Your examples from your particular area of research are very illustrative of the issues. The fact that highly specialized care is needed for both diagnosis and management of congenital cardiac conditions undoubtedly causes structural causes of health care disparities to be exacerbated. Further, this complexity will put more stress on the providers, which will limit their ability to overcome their bias or to recognize and overcome their assumptions about patients. I see a broad range of research opportunities open to you in this area!