Brugada SyndromeVentricular FibrillationAtrial FibrillationSyndromeElectrocardiographyNAV1.5 Voltage-Gated Sodium ChannelAjmalineBundle-Branch BlockAnti-Arrhythmia AgentsElectric CountershockDeath, Sudden, CardiacArrhythmias, CardiacHeart Conduction SystemTachycardia, VentricularHeart ArrestElectrophysiologic Techniques, CardiacSodium ChannelsDefibrillators, ImplantableFlecainideCardiopulmonary ResuscitationSyncopeDefibrillatorsProcainamideBody Surface Potential MappingCardiac Pacing, ArtificialLong QT SyndromeQuinidineSodium Channel BlockersCatheter AblationPericardiumHeart AtriaEndocardiumDogsHeart VentriclesAmiodaroneAction PotentialsResuscitationVoltage-Gated Sodium Channel beta-1 SubunitDeath, SuddenLidocaineElectrocardiography, AmbulatoryRefractory Period, ElectrophysiologicalCardiac Complexes, PrematureTachycardiaTime FactorsHeartHeart RateTreatment OutcomeMutation, MissenseMuscle ProteinsFollow-Up StudiesSick Sinus SyndromeCardiac ElectrophysiologyArrhythmogenic Right Ventricular DysplasiaDisopyramideMexiletineModels, CardiovascularPropafenonePulmonary VeinsHeart MassageRisk FactorsProspective StudiesSignal Processing, Computer-AssistedSwineVoltage-Gated Sodium Channel beta-3 SubunitRecurrenceMutationElectrophysiologyPredictive Value of TestsMyocardial IschemiaAtrial FlutterPedigreeOut-of-Hospital Cardiac ArrestMyocardiumWarfarinMyocardial InfarctionRetrospective StudiesDNA Mutational AnalysisVentricular Premature ComplexesAnticoagulantsHeart DiseasesMidodrineDisease Models, AnimalWolff-Parkinson-White SyndromeTerfenadineHeart BlockRisk AssessmentPre-Excitation SyndromesPhenotypeEpicardial MappingHeredityEmergency Medical ServicesSotalolVoltage-Sensitive Dye ImagingDown SyndromeBradycardiaMetabolic Syndrome XPacemaker, ArtificialAutonomic Nervous System DiseasesAtrial Appendage