Early CPR can ____ the survival rate from a witnessed sudden cardiac arrest?

• A. Halve
• B. Double or triple
• C. Increase by 10%
• D. No effect

Answer: (B)

Starting CPR early keeps blood flowing to the brain and heart when the heart has stopped. In a witnessed sudden cardiac arrest, a bystander who begins compressions right away buys critical time before defibrillation and advanced care arrive. This immediate action markedly improves outcomes, typically doubling or even tripling the chances of survival compared with not providing CPR before defibrillation. The benefit comes from preserving brain function and maintaining some blood flow to the heart, reducing the damage from a period of no circulation. High-quality, continuous chest compressions with minimal interruptions are key, and delivering a shock as soon as an AED is available further optimizes the chance of a good recovery.