Electrophysiologic Techniques, CardiacElectrophysiologyHeart Conduction SystemCardiac Pacing, ArtificialElectrocardiographyArrhythmias, CardiacWolff-Parkinson-White SyndromeMyocytes, CardiacTachycardia, SupraventricularPre-Excitation SyndromesAnti-Arrhythmia AgentsSubstrate SpecificityTachycardiaTachycardia, VentricularHeartDeath, Sudden, CardiacAtrioventricular NodeHeart AtriaVentricular FibrillationCatheter AblationCardiac OutputTachycardia, Atrioventricular Nodal ReentryDogsRefractory Period, ElectrophysiologicalHeart VentriclesProcainamideAction PotentialsAmiodaroneTachycardia, Sinoatrial Nodal ReentryElectrocardiography, AmbulatoryElectrodiagnosisAtrial FibrillationSyncopeCardiac Surgical ProceduresTime FactorsKineticsDeath, SuddenEpicardial MappingMyocardiumCardiac CatheterizationAtrial FunctionBody Surface Potential MappingTachycardia, ParoxysmalCardiac ElectrophysiologyTachycardia, Ectopic AtrialHeart ArrestSinoatrial NodeHeart DiseasesMolecular Sequence DataMyocardial ContractionBundle of HisPurkinje FibersHeart RatePolyneuropathiesSotalolFollow-Up StudiesAmino Acid SequenceNeural ConductionDefibrillators, ImplantableHeart BlockCardiac Complexes, PrematureElectric CountershockQuinidineCardiomyopathiesHeart FailureBundle-Branch BlockAtrial FlutterBrugada SyndromeCardiomegalyRats, Sprague-DawleyVentricular DysfunctionUlnar NeuropathiesCardiac TamponadeBinding SitesEndocardiumElectrocoagulationEnfluraneTreatment OutcomePericardiumMonitoring, PhysiologicHemodynamicsDisease Models, AnimalMyocardial InfarctionRabbitsEchocardiographyPulmonary VeinsBupivacaineHalothaneLidocaineCatalysisStroke VolumeVentricular FunctionRecurrenceElectroretinographyProspective StudiesNAV1.5 Voltage-Gated Sodium ChannelPacemaker, ArtificialPapillary MusclesModels, MolecularArrhythmia, Sinus