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open-heart surgery

[oh-puh n-hahrt] /ˈoʊ pənˈhɑrt/
surgery performed on the exposed heart while a heart-lung machine pumps and oxygenates the blood and diverts it from the heart.
Origin of open-heart surgery
First recorded in 1975-80 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for open-heart surgery

open-heart surgery

surgical repair of the heart during which the blood circulation is often maintained mechanically
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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open-heart surgery in Science
open-heart surgery  
Surgery in which the thoracic cavity is opened to expose the heart and the blood is recirculated and oxygenated by a heart-lung machine.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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