| NOUN | act | open-heart surgery | heart surgery in which the rib cage is spread open, the heart is stopped and blood is detoured through a heart-lung machine while a heart valve or coronary artery is surgically repaired |
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| Meaning | heart surgery in which the rib cage is spread open, the heart is stopped and blood is detoured through a heart-lung machine while a heart valve or coronary artery is surgically repaired. | |
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| Narrower | coronary bypass, coronary bypass surgery, coronary artery bypass graft, CABG | open-heart surgery in which the rib cage is opened and a section of a blood vessel is grafted from the aorta to the coronary artery to bypass the blocked section of the coronary artery and improve the blood supply to the heart |
| Broader | heart surgery | Any surgical procedure involving the heart |
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