00:00This is the world's smallest pacemaker, next to a grain of rice, and now next to a normal pacemaker.
00:06That big thing is typically inserted into your body during surgery to regulate your heart rhythm
00:10by using electrical signals that stimulate your heart muscles to contract.
00:13And it might have wires that need to come out of your body.
00:15But this pacemaker is so tiny it can fit on the tip of a syringe.
00:19The goal is a non-invasive way to help babies born with heart defects.
00:23It works like a battery, using electrolytes in the body's fluid to convert chemical energy into electrical pulses.
00:28And it's controlled by this tiny wearable light that sends infrared pulses through the skin at the rate that the heart should beat.
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