Final answer:
The next step is to check for the child's breathing. If the child is not breathing, start performing CPR immediately. If you have an AED, follow the prompts provided to assess the child's heart rhythm and administer a shock if necessary.
Step-by-step explanation:
The next step is to check for the child's breathing. Lean over the child's face, remove any visible obstructions, and listen for breathing sounds or feel for air movement on your cheek.
If the child is not breathing or is only gasping, you should begin performing CPR immediately. Place the heel of one hand on the center of the child's chest, and place the other hand on top. Interlock your fingers and give 30 chest compressions, pushing down about 2 inches deep. After completing the compressions, give two rescue breaths by covering the child's mouth with your own and giving quick breaths.
If you have an AED with you, now is the time to use it. Turn on the AED and follow the prompts provided. This may involve placing adhesive pads on the child's chest according to the illustrated diagrams and pressing the analyze button to let the AED assess the child's heart rhythm. If a shock is advised, make sure everyone is clear of the child and press the shock button to administer the shock.