AP:

Canadian freestyle skier Sarah Burke died Thursday, nine days after crashing at the bottom of the superpipe during a training run in Utah.
Burke, who lived near Whistler in British Columbia, was 29. She was injured Jan. 10 while training at a personal sponsor event at the Park City Mountain resort.
Tests revealed Burke sustained “irreversible damage to her brain due to lack of oxygen and blood after cardiac arrest,” according to a statement released by Burke’s publicist.
A four-time Winter X Games champion, Burke crashed on the same halfpipe where snowboarder Kevin Pearce suffered a traumatic brain injury during a training accident on Dec. 31, 2009.
As a result of her fall, Burke tore her vertebral artery, which led to severe bleeding on the brain, causing her to go into cardiac arrest on the scene, where CPR was performed, according to the statement by publicist Nicole Wool.

The rest here.