Adrenergic AgentsAnti-Arrhythmia AgentsSympathomimeticsPropafenoneAmiodaroneFlecainideMexiletineProcainamideSotalolDisopyramideTocainideQuinidineAdrenergic AgonistsEpinephrinePhentolamineLidocaineArrhythmias, CardiacPropranololIsoproterenolAtrial FibrillationPhenethylaminesReceptors, AdrenergicMoricizineElectrocardiographyBepridilPyrimidinonesAtrial FlutterReceptors, Adrenergic, alphaPrazosinTachycardiaAdrenergic alpha-AgonistsPhenylephrineRefractory Period, ElectrophysiologicalTachycardia, VentricularAdrenergic alpha-AntagonistsHeart Conduction SystemSodium Channel BlockersAprindineVentricular FibrillationReceptors, Adrenergic, betaNorepinephrineAction PotentialsCardiac Complexes, PrematurePapillary MusclesGuinea PigsPiperidinesDogsHeart AtriaPotassium Channel BlockersHeartElectrophysiologyCatheter AblationPhenothiazinesTorsades de PointesHeart VentriclesElectric CountershockSulfonamidesPotassium ChannelsPurkinje FibersBenzofuransHeart RateAtrioventricular NodeSodium ChannelsTachycardia, SupraventricularCardiac Pacing, ArtificialMyocardiumPropanolaminesDose-Response Relationship, DrugVerapamilPyridinesPotassium Channels, Voltage-GatedAdrenergic beta-AntagonistsImidazolesRecurrencePulmonary VeinsPatch-Clamp TechniquesTreatment OutcomeEncainideAcetanilidesElectric StimulationInjections, IntravenousAconitineMembrane PotentialsTime FactorsMyocardial ContractionDigitalis GlycosidesFollow-Up StudiesAjmalineDigitalisRabbitsDefibrillators, ImplantableMyocardial InfarctionHemodynamicsElectrocardiography, AmbulatoryPotassiumElectrophysiologic Techniques, CardiacVentricular Premature ComplexesTachycardia, ParoxysmalEther-A-Go-Go Potassium ChannelsCross Circulation