A pacemaker is a small electronic device that helps the heart to beat at a proper rate. It keeps track of your normal heartbeat, and can sense when it becomes too slow. When that happens, the pacemaker generates a small electrical impulse, very similar to the heart’s natural impulse. This keeps your heart beating at a normal pace.
Your pacemaker has two main parts: the generator and the lead(s). The generator is a small, flat, lightweight metal case that contains a tiny computer and battery. This is the part that generates the electrical impulses. The leads are wires covered by soft, flexible plastic. Working together to regulate your heart, they monitor how well the heart is beating and will send electrical impulses from the generator to the heart when it senses it is necessary.