Kara Kennedy, the oldest child of the late Sen. Edward Kennedy, has died. She was 51.
Patrick Kennedy, a former congressman from Rhode Island, said his sister died Friday while at a Washington, D.C.-area health club.
Kara Kennedy, the oldest of three children, was a lung cancer survivor. Doctors removed a malignant tumor in 2003.
"She's with dad," Patrick Kennedy said. Their father died in 2009.
Patrick Kennedy said his sister loved to exercise but that her cancer treatment "took quite a toll on her and weakened her physically."
"Her heart gave out," he said.