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Medicina is published by MDPI from Volume 54 Issue 1 (2018). Articles in this Issue were published by another publisher in Open Access under a CC-BY (or CC-BY-NC-ND) licence. Articles are hosted by MDPI on mdpi.com as a courtesy and upon agreement with Lithuanian Medical Association, Lithuanian University of Health Sciences, and Vilnius University.
Open AccessArticle

The Effect of Atmospheric Temperature and Pressure on the Occurrence of Acute Myocardial Infarction in Kaunas

Department of Environmental and Occupational Medicine, Medical Academy, Lithuanian University of Health Sciences, Lithuania
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Medicina 2013, 49(10), 70; https://doi.org/10.3390/medicina49100070
Received: 23 September 2013 / Accepted: 30 October 2013 / Published: 4 November 2013
Objective. The aim of the study was to evaluate the impact of meteorological variables (atmospheric temperature and pressure) on the daily occurrence of acute myocardial infarction (AMI).
Material and Methods
. The study used the daily values of atmospheric temperature and pressure in 2000–2007. The meteorological data were obtained from the Lithuanian Hydrometeorological Service for Kaunas. The relative risks of event occurrence were computed for 5°C atmospheric temperature and for 10-hPa atmospheric pressure variations by means of the Poisson regression model.
Results.
The occurrence of AMI and atmospheric temperature showed an inverse linear relationship, while the occurrence of AMI and atmospheric pressure, a positive linear relationship. Among the youngest subjects (25–44 years old), no relationships were detected. Contrary, among the subjects aged 45–64 years and those aged 65 years and older, the occurrence of AMI significantly decreased with higher temperature (P=0.001 and P=0.002, respectively). A decrease in atmospheric temperature by 10ºC reduced the risk of AMI by 8.7% in the age groups of 45–64 and 65 years and older and by 19% in the age group of 25 years and older. Among the first AMI cases, the risk increased by 7.5% in the age group of 45–64-year olds and by 6.4% in the age group of 25–64-year olds. The relationship between atmospheric temperature and pressure, and AMI occurrence was found to be linear but inverse. An increase in atmospheric pressure by 10 hPa resulted in an increase in risk by 4% among the subjects aged 65 years and more and by 3% among the subjects aged 25 years and more.
Conclusions
. Atmospheric temperature and pressure variations had the greatest effect on middle- aged and aging subjects (starting from 45 years). At younger age, the effect of such factors on the AMI risk was considerably lower.
Keywords: acute myocardial infarction; atmospheric temperature; atmospheric pressure; meteorology acute myocardial infarction; atmospheric temperature; atmospheric pressure; meteorology
MDPI and ACS Style

Radišauskas, R.; Vaičiulis, V.; Ustinavičienė, R.; Bernotienė, G. The Effect of Atmospheric Temperature and Pressure on the Occurrence of Acute Myocardial Infarction in Kaunas. Medicina 2013, 49, 70.

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