What is the immediate action to take after delivering a shock with an AED?

The immediate action to take after delivering a shock with an AED is to immediately resume CPR. This is crucial because, although the shock is intended to restore a normal heart rhythm, the person may still be in cardiac arrest. By starting CPR right away, you maintain blood flow to vital organs, which increases the chances of survival until advanced medical help arrives.

CPR should be performed for about two minutes before the next analysis by the AED, as it helps to keep the heart and brain supplied with oxygenated blood. This continuous cycle of delivering shocks and performing CPR is essential for maximizing the effectiveness of the AED and enhancing the patient's chances of recovery.

The other options, while important in the overall emergency response, do not serve as the immediate next steps following the delivery of a shock. For instance, waiting for the AED to re-analyze or calling for help could unnecessarily delay critical life-saving measures like CPR. Performing a rapid check for responsiveness is also not advisable immediately after a shock, as the priority remains on effective chest compressions to support circulation.