What caused Hegstrand’s death?

The professional wrestling tag team the Road Warriors were first who introduced bodybuilding-type muscularity in this sport. Hawk (Mike Hegstrand) and Animal (Joe Laurinaitis) have been comprised this tag team. Hegstrand died in 2003. The death of this person was sudden because of a heart attack. This professional wrestler died at the age of 46. It is known that popular media usually writes about deaths of professional wrestlers, connecting the cases with administration of anabolic steroids. The death of Hegstrand was not an exception. After the death of this person a lot of articles appeared in newspapers which demonized anabolic steroids for this case.
Joe “Animal” Laurinaitis admitted to administration of steroids by this wrestling team. But he pointed out that these products hadn’t caused Hegstrand’s death. He added that other aspects were responsible for Hegstrand’s death as well as deaths of other wrestlers. Joe Laurinaitis pointed out that such drugs, as cocaine and Xanax had to be demonized for such cases. Laurinaitis announced that he wanted to explain that steroids had not been linked with death of Hegstrand.
Joe Laurinaitis confirmed that cocaine and Xanax had contributed in the death of this wrestler. He also noticed that these drugs led to deaths of such celebritites, as Henning, Rick Rude and Davey Boy Smith. According to Laurinaitis, administration of cocaine frequently leads to administration of morphine. These drugs destroy health wholly and cause heart attacks.
Why must explanation of Laurinaitis be true? He was in Australia with Hegstrand. He knows about what he speaks. Recently this wrestler joined to Andrew William Wright to tell his experiences with “Hawk”.