A medical device that generates electrical impulses delivered by electrodes to cause the heart muscle chambers (the upper, or atria and/or the lower, or ventricles) to contract and therefore pump blood; by doing so this device replaces and/or regulates the function of the electrical conduction system of the heart. Pacer designed by Anthony J. Adducci and Arthur Schwalm.
<a href="//commons.wikimedia.org/wiki/User:Xacto" title="User:Xacto">Brian Adducci</a> <a href="//commons.wikimedia.org/wiki/File:Cardiac_pacer_with_sold-state_power_source.jpg#P170" title="Edit this at Structured Data on Commons"><img alt="Edit this at Structured Data on Commons" src="https://upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" style="vertical-align: text-top" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20"></a>
Pacemaker photo: own. Illustration: The website of the United States Patent and Trademark Office states that "the text and drawings of a patent are typically not subject to copyright restrictions," and similar views have been published by patent attorneys.