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.
A pacemaker is a device that administers electrical energy to the heart to stimulate contraction and regulate its rhythm. Pacemakers may be permanent or temporary (e.g. transcutaneous, transvenous or epicardial wires).The essential components of a pacemaker are: 1  Pulse generator (the power source).nd letter: Chamber sensed â dual chamber (atrial and ventricle). 3rd letter: Pacemaker response to a sensed event â dual response (can trigger or inhibit). Thus a pacemaker functioning in DDD mode can pace either or both the atria and ventricles.