Search Result for "ventricular fibrillation":
Wordnet 3.0

NOUN (1)

1. fibrillation of heart muscles resulting in interference with rhythmic contractions of the ventricles and possibly leading to cardiac arrest; 



WordNet (r) 3.0 (2006):

ventricular fibrillation
    n 1: fibrillation of heart muscles resulting in interference
         with rhythmic contractions of the ventricles and possibly
         leading to cardiac arrest