Final answer:
Cardiac arrest is a medical emergency in which the heart stops pumping blood or pumps blood poorly. Two indicators of cardiac arrest are unresponsiveness and not breathing or only gasping.
Step-by-step explanation:
Cardiac arrest is a medical emergency in which the heart stops pumping blood or pumps blood poorly. Two indicators of cardiac arrest are a person being unresponsive and not breathing or only gasping. These symptoms suggest that vital organs are not receiving adequate blood flow. Other symptoms, like headaches, chest pain, and trouble breathing, may indicate other medical conditions but are not specific to cardiac arrest.