Final answer:
Ventricular fibrillation is an irregular heart rhythm that is a medical emergency and requires immediate treatment. It can lead to brain death if not treated promptly. Defibrillation is the most common treatment for ventricular fibrillation.
Step-by-step explanation:
Ventricular fibrillation is an irregular heart rhythm that occurs when the electrical activity of the heart is severely disrupted. In this condition, the heart beats in a wild and uncontrolled manner, preventing it from effectively pumping blood. Ventricular fibrillation is a medical emergency that requires immediate life support. If not treated promptly, it can lead to brain death. The most common treatment for ventricular fibrillation is defibrillation, which uses special paddles to deliver an electrical shock to the heart in an attempt to establish a normal sinus rhythm.