Boston Bruins standout rookie defenseman Charlie McAvoy will be out of the B's lineup for at least a couple of weeks after doctors performed a procedure to treat an abnormal heart rhythm.

Here is the press release for team doctor David Finn...

Charlie McAvoy underwent a successful procedure today at the Massachusetts General Hospital to treat an abnormal heart rhythm.

Following the Bruins game on November 26, 2017, Charlie told team physicians that he experienced heart palpitations during the game. Subsequently he underwent an evaluation, which diagnosed him with a supraventricular tachycardia (SVT). The type of SVT Charlie has is not considered to be dangerous to his health but can recur at any time and causes significant symptoms.

After consultation with team physicians, as well as experts in this type of heart condition, Charlie decided to have the condition treated with a procedure called an ablation. The decision to have the procedure done at this time is due to a high probability of recurrence. During the period from the initial occurrence ‪through Saturday's game, Charlie was cleared to play by the medical team and was monitored closely.  

He will be monitored overnight at Mass General and the expected recovery period is two weeks.

The 20-year-old McAvoy is considered one of the top rookie in the NHL. He has five goals and 20 assists for 25 points in 45 games. McAvoy plays on the top defensive pairing with Zdeno Chara.

The Bruins next game is Tuesday night vs New Jersey.