Meaning of “open-heart surgery” in the English Dictionary

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"open-heart surgery" in American English

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open-heart surgerynoun [ C/U ]

us /ˈoʊ·pənˈhɑrt ˌsɜr·sʒɜr·i/

a medical operation in which the heart is repaired while the body’s blood is kept flowing by a machine

(Definition of “open-heart surgery” from the Cambridge Academic Content Dictionary © Cambridge University Press)