August 31, 2018 · The team employed an electrohydrodynamic printing process known as melt electrowriting (MEW) to engineer 3D fiber scaffolds, which could help the newly-injected cells remain in the live heart and grow. The stretchable microfiber scaffold, which featured a hexagonal or beehive design, was combined with specialized stem cells, with the aim of supporting the cells and improving their maturation, the study said.