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.
It depends on such factors as. 1  How often a given patient uses the pacemaker. 2  How well it is programmed. 3  How good is the connection or electrical interface between the lead and the muscle. 4  What medications the patient is on, since this may play an important role in how often the pacemaker is required to fire, and how much energy it must use. 5  Wheth