Stress 'causes damage to the heart,' study finds
"Stress is already known to be bad for the heart, but now scientists have discovered why it is so harmful," The Times reports.
A new US study now offers a plausible model of how chronic psychological stress could lead to heart damage. It involved both mice and junior doctors.
Researchers checked the blood of a small group of doctors after a week at work in intensive care. After a week of this stressful work, their white blood cell count had increased.
Similarly, when mice were exposed to chronic stress (tilting their cage for an extended period of time), they also showed increased levels of white blood cells.
This finding is of interest and possible concern. Previous research suggested inflammatory white blood cells might be involved in the process of causing the rupture of fatty atherosclerotic plaques in the arteries of people with heart disease, which causes a heart attack.
However, this research is very far from providing conclusive proof that stress leads to the development of heart disease, or directly causes heart attacks.
"Stress is already known to be bad for the heart, but now scientists have discovered why it is so harmful," The Times reports.
A new US study now offers a plausible model of how chronic psychological stress could lead to heart damage. It involved both mice and junior doctors.
Researchers checked the blood of a small group of doctors after a week at work in intensive care. After a week of this stressful work, their white blood cell count had increased.
Similarly, when mice were exposed to chronic stress (tilting their cage for an extended period of time), they also showed increased levels of white blood cells.
This finding is of interest and possible concern. Previous research suggested inflammatory white blood cells might be involved in the process of causing the rupture of fatty atherosclerotic plaques in the arteries of people with heart disease, which causes a heart attack.
However, this research is very far from providing conclusive proof that stress leads to the development of heart disease, or directly causes heart attacks.