[Ventricular fibrillation] is a heart rhythm problem that occurs when the heart beats with rapid, erratic electrical impulses. This causes pumping chambers in your heart (the ventricles) to [quiver] uselessly, instead of pumping blood. The remedy of this is Cardiopulmonary Resuscitation ([CPR], which is 30 chest pumps, 2 breaths, defibrillation, adrenaline, repeat)

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