DimethylpolysiloxanesSiliconesMicrofluidic Analytical TechniquesMicrotechnologyMicrofluidicsLab-On-A-Chip DevicesSiloxanesMyocytes, CardiacEquipment DesignNylonsSurface PropertiesSolid Phase MicroextractionPolystyrenesNanotechnologyCell Culture TechniquesSiliconSilicone ElastomersMicrochemistryCoated Materials, BiocompatiblePolymersSubstrate SpecificityBiocompatible MaterialsGlassEquipment Failure AnalysisMyocardiumMaterials TestingNanostructuresElectrodesMembranes, ArtificialMicroscopy, Electron, ScanningCalibrationCells, CulturedCell AdhesionKineticsHeartTime FactorsAnimals, NewbornCardiomegalyMolecular Sequence DataReproducibility of ResultsMyocardial ContractionAmino Acid SequenceRats, Sprague-DawleyHeart VentriclesRats, WistarCalciumBinding SitesPhosphorylationSignal TransductionMitochondria, Heart