Jun 9, 2010

Science Scene - Heartfelt

Working 10 hours or more a day may harm the heart, according to a study of more than 10,000 British civil servants. 

People who added three or more hours to a seven-hour day had a 60 percent greater risk of heart attack, angina and death from cardiovascular disease than those with no overtime work, researchers from Britain, Finland and France reported in the European Heart Jour­nal. The findings are from the Whitehall II study, which has tracked British civil servants since 1985.

The results bolster evidence that suggests working over­time is linked to poor health and may play a greater role in heart disease than previously thought, wrote Gordon Mc­Innes, a professor of clinical pharmacology at the University of Glasgow, in an editorial ac­companying the study.

Physicians should consider working hours when patients experience chest pain or show symptoms of heart disease, he said.

"Employees with the highest risk of coronary heart disease claimed to work 11 to 12 hours per day, a most unusual work pattern certainly in the Euro­pean context," McInnes wrote. "Overtime-induced work stress might contribute to a substan­tial proportion of cardiovascu­lar disease."

About 10 percent of the civil servants tracked worked three or four extra hours a day. Those workers tended to have an aggressive and competi­tive pattern of behavior, signs of psychological distress, and possibly a lack of sleep, said the researchers, led by Marianna Virtanen of the Finnish Insti­tute of Occupational Health in Helsinki.

Over the 11 years studied, the researchers found 369 cases of fatal coronary heart disease, heart attacks that weren't lethal and angina, a severe chest pain caused by the narrowing of the arteries that supply the heart muscle. Additional studies are needed to explain the link between overtime and heart health, they said.

Cannot say that I am overly worried, since my norm has been 9-10 hour days on average, this is not a stressor for me.  However, if you suddenly find your work hours increased, beware the unseen consequences.


  1. Maybe I ought to tell my boss to shave three hours a day off my work schedule.
    I wonder if that'll be good? =)

  2. I work about ten hours a day but take lots of breaks and try to enjoy myself.

  3. So in other words, I need to start picking out my coffin!!

  4. During a heart attack, if the blockage in the coronary artery isn’t treated quickly, the heart muscle will begin to die and be replaced by scar tissue. This heart damage may not be obvious, or it may cause severe or long-lasting problems.


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