Viktor Hraska, MD,PhD

Children’s Wisconsin since 2016
  • Professor Emeritus, Congenital Heart Surgery, the Medical College of Wisconsin




Viktor Hraska MD, PhD was trained at Boston Children’s Hospital. During his career he was in charge of pediatric cardiac surgical programs in Children's Hospital Bratislava, Slovakia, University Hospital Eppendorf Hamburg, Germany, the German Pediatric Heart Center Sankt Augustin, Germany. Before retiring from clinical responsibilities, he was the surgical director of the Herma Heart Institute. Dr. Hraska chose to come to the Herma Heart Institute because of the program’s high quality and multidisciplinary approach to heart care. He looks forward to being involved in several important projects within the institute including developing research initiatives in lymphatics and aortic valve repair and will remain an extremely valued resource for his knowledge and experience in the care of patients with corrected transposition. 

The Herma Heart Institute welcomes second opinions from across the country and around the world. Visit our second opinion page for more information.

Areas of Interest

  • Cardiac research
  • Cardiothoracic surgery
  • Congenital heart surgery
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Education and Awards


  • 1982, Comenius University in Bratislava, MD


  • 1994, Boston Children's Hospital - Pediatric Cardiac Surgery
  • 1984, City Hospital - Surgery
  • 1986, Institute of Cardiovascular Diseases - Vascular Surgery


  • 1993, Children's Hospital - Bratislava - Ped Cardiac Surgery
  • 1987, Institute of Cardiovascular Diseases - Cardiac Surgery
  • 1991, Institute of Cardiovascular Diseases - Ped Cardiac Surgery


  • Milwaukee Magazine Top Doctors

Research and publications


Clinical practice: The surgical treatment of complex congenital cardiovascular defects, performing 200 surgeries annually. Surgical caseload includes many regional, national, and international referrals.

Teaching: Clinical instruction offered to fellows in cardiovascular surgery.

Research: Clinical research is aimed at evaluating cardiovascular outcomes after surgery for congenital heart defects. Research involves introduction of several new techniques for treatment of congenital heart defects into clinical practice