Definition of open heart in English:

open heart

noun

  • A practically bloodless heart that has been temporarily bypassed and opened for examination or surgery. Usually attributive (frequently in form open-heart), designating or relating to such an operation.

Origin

1950s; earliest use found in Surgery. From open + heart [interjection, adverb].

Pronunciation

open heart

/ˌəʊp(ə)n ˈhɑːt/