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Source: National Heart Lung and Blood Institute, U.S. Department of Health and Human Services, National Institute of Health. www.
A pacemaker consists of a battery, a computerized generator, and wires with electrodes on one end. The battery powers the generator, and a thin metal box surrounds both it and the generator. The wires connect the generator to the heart.
LifeART Collection Images Copyright © 1989-2001 by Lippincott Williams & Wilkins, Baltimore, MD
Right Atrium
Right Ventricle
contains the battery and the information to control the heartbeat. The battery can last about 7 to 8 years.
Pacemaker Leads:
wires used to connect the heart to the generator and send the electrical impulses to the heart to tell it to beat.
Stimulation of heart muscle
Two main types of programming
for pacemakers
Demand Pacing:
monitors your heart rhythm. It only electrically stimulates your heart if it’s beating too slow or if it misses a beat.
Rate-Responsive Pacemaker:
speed up or slow down your heart rate depending on how active you are. To do this, the rate-responsive pacemaker monitors your sinus node rate, breathing, blood temperature, or other factors to determine your activity level. Most people who need a pacemaker to continually set the pace of their heartbeat have rate-responsive pacemakers.

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