Which of the following best describes high-quality CPR elements?

• A. Rate 80-100/min, depth 1-2 inches
• B. Rate 60-80/min, depth 2 inches
• C. Rate 100-120/min, depth at least 2 inches, full chest recoil, minimal interruptions
• D. Rate 120-140/min, depth 3-4 inches, no recoil

Answer: (C)

High-quality CPR relies on delivering chest compressions with the right rate, sufficient depth, full chest recoil, and minimal interruptions to keep blood flowing to the heart and brain. The best description matches a rate of 100 to 120 compressions per minute, a depth of at least 2 inches (about 5 cm) for adults, complete chest recoil between compressions, and only brief interruptions. This combination optimizes perfusion: the correct rate keeps blood moving without sacrificing the opportunity for the heart to fill, the depth provides enough force to generate forward blood flow, full recoil allows venous return to the heart, and minimizing pauses preserves coronary and cerebral perfusion pressure.

Other options fall short because they mix too shallow or too slow a delivery, or impose too deep a compression with no recoil, which can cause injury and reduce the effectiveness of perfusion. One alternative has a shallow depth with a slower rate, which underdelivers blood flow. Another uses a slower rate with adequate depth, still risking insufficient perfusion. The last suggests an overly fast rate with very deep compressions and no recoil, which disrupts venous return and increases injury risk.