Torsades de PointesLong QT SyndromeAnti-Arrhythmia AgentsElectrocardiographySotalolPhenethylaminesEther-A-Go-Go Potassium ChannelsAstemizoleTerfenadineCisaprideAtrioventricular BlockArrhythmias, CardiacBradycardiaHeart BlockHeart Conduction SystemBepridilAmiodaroneMagnesium SulfateQuinidineTakotsubo CardiomyopathyCardiac Complexes, PrematurePotassium Channels, Voltage-GatedMexiletineDrug-Related Side Effects and Adverse ReactionsPotassium Channel BlockersSulfonamidesAcetanilidesDogsHeartSyncopeDelayed Rectifier Potassium ChannelsAction PotentialsTachycardiaMyocytes, CardiacKCNQ1 Potassium ChannelHypokalemiaHeart RateVentricular Premature ComplexesHeart VentriclesCardiac Pacing, ArtificialElectrophysiologic Techniques, CardiacDisopyramideCnidarian VenomsDrugs, InvestigationalDrug Evaluation, PreclinicalPrenylamineKCNQ Potassium ChannelsRabbitsAza CompoundsDeath, Sudden, CardiacHistamine H1 AntagonistsProcainamideNAV1.5 Voltage-Gated Sodium ChannelPotassium ChannelsPurkinje FibersMethoxamineTachycardia, VentricularElectrophysiologyVentricular FibrillationElectrocardiography, AmbulatoryHeart ArrestChromansImidazolidinesPacemaker, ArtificialSodium Channel BlockersSodium ChannelsCation Transport ProteinsPiperidinesVentricular FunctionDrug OverdoseAtrial FibrillationDose-Response Relationship, DrugPericardium