Shero said doctors found a small hole in the wall of Letang's heart during further medical examinations, and that they are seeking to assess if it led to the stroke.
Letang will be re-evaluated after a six-week treatment period. He was given clearance to go on vacation with his family during the NHL's Olympic break.
"I hope that by making my condition public at this time, I can help other people by encouraging them to seek medical help if they experience some of the symptoms associated with a stroke -- regardless of their age or general health," Letang said. "It obviously was a shock to get the news, but I'm optimistic that I can overcome this and get back on the ice."
6 weeks is the bare minimum then re-evaluation..im kinda shocked that he was given clearance to go on vaction