Brugada SyndromeSyndromeNAV1.5 Voltage-Gated Sodium ChannelAjmalineDeath, Sudden, CardiacBundle-Branch BlockVentricular FibrillationElectrocardiographyDeath, SuddenSodium ChannelsSyncopeHeart Conduction SystemFlecainideArrhythmias, CardiacAnti-Arrhythmia AgentsTachycardia, VentricularElectrophysiologic Techniques, CardiacDefibrillators, ImplantableLong QT SyndromeSudden Infant DeathQuinidineVoltage-Gated Sodium Channel beta-1 SubunitSodium Channel BlockersProcainamideMutation, MissenseMuscle ProteinsArrhythmogenic Right Ventricular DysplasiaVoltage-Gated Sodium Channel beta-3 SubunitMutationPedigreeMidodrineDNA Mutational AnalysisSick Sinus SyndromeTerfenadineHeredityEndocardiumMexiletineCardiac ElectrophysiologyAction PotentialsPre-Excitation SyndromesPericardiumDown SyndromeAutonomic Nervous System DiseasesPhenotypeMetabolic Syndrome XLidocaineHeart ArrestHeart VentriclesBody Surface Potential MappingElectrocardiography, AmbulatoryWeb BrowserElectric CountershockChannelopathiesGenetic TestingPatch-Clamp TechniquesRisk FactorsHeterozygote DetectionFollow-Up StudiesDisopyramideSignal Processing, Computer-AssistedPinacidilPropafenonePredictive Value of TestsGenetic Predisposition to DiseaseNephrotic SyndromeCase-Control StudiesSjogren's SyndromeHeterozygote