1920, Electronic pacemaker
In 1926, Dr Mark Lidwell of the Royal Prince Alfred Hospital of Sydney, supported by physicist Edgar Booth of the University of Sydney, invented the world's first electronic pacemaker. Dr Lidwell was working at Sydney’s Crown Street Women’s Hospital and had a newborn baby patient about to die from heart failure. He connected the child’s heart to electrodes and saved its life by stimulating the heartbeat with electric pulses. He never patented the pacemaker and avoided recognition as he was troubled with ethical concerns about prolonging life unnaturally.