What is the first step in basic life support for an unresponsive adult with suspected cardiac arrest?

What is the first step in basic life support for an unresponsive adult with suspected cardiac arrest?

• A. Check responsiveness, shout for help, call EMS/AED, and begin chest compressions.
• B. Open the airway and begin rescue breaths immediately.
• C. Check responsiveness only and wait for EMS.
• D. Begin chest compressions without calling for help.

Answer: (A)

In this situation, the priority is to act quickly with the steps that keep blood flowing and bring in defibrillation as soon as possible. Start by checking if the person is responsive. If there’s no response, shout for help, activate the emergency system, and get an AED while you prepare to start chest compressions. Begin chest compressions right away if the person isn’t breathing normally. The reason this order matters is that maintaining blood flow to the brain and heart is time-critical; then you can deliver defibrillation as soon as the AED is available. Opening the airway and giving rescue breaths immediately can interrupt chest compressions and delay circulation, and waiting for EMS or other actions before starting compressions wastes crucial minutes. If you’re trained, you can deliver breaths after compressions, but the first and most impactful step is to start compressions and get help and an AED on the scene.

In this situation, the priority is to act quickly with the steps that keep blood flowing and bring in defibrillation as soon as possible. Start by checking if the person is responsive. If there’s no response, shout for help, activate the emergency system, and get an AED while you prepare to start chest compressions. Begin chest compressions right away if the person isn’t breathing normally. The reason this order matters is that maintaining blood flow to the brain and heart is time-critical; then you can deliver defibrillation as soon as the AED is available.

Opening the airway and giving rescue breaths immediately can interrupt chest compressions and delay circulation, and waiting for EMS or other actions before starting compressions wastes crucial minutes. If you’re trained, you can deliver breaths after compressions, but the first and most impactful step is to start compressions and get help and an AED on the scene.