Final answer:
Immediately after an initial AED shock, the EMS provider should resume performing chest compressions according to CPR guidelines, focusing on high-quality compressions rather than interrupting for pulse or blood pressure checks.
Step-by-step explanation:
Immediately after delivering an initial shock to the patient using an Automated External Defibrillator (AED), the EMS provider should perform compressions. According to current CPR guidelines, high-quality chest compressions are crucial. The provider should compress the chest at least 5 cm deep and at a rate of 100 compressions per minute. Compressions should continue until the patient shows signs of life or is declared dead by a healthcare professional. Checking for pulse and blood pressure should not interrupt the critical process of chest compressions unless directed by specific circumstances or protocols.