American Heart Association First Aid Practice Test

The correct rate for chest compressions during hands-only CPR is 100-120 compressions per minute because this range has been established as optimal for maintaining blood circulation during a cardiac arrest scenario. Research has shown that compressions within this rate effectively support the flow of oxygenated blood to vital organs, particularly the brain and heart.

Furthermore, compressions at this rate allow responders to manage fatigue while maximizing the quality of CPR, which is crucial for increasing the chances of survival in someone experiencing a cardiac event. Compressions that fall outside this range may be less effective; for instance, too slow a rate could lead to inadequate blood supply, and excessively fast compressions might not allow for complete chest recoil, which also hampers blood flow.

Adhering to this recommended range is vital for all lay rescuers trained in CPR, and it underscores the importance of regular training and refreshers to maintain appropriate skills and knowledge in emergency situations.