VIDEO : Carrie Fisher's Cause of Death Still Officially Unknown

Carrie Fisher's death certificate has been released nearly two weeks after her death. E! News reports the Star Wars star's immediate cause of death was listed as "cardiac arrest/deferred." The Los Angeles County Coroner's Office is expected to perform more testing--including toxicology tests--to determine what triggered her heart attack aboard an airplane bound to Los Angeles from London. Fisher's mother Debbie Reynolds died from a stroke just days after her daughter's death. Both Hollywood stars were honored at a joint funeral inside Forest Lawn Memorial Park.