from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An often fatal form of arrhythmia characterized by rapid, irregular fibrillar twitching of the ventricles of the heart in place of normal contractions, resulting in a loss of pulse.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Condition where the cardiac muscle is contracted irregularly and rapidly.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. fibrillation of heart muscles resulting in interference with rhythmic contractions of the ventricles and possibly leading to cardiac arrest
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