Cardiac Output, HighCardiac OutputMyocardiumHemodynamicsMyocytes, CardiacOrgan SpecificityHeartSensitivity and SpecificitySubstrate SpecificityMolecular Sequence DataBase SequenceArrhythmias, CardiacModels, CardiovascularAmino Acid SequenceTissue DistributionMyocardial ContractionHeart VentriclesRNA, MessengerTissue EngineeringPromoter Regions, GeneticGene Expression RegulationHeart Conduction SystemCardiac Surgical ProceduresEnhancer Elements, GeneticDeath, Sudden, CardiacTranscription, GeneticCardiomegalyTime FactorsHeart DiseasesCells, CulturedCardiac ElectrophysiologyCardiac Pacing, ArtificialCloning, MolecularCardiomyopathiesMice, TransgenicSpecies Specificity