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 BlockersProcainamideMuscle ProteinsMutation, MissenseVoltage-Gated Sodium Channel beta-3 SubunitArrhythmogenic Right Ventricular DysplasiaMutationMidodrinePedigreeSick Sinus SyndromeTerfenadineDNA Mutational AnalysisEndocardiumHeredityMexiletineDown SyndromeAction PotentialsPericardiumCardiac ElectrophysiologyMetabolic Syndrome XPre-Excitation SyndromesDeath, SuddenLidocainePhenotypeAutonomic Nervous System DiseasesBody Surface Potential MappingWeb BrowserHeart VentriclesHeart ArrestChannelopathiesElectric CountershockElectrocardiography, AmbulatoryGenetic TestingHeterozygote DetectionPatch-Clamp TechniquesDisopyramidePinacidilPropafenoneSignal Processing, Computer-AssistedNephrotic SyndromeGenetic Predisposition to DiseaseSjogren's SyndromeFollow-Up Studies