Mike Reilly will undergo a procedure to address a preexisting heart condition discovered during routine tests after he was concussed earlier this month. General manager Lou Lamoriello indicated that the condition was identified through echocardiograms as part of Reilly's post-concussion evaluation. At 31 years old, Reilly has been cleared from the concussion but will be out indefinitely while recovering from the heart procedure. Lamoriello expects Reilly to continue his playing career and maintain a full quality of life, though he noted that recovery could take several months. Reilly has been with the Islanders for about a year after being claimed off waivers from Florida and is in his 10th NHL season, having also played for Minnesota, Montreal, Ottawa, and Boston.