Swedish research suggests men who do not openly express their anger if they are unfairly treated at work double their risk of a heart attack. The researchers looked at 2,755 male employees in Stockholm who had not had a heart attack when the study began. They were asked about how they coped with conflict at work, either with superiors or colleagues. The researchers say their study shows a strong relationship between pent-up anger and heart disease. They believe that anger can produce physiological tensions and if not released these lead to increases in blood pressure which eventually damage the cardiovascular system. Writing in the Journal of Epidemiology and Community Health, the researchers called the various strategies for keeping things bottled up, covert coping.<br/><br/>