World’s Smallest Pacemaker is Tinier Than a Grain of Rice

 

April 2, 2025

Scientists have developed an ultra-miniature pacemaker that is smaller than a grain of rice, marking a significant breakthrough in cardiac technology. The innovative device, measuring just 1.8 mm in width and 3.5 mm in length, is capable of delivering electrical impulses comparable to standard pacemakers.

What sets this new pacemaker apart is not just its size but also its biodegradable material. Unlike traditional pacemakers that require surgical removal after a certain period, this new device dissolves safely in the body over time, eliminating the need for follow-up surgeries and reducing post-operative complications.

This development builds upon previous advancements in leadless pacemaker technology, such as the Micra device, which is about an inch long and significantly smaller than conventional pacemakers. The Micra is implanted directly into the right ventricle of the heart via a minimally invasive procedure, eliminating the need for chest incisions and leads. The newly unveiled rice-sized pacemaker further miniaturizes this technology, providing an even less invasive option for patients in need of cardiac rhythm management.

Medical experts believe that this latest innovation could revolutionize the treatment of heart conditions, particularly for patients requiring temporary pacing support. The dissolvable nature of the device is especially beneficial for post-surgical and critically ill patients, offering an efficient, low-risk solution.

Researchers are optimistic about the future of such ultra-small bioresorbable medical devices. As clinical trials progress, this groundbreaking technology could soon be implemented in hospitals worldwide, offering a safer, more efficient alternative for patients in need of cardiac support.