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Pacemakers prevent or eliminate problems individuals experience with the pace of their heartbeats. These small electronic devices are implanted under the skin to help regulate heart rhythms and treat symptoms that result from bradycardia or slow heart rate. It is up to the person with the pacemaker to ensure their implanted device is checked regularly, follow the doctor's orders, and heed a few precautions. Batteries in pacemakers typically do not get low until after 7 to 10 years. At that time, doctors can perform a procedure to replace the generator.

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1. How Do Pacemakers Work?

Pacemakers are not a substitute for the work the heart performs in the body; they simply help it regulate the timing and sequence of the heartbeat. The pacemaker is made up of a generator, a tiny computer with a battery and other electronic parts, and a lead -- a flexible, insulated wire that sends an electronic signal between the pacemaker and your heart. The surgeon places the pacemaker under the skin beneath the collarbone and threads the leads through a nearby vein to the heart. The other ends of the leads are plugged into the generator, which enables easy monitoring and programming.

bdspn / Getty Images

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This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other health-care professional.