Artificial pacemaker

This article is about a medical device which electrically stimulates the heart. For a similar device that stimulates the brain, see brain pacemaker.

Basic pacemaker function

Modern pacemakers all have two functions. They listen to the heart's native electrical rhythm, and if the device doesn't sense any electrical activity within a certain time period, the device will stimulate the heart with a set amount of energy, measured in joules.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~