Final answer:
In this scenario, the next intervention should be to continue CPR and provide additional doses of epinephrine every 3-5 minutes according to the American Heart Association guidelines for pediatric advanced life support (PALS).
Step-by-step explanation:
In this scenario, the 7-year-old boy is unresponsive, apneic, and pulseless. CPR has been initiated, he has been intubated, and an initial dose of epinephrine has been given.
The next intervention should be to continue CPR and provide additional doses of epinephrine every 3-5 minutes according to the American Heart Association guidelines for pediatric advanced life support (PALS).
It is important to maintain high-quality chest compressions and ensure proper ventilation with the intubation.
CPR should be continued until the boy regains spontaneous circulation or is declared dead by a healthcare professional.