Al Davis died of heart failure

The cause of former Oakland Raiders owner Al Davis’ death has been determined to have been heart failure.

The death certificate issued by Alameda County — obtained by the San Jose (Calif.) Mercury News — says Davis died at age 82 at 2:45 a.m. on Oct. 8 from an abnormal hearth rhythm, congestive heart failure and a heart muscle disease.

He died at the Oakland Airport Hilton, where he lived during much of the football season.

According to the certificate, Davis also had a form of skin cancer and had undergone throat surgery three days before his death. He also underwent heart surgery in 1996.