Brugada SyndromeAjmalineBundle-Branch BlockVentricular FibrillationSyndromeElectrocardiographySodium ChannelsDeath, Sudden, CardiacSyncopeHeart Conduction SystemAnti-Arrhythmia AgentsFlecainideElectrophysiologic Techniques, CardiacArrhythmias, CardiacTachycardia, VentricularDefibrillators, ImplantableSodium Channel BlockersQuinidineProcainamideLong QT SyndromeVoltage-Gated Sodium Channel beta-1 SubunitVoltage-Gated Sodium Channel beta-3 SubunitMuscle ProteinsMutation, MissenseArrhythmogenic Right Ventricular DysplasiaHeredityTerfenadineMidodrineMutationMexiletinePericardiumAction PotentialsEndocardiumLidocainePedigreePre-Excitation SyndromesDNA Mutational AnalysisCardiac ElectrophysiologyAutonomic Nervous System DiseasesHeart VentriclesBody Surface Potential MappingDeath, SuddenSick Sinus SyndromeWeb BrowserElectric CountershockHeart ArrestChannelopathiesPhenotypeElectrocardiography, AmbulatoryPatch-Clamp Techniques