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MARICOPA COUNTY, AZ — The Ultimate Warrior, one of the biggest stars of wrestling during the 1980s and 1990s, died of heart disease, according to the Maricopa County (Ariz.) medical examiner’s office.

Warrior, 54, collapsed outside a Scottsdale, Ariz., hotel last Tuesday while walking with his wife Dana. He made his first appearance on “Monday Night Raw” in 18 years the night before his death.

Warrior, 54, died of “atherosclerotic/arteriosclerotic cardiovascular disease” and of natural causes, which means no drugs or alcohol were directly involved in his death.

Born James Hellwig, he had legally changed his name to Warrior. He is survived by his wife and two daughters.

A full autopsy report likely won’t be completed for several months.