagonistsAporphinesPacemaker, ArtificialMyocardiumPyrimidinonesElectrocardiography, AmbulatoryPropranololElectrophysiological PhenomenaRabbitsEncainideVagus NerveEndocardiumPropanolaminesAconitineMembrane PotentialsEvoked PotentialsCalcium Channel BlockersFollow-Up StudiesDigitalis GlycosidesAtrial Function, RightPotassium Channels, Voltage-GatedAutonomic Nervous SystemAjmalineModels, CardiovascularMoricizineSchizophrenia, CatatonicDisease Models, AnimalVagus Nerve StimulationAnesthesiaNervous System Physiological Phenomena