The side lengths of a right triangle form a so-called Pythagorean triple. A triangle that is not a right triangle is sometimes called an oblique triangle. Special cases of the right triangle include the isosceles right triangle (middle figure) and 30-60-90 triangle (right figure).
The first pacemaker was implanted on 8th October 1958 in a 43 year old man called Arne Larsson with complete heart block and Stokes-Adams attacks. Technological innovations between 1973 and 1980 rendered obsolete the reliable pacemaker of 1970.
Senning used the device that was invented by the Sweden inventor Rune Elmqvist (1906â1996). Arne Larsson was the first patient that used the pacemaker. In the year 1971, Wilson Greatbatch (1919-2011) the American engineer made a breakthrough in the industry of pacemakers by using lithium anode cells which he invented.n the year 1932, Albert Hyman (1893-1972) the American cardiologist invented a device that was using a spring-wound motor that works by hand. Hyman was the first to use the term artificial pacemaker.