UPDATE: NHL.com reports this:
Vladimir Shalayev, the managing director for the newly formed Russian league, said a preliminary autopsy showed Cherepanov had a "hypertrophied heart."
"It has nothing to do with yesterday's game, there were absolutely no injuries," Shalayev said in televised comments. "He was not injured during this game."
Cherepanov's agent, Jay Grossman, said the player had tests at the NHL combine before last year's draft that didn't reveal any heart problems. He has been told that players in the Russian league receive regular heart and blood tests, similar to those given in the NHL.
The incident caught the attention of a high-level government meeting, chaired by President Dmitry Medvedev, to discuss how to revitalize Russia's deep sporting traditions.
"A person should not be allowed to take part in competition if he has ischemic heart disease," sports minister Vitaly Mutko said. "This means that in fact there is no preliminary health control and monitoring. And this system should be very well-defined."Crazy.