In a groundbreaking advancement for pediatric medicine, researchers at Northwestern University in the United States have developed the world’s smallest pacemaker — a wireless, battery-free device designed specifically to support the hearts of newborns suffering from congenital heart defects.
The miniature device measures just 3.5 millimeters in length, 1.8 millimeters in width, and 1 millimeter in thickness — small enough to be injected into the body using a standard syringe. This ultra-compact size allows for minimally invasive procedures, which are crucial for fragile infants who are often too small for conventional pacemakers.
Unlike traditional pacemakers that rely on batteries and wires (leads), this new device is powered externally through a wireless system that uses light and electromagnetic energy. This eliminates the risk of infection and mechanical failure associated with leads, making the pacemaker safer and more reliable for temporary cardiac pacing.
“This technology could be a game-changer for newborns in need of pacing support, particularly those undergoing complex heart surgeries shortly after birth,” said Dr. John A. Rogers, the bioengineer leading the development team. “The ability to avoid open-heart surgery for implantation is a huge leap forward.”
The device is designed for short-term use and could provide lifesaving support during the critical early days or weeks after surgery when the heart’s rhythm needs temporary regulation.
Clinical trials and further testing are expected before the pacemaker becomes widely available in neonatal intensive care units around the world.
