Pacemakers are made up of a long-lasting battery and an electronic circuit in a metal case that sits under your skin. The pacemaker is connected to your heart muscle by one or two leads. Having a pacemaker can greatly improve your quality of life and for some people it can be life-saving. A pacemaker can relieve some arrhythmia symptoms, such as fatigue and fainting. A pacemaker may help a person with abnormal heart rhythms to resume a more active lifestyle. There are several types of pacemaker available. Together with your doctor, ask about the options and talk about what may work best for you.