Transforming Heart Health: Meet The World’s Smallest Pacemaker Powered By Light

Researchers at Northwestern University in the US have created an exceptionally small pacemaker that can be injected into the body using a syringe. This innovative device is particularly beneficial for newborns with congenital heart defects, as it suits hearts of all sizes. The pacemaker, smaller than a rice grain, works with a flexible, wireless wearable device on the chest to manage heart pacing.

The wearable component detects irregular heartbeats and sends light pulses to activate the pacemaker through the skin and muscles. This technology is designed for temporary use and dissolves naturally after its purpose is fulfilled, eliminating the need for surgical removal. All components are biocompatible, ensuring they safely dissolve into body fluids.

John A. Rogers, a bioelectronics expert from Northwestern, stated, "We have developed what is, to our knowledge, the world’s smallest pacemaker." He highlighted the importance of miniaturisation in pediatric heart surgeries where temporary pacemakers are crucial. Igor Efimov, an experimental cardiologist at Northwestern who co-led the study, emphasised their primary focus was children.

Efimov explained that about 1% of children worldwide are born with congenital heart defects. These children typically require temporary pacing post-surgery for around seven days until their hearts self-repair. The new pacemaker can be placed on a child’s heart and controlled by a gentle wearable device without needing further surgery for removal.

The tiny pacemaker's size allows it to be used alongside various implantable devices. Rogers mentioned that they demonstrated how these devices could integrate with transcatheter aortic valve replacements. The pacemakers can be activated during recovery to address complications, enhancing traditional implants by providing additional stimulation.

Efimov noted that multiple small pacemakers could be deployed on the heart's exterior to improve synchronised care. They could also be incorporated into other medical devices like heart valve replacements that might cause heart block.

This technology's adaptability presents numerous possibilities in bioelectronic medicine beyond cardiac applications. It could aid in nerve and bone healing, wound treatment, and pain management. Such versatility highlights its potential impact across various medical fields.

The development of this tiny pacemaker marks significant progress in medical technology. Its ability to provide temporary pacing without invasive procedures offers hope for improved outcomes in pediatric cardiac care and beyond.

With inputs from WAM