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London, UK – 30 Aug 2015 : Young adults living in a polluted city show early signs of cardiovascular risk, according to research presented at ESC Congress today by Dr Krzysztof Bryniarski from Jagiellonian University, Collegium Medicum in Krakow, Poland.1 Residing in a polluted city was associated with higher levels of inflammatory markers in otherwise healthy adolescents and young adults, which indicate a greater risk of having a heart attack in future.
EMBARGO : 30 August 2015 at 11:00 BST
Dr Bryniarski said: “This study was conducted by a group of medical students from Jagiellonian University in Krakow, supervised by Professors T. Guzik and A. Wysokinski, who wanted to know what impact long term air pollution is having on the cardiovascular health of young adults. Krakow is one of the most polluted cities in Europe. We decided to compare some markers of cardiovascular risk in our city with risk in Lublin, which has similar general demographic characteristics but much lower traffic congestion and two fold lower air pollution.”The current study assessed the association between long term air pollution exposure and blood pressure and inflammatory markers in Krakow and Lublin, two large Polish cities each with more than 300 000 inhabitants. It included 826 randomly selected healthy young adults aged 16 to 22 years (average age 18), of whom 444 lived in Krakow and 382 lived in Lublin. Participants came from similar types of schools and social backgrounds and had lived in their home city since birth.The researchers measured blood pressure, heart rate and blood levels of inflammatory markers including C-reactive protein (CRP), high sensitivity CRP (hsCRP), homocysteine and fibrinogen which are early indicators of cardiovascular disease. They also assessed numerous potential confounding factors such as body mass index (BMI), lifestyle, ethnicity and family history.Data on air pollution was obtained from air quality monitoring stations. Average 10 year air pollution levels were nearly double in Krakow compared to Lublin. Average PM2.5 levels for example were 41.7 µg/m3 in Krakow and 22.4 µg/m3 in Lublin while PM10 was 56.9 µg/m3 in Krakow and 29.4 µg/m3 in Lublin.The investigators found significantly higher levels of CRP, hsCRP, homocysteine and fibrinogen levels in Krakow residents compared to Lublin residents (p<0.0001 for all). The highest levels of these inflammatory markers was found in overweight (BMI 25-37 kg/m2) participants living in Krakow. “Our study shows that young adults living in a polluted city have higher levels of inflammatory markers than those living in a city with less pollution,” said Dr Bryniarski. “This may suggest that these young adults are at greater risk of having a heart attack in future as the inflammatory process has already started.”There were no major differences in subjects’ blood pressure between the two cities, nor were there differences in smoking, physical activity levels, BMI, age or other confounding factors.Dr Bryniarski concluded: “We have shown that living in a highly polluted city can have an impact on cardiovascular risk markers even at an early age. This may occur through chronic low grade inflammation. This is the first study to establish a link between residence in a city with very high air pollution and cardiovascular risk in young adults, in whom cardiovascular risk is typically not yet considered and who have not had contact with health services before.”
1Dr Bryniarski will present the abstract ‘Risk of hypertension and chronic low grade inflammation amoung healthy young subjects living in the cities with different ambient air pollution’ during:• The press conference ‘Environment and the Heart’ on Sunday 30 August at 11:00• The session ‘Hypertension population science’ on Sunday 30 August at 14:00 in the Tirana room, Village 3
SOURCES OF FUNDING: The study was funded by “Generation of the Future” - the Polish Ministry of Science and Higher Education Research Grant co-financed by the European Union from the European Regional Development Fund.
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About the European Society of CardiologyThe European Society of Cardiology (ESC) represents more than 90 000 cardiology professionals across Europe and worldwide. Its mission is to reduce the burden of cardiovascular disease in Europe. About ESC Congress 2015ESC Congress is the world’s largest and most influential cardiovascular event contributing to global awareness of the latest clinical trials and breakthrough discoveries. ESC Congress 2015 takes place 29 August to 2 September at ExCel London in London, UK. Access the scientific programme. More information is available from the ESC Press Office at email@example.com.To access all the scientific resources from the sessions during the congress, visit ESC Congress 365. This press release accompanies both a presentation and an ESC press conference at the ESC Congress 2015. Edited by the ESC from material supplied by the investigators themselves, this press release does not necessarily reflect the opinion of the European Society of Cardiology. The content of the press release has been approved by the presenter.
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