Sometimes a patient's heart does not beat like it is supposed to and causes a patient to become dizzy, get tired easily or pass out. This is due to disease of the electrical properties of the heart. A permanent pacemaker is a small device that helps the heart to beat regularly and eliminate those symptoms. The pacemaker is implanted underneath the skin in the upper chest area usually on the left side. An electrode is passed into the venous side of the heart and attached to the pacemaker. Together they sense when the heart is not beating correctly and correct the beat.