The world's smallest pacemaker has been developed

American scientists have announced the development of the world's smallest pacemaker, which is smaller than a grain of rice and can be injected into the body.

The newly developed wireless pacemaker is just 1 millimeter thick and 3.5 millimeters long, small enough to fit into the tip of a syringe. The device is paired with a soft patch attached to the patient’s chest. When the patch detects irregular heartbeats, it sends light signals to instruct the pacemaker on which rhythm to stimulate.

Scientists have described this wireless pacemaker as a "groundbreaking invention" and plan to test it on humans in the future. The study's author, Professor John Rogers from Northwestern University in the U.S., stated that human trials could begin within 2 to 3 years. This innovative device is expected to inspire further advancements in various fields of medicine.