研究顯示 噪音或增加心血管疾病的風險
A preliminary study showed that exposure to environmental noises might increase the risk of heart attacks and strokes.
一項初步研究顯示，接觸環境噪音可能增加心臟病和中風的風險。Noises can fuel the activity of a brain region involved in stress response and in turn promote blood vessel inflammation, according to the study to be presented at the American Heart Association's Scientific Sessions.
這項將在美國心臟病協會科學會議上發佈的研究稱，噪音能加劇參與應激反應的腦區的活動，從而增加血管炎症反應。The findings revealed that people with the highest levels of chronic noise exposure had an increased risk of suffering cardiovascular events, like heart attacks and strokes.
研究結果顯示，最能長期接觸噪音的人羣，發生心臟病、中風等心血管事件的風險會增加。
Researchers analyzed the links between noise exposure and major cardiovascular events among 499 healthy people (average age 56 years).
研究人員以499名健康狀況良好、平均年齡56歲的人爲研究對象，分析了接觸噪音與主要心血管事件之間的關聯。Of the 499 participants, 40 experienced a cardiovascular event over a 5-year period.
5年間，這499人中有40人出現了心血管病情。People with the highest levels of noise exposure had higher levels of activity in the amygdala, an area of the brain involved in stress regulation and emotional responses, and more inflammation in their arteries.
研究顯示，接觸噪音最多的人，杏仁核（參與壓力調控和情緒反應的腦區）活動水平更高，血管炎症反應更多。These people also had a greater than three-fold risk of suffering a heart attack or a stroke and other major cardiovascular events, compared with people who had lower levels of noise exposure, according to the study.
這些人發生心臟病或中風等主要心血管事件的風險也是接觸噪音較少的人的三倍多。That risk remained elevated even after the researchers accounted for other cardiovascular and environmental risk factors, including air pollution, high cholesterol, smoking and diabetes.
即使研究人員排除空氣污染、高膽固醇、吸菸和糖尿病等其他心血管和環境風險因素後，這些人發生心血管事件的風險依然更高。
