Ventricular Fibrillation: Causes, Symptoms, and Emergency Response

The correct answer is Ventricular fibrillation.

Ventricular fibrillation (VF) is a medical condition in which the ventricles of the heart contract in a rapid and chaotic manner. This prevents the ventricles from effectively pumping blood, leading to a sudden cardiac arrest. VF is the most common cause of sudden cardiac death.