cardioversion
noun [ U ] medical specialized uk/ˌkɑː.di.əˈvɜː.ʒən/ us/ˌkɑːr.di.oʊˈvɝː.ʒən/
心律转变，心脏复律
a process in which electricity is used to make someone's heart beat regularly again after it has been beating too fast and not regularly. It is done under anaesthetic (= when the person has been given drugs to make them sleep and feel no pain).