"Following the Bruins game on November 26, 2017, Charlie told team physicians that he experienced heart palpitations during the game," Bruins internist Dr. David Finn said. "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."
McAvoy, 20, has 25 points (five goals, 20 assists) in 45 games, and is second on the Bruins in average ice time per game at 22:48, behind Zdeno Chara (23:26).
The Bruins, who are 12-0-4 in their past 16 games, entered Monday second in the Atlantic Division with 62 points, three behind the first-place Tampa Bay Lightning. They next play against the New Jersey Devils at TD Garden on Tuesday (7 p.m. ET; SN, NESN, MSG, NHL.TV).