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Overall heart surgery outcomes

The Herma Heart Institute offers excellent outcomes for patients with surgical needs that range from routine to the most complex, as outlined in the graphic that follows. Our program consistently outperforms when it comes to congenital heart surgery outcomes for even the most complex types of heart disease, as evaluated by the Society of Thoracic Surgeons (STS). 

Common types of surgery within each STAT category


Atrial septal defect (ASD) repair | Aortic stenosis, subvalvar, repair | Repair of partial or intermediate AV canal | Ventricular septal defect (VSD) repair


Coarctation of the aorta repair | Fontan procedure | Glenn procedure (bidirectional) | Tetralogy of Fallot repair


Arterial switch operation (ASO) | Atrioventricular canal (AV) repair | Pulmonary artery reconstruction


Aortic arch repair ASO + VSD | Heart transplant | Total anomalous pulmonary venous return repair (TAPVR)


Transposition of the great arteries repair | Norwood procedure | Truncus + interrupted aortic arch (IAA) repair 

Herma Heart Institute - Survival Rates

Data shown is that most recently released by the Society for Thoracic Surgeons and is “risk adjusted,” meaning that it factors in how complex a surgery is, which may impact the risk to the patient. For hospitals like Children’s that treat the most complicated cases, risk adjustment allows a more realistic comparison of our outcomes (see blue circles) against the national aggregate of reporting hospitals (see gray circles) . Risk adjusting is based on internationally recognized methods (in this case, the Society of Thoracic Surgeons-European Association for Cardio-Thoracic Surgery, or STAT method), which group procedures into categories according to how complex they are.

For details on what surgeries typically fall into each STAT category, please access the following article: O’Brien SM, Clarke DR, Jacobs JP, Jacobs ML, et al. (2009) An empirically based tool for analyzing mortality associated with congenital heart surgery. The Journal of Thoracic and Cardiovascular Surgery. Link

Interested in learning more about STS and how to interpret the data? Learn more about the Pediatric Congenital Heart Association's breakdown of STS data and reporting.

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Our outcomes

Families worldwide trust the Herma Heart Institute for their child’s cardiac care. Learn the key quality and outcome measures that parents should look for in a heart program, and see how the Herma Heart Institute compares.

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Traveling with a sick child to a new city can be stressful. Our Access Center can make your visit to our hospital as easy as possible.

Nationally recognized


Among the nation's best

U.S. News & World Report has once again ranked the Herma Heart Institute at Children's Hospital of Wisconsin among the top programs in the nation for pediatric cardiology and heart surgery. This ranking reflects the excellent outcomes and care we provide for even the most complex heart conditions. Families travel from across the country, and even around the world, to receive care from our specialists who are experienced in treating congenital heart disease from before birth and into adulthood.