'cardiac arrest' definitions:

Definition of 'cardiac arrest'

(from WordNet)
noun
Absence of systole; failure of the ventricles of the heart to contract (usually caused by ventricular fibrillation) with consequent absence of the heart beat leading to oxygen lack and eventually to death [syn: asystole, cardiac arrest, cardiopulmonary arrest]

Synonyms of 'cardiac arrest'

From: Moby Thesaurus