Cardiac ElectrophysiologyElectrophysiological ProcessesEpicardial MappingElectrophysiologic Techniques, CardiacModels, CardiovascularArrhythmias, CardiacHeartElectrophysiologyHeart Conduction SystemVoltage-Sensitive Dye ImagingElectrophysiological PhenomenaMyocytes, CardiacAction PotentialsElectrocardiographyAtrioventricular NodeHeart VentriclesComputer SimulationCatheter AblationLong QT SyndromeMyocardiumHeart RatePotassium ChannelsCardiac OutputAlgorithmsDeath, Sudden, CardiacCardiac Surgical ProceduresCardiac Pacing, ArtificialPatch-Clamp TechniquesCardiomegalyCardiac CatheterizationHeart AtriaMyocardial ContractionHeart DiseasesMembrane PotentialsEncyclopedias as TopicDefibrillators, ImplantableFellowships and ScholarshipsMarylandPacemaker, Artificial