A meta-analysis of 14 air pollution studies around the world found that exposure to high levels of air pollutants in childhood increases the potential for high blood pressure in children and adolescents and the risk of high blood pressure in adults. .. This study is published in a special issue on air pollution. Journal of the American Heart Association..
Other studies examine the effects of diesel exhaust on the muscle sympathetic nerves: Impact of pollutants on hypertension; rate of readmissions due to heart failure in people exposed to high levels of air pollution. Risk of stroke and heart attack after prolonged exposure to high levels of particulate matter. This study includes health results for people exposed to pollutants in the United States, China and Europe.
Hypertension in childhood and adolescence is a risk factor for hypertension and heart disease in adulthood. However, studies of air pollution and blood pressure in adolescents and children have drawn inconsistent conclusions. This systematic review and meta-analysis pooled information from 14 studies focused on the association of adolescents with air pollution and blood pressure. The large analysis included data on more than 350,000 children and adolescents (mean age 5.4 to 12.7 years).
“Our analysis is the first to scrutinize previous studies to assess both the quality and magnitude of the association between air pollution and blood pressure levels between children and adolescents,” said the lead study. The author, Dr. Yao Lu, MD, said the professor. Professor at the Clinical Research Center of the 3rd Shoya Hospital of Zhongnan University in Changsha, China, and the Faculty of Life Sciences and Medicine at King’s College London. “The findings provide evidence that there is a positive link between short-term and long-term exposure to certain environmental air pollutants and blood pressure in children and adolescents.”
The analysis included 14 studies published by September 6, 2020, investigating the effects of long-term exposure (> 30 days) and / or short-term exposure (> 30 days).
The studies were divided into groups based on the length of exposure to air pollution and the composition of air pollutants, specifically nitrogen dioxide and particulate matter 10 μm or 2.5 μm in diameter. (Most of the studies linking heart disease to particulate matter focus on the mass of particulate matter classified by aerodynamic diameter (μm or PM).) Fine particles are defined as PM2.5 and above. I am. Coarse particles are defined in PM10. The concentration of particulate matter is usually measured by mass per volume of air (μg / m).3).
The meta-analysis concluded that:
- Short-term exposure to PM10 was significantly associated with elevated systolic blood pressure in adolescence (top number of blood pressure measurements).
- The duration of long-term exposure to PM2.5, PM10, and nitrogen dioxide was also associated with elevated systolic blood pressure levels.
- Higher diastolic blood pressure levels (bottom of blood pressure measurements) were associated with long-term exposure to PM2.5 and PM10.
“Efforts should be made to reduce exposure to environmental pollutants to reduce the effects of environmental pollution on the blood pressure of children and adolescents,” Lu said. “In addition, it is very important to measure blood pressure in children and adolescents on a regular basis, which helps identify people with high blood pressure early.”
The results of the analysis were limited to the studies included and did not include data on the potential interactions between different pollutants, so the results cannot be generalized to all populations. In addition, the analysis included the most common and more widely studied pollutants and air pollutants that were found to affect heart health, but few studies.
Hypertension associated with short-term and long-term exposure to some air pollutants
Journal of the American Heart Association (2021). DOI: 10.1161 / JAHA.120.017734
Courtesy of the American Heart Association
Quote: Air pollution associated with hypertension in children; other studies were obtained from https://medicalxpress.com/news/2021-05-air-pollution-linked-high-blood.html on May 4, 2021. Working on air quality and heart (May 4, 2021)
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Air pollution related to high blood pressure in children; other studies address air quality and heart
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