(CNN) -- When you get angry, the stress isn't restricted to your head. New research shows that anger actually triggers electrical changes in the heart, which can predict future arrhythmias in some patients.Anger management may be key for patients with heart problems, researchers say.The study, published in the March 3 issue of the Journal of the American College of Cardiology, may demonstrate a link between mental stress and sudden cardiac arrest, which causes more than 400,000 deaths every year.

http://www.cnn.com/2009/HEALTH/02/24/anger.heart/