Which group of signs indicates that a casualty has suffered a cardiac arrest?

In a cardiac arrest, the body experiences a significant lack of blood flow due to the heart stopping effectively. The signs that indicate this life-threatening condition include a grey pallor of the skin, which reflects poor oxygenation and indicates that the person is not receiving the blood flow necessary to maintain a healthy appearance.

The absence of a pulse confirms that the heart is not pumping blood, which is a definitive indicator of cardiac arrest. Additionally, the lack of chest movements suggests that the individual is not breathing, further supporting the diagnosis of cardiac arrest. Collectively, these signs demonstrate that the body's vital functions have been compromised, necessitating immediate emergency intervention.

Understanding these signs is crucial for effective first response and the initiation of resuscitation efforts, which can significantly improve the chances of survival for an individual experiencing a cardiac arrest.