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Education & Training

  • Fellowship, Adult Congenital Heart Disease, 2016
    Children's Hospital of Philadelphia
  • Fellowship, Interventional Cardiology, 2016
    Children's Hospital of Philadelphia
  • Fellowship, Pediatric Cardiology, 2014
    Children's Hospital of Philadelphia
  • Residency, Pediatrics, Internal Medicine, 2011
    Duke University Medical Center
  • Internship, Pediatrics, Internal Medicine, 2008
    Duke University Medical Center
  • MD, 2007
    Duke University School of Medicine
  • BA, 2003
    Dartmouth College

Board Certifications

  • American Board of Internal Medicine
  • American Board of Internal Medicine/Adult Congenital Heart Disease
  • American Board of Pediatrics
  • American Board of Pediatrics/Pediatric Cardiology

Awards & Recognition

  • Top Doctors Washingtonian (2022, 2021)

National Provider ID: 1164697603


Tacy Downing, M.D., is an interventional and adult congenital cardiologist who sees patients at the main campus in Washington, D.C. Dr. Downing received a medical degree and combined residency training in pediatrics and adult internal medicine at Duke University Hospital. She then completed a pediatric cardiology fellowship at the Children's Hospital of Philadelphia, with advanced training in interventional catheterization and adult congenital heart disease.

Dr. Downing is board certified in pediatrics, internal medicine, pediatric cardiology and adult congenital heart disease. She specializes in diagnostic and interventional catheterization for congenital heart disease patients of all ages (infant through adult). She performs a wide range of procedures including device closure of atrial septal defect, ventricular septal defect, and patent ductus arteriosus, as well as transcatheter pulmonary valve replacement.

Dr. Downing's clinical and research interests include long-term outcomes in adults with single ventricle heart disease, radiation reduction in the congenital catheterization laboratory, and team-based optimization of vascular access in infants with heart disease.

Research & Publications

Reintervention Burden and Vessel Growth After Surgical Reimplantation of a Pulmonary Artery During Childhood. (2017). Pediatric Cardiology.

Surgical and Catheter-based Re-interventions are Common in Long-Term Survivors of the Fontan Operation. (2017). Circulation: Cardiovascular Interventions.

Long-Term Survival after the Fontan Operation: Twenty Years of Experience at a Single Center. (2017). Journal of Thoracic and Cardiovascular Surgery.

Effect of Fontan-Associated Morbidities on Survival with Intact Fontan Circulation. (2017). American Journal of Cardiology.

Tetralogy of Fallot – General Principles of Management. (2015). Cardiology Clinics.

Cumulative Medical Radiation Exposure Throughout Staged Palliation of Single Ventricle Congenital Heart Disease. (2015). Pediatric Cardiology.

Cumulative Exposure to Medical Sources of Ionizing Radiation in the First Year After Pediatric Heart Transplantation. (2014). Journal of Heart and Lung Transplantation.

Accuracy of Conventional Oximetry for Flow Estimation in Patients with Superior Cavopulmonary Connection: A Comparison with Phase-Contrast Cardiac MRI. (2013). Circulation: Cardiovascular Imaging.