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Several studies have linked noise with heart disease, but have failed to characterize the physiological mechanisms responsible for the infection, which has recently been successful by a US research team.
According to the report published on the website of the American Heart Association, researchers have discovered that the amygdala, a region of the brain involved in the regulation of pressure and emotional responses, is particularly responsible for this injury .
The study was conducted on 499 people "of average age of 56 years". All participants were free of cardiovascular disease and noise levels were measured by examining the personal addresses of study participants to estimate noise levels.
The researchers found that people exposed to high noise levels had higher levels of amygdala activity, which promoted inflammation of the blood vessels, resulting in heart disease.
The study estimated that the risk for people exposed to higher noise levels is three times higher than that of people exposed to lower levels.
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