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Scientists Finally Discover How Stress Can Lead To Heart Attacks And Strokes


While the link between stress and heart attacks and strokes is well known, scientists have long failed to establish the exact cause.

Now they believe they have finally cracked it, and it all comes down to heightened activity in the amygdala, the part of the brain that reacts to stress.

The amygdala readies the body for harmful experiences, such as being physically attacked, by telling the bone marrow to temporarily produce more white blood cells. These help fight infection and repair damage to the body.

Chronic stress can lead to a similar reaction, but in the absence of physical damage to repair, excess white blood cells remain in the system. Experts now believe that this in turn can form plaque in the arteries and lead to heart disease, the Telegraph reports.

For the study, researchers at Harvard Medical School scanned 293 patients to monitor activity of their brain, bone marrow, spleen and inflammation of their arteries.

The patients were tracked for an average of 3.7 years and during this period 22 experienced cardiovascular events such as heart attack, angina, heart failure, stroke and peripheral arterial disease.

The findings showed that those with higher activity in the amygdala had a greater risk of cardiovascular disease. They also developed problems sooner compared with those with lower activity.

Heightened amygdala activity was linked to increased bone marrow activity and inflammation in the arteries suggesting that this was causing the increased risk of heart disease.

Lead author Dr Ahmed Tawakol, of Harvard Medical School and Massachusetts General Hospital, said that the results provided a unique insight into how stress may lead to cardiovascular disease.

“This raises the possibility that reducing stress could produce benefits that extend beyond an improved sense of psychological well-being,” he indicated.

“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.”

Researchers, whose findings were published in The Lancet medical journal, say that chronic social stress should also now be considered a major danger alongside smoking, high blood pressure and diabetes when it comes to assessing heart disease risk.

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Comment by DAVI KRISTOFF on January 23, 2017 at 8:54am
This is truth being reported...major key is keeping up that cardio excercising!
Comment by Mike k on January 21, 2017 at 11:19am

I believe this study is definitely on to something. There's no sector of society that is stressed more than the African's. By design I might add, with having to deal with under/unemployment, crime, over policing, substandard schools, denied justice. To compound this dilemma, our communities are deluged by unhealthy lifestyle choices ie. fast/processed foods, alcohol, cigarettes, pollution etc. That is why we are the disproportionate leaders in the way of suffering from diabetes, heart attacks, stroke related ailments & deaths. Sounds entirely logical. Grandmaster Flash's rap tune The Message, is still very relevant today. 

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