Teresa, who was born in China, was born with a congenital heart disease that weakened her lungs.
She received a heart transplant last month, but her body rejected that heart.
The artificial heart was meant to be stopgap measure until a second donor heart could be found.
Just before she died, little Teresa asked to have her ears pierced.
In a blog post, her family said, “At 3:23 pm on July 1st, Teresa has ridden her princess bike into heaven to meet Jesus. She had her ears pierced shortly before her last breath. While we were not there when she took her first breath, God blessed us to be there when she took her last.”
The Catonsville girl was being treated at the Children’s Hospital of Philadelphia.