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Anger and other strong emotions can trigger potentially deadly heart rhythms in certain vulnerable people, U.S. researchers said on Monday.
Previous studies have shown that earthquakes, war or even the loss of a World Cup Soccer match can increase rates of death from sudden cardiac arrest, in which the heart stops circulating blood.
"It's definitely been shown in all different ways that when you put a whole population under a stressor that sudden death will increase," said Dr. Rachel Lampert of Yale University in New Haven, Connecticut, whose study appears in the Journal of the American College of Cardiology.
Sudden cardiac death accounts for more than 400,000 deaths each year in the United States, according to the American College of Cardiology.