When performing CPR while waiting for trained rescue personnel, how quickly should chest compressions be delivered?

• A. 10 a minute
• B. 25 a minute
• C. 100 a minute
• D. 50 a minute

Answer: (C)

During CPR, the goal is to keep blood moving to vital organs, so compressions must be delivered at a steady, brisk pace. The recommended rate is about 100 compressions per minute, roughly one compression per second. This tempo maximizes perfusion while allowing the chest to recoil fully between compressions. Slower rates reduce blood flow, while compressions that are too fast can compromise depth and recoil, making them less effective. Aim for around 100 per minute (some guidance allows up to 120 per minute).