Brugada SyndromeSyndromeNAV1.5 Voltage-Gated Sodium ChannelAjmalineBundle-Branch BlockVentricular FibrillationElectrocardiographySodium ChannelsDeath, Sudden, CardiacHeart Conduction SystemSyncopeFlecainideElectrophysiologic Techniques, CardiacAnti-Arrhythmia AgentsArrhythmias, CardiacTachycardia, VentricularDefibrillators, ImplantableLong QT SyndromeQuinidineVoltage-Gated Sodium Channel beta-1 SubunitSodium Channel BlockersProcainamideMutation, MissenseMuscle ProteinsMutationVoltage-Gated Sodium Channel beta-3 SubunitArrhythmogenic Right Ventricular DysplasiaPedigreeMidodrineDNA Mutational AnalysisSick Sinus SyndromeTerfenadineHeredityEndocardiumPhenotypeMexiletineDown SyndromeAction PotentialsPericardiumMetabolic Syndrome XCardiac ElectrophysiologyPre-Excitation SyndromesAutonomic Nervous System DiseasesDeath, SuddenLidocaineBody Surface Potential MappingWeb BrowserHeart VentriclesHeart ArrestChannelopathiesElectric CountershockElectrocardiography, AmbulatoryGenetic TestingHeterozygote DetectionPatch-Clamp TechniquesDisopyramideSjogren's SyndromePinacidilPropafenoneFollow-Up StudiesGenetic Predisposition to DiseaseNephrotic SyndromeRisk FactorsSignal Processing, Computer-AssistedCase-Control StudiesHeterozygotePredictive Value of TestsRetrospective Studies