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Dr. Mahony received her S.B. from the Massachusetts Institute of Technology (MIT) and her M.D. from Stanford University. She completed residency training in pediatrics at Stanford University Medical Center, followed by fellowship training in cardiology at the Cardiovascular Research Institutes/University of California, San Francisco.

She joined the faculty of the University of Texas Southwestern Medical Center in 1985, and is currently Professor of Pediatrics. She is the Director of the Pediatric Cardiology Fellowship Training Program. Dr. Mahony has chaired the NHLBI-funded Pediatric Heart Network since 2001.


Medical School
Stanford University School of Medicine (1975)
Stanford University Hospital (1978), Pediatrics
Research Fellowship
University of California at San Francisco (1981), Pediatric Cardiology
University of California at San Francisco (1981), Pediatric Cardiology

Specialty Areas

Clinical Interest

  • Cardiomyopathy
  • Congenital Heart Disease
  • Dilated Aorta
  • Heart Evaluation in Student Athletes
  • Heart Muscle Disease
  • Marfan's Syndrome
  • Research Interest

    • Congestive heart failure
    • Kawasaki disease
    • Marfan syndrome
    • Quality of life in pediatric patients with heart disease


    Featured Publications LegendFeatured Publications

    Assessment of Quality of Life in Young Patients with Single Ventricle after the Fontan Operation.
    Uzark K, Zak V, Shrader P, McCrindle BW, Radojewski E, Varni JW, Daniels K, Handisides J, Hill KD, Lambert LM, Margossian R, Pemberton VL, Lai WW, Atz AM J. Pediatr. 2016 Mar 170 166-172.e1
    Impact of Surgical Complexity on Health-Related Quality of Life in Congenital Heart Disease Surgical Survivors.
    O'Connor AM, Wray J, Tomlinson RS, Cassedy A, Jacobs JP, Jenkins KJ, Brown KL, Franklin RC, Mahony L, Mussatto K, Newburger JW, Wernovsky G, Ittenbach RF, Drotar D, Marino BS J Am Heart Assoc 2016 5 7
    Design and rationale of a prospective, collaborative meta-analysis of all randomized controlled trials of angiotensin receptor antagonists in Marfan syndrome, based on individual patient data: A report from the Marfan Treatment Trialists' Collaboration.
    Pitcher A, Emberson J, Lacro RV, Sleeper LA, Stylianou M, Mahony L, Pearson GD, Groenink M, Mulder BJ, Zwinderman AH, De Backer J, De Paepe AM, Arbustini E, Erdem G, Jin XY, Flather MD, Mullen MJ, Child AH, Forteza A, Evangelista A, Chiu HH, Wu MH, Sandor G, Bhatt AB, Creager MA, Devereux RB, Loeys B, Forfar JC, Neubauer S, Watkins H, Boileau C, Jondeau G, Dietz HC, Baigent C Am. Heart J. 2015 May 169 5 605-12
    Prediction by clinicians of quality of life for children and adolescents with cardiac disease.
    Costello JM, Mussatto K, Cassedy A, Wray J, Mahony L, Teele SA, Brown KL, Franklin RC, Wernovsky G, Marino BS J. Pediatr. 2015 Mar 166 3 679-683.e2
    Quality of Life in Pediatric Patients Affected by Electrophysiologic Disease.
    Czosek RJ, Cassedy AE, Wray J, Wernovsky G, Newburger JW, Mussatto KA, Mahony L, Tanel RE, Cohen MI, Franklin RC, Brown KL, Rosenthal D, Drotar D, Marino BS Heart Rhythm 2015 Jan


    Featured Books Legend Featured Books

    Honors & Awards

    • Best Pediatric Specialists
      D Magazine (2016)
    • Protocol Chair
      Pediatric Heart Disease Clinical Research Network (NIH) (2011)
    • US News and World Report
      Top US Doctor (2011)
    • Core Clerkship Teaching Award
      Medical Student Teaching (2009)
    • William J. Rashkind Memorial Lecturer
      Cardiology 2009 Meeting, sponsored by the Children's Hospital of Philadelphia (2009)
    • Meritorious Achievement Award
      American Heart Association (2007)
    • Texas Super Doctors
      Texas Monthly Magazine (2005-2016)
    • Editorial Board, Circulation
    • Chair
      Pediatric Heart Disease Clinical Research Network (NIH) (2001)
    • Walter M. Kirkendall, MD, American Heart Association
      Scientist/Educator Volunteer of the Year (1995)

    Professional Associations/Affiliations

    • Dallas County Medical Society (1985-2011)
    • Texas Medical Association (1985-2011)
    • American Academy of Pediatrics (1982-2011)
    • Fellow, American Heart Association (1980-2011)