The coroner's report on the ULTIMATE WARRIOR came in yesterday, and as expected, he died of heart disease. The technical term the coroner used was, "Atherosclerotic / Arteriosclerotic Cardiovascular Disease."
Warrior's death was also listed as "natural", meaning neither drugs nor alcohol were directly involved. (Of course, PAST substance abuse could have led to his condition. But that's all speculation at this point.)
The WWE will pay tribute to THE ULTIMATE WARRIOR on tonight's "Raw". They're also airing a special on the WWE Network on Wednesday night.