  Advanced surgical procedures for congenital heart diseases (CHDs) require
precise planning before the surgeries. The conventional approach utilizes
3D-printing and cutting physical heart models, which is a time and resource
intensive process. While rapid advances in augmented reality (AR) technologies
have the potential to streamline surgical planning, there is limited research
that evaluates such AR approaches with medical experts. This paper presents an
evaluation with 6 experts, 4 cardiothoracic surgeons, and 2 cardiologists, from
Children's Healthcare of Atlanta (CHOA) Heart Center to validate the usability
and technical innovations of CardiacAR, a prototype mobile AR surgical planning
application. Potential future improvements based on user feedback are also
proposed to further improve the design of CardiacAR and broaden its access.
