During an ABC assessment, at which stage would you most likely start CPR?

• A. A
• B. B
• C. C
• D. D

Answer: (B)

The key idea is that CPR is started when you reach the stage that assesses circulation. In an ABC assessment you first check Airway, then Breathing, and finally Circulation. CPR for resuscitation targets restoring circulation, so you begin chest compressions (with rescue breaths if applicable) at the point you determine there is no effective circulation or pulse. If a pulse and adequate breathing are present, you do not start CPR and you continue monitoring and supportive care. Some guidelines now emphasize rapid chest compressions, but within the ABC sequence the moment you assess the circulation and find no pulse is when CPR begins.