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ventricular fibrillation

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noun
  1. Pathology. a cardiac arrhythmia characterized by rapid, chaotic electrical impulses to the ventricles, incomplete ventricular contractions, and resultant loss of pulse and blood pressure.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

ventricular fibrillation in Medicine

ventricular fibrillation

n.
  1. An often fatal form of arrhythmia characterized by rapid, irregular fibrillar twitching of the ventricles of the heart instead of normal contractions, resulting in a loss of pulse.v-fib
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.