Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun An ectopic heartbeat that originates in the ventricles of the heart and sometimes produces accompanying palpitations.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun irregularity of cardiac rhythm; recurrent occurrences can be a precursor of ventricular fibrillation
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