Stem CellsMyocytes, CardiacStem Cell TransplantationEmbryonic Stem CellsHematopoietic Stem CellsAdult Stem CellsPluripotent Stem CellsHeartMyocardiumHematopoietic Stem Cell TransplantationStem Cell NicheCell DifferentiationInduced Pluripotent Stem CellsNeural Stem CellsMesenchymal Stem Cell TransplantationCells, CulturedMultipotent Stem CellsMesenchymal Stromal CellsStem Cell FactorCardiac OutputCell LineageArrhythmias, CardiacMyoblasts, CardiacMyocardial ContractionStem Cell ResearchHeart VentriclesCell ProliferationPlant StemsFetal Stem CellsCardiac Surgical ProceduresCardiomegalyTime FactorsRegenerationDeath, Sudden, CardiacSignal TransductionHematopoietic Stem Cell MobilizationCell Culture TechniquesMice, Inbred C57BLNeoplastic Stem CellsHeart DiseasesCell SeparationBone Marrow CellsModels, CardiovascularAnimals, NewbornTissue EngineeringMice, TransgenicCalciumGene Expression Regulation, DevelopmentalCardiomyopathiesRats, Sprague-DawleyCell LineOctamer Transcription Factor-3Cardiac Pacing, ArtificialFlow CytometryVentricular FunctionRegenerative MedicineModels, BiologicalEmbryo, MammalianTransplantation, HomologousBiological MarkersTransplantation, AutologousReverse Transcriptase Polymerase Chain ReactionGene Expression RegulationHematopoiesisPeripheral Blood Stem Cell TransplantationMyocardial InfarctionCardiac TamponadeCell SurvivalAntigens, CD34Totipotent Stem CellsDisease Models, AnimalPhenotypeHeart FailureImmunohistochemistryRNA, MessengerTranscription FactorsProto-Oncogene Proteins c-kitCardiac ElectrophysiologyMitochondria, HeartCardiac CatheterizationGene ExpressionAction PotentialsHomeodomain ProteinsVentricular RemodelingHeart Conduction SystemSarcolemmaMice, KnockoutMuscle CellsCoculture TechniquesSOXB1 Transcription FactorsApoptosisGene Expression ProfilingFibroblastsSpermatogoniaMyofibrilsColony-Forming Units AssayCell- and Tissue-Based TherapyHeart AtriaSarcomeresHeart Arrest