What does 'No Shock Advised' on an AED indicate?

• A. No defibrillation shocks should be delivered at that time
• B. Defibrillation should be attempted immediately
• C. The AED should be rechecked with monitor
• D. The patient is alive

Answer: (A)

No Shock Advised means the AED has analyzed the heart rhythm and determined it is not a rhythm that benefits from defibrillation. The rhythm is non-shockable (such as asystole or pulseless electrical activity), so no shock should be delivered. Instead, continue high‑quality CPR and reanalyze after a CPR cycle, since the rhythm can change and a shock may become indicated if a shockable rhythm develops. This message does not imply the patient is alive or that a monitor check is required in that moment; it simply instructs to withhold defibrillation and keep providing care until the next rhythm assessment.