How often should CPR be reassessed?

The frequency of reassessing CPR is crucial in ensuring effective intervention in a cardiac emergency. Reassessing every 2 minutes allows the rescuer to evaluate the effectiveness of the chest compressions and ventilation being provided. This interval aligns with established guidelines, which suggest that after every 2 minutes of CPR, healthcare providers should check for signs of life, reassess the pulse, and determine the need for ongoing chest compressions or adjustments based on the patient's condition.

This approach enables the rescuer to respond appropriately to any changes in the patient's state, ensuring timely adjustments can be made in the resuscitation efforts. The other options, while they might seem reasonable, do not adhere to the best practices recommended for effective CPR management. Waiting longer than 2 minutes could result in missed opportunities for timely intervention.