American Heart Association First Aid Practice Test 2026 - Free First Aid Practice Questions and Study Guide

Chest compressions for adult victims should be delivered at a depth of at least 2 inches (5 cm). This depth is critical for effectively generating sufficient pressure to circulate blood during cardiopulmonary resuscitation (CPR). The aim is to create enough compression to enhance blood flow to vital organs, especially the heart and brain, while also allowing for proper recoil of the chest after each compression.

Compressions that fall below this depth may not adequately support circulation, which is essential during cardiac arrest situations. Moreover, compressions should be performed at a rate of 100 to 120 compressions per minute to maximize their effectiveness. Adhering to the recommended depth ensures that the rescuer is providing adequate support for the patient's circulation and potentially influencing the outcome positively until advanced medical help can take over.