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open-heart surgery

US:USA pronunciation: respellingUSA pronunciation: respelling(ō′pən härt′)


WordReference Random House Learner's Dictionary of American English © 2026
ˈo•pen-ˈheart ˌsur•ger•y, n. [countable]
  1. Surgeryan operation performed on the exposed heart with the aid of a special machine to keep the blood circulating.

WordReference Random House Unabridged Dictionary of American English © 2026
o′pen-heart′ sur′gery  (ō′pən härt′),USA pronunciation 
  1. Surgerysurgery performed on the exposed heart while a heart-lung machine pumps and oxygenates the blood and diverts it from the heart.
  • 1975–80

Collins Concise English Dictionary © HarperCollins Publishers::
open-heart surgery n
  1. surgical repair of the heart during which the blood circulation is often maintained mechanically
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