What is indicated by a "recoil" in CPR?

A "recoil" in CPR refers to the necessary release of pressure on the chest after each compression. This recoil is crucial because it allows the heart to refill with blood between compressions, promoting effective circulation. When compressions are applied, blood is pushed out of the heart and into the circulation; once the pressure is released, the heart can refill with blood, preparing for the next compression.

Achieving complete chest recoil is vital for effective CPR, as it ensures that each compression is followed by an appropriate filling of the heart. Without adequate recoil, the effectiveness of the compressions diminishes, and the overall goal of maintaining circulation during cardiac arrest is compromised.

The other options indicate misunderstandings of the CPR technique and its physiological effects, but understanding the importance of complete chest recoil directly correlates with maintaining adequate blood flow and overall effectiveness during resuscitation efforts.