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.
Lifting After Pacemaker Installation. During the first one to three months after the installation of the pacemaker, you should limit use of your arms where the pacemaker was placed and avoid any activities that involve heavy pushing, pulling or raising of the arms above your shoulders, at least until you are told otherwise by your cardiologist.