William Brinson Orr, MD, FAAP, FACC  worr@wustl.edu

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Assistant Professor of Pediatrics, Cardiology
Associate Director, Pediatric Cardiology Fellowship

phone: (314) 454-6095

Clinical Interests

Reliable, hardworking and self-driven Pediatric Cardiologist. Comfortable with both inpatient and outpatient cardiology patients with an interest in Acute Care Cardiology sports and exercise physiology, and cardiopulmonary exercise testing. Additional focus on clinical education, fellowship training and clinical research. Able to establish strong rapport with all patients. Adept at communicating with patients, relatives, hospital and community physicians and nursing staff.


  • BS, Magna Cum Laude, University of Georgia2009
  • MD, Medical College of Georgia2013


  • Pediatric Resident, Washington University2013 - 2016
  • Pediatric Cardiology Fellow, Washington University2016 - 2019

Licensure and Board Certification

  • 2013 - 2016Mo, Missouri State Board of Healing Arts Medical License (Temporary)
  • 2013 - PresBasic Life Support
  • 2013 - PresPediatric Advanced Life Support
  • 2016 - PresMO, State of Missouri Medical License issued by the Missouri State Board of Registration for the Healing Arts
  • 2016 - PresPediatric Board Certified by the American Board of Pediatrics
  • 2016 - PresBNDD
  • 2017 - PresAdvanced Cardiovascular Life Support
  • 2019 - PresIndividual DEA
  • 2020 - PresMO, Pediatric Cardiology Board Certified by the American Board of Pediatrics
  • 2021 - PresState of Illinois Department of Financial and Professional Regulation Licensed Physician and Surgeon

Honors and Awards

  • Department of Pediatrics 2018 Unsung Heroes Award2018
  • Outstanding Fellow Teaching Award: Department of Pediatrics2019
  • First Place Moderated Poster Presentation Session at the 7th Annual Cincinnati Clinical Exercise Testing and Therapeutics Symposium2020
  • 2021 Academy of Educators Honor Roll Award2021

Recent Publications view all (15)

Publication Co-Authors

  1. Early preclinical experience of a mixed reality ultrasound system with active GUIDance for NEedle-based interventions: The GUIDE study. Cardiovasc Digit Health J. 2022;3(5):232-240. PMCID:PMC9596321  PMID:36310686 
  2. Single-Center Case Series Assessment of Early Exercise Capacity Data among Patients Who Received an Alterra Prestent and SAPIEN 3 Valve Placement CJC Pediatric and Congenital Heart Disease. 2022. doi:https://doi.org/10.1016/j.cjcpc.2022.06.002  
  3. A Single-center Experience Comparing First- Versus Second-generation Insertable Cardiac Monitors in Pediatric Patients. J Innov Card Rhythm Manag. 2022;13(6):5048-5056. PMCID:PMC9221184  PMID:35765585 
  4. EKG Abnormalities in a Youth Athlete Following COVID-19: It's Not Always Myocarditis! Pediatr Cardiol. 2022. PMID:35622085 
  5. Assessment of Applewatch Series 6 Pulse Oximetry and ECG Algorithm in Children PLOS Digital Health. 2022. 
  6. mRNA Coronavirus-19 Vaccine-Associated Myopericarditis in Adolescents: A Survey Study. J Pediatr. 2021. PMCID:PMC8691954  PMID:34952008 
  7. Incorporation of the CardioMEMS™ System During an Exercise Physiology Test in a Pediatric Congenital Heart Disease Patient Contributing to Medical Decision-Making. Pediatr Cardiol. 2021. PMID:34668991 
  8. Comparing patient and family usability of insertable cardiac monitors in a pediatric cohort: Patient external activator versus smartphone transmission. Heart Rhythm O2. 2021;2(2):201-204. PMCID:PMC8183865  PMID:34113922 
  9. A unique cardiovascular presentation of pheochromocytoma. SAGE Open Med Case Rep. 2021;9:2050313X21994037. PMCID:PMC7900786  PMID:33680468 
  10. The Impact of Direct to Consumer Wearables in Pediatric Electrophysiology Telehealth Clinics: A Real-World Case Series. Cardiovasc Digit Health J. 2020. PMCID:PMC7538375  PMID:33043315 
  11. Delayed Development of Coronary Artery Dilitation in Suspected Severe Acute Respiratory Syndrome Coronavirus 2 Multisystem Inflammatory Syndrome: More Research Needed. Crit Care Explor. 2020;2(10):e0236. PMCID:PMC7531755  PMID:33063036 
  12. Successful Institutional Development of a Pediatric Exercise Stress Testing Program after the Establishment of a Dedicated Exercise Team JEPonline. 2020;23(3):8. 
  13. Institutional experience of healthy pediatric patients presenting with atrial fibrillation who had an electrophysiology study. J Card Surg. 2020. PMID:32163635 
  14. Recanalization of an atretic intramural left main coronary artery after bypass surgery in a pediatric patient with anomalous aortic origin of the left main coronary artery arising from the right sinus of Valsalva. Catheter Cardiovasc Interv. 2019. PMID:31802625 
  15. Erythematous atrophic plaque in the inguinal fold. Cutis. 2016;97(5):334;341;342. PMID:27274547 
Last updated: 12/02/2022
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