How often should an AED be re-evaluated for rhythm checks during an arrest?

The correct response indicates that an AED should be re-evaluated for rhythm checks after every 2 minutes of CPR and compressions. This timing is consistent with current resuscitation guidelines, which recommend that rhythm checks are performed periodically to assess if defibrillation is necessary.

After approximately 2 minutes of high-quality CPR, the heart rhythm can be re-evaluated using the AED. This allows for a timely assessment while ensuring that sufficient CPR is being delivered to maintain blood flow and oxygenation to vital organs. The 2-minute interval corresponds with the recommendation to minimize interruptions in compressions, which are crucial for improving the chances of successful resuscitation.

In contrast, rhythm checks performed too frequently can disrupt CPR and reduce its effectiveness. Timing checks after 30 seconds or every minute may lead to unnecessary interruptions, which could compromise patient outcomes. Following the completion of every cycle, as suggested in another option, may not align with the critical need to maintain a consistent compression rhythm. Therefore, the 2-minute guideline balances the need for effective CPR with the necessity of rhythm assessment.