A pacemaker is a small device with one or two wires (called leads). It’s placed in the chest, and the leads are connected to the heart to help keep heart rate normal. Once it’s connected, the pacemaker will look at every heart beat and keep the heart beating if your rate is too slow or too irregular, which are signs of arrhythmia
. If your heart is beating too fast, the pacemaker can give your doctor information so you can be treated. With the pacemaker in place, you’ll get relief from symptoms of abnormal heart rate, such as tiredness and fainting.