Grammer, a 53-year-old actor best known for playing erudite psychiatrist Frasier Crane on the classic TV sit-coms "Cheers" and "Frasier," reportedly has been making the publicity rounds for his new movie, "Swing Vote."
"Kelsey felt faint last night so he went to the hospital to have things checked out," his publicist told Usmagazine.com. "They are altering his medications."
The married father of three is expected to leave the hospital Tuesday, the entertainment news Web site reported.
Grammer recently talked to "Entertainment Tonight" about the harrowing experience of his June heart attack.
"They had to blast me twice and get me started all over again," he said. "I did think: 'Oh gosh, I have got to hang on. I've got too much junk I've got to take care of. I've got to take care of the family.'"