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'Stress Ball' in Your Brain May Be Key to Heart Risks

New brain-scan study helps pinpoint a neurological link between anxiety, cardiovascular disease.

By Robert Preidt, HealthDay News

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There is a correlation between elevated levels of activity in the amygdala (illustrated above) and a higher risk of heart disease and stroke.
There is a correlation between elevated levels of activity in the amygdala (illustrated above) and a higher risk of heart disease and stroke.
Getty Images

Doctors have long known that a stressed life does no favors for the heart, and new research may help unravel why that's so.

A Harvard team says heightened activity in a key part of the brain may explain why stress boosts people's odds for heart disease and stroke.

The finding "raises the possibility that reducing stress could produce benefits that extend beyond an improved sense of psychological well-being," said study lead author Dr. Ahmed Tawakol, who co-directs the cardiac imaging program at Massachusetts General Hospital in Boston.

One neurologist agreed that the research could have real value for patients.

"This study provides information that can help us better understand the mechanisms in which the body and the brain affect each other," said Dr. Jeffrey Borenstein. He is president of the Brain & Behavior Foundation in New York City.

"A better understanding of this link can help us develop methods of prevention" of heart disease, Borenstein said.

According to Tawakol's team, smoking, high blood pressure and diabetes are well-known risk factors for heart disease and stroke, as is chronic mental stress.

RELATED: Stress May Take Greatest Toll on Younger Women's Hearts

But what exactly is the link between stress and the heart? To find out, the researchers tracked the health of nearly 300 people for an average of about four years. During that time, 22 were diagnosed with a heart attack, angina (chest pain), heart failure, stroke or peripheral artery disease (poor circulation in the legs).

Using PET and CT scans, the investigators found that people with elevated levels of activity in the amygdala -- a small region of the brain closely tied to stress -- were at higher risk for heart disease and stroke.

These people also developed heart problems sooner than people with lower levels of activity in the amygdala, the findings showed.

"Our results provide a unique insight into how stress may lead to cardiovascular disease," Tawakol said in a news release from the journal The Lancet. His team published its findings in the Jan. 11 issue of the journal.

"Eventually, chronic stress could be treated as an important risk factor for cardiovascular disease, which is routinely screened for and effectively managed like other major cardiovascular disease risk factors," Tawakol believes.

Dr. Salman Azhar, who directs stroke services at Lenox Hill Hospital in New York City, applauded the new research.

Azhar described the amygdala as "a football-shaped collection of nerve cells in the brain that influences how we respond to stress."

Using brain scans, Tawakol's group highlighted "a 'street map' that started the amygdala lighting up. That led to the blood vessels lighting up, and that led to more chest pain, heart attacks and strokes," Azhar explained.

And while stress is unavoidable in life, there are steps to take to minimize it -- and shield hearts in the process, he said.

"What matters is how we react to stress," Azhar said.






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Date: 07.12.2018, 19:37 / Views: 84235