By Meghan Holohan

Your cheatin’ heart makes Hank Williams weep, but it might kill you.

Researchers in Italy examined monogamy among men and discovered an interesting correlation -- having an extramarital affair increases men’s risk of having a deadly heart attack.

It’s almost cliché: a middle-age man having sex with a woman who is not his wife keels over in flagrante delicto, what’s known as sudden coital death (oh yes, it has a medical name). But like some stereotypes, it appears to be based in truth, says Dr. Marc Gillinov, a heart surgeon at The Cleveland Clinic and co-author of the book "Heart 411," which looks at cases of sudden coital death, among other cardiac events. (Gillinov did not participate in this study.)