LOS ANGELES — The family of Bill Paxton has filed a wrongful death lawsuit against a hospital and the surgeon who performed the actor’s heart surgery shortly before he died.

The suit filed Friday against Cedars-Sinai Medical Center alleges the surgeon used a “high-risk and unconventional surgical approach” that was unnecessary and that he lacked the experience to perform.

Paxton’s death certificate says he died Feb. 25, 2017, from a stroke, 11 days after surgery to replace a heart valve and repair aorta damage. Paxton starred in the films ”Titanic” and “Aliens,” and the HBO series “Big Love.”