Maxima Medisch Centrum Veldhoven 1 article published in JoVE Bioengineering Anatomically Realistic Neonatal Heart Model for Use in Neonatal Patient Simulators Mark Thielen1, Frank Delbressine1, Sidarto Bambang Oetomo1,2, Loe Feijs1 1Department of Industrial Design, Eindhoven University of Technology, 2Department of Neonatology, Máxima Medisch Centrum Veldhoven This protocol describes a procedure for creating functional artificial neonatal heart models by utilizing a combination of magnetic resonance imaging, 3D printing, and injection molding. The purpose of these models is for integration into the next generation of neonatal patient simulators and as a tool for physiological and anatomical studies.