Intense anger or heavy physical exertion may be triggers for a first heart attack in some people, new research suggests.
In the study of more than 12,000 people, both intense activity and intense emotions each seemed to double the odds of suffering a heart attack in the next hour. That risk rose about threefold when people were upset and exerted themselves at the same time.
The study is far from the first to suggest -- and it does not prove -- that bouts of anger or physical exertion can trigger a heart attack.
