The condition of Calgary Flames assistant general manager Chris Snow, who was diagnosed with ALS in 2019, has taken a turn for the worse, his wife Kelsie Snow said Wednesday on social media.

Chris Snow and his wife, Kelsie, have been very public about his condition since he was diagnosed with amyotrophic lateral sclerosis (ALS), better known as Lou Gehrig's disease. Wednesday, Kelsie Snow announced that he went into cardiac arrest on Tuesday.

"With a shattered heart I've come to share that yesterday Chris became unresponsive and went into cardiac arrest," Kelsie Snow posted to X. "Paramedics and doctors were able to get his heart beating again but, devastatingly, a scan showed Chris has suffered a catastrophic brain injury caused by lack of oxygen. His doctors do not expect him to wake up from this."