A pacemaker is a small device that helps control your heart rate by:
- Speeding up the heart rate when it is too slow
- Slowing down the heart rate when it is too fast
- Helping the rhythm of the heart beat regularly – this is if you have a pacemaker combined with a defibrillator, also called an ICD
A pacemaker is placed in the chest during surgery. Wires called leads are put into the heart muscle. The device with the battery is placed under your skin, below your shoulder.