In CPR, what is the recommended rate of chest compressions per minute?

• A. 60-80 per minute
• B. 100-120 per minute
• C. 80-100 per minute
• D. 120-140 per minute

Answer: (B)

Optimal chest compression rate during CPR is about 100 to 120 compressions per minute. This range strikes a balance between delivering enough compressions to maintain blood flow and allowing enough time for the heart to fill between compressions. If the rate is too slow, perfusion to the heart and brain drops, reducing the chances of survival. If the rate is too fast, compressions can become shallow and chest recoil may be incomplete, decreasing effectiveness. The guideline of 100–120 per minute translates to roughly 1.7 to 2 compressions per second, or about one compression every half a second at the higher end, ensuring both adequate blood flow and proper chest recoil.