Which of these indicates that CPR is effective?

The effectiveness of CPR can be assessed by observing specific physiological responses. When the chest rises and falls with each breath, it indicates that ventilation is occurring properly—that is, air is moving into the lungs. This movement suggests that the rescuer is providing effective rescue breaths and supporting the victim's respiratory needs.

Effective CPR aims not only to circulate blood but also to ensure that oxygen is being delivered to vital organs. The rise and fall of the chest is a visual indicator that this is happening, which is why it is a key sign of CPR effectiveness.

In contrast, the presence of a faint pulse can indicate some level of circulation, but it's not a definitive sign that CPR is being performed effectively at that moment, as it could indicate other underlying issues. Unresponsiveness of the victim is expected during cardiac arrest and does not itself indicate effective CPR. Similarly, while a victim showing no signs of discomfort may suggest that they are stable, it does not provide direct evidence of adequate circulation or ventilation. Therefore, observing chest rise and fall is a clear and critical indicator of effective CPR in progress.