Today, February 1, marks the official start of American Heart Month. And while you may be fit and healthy, you need to be on the lookout for warning signs your ticker isn't working the way it should be—especially since heart disease is the leading cause of death in the U.S., according to the Centers for Disease Control and Prevention.
Early detection is crucial, says Laxmi Mehta, M.D. a cardiologist at The Ohio State University Wexner Medical Center. Check out these signals something's up with your heart; they're most often revealed in bed.