As consumer technology has trended smaller and thinner, medical devices have done the same. And now, the first transcatheter pacemaker has been approved for use with heart patients in the US. Medtronic gained FDA approval for its Micra TPS pacemaker, the first device to employ the miniaturized pacing tech to be approved by the US government. The company is calling the device the "world's smallest pacemaker," measuring just a tenth of the size of traditional technology. It's about the size of large vitamin.