defibrillation

noun

de·​fi·​bril·​la·​tion (ˌ)dē-ˌfib-rə-ˈlā-shən  -ˌfīb- 

: restoration (as by an electric shock) of the rhythm of a fibrillating heart

defibrillate

(ˈ)dē-ˈfib-rə-ˌlāt  -ˈfīb- 

transitive verb

defibrillated; defibrillating