Atrioventricular NodeTachycardia, Atrioventricular Nodal ReentryBundle of HisHeart AtriaHeart Conduction SystemSinoatrial NodeHeart BlockCatheter AblationCardiac Pacing, ArtificialLymph NodesElectrocardiographyTachycardia, SupraventricularTachycardia, ParoxysmalAtrial FunctionElectrophysiologic Techniques, CardiacWolff-Parkinson-White SyndromeAtrial FibrillationTachycardiaAtrial FlutterAtrial Function, RightRefractory Period, ElectrophysiologicalDogsHeart NeoplasmsElectrocoagulationElectrophysiologyTachycardia, Ectopic JunctionalAtrioventricular BlockSick Sinus SyndromeHeart RateHeartHeart SeptumAnti-Arrhythmia AgentsTachycardia, Ectopic AtrialPacemaker, ArtificialHeart VentriclesArrhythmias, CardiacLymph Node ExcisionAction PotentialsRabbitsVagus NerveBody Surface Potential MappingAutonomic AgentsSentinel Lymph Node BiopsyFollow-Up StudiesUltimobranchial BodyTricuspid ValveMyocardiumVena Cava, SuperiorRadio WavesTime FactorsTreatment OutcomeAdenosineVentricular FunctionPurkinje FibersMicroelectrodesModels, CardiovascularLymphatic MetastasisTachycardia, Sinoatrial Nodal ReentryVena Cava, InferiorConnexinsElectric StimulationVentricular Function, RightFistulaAtropineRanvier's NodesPre-Excitation SyndromesMyocardial ContractionPulmonary VeinsEchocardiography, TransesophagealMyxomaAccessory Atrioventricular BundlePre-Excitation, Mahaim-Type