Dallas rookie forward Alex Chiasson won’t play tonight against St. Louis due to distress from the Rich Peverley incident — this according to Mike Heika of the Morning-News.

Chiasson, 23, appeared to be visibly shaken after Peverley collapsed at the bench in the first period of Monday’s game against Columbus. Heika noted that Chiasson visited Peverley in the hospital last night, and it’s unclear if he accompanied the team for its flight to St. Louis.

Today, Stars GM Jim Nill released a statement updating Peverley’s condition:

“Rich Peverley is resting comfortably and being monitored at UT Southwestern St. Paul. He is currently undergoing testing to discover what triggered the cardiac event last night.

The focus of all the testing and monitoring is being dedicated to finding the cause of the event and a long-term solution to rectify the problem.

We do not have any more specifics at the moment.