Introducing the world's smallest pacemaker 💜 The device is so tiny, it can fit inside the tip of a syringe—and be non-invasively injected into the body. This new pacemaker is particularly well-suited to the tiny, fragile hearts of newborn babies with congenital heart defects. | Northwestern University

Northwestern University engineers have developed the world's smallest pacemaker, which is light-activated and can be injected non-invasively, offering a new potential treatment for newborns with congenital heart defects. CNN's Jacqueline Howard speaks to a biomedical engineer about the sesame-sized pacemaker. | CNN