Campbell's daughter, Allison, is best friends with Teresa's older sister, Grace, 14.

Grace is one of the Bartlinskis' four biological children. The couple adopted Teresa and four other special-needs girls from China.

Teresa's condition was the most severe of all the Bartlinskis' adopted children. Ed Bartlinski said the procedure to attach the artificial heart failed because doctors weren't able to properly fit tubes from the device to circulate blood to her damaged lungs.

Her condition, hypoplastic left heart syndrome, can be survived, but early medical intervention is necessary.

Teresa, known as "Liu Fang" and "FangFang" in China, was abandoned in Shanxi, west of Beijing, in a place where whoever left her knew she'd be found, the family said.

Eventually, she came into the care of an American orphanage in China called Half the Sky. The founder, Jenny Bowen, said in an earlier statement to The Baltimore Sun that Teresa is a child she would always remember.

"Among all the thousands of children we work with at Half the Sky, there are a few I know I will never forget," Bowen said in a November statement. "All of our children are survivors, but a special few seem to embrace life completely. You can see in their eyes that they know how precious life is. FangFang is one of those rare, magical children who seem to treasure every moment."

Visitation and funeral arrangements for Teresa have not been set.

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To help with Teresa's medical bills

A group, "Believe In Miracles," was established to take donations to help cover the medical expenses incurred by the Bartlinskis.

To contribute, send donations to Believe In Miracles, P.O. Box 21199, Catonsville 21228.