Nicolas Madsen, M.D.

Nicolas Madsen, M.D.

Chief, Division of Pediatric Cardiology

  • Pogue Family Distinguished Chair in Pediatric Cardiology
  • Pediatrics - Cardiology
  • Pediatric acute care cardiology
  • Congenital Heart Disease


Nicolas L. Madsen, M.D., M.P.H., is a Professor in the Department of Pediatrics at UT Southwestern Medical Center. He specializes in pediatric cardiology and congenital heart disease, with a particular focus on hospital-based management.

Dr. Madsen earned his medical degree at the University of Washington, where he also completed a residency in pediatrics and received advanced training through a pediatric cardiology fellowship. Additionally, he holds a master’s degree in public health from the University of Washington.

Certified by the American Board of Pediatrics in pediatric cardiology, Dr. Madsen joined the UT Southwestern faculty in 2021. Previously, he served as Medical Director of the Heart Institute and the Acute Care Cardiology Unit at Cincinnati Children’s Hospital Medical Center.

Dr. Madsen is a nationally recognized clinician and researcher in acute care cardiology and congenital heart disease. He is co-founder and Executive Director of the Pediatric Acute Care Cardiology Collaborative (PAC3), an organization that enables medical professionals across North America to collaborate to improve care of and outcomes in children who are hospitalized with heart conditions.

He serves as Chief of the Division of Pediatric Cardiology as well as Co-Director of the Heart Center at Children’s Health. A Fellow of the American Academy of Pediatrics, he is a member of numerous professional societies, including the American College of Cardiology, the Pediatric Congenital Heart Association, and the American Heart Association.

Dr. Madsen is an Adjunct Professor at Aarhus University in the Department of Clinical Epidemiology. In addition, he has a dual appointment at UT Southwestern as Associate Professor in the Department of Data Science and Population Health.

He has delivered scores of presentations, contributed to books such as Common Cardiac

Issues in Pediatrics, and published a number of academic articles related to his areas of expertise.

“I can think of no greater profession than pediatric cardiology,” Dr. Madsen says. “The opportunities for positive and lasting impact are evident everywhere and across the lifespan. It is a privilege to provide the most advanced clinical care for the benefit of our patients, from the newborn period and throughout their potentially complex journey to adulthood.”

Personal Note

Dr. Madsen enjoys spending time with his family and discovering new trails in the great outdoors. In addition to English, he speaks Danish.

Education & Training
  • Medical School - University of Washington School of Medicine (2001-2005)
  • Residency - University of Washington/Seattle Children's Hospital (2005-2008), Pediatrics
  • Other Post Graduate Training - University of Washington School of Public Health (2008-2011)
  • Fellowship - University of Washington/Seattle Children's Hospital (2009-2012), Pediatric Cardiology
Professional Associations & Affiliations
  • American Academy of Pediatrics
  • American College of Cardiology
  • American Heart Association
  • Dallas County Medical Society
  • Pediatric Cardiac Critical Care Consortium
  • Pediatric Congenital Heart Association
  • Pediatric Heart Network
Honors & Awards
  • Cincinnati Top Doctors 2020
  • Top Abstract (CVDY) 2019, American Heart Association Scientific Sessions
  • Cincinnati Top Doctors 2019
  • Patient Education Advocacy Award 2018, Home Care for Heart Health
  • Clinical Care Achievement Award 2017, Cincinnati Children’s Hospital
  • Heart Hero Award 2017, Pediatric Congenital Heart Association
  • Make a Difference Award 2016, Cincinnati Children’s Hospital
  • Early Bird Career (Specialty Focus) Best Poster 2015, American Heart Association Scientific Sessions
  • Advocacy Day Training Scholarship Award 2015, AAP Section on Cardiology and Cardiac Surgery
  • Third Place Abstract 2014, 24th Annual Symposium on the Adult with Congenital Heart Disease
  • Outstanding Fellow Teaching Award 2012, Seattle Children’s Hospital
  • Young Investigator Award Finalist 2011, AAP Section on Cardiology and Cardiac Surgery
  • Education Travel Grant Recipient 2011, AAP Section on Cardiology and Cardiac Surgery
  • Corkey Travel Award 2011, Seattle Children’s Hospital, University of Washington School of Medicine
  • Fellow’s Teaching Award 2011, Seattle Children’s Hospital
  • Cardiology Outstanding Investigator Award 2010, Children’s Hospital of Philadelphia
  • Young Investigator’s Travel Award 2010, Pediatric Academic Society Annual Meeting
  • Loan Repayment Program Recipient 2009-2011, National Institute of Health
  • Outstanding Clinical Research Award 2010-2012, Seattle Children’s Fellow’s College Research Day
  • Travel Grant 2009, Department of Clinical Epidemiology, University of Aarhus, Denmark
Books & Publications
  • Pediatric acute care cardiology
  • Long-term outcomes in congenital heart disease
  • Quality improvement science

Clinical Focus

  • Pediatric acute care cardiology
  • Congenital Heart Disease
  • Post-operative surgical care

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