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QueenJahaida
The most common cause of cardiac arrest is an arrhythmia called ventricular fibrillation — when rapid, erratic electrical impulses cause your ventricles to quiver uselessly instead of pumping blood.
BooksAndCoffee
No, that is a heart attack that is caused by a rupture or blockage within an artery of the heart.

Cardiac arrest is caused by an electrical malfunction in the heart which causes an irregular heartbeat which is also known as arrhythmia.