Fibrillation meaning

fĭb'rə-lā'shən, fī'brə-
The forming of fibers.
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Fine, rapid twitching of individual muscle fibers with little or no movement of the muscle as a whole.
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Rapid uncoordinated twitching movements that replace the normal rhythmic contraction of the heart and may cause a lack of circulation and pulse.
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A rapid, uncoordinated series of contractions of a muscle; esp., such contractions of some portion of the heart muscle, causing irregular heartbeats and sometimes ineffectual pumping of blood.
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The forming of fibers.
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Fine, rapid twitching of individual muscle fibers with little or no movement of the muscle as a whole.
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Rapid uncoordinated twitching movements that replace the normal rhythmic contraction of the heart and may cause a lack of circulation and pulse.
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A rapid twitching of muscle fibers, as of the heart, that is caused by the abnormal discharge of electrical nerve impulses. Ventricular fibrillation is life-threatening.
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The rapid, irregular, and unsynchronized contraction of the muscle fibers of the heart.
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Origin of fibrillation

From New Latin fibrilla, diminutive of Latin fibra, "fiber," in reference to the muscle strands of the heart.