Misato Koakutsu, cardiac research fellow at the Johns Hopkins University School of Medicine, discusses the development of pacemaker and surrounding cells that can be injected directly into a patient’s heart. This was the topic of her presentation during the Eighth World Congress of Pediatric Cardiology and Cardiac Surgery. A research team generated these cells from human induced pluripotent stem cells (hiPSCs) to mimic in vivo pacemaker tissue. With pediatric patients having limitations regarding device implantation, the hiPSC-derived biological pacemakers could help overcome this issue.