Final answer:
The chance of survival decreases rapidly with each minute of defibrillation delay in patients with VF who do not receive bystander CPR.
Step-by-step explanation:
Ventricular fibrillation (VF) is a medical emergency that requires immediate intervention to save a patient's life. The most common treatment for VF is defibrillation, which involves delivering a strong electrical shock to the heart. The chance of survival decreases rapidly with each minute of defibrillation delay in patients with VF who do not receive bystander CPR.
For example, if defibrillation is delayed by just 2 minutes, the chance of survival decreases by about 10-15%. If the delay reaches 10 minutes, the chance of survival drops to less than 5%. This is why it is crucial to start defibrillation as soon as possible during VF cases.