Torsades de PointesLong QT SyndromeTachycardiaElectrocardiographyAnti-Arrhythmia AgentsTachycardia, VentricularSotalolPhenethylaminesEther-A-Go-Go Potassium ChannelsAstemizoleTachycardia, SupraventricularTerfenadineAtrioventricular BlockHeart Conduction SystemCisaprideHeart BlockArrhythmias, CardiacBradycardiaAmiodaroneBepridilCardiac Complexes, PrematureMexiletineTachycardia, Atrioventricular Nodal ReentryQuinidineElectrophysiologic Techniques, CardiacMagnesium SulfateSyncopeTakotsubo CardiomyopathyDrug-Related Side Effects and Adverse ReactionsAcetanilidesPotassium Channels, Voltage-GatedPotassium Channel BlockersSulfonamidesDogsTachycardia, ParoxysmalTachycardia, Ectopic AtrialTachycardia, SinusCardiac Pacing, ArtificialVentricular Premature ComplexesHeart RateDelayed Rectifier Potassium ChannelsAction PotentialsHypokalemiaKCNQ1 Potassium ChannelProcainamideHeart VentriclesHeartVentricular FibrillationDisopyramideElectrocardiography, AmbulatoryElectrophysiologyCnidarian VenomsPrenylamineDrugs, InvestigationalCatheter AblationDrug Evaluation, PreclinicalHistamine H1 AntagonistsNAV1.5 Voltage-Gated Sodium ChannelAza CompoundsKCNQ Potassium ChannelsRabbitsTachycardia, Ectopic JunctionalPurkinje FibersPotassium ChannelsMethoxamineEndocardiumPacemaker, ArtificialAtrial FibrillationDeath, Sudden, CardiacAtrial FlutterImidazolidinesPostural Orthostatic Tachycardia SyndromeChromansSodium Channel BlockersElectric CountershockPericardiumSodium ChannelsPiperidinesDrug OverdoseCation Transport ProteinsTachycardia, ReciprocatingHeart ArrestTachycardia, Sinoatrial Nodal ReentryDose-Response Relationship, Drug