Drug StabilityProtein StabilityEnzyme StabilityOptical Rotatory DispersionRNA StabilityCalorimetry, Differential ScanningPovidoneElectrocardiographyChemistry, PharmaceuticalTemperatureThermodynamicsSolubilityTechnology, PharmaceuticalHeart Conduction SystemExcipientsMethylcelluloseParticle SizeColloidsModels, MolecularDrug CompoundingProtein DenaturationWaterMolecular Sequence DataDrug CarriersArrhythmias, CardiacAir MovementsX-Ray DiffractionKineticsPowder DiffractionProtein FoldingPowdersLong QT SyndromeProtein ConformationSpectroscopy, Fourier Transform InfraredDosage FormsAmino Acid SequenceCircular DichroismTime FactorsHydrogen-Ion ConcentrationMutationHot TemperatureTorsades de PointesMagnetic Resonance SpectroscopyModels, BiologicalDrug StorageMelanophoresSuspensionsPoloxamerProtein Structure, TertiaryProtein Structure, SecondaryProtein BindingComputer SimulationFreeze DryingCrystallography, X-RayBase SequenceEmulsionsCrystallizationSurface PropertiesViscosityGenomic InstabilityRefractory Period, ElectrophysiologicalAction PotentialsPolyethylene GlycolsModels, TheoreticalNuclear Magnetic Resonance, BiomolecularVentricular FibrillationChemistry, PhysicalSotalolAerosolsSolutionsModels, ChemicalSolventsSurface-Active AgentsTabletsPericardiumPolymersPhysicochemical PhenomenaCardiac Complexes, PrematureMicroscopy, Electron, ScanningTachycardia, VentricularProteinsRNA, MessengerEscherichia coliMolecular StructureBinding SitesPhosphatidylcholinesGuanidineMolecular ConformationHydrogen BondingTransition TemperatureAnti-Arrhythmia AgentsCell LineVentricular FunctionScattering, RadiationNanoparticlesModels, CardiovascularNucleic Acid ConformationDogsStructure-Activity RelationshipHeart Ventricles