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Fibrillation

//ˌfɪbɹɪˈleɪʃən// noun

Definitions

Noun
  1. 1
    The rapid, irregular, and unsynchronized contraction of the muscle fibers of the heart. countable, uncountable

    "Though occasionally a “flatliner” can be revived with a defib, it is most commonly used to change the uncoordinated contractions of the heart (fibrillation) into a normal sinus rhythm—that is, to defibrillate the heart."

  2. 2
    act or process of forming fibrils wordnet
  3. 3
    muscular twitching involving individual muscle fibers acting without coordination wordnet

Etymology

From fibrilla + -ation.

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