As he said in a Twitter message on Tuesday, Glenn "Hurricane" Schwartz had a double-bypass operation this morning that his employer, NBC10, described as "successful."
In a release posted on the station's website, Schwartz was quoted as saying that he noticed the symptoms when he was swimming while on vacation during the weekend.
"I started feeling this pressure in my upper chest that I hadn't felt before," he was quoted as saying.
He saw a doctor Monday morning, and it was determined that Schwartz had a "99 percent" blockage of a major artery.
It was not known when he would be back on the air.