Studies show that men who lose their cool are twice at the risk of heart attack as compared to more mild-mannered men. Susan Everson and her colleagues at the University of Michigan School of Medicine, Ann Arbor, USA, reached the conclusion after studying 2,110 middle-aged men, most of them in their 50s. The researchers say that majority of the stroke victims suffer brain damage or death because they do not get an effective clot-busting drug.