Cardiac CathetersCardiac CatheterizationCatheters, IndwellingCathetersCardiac ElectrophysiologyElectrophysiologyMyocytes, CardiacArrhythmias, CardiacCatheterizationHeartCatheterization, Central VenousCardiac OutputElectrophysiological PhenomenaElectrophysiological ProcessesCardiac Pacing, ArtificialElectrophysiologic Techniques, CardiacCardiac Surgical ProceduresCentral Venous CathetersDeath, Sudden, CardiacHeart Conduction SystemElectrocardiographyCatheterization, PeripheralHeart AtriaUrinary CatheterizationAction PotentialsEquipment DesignTime FactorsHeart VentriclesModels, CardiovascularEquipment FailureUrinary CathetersMyocardiumPatch-Clamp TechniquesAtrial FibrillationCardiac TamponadeHeart DiseasesAtrioventricular NodeMyocardial ContractionCardiomegalyBody Surface Potential MappingDogsCatheter-Related InfectionsHeart RateTreatment OutcomeMembrane PotentialsMagnetic Resonance Imaging, InterventionalRats, Sprague-DawleyHeart FailureProspective StudiesPulmonary VeinsHemodynamicsEchocardiographyHeart ArrestCalciumFluoroscopyVoltage-Sensitive Dye ImagingTachycardia, VentricularCatheter AblationCatheterization, Swan-GanzVentricular FunctionAtrial FunctionCardiac Imaging TechniquesDisease Models, AnimalAtrial FlutterRetrospective StudiesVentricular Function, LeftCardiomyopathiesPericardiumPacemaker, ArtificialNeuronsMyocardial InfarctionForeign-Body MigrationMyoblasts, CardiacBlood PressureAccessory Atrioventricular BundleSodium ChannelsHeart BlockBundle of HisFollow-Up StudiesCardiac MyosinsAnti-Arrhythmia AgentsIon ChannelsCells, CulturedCardiac VolumeTachycardia, SupraventricularFeasibility StudiesCardiac GlycosidesTachycardia, Atrioventricular Nodal ReentryJugular VeinsCardiac Output, LowWolff-Parkinson-White SyndromeEndocardiumNAV1.5 Voltage-Gated Sodium ChannelPotassium ChannelsRabbitsElectric StimulationDose-Response Relationship, DrugOut-of-Hospital Cardiac ArrestSubclavian VeinIon Channel Gating