Final answer:
After resuming CPR and when an AED has advised no shock, the next step is establishing IV or IO access to provide emergency medications as guided by ACLS protocols.
Step-by-step explanation:
Upon arriving on the scene with the code team to find CPR in progress and after an AED has previously advised "no shock indicated" and a subsequent rhythm check shows asystole, the next action after resuming compressions typically involves establishing IV or IO access. This allows the code team to administer emergency medications according to Advanced Cardiac Life Support (ACLS) protocols. Actions such as a pulse check, inserting a laryngeal airway, or performing endotracheal intubation may follow according to the resuscitation algorithm and the team's assessment of the patient's airway and breathing.