BluegrassToday.com says the Grand Ole Opry star recently received his diagnosis, and is currently wearing a heart monitor to help doctors keep track of his condition and determine if he needs a pacemaker.  Jesse’s wife Joy says he’s been instructed to take it easy, which is “the hardest part” of the process “for an active guy like him.”  She adds that Jesse is “trying not to overdo it,” but is still “playing his mandolin and taking advantage of this time to practice and write new songs.”

McReynolds launched his music career in the 1940s with his older brother, Jim, as the bluegrass duo Jim and Jesse.  Their partnership ended in 2002 with Jim’s death, after more than 50 years together.  Jesse, who turned 84 last month, has maintained a solo career over the past eleven years.