Ventricular fibrillation is a cardiac condition which consists of a lack of coordination of the contraction of the muscle tissue of the large chambers of the heart. The ventricular muscle twitches randomly, rather than contracting in unison, and so the ventricles fail to pump blood into the arteries. Ventricular fibrillation is a medical emergency.
This condition can sometimes be reversed with the use of a defibrillator.
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