A 13-year-old boy believed to be the youngest person ever to receive a Jarvik-7 artificial heart died Thursday night hours after undergoing the implant operation, hospital officials said.

Eric Rutkowski of Milwaukee received the artificial heart at St. Luke's Medical Center in a five-hour operation that ended at at noon, spokeswoman Diane De La Santos said. She said the heart was being used as bridge until a human donor heart could be found.