Bilheimer determined that Stormie suffered from a genetic condition known as homozygous familial hypercholesterolemia, which raised her cholesterol levels to more than seven times that of a normal six-year-old. After being put on a low-cholesterol diet, Stormie suffered a heart attack and underwent double bypass heart surgery that October. She suffered a second heart attack almost two months later, requiring a second bypass operation and an artificial mitral valve. Susie Jones was also told that her daughter had less than a year to live. Based on research conducted by two Dallas physicians in the late 70s that linked cholesterol production to the liver, Bilheimer suggested a liver transplant for Stormie. This was to be performed at Pittsburgh's Children's Hospital (now
UPMC Children's Hospital of Pittsburgh). There were very specific reasons for performing a combined heart and liver transplant in this young girl. Due to her inherited condition, Stormie's liver was unable to remove cholesterol, i.e.
LDL-cholesterol, from her bloodstream. As a result, her LDL-cholesterol levels became very high and caused her to have two heart attacks by age six. On the other hand, the transplanted liver, being normal and healthy, was able to clear the LDL-cholesterol from her blood. Indeed, after the transplant, Stormie's LDL-cholesterol declined by 81%—from an astounding 988 to a near-normal 184 mg per deciliter. Dr.
Thomas E. Starzl, recognizing the previous damage already done to Stormie's heart, did not believe a liver transplant alone could save her. Since she was going to require lifelong
immunosuppressant therapy anyway to prevent rejection of her transplanted liver and since her heart had been severely damaged by her previous heart attacks, it was decided to also perform a heart transplant. ==Transplant==