Final answer:
The primary intervention for managing hypotension after ROSC is to administer a bolus of crystalloid fluid to increase blood volume and stabilize blood pressure.
Step-by-step explanation:
The recommended initial intervention for managing hypotension in the immediate period after return of spontaneous circulation (ROSC) would typically be to administer a bolus of crystalloid fluid. This action helps to increase blood volume and can stabilize blood pressure quickly. If hypotension persists, additional interventions such as starting vasoactive medications, initiating therapeutic hypothermia, or performing immediate coronary angiography may be considered depending on the underlying cause of the cardiac arrest and the patient’s condition. However, the immediate response to hypotension post-ROSC is usually fluid resuscitation with crystalloids.