People.com: TV host Howie Mandel was hospitalized Monday with an irregular heartbeat, but his condition was not believed to be serious, his rep tells PEOPLE.

"Doctors expect him to be released and back to work [Tuesday]," rep Lewis Kay says.

"He did not have a heart attack," adds Kay, refuting reports.

The Deal Or No Deal host, 53, was in Toronto to shoot his new NBC show Howie Do It.

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