How Stress Harms the Heart

Illustration by Sydney Rae Hass for TIME

It’s clear that there’s a link between stress and heart health; what’s not clear yet is why the two are connected. Now, a new study suggests that people with higher levels of stress also have more inflammation in their arteries, putting them at higher risk for heart problems.

In the new study, presented at the American College of Cardiology’s 65th Annual Scientific Session, researchers used imaging to look at 293 people’s brains and arteries. They found that stress activity in an area of the brain called the amygdala, which is where emotions are processed, was linked to more inflammation in a person’s arteries. “This is notable because arterial inflammation is an important driver of atherosclerotic disease, the major cause of heart attacks and stroke,” says study author Dr. Ahmed Tawakol, co-director of the cardiac MR PET CT program at Massachusetts General Hospital.

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