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A stressful life increases the thickness of the artery walls, leading to high blood pressure and heart disease.
It also increases the production of cortisol. Researchers used high-tech MRI scanners to examine the brains, hearts and bone marrow of nearly 300 patients.
They discovered that people with higher activity in the amygdala region of the brain, the part associated with stress, were 59 percent more likely over the next 3.7 years to develop heart failure.
Stress has been linked to illnesses like cancer, lung disease, bone loss and cirrhosis of the liver.