How often do you stop to think about the rate of your heartbeat? Do ever worry that your heart may be beating too fast or too slow? I’m sure that fears of heart problems are not even present in your mind. But for hundreds of millions of people world wide, these fears have been realized, and have had a profound and devastating effect on their lives and the lives of their families. Patients can perhaps consider heart transplant waiting lists or risk open-heart surgery. The majority, however, have no options.

However, in the 1950’s a revolutionary way to treat heart problems was introduced. This was the pacemaker. A pacemaker is a battery-operated device that can replace your natural heart pacemaker. Ultimately

Some topics in this essay:
CENTURY Madam, battery life, treatment heart, hearts beat, invention past century, invention past, power failure, past century,