Did extreme liquid diet cause Shane Warne's death?

The coroner has confirmed Aussie cricketer Shane Warne died of natural causes on Friday.

The 52 year old suffered a heart attack at his villa in Thailand.  The Chief of Police in Koh Samui said Shane was asthmatic and had seen a doctor about his heart.

Earlier today, experts warned people of the dangers in doing the extreme 14 day liquid diet Shane had just completed.  His long-term manager said he had just completed one and had done this "ridiculous" diet a number of times.  It's unknown if this liquid diet was a contributing factor to his fatal heart attack.