<ul><li>Scientists have developed the world's smallest pacemaker, smaller than a grain of rice, which is optically controlled and dissolves in the body after use.</li><li>The pacemaker could be used in human hearts of all sizes, including those of newborn babies with congenital heart defects.</li><li>The tiny pacemaker can be placed on the heart and stimulated with a soft, gentle, wearable device, eliminating the need for additional surgery.</li><li>The dissolvable pacemaker reduces the risks associated with traditional pacemakers and eliminates the need for bulky batteries and wires.</li></ul>

Light-activated pacemaker is smaller than a grain of rice

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