verb (used with object), de·fi·bril·lat·ed, de·fi·bril·lat·ing. Medicine/Medical.
- to arrest the fibrillation of (heart muscle) by applying electric shock across the chest, thus depolarizing the heart cells and allowing normal rhythm to return.
- med the application of an electric current to the heart to restore normal rhythmic contractions after the onset of atrial or ventricular fibrillation
1940, in reference to heartbeat, from de- + fibrillation “a beating in an abnormal way,” from Modern Latin fibrilla, diminutive of fibra “fiber,” in reference to the muscle strands of the heart that contract irregularly in this condition.
- The stopping of fibrillation of the heart muscle and the restoration of normal contractions using drugs or electric shock.
- Termination of fibrillation of the heart muscle and restoration of normal heart rhythm, especially by one or more electric shocks administered by paddles applied to the chest.