The Heart pacemaker By maddiedk9812 Jan 27, 1949 John A. Hopps invents the first heart pacemaker Sep 27, 1950 Introduce the heart pacemaker to the world Jan 1, 1960 The pacemaker remains the same Dec 1, 1970 The first nuclear powered pacemaker is discovered Dec 1, 1980 Heart pacemaker decreases in size Dec 1, 1990 1990-2012 Gets smaller and easier to put in
