The Bloodsport star was said to have been hospitalised after collapsing on the set of his new film Weapon just a day after his 50th birthday on Monday (18Oct10).
But Van Damme has taken to his official Facebook.com page to clear up the rumours, insisting he's fit and well.
He writes, "Hours ago, I read a rumour online about me suffering heart attack!
"Please, do not believe all what you read from rumours on any unofficial JCVD sites. Jean-Claude Van Damme is 100 per cent healthy, training well for taking the fight (sic) and sending his fans & friends much love."