Christa Pike has been discharged from the hospital and returned to prison, 10 days after she survived an attempt to execute her, her lawyers said Saturday.

Pike, 50, is back at the Debra K. Johnson Rehabilitation Center in Nashville, where she has been held for about 30 years. "She is grateful to the first responders and her medical team for their care in these extraordinary circumstances," her attorneys said. "She is continuing to receive medical care at the prison, and we will continue to track her recovery."

On Sept. 30, Tennessee gave Pike two doses of pentobarbital, the drug used in most U.S. lethal injections. Soon after the first dose, she said her arm was burning and asked whether it was supposed to feel that way, NPR reported. After the second dose she lost consciousness but kept breathing and making choking sounds, said attorney Randy Spivey, who was there.

Pike was taken to the hospital in critical condition. At one point she was declared brain dead, The Guardian reported. Then, in a turnaround that stunned doctors, she woke up and began talking. Last week her lawyer said she was "up and walking." She is believed to be the only person to survive a lethal injection, the BBC reported.

Tennessee's prison agency has not explained what went wrong, but it has defended its method. At a hearing on Wednesday, a state lawyer told the judge he did not know whether Tennessee plans to try to execute her again.

Pike was sentenced to death for the 1995 murder of a classmate.

What we know: Christa Pike has left the hospital and is back in prison after Tennessee's failed Sept. 30 execution.
What we don't: Why the execution failed and whether Tennessee will try again.