What should be done if a patient is unresponsive and has no pulse?

When a patient is unresponsive and has no pulse, the immediate priority is to begin CPR, as this is critical for maintaining blood circulation and oxygenation to vital organs. Starting CPR right away provides essential chest compressions, which can help preserve brain function and increase the chances of survival until advanced medical help arrives.

Time is of the essence in cardiac emergencies; therefore, the protocol emphasizes initiating CPR promptly rather than delaying for other actions. While calling for additional help, administering oxygen therapy, or checking for other vital signs are important actions in patient care, they should occur after initiating CPR. Ensuring circulation through effective chest compressions takes precedence in a situation where the patient is unresponsive and pulseless, as it directly addresses the life-threatening condition.