Pediatric Cardiology

Kenneth A. Fox, MD

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Clinical Assistant Professor, Division of Cardiothoracic Surgery, Department of Surgery
Clinical Assistant Professor, Department of Pediatrics
(520) 626-9752

Dr. Kenneth Fox, a UA clinical assistant professor of surgery, specializes in the surgical repair of congenital heart defects in children and adults.  He comes to Tucson from Austin, Texas, where he had a successful private practice for 15 years.  He also served as medical director of the Children's Regional Heart Program at the Children's Hospital of Austin and the Dell Children's Medical Center, also in Austin.

Dr. Fox earned his medical degree from the University of Illinois, Chicago and completed his general surgery residency at the University of Arizona.  He then completed his thoracic surgery residency at the University of Michigan and a pediatric cardiothoracic surgery fellowship at C.S. Mott Children's Hospital at the University of Michigan.

He is board certified in surgery, thoracic surgery and congenital heart surgery.

"We are pleased Dr. Fox has joined the cardiothoracic surgical team at Banner - University Medical Center Tucson.  His expertise in congenital heart surgery for both pediatric and adult patients will allow for the continued growth and expansion of our already strong program in congenital heart surgery," said David A. Bull, MD, chief of the Division of Cardiothoracic Surgery.


Mary-Jane Barth, MD

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Clinical Associate Professor, Division of Cardiothoracic Surgery, Department of Surgery
(520) 626-9752

Mary-Jane Barth, MD, is an accomplished pediatric cardiac surgeon in the Division of Cardiothoracic Surgery in the Department of Surgery.

Dr. Barth joined the UA from the Children's Hospital of Saint Francis in Tulsa, Okla., where she was adjunct clinical associate professor of pediatrics for Oklahoma State University and site director of the Pediatric Cardiac Surgery/Pediatric Residency Program for the University of Oklahoma College of Medicine.  She completed medical school, a general surgery residency and cardiothoracic surgery residency at UT Southwestern in Dallas, Texas.  She then went on to complete two fellowships in pediatric cardiac surgery, the first at the Heart Institute for Children in Oak Lawn, Illinois and the second at Birmingham Children's Hospital in England.  

She is board certified in thoracic surgery and in congenital heart surgery.  



Katri V. Typpo, MD, MPH

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Assistant Professor of Pediatrics
(520) 626-5485

Katri V. Typpo, MD, MPH, is an assistant professor of pediatrics at the University of Arizona. Dr. Typpo is certified in pediatrics and pediatric critical care by the American Board of Pediatrics. 

Prior to joining the University of Arizona College of Medicine - Tucson, Dr. Typpo was an investigator in the division of Health Policy and Quality for the Veterans Affairs Medical Center as well as an assistant professor of pediatrics at the Baylor College of Medicine. Since 2012, Dr. Typpo has led a multidisciplinary group for the Pediatric Intensive Care Unit (PICU) Quality Improvement Project which has developed and implemented guidelines for enteral nutrition delivery for children in the PICU.

Voted "Best Doctors in America" for Pediatric Critical Care in 2013 and 2014.



Her current research as a scholar in the Pediatric Critical Care and Trauma Scientist Development Program (PCCTSDP) and supported trainee on the Arizona Health Sciences Center Career Development Award examines non-nutritive benefits of enteral and parenteral nutrition on intestinal epithelial barrier function and microbiome diversity in two populations of critically ill children: children who require mechanical ventilation and infants with congenital heart disease.


B.S.: University of California - Los Angeles, Los Angeles, CA, 1997

  Major: Neuroscience

 M.D.: Saint Louis University School of Medicine, St. Louis, MO, 2001

M.P.H.: UT School of Public Health, Houston, TX, 2006

Residency: Baylor College of Medicine & Affiliated Hospitals, Pediatric Residency Program, Houston, TX, 2001-2004

Pediatric Critical Care Fellowship: Baylor College of Medicine, Section of Critical Care Medicine, Houston, TX, 2004-2008



Alpha Omega Alpha Medical Honor Society, 2000-present

Society of Critical Care Medicine, 2004-present

American Academy of Pediatrics, Member & Fellow, 2008-present

Critical Care Medicine Journal, Reviewer, 2011-present

Pediatric Acute Lung Injury and Sepsis Investigators (PALISI), Pediatric Critical Care Section Representative, 2012-present

Pediatric Acute Lung Injury and Sepsis Investigators (PALISI) PEDAL subgroup, 2013-present

The American Society for Parenteral and Enteral Nutrition, 2013-present

Frontiers in Pediatric Critical Care Medicine, Review Editor, 2014-present

Michael Seckeler, MD, MSc

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Assistant Professor, Pediatrics (Cardiology)
(520) 626-5585

Michael Seckeler, MD, MSc, focuses on optimizing the care of patients with single-ventricle anatomy, acute rheumatic fever/rheumatic heart disease, and pulse oximetry screening to detect asymptomatic cyanotic congenital heart disease in newborns.

As a pediatric resident at the University of Arizona College of Medicine in 2006,  Dr. Seckeler conducted a pilot study funded by a UA Sarver Heart Center Investigator Award, under the  mentorship of Scott Klewer, MD, professor, UA Department of Pediatrics and researcher with the Steele Children’s Research Center. The results of the study provided evidence to the efficacy of employing pulse oximetry as a universal screening test to detect cyanotic congenital heart disease. This study led Banner-University Medical Center, formerly University of Arizona Medical Center, to become the first hospital in Tucson to adopt pulse oximetry screening on all newborns. In 2011, the U.S. Health and Human Services Secretary’s Advisory Committee on Heritable Disorders in Newborns and Children, the American Academy of Pediatrics, the American College of Cardiology Foundation and the American Heart Association made recommendations for newborn pulse oximetry screening of CCHD. Read More

Board Certifications:
American Board of Pediatrics
American Board of Pediatrics (Pediatric Cardiology)

Medical School:
University of Maryland School of Medicine, 2003

University of Arizona College of Medicine, 2006

University of Virginia (Pediatric Cardiology), 2012
Cincinnati Children's Hospital Medical Center (Interventional Cardiac Catheterization), 2013


Daniela Lax, MD

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Associate Professor of Pediatric Cardiology
(520) 626-5585

Scott E. Klewer, MD

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Professor of Pediatric Cardiology
The Sarver Heart Center's Peggy M. Barrett Endowed Chair for Congenital Heart Disease in Adults
Member, Steele Children’s Research Center
(520) 626-5585

Scott Klewer, MD, professor of pediatrics in the UA College of Medicine – Tucson, Sarver Heart Center’s Peggy M. Barrett Endowed Chair for Congenital Heart Disease in Adults, is a member of the national medical advisory board for the Adult Congenital Heart Association (ACHA).

ACHA connects college health professionals to promote healthy communities and individuals. “This is a tremendous opportunity to collaborate with others around the country who are working to improve care for adults with congenital heart disease and incorporating care for these patients into the education programs for cardiologists who work with adults,” says Dr. Klewer.

A generation ago, few children born with congenital heart disease lived to adult age, so adult cardiologists had little need to study congenital heart conditions. Today, the population of adults living with congenital heart disease is expanding. Dr. Klewer’s goals are to provide quality care for patients as they transition from pediatrics to adult care, and increase education and training about moderate to complex congenital heart problems to cardiologists.

Brent Barber, MD

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Professor of Pediatric Cardiology
(520) 626-5585
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