I wouldn't worry too much Spug. As I've discussed tonight with a fellow fan, the battering these athletes give their bodies is extreme! Eddie has taken quite a few dodgey looking chair hits to the back of his head in matches lately. These things must take there tole on their bodies and all in the name of entertainment!
I watched the press conference earlier and though Eddies alcohol and substance abuse was common knowledge, it didn't sound like it was a factor in his death, he had been clean for 4 year and was proud of that fact. I don't think anything will be known until an autopsy has been carried out.