open-heart surgery: Meaning and Definition of

o'pen-heart' sur"gery

Pronunciation: (ō'pun-härt'), [key]
  1. surgery performed on the exposed heart while a heart-lung machine pumps and oxygenates the blood and diverts it from the heart.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.