Lidwell and Edgar H. Booth invented the first pacemaker. It was a portable device consisting of two prongs, one of which included a needle that was immersed in a heart chamber. It was very crude, but managed to resuscitate a stillborn baby in a Sydney hospital in 1928. Over the following decades, inventors invented increasingly sophisticated versions of the pacemaker. However, these devices; which relied on vacuum tubes; they remained heavy and cumbersome, offering little to no mobility to patients. Colombian electrical engineer Jorge Reynolds Pombo developed a pacemaker in 1958 that weighed 49 kg and was powered by a 12-volt car battery. Surgeons at the Karolinska Institute in Sweden were the first to insert a fully implantable device into a patient in 1958. Rune Elmqvist and surgeon Ake Senning invented this pacemaker, which was implanted in Arne Larsson's chest. The first device failed after three hours, the second after two days. Larsson would have been implanted with 26 different pacemakers. He died at age 86 in 2001, outliving both Elmqvist and Senning. There are many heart attacks in the world and as people grow they may have heart abnormalities (Medlineplus). When someone's heart stops working, it can be repaired with a pacemaker, which makes the heart beat properly. The artificial pacemaker is a marvel of modern science. A small implantable device that regulates the human heartbeat through electrical impulses has saved millions of lives. The development of this vital medical device owes much to advances in electronics and communications ushered in by the space age. Pacemakers can be used for people who have heart problems that cause the heart to beat too slowly. A slow heartbeat is called bradycardia, two common problems that cause a slow heartbeat are sinoatrial node disease and heart block. When your heart