Defining BRUE and how it differs from ALTE

BRUE, Brief Resolved Unexplained Events, are a common and anxiety-provoking condition that presents to the Emergency Department. In this episode we explore the definition of BRUE, contrast it with ALTE, and walk through evidence-based approaches to risk stratification. We’ll explore the original AAP framework and two subsequent prediction models to see where the recommendations stand today. This is a classic example of scary event / well child that you will see in the Emergency Department.

Learning Objectives

By the end of this episode, you will be able to:

1. Define BRUE and contrast it with the older concept of ALTE.

2. Recognize evolving risk stratification criteria

3. Apply evidence-based strategies for evaluation and counseling of infants with BRUE, including safe discharge decisions and the role of home monitoring.

References

1. Tieder JS, Bonkowsky JL, Etzel RA, et al. Brief resolved unexplained events (formerly apparent life-threatening events) and evaluation of lower-risk infants: Executive summary. Pediatrics. 2016;137(5):e20160591. doi:10.1542/peds.2016-0591

2. Carroll AE, Bonkowsky JL. Acute events in infancy including brief resolved unexplained event (BRUE). In: McMillan JA, ed. UpToDate. Waltham, MA: UpToDate Inc. https://www.uptodate.com (Accessed October 2025).

3. Carroll AE, Bonkowsky JL. Use of home cardiorespiratory monitors in infants. In: McMillan JA, ed. UpToDate. Waltham, MA: UpToDate Inc. https://www.uptodate.com (Accessed October 2025).

4. Carroll AE, Bonkowsky JL. Sudden infant death syndrome: Risk factors and risk reduction strategies. In: McMillan JA, ed. UpToDate. Waltham, MA: UpToDate Inc. https://www.uptodate.com (Accessed October 2025).

5. Carroll AE. Patient education: Brief resolved unexplained event (BRUE) in babies (The Basics). In: UpToDate. Waltham, MA: UpToDate Inc. https://www.uptodate.com (Accessed October 2025).

6. Nama N, Neuman MI, Finkel MA, et al. Risk prediction after a brief resolved unexplained event. JAMA Pediatr. 2023;177(12):1263–1272. doi:10.1001/jamapediatrics.2023.4197

7. Nama N, Neuman MI, Finkel MA, et al. External validation of brief resolved unexplained events prediction rules for serious underlying diagnosis. JAMA Pediatr. 2024;178(4):398–407. doi:10.1001/jamapediatrics.2024.0114