Compressions on an adult victim should be performed at what rate and depth?

• A. 60-80 times per minute to a chest depth of 1 inch
• B. 100-120 times per minute to a chest depth of 2 inches
• C. 50-70 times per minute to 2.5 inches
• D. 80-100 times per minute to 1.5 inches

Answer: (B)

Effective adult CPR hinges on delivering compressions at the right pace and depth to generate enough blood flow while allowing full chest recoil. The recommended rate is 100–120 compressions per minute, and the depth should be about 2 inches (5 cm) or slightly more, but not exceeding roughly 2.4 inches (6 cm). This combination maximizes perfusion to the heart and brain without causing excessive injury. Rates slower than this or shallower compressions reduce stroke volume and perfusion, which is why options with slower rates or shallower depths aren’t as effective. The choice that matches these guidelines states 100–120 compressions per minute with about 2 inches of depth.