Final answer:
The next step after delivering a shock is to resume CPR with chest compressions, as per current CPR guidelines.
Step-by-step explanation:
After delivering a shock with an automated external defibrillator (AED), the next step in caring for a person who has suffered a cardiac arrest is to resume CPR starting with chest compressions. This is in line with current CPR guidelines which emphasize the importance of high-quality chest compressions over artificial respiration. Chest compressions help maintain blood flow to vital organs, such as the brain, until the heart can resume beating on its own or further medical intervention can be applied.