Pacemaker are used to treat heart arrhythmias, a pacemaker is a small, battery-operated device that counteracts slow heart rates. The device monitors the heart rate and can send small, electrical impulses to increase the heart rate if it senses that a heart rate is too low.

Pacemakers are metal devices that are placed in the upper chest area with lead wires going to the heart. They are about the size of a pocket watch and can usually be implanted on an outpatient basis using local anesthesia.