Mike Reilly, a defenseman for the New York Islanders, will undergo a procedure for a preexisting heart condition discovered during routine tests following a concussion he suffered earlier this month.

Reilly was concussed during a game against the Buffalo Sabres on November 1, 2024, and although he has been cleared from the concussion protocol, he will be sidelined indefinitely for recovery.

The heart condition was detected through echocardiograms as part of Reilly's post-concussion evaluation, a process that general manager Lou Lamoriello described as a 'blessing in disguise'.

Lamoriello noted that such conditions can often go unnoticed, emphasizing the importance of the tests that led to this discovery.

He also mentioned that the recovery process for the heart procedure could take several months, leaving Reilly's return to play uncertain.

Currently, there is no estimated timeline for Reilly's return, but Lamoriello remains optimistic about his ability to resume his playing career and maintain a good quality of life after recovery.

Since the concussion, Reilly has been on injured reserve, missing seven games so far this season.

The 31-year-old defenseman has not recorded any points in 11 games this season, contributing only three hits and four blocked shots.

Reilly has been with the Islanders for about a year after being claimed off waivers from the Florida Panthers, and he is in his 10th NHL season, having also played for teams like Minnesota, Montreal, Ottawa, and Boston.

Lamoriello indicated that while Reilly may be out for several months, he has been cleared from the concussion protocol.