Brugada SyndromeSyndromeNAV1.5 Voltage-Gated Sodium ChannelAjmalineBundle-Branch BlockVentricular FibrillationElectrocardiographySodium ChannelsDeath, Sudden, CardiacHeart Conduction SystemSyncopeFlecainideElectrophysiologic Techniques, CardiacAnti-Arrhythmia AgentsArrhythmias, CardiacTachycardia, VentricularLong QT Syndrome