Which action between chest compressions is essential to maximize effectiveness?

• A. administer a breath
• B. allow full chest recoil
• C. check for a pulse
• D. remove hands from chest

Answer: (D)

Allowing full chest recoil between compressions is what maximizes effectiveness. When you compress the chest, you push blood out of the heart; letting the chest fully rebound returns it to its normal size, creating negative pressure that pulls blood back into the heart. This recoil is essential for filling the heart so the next compression can push a good amount of blood out again. If you don’t recoil completely or you keep your hands on the chest, blood flow to vital organs drops because the heart doesn’t fill adequately. Removing your hands would stop compressions entirely and disrupt the cycle. Breaths between compressions can be part of some protocols, but they don’t by themselves maximize the effectiveness of the chest compressions.