Key result
Polar living is linked to higher systolic BP and lower HRV, reaching ~63% adolescent borderline hypertension.
Why the study?
Does living in the Polar region compared to the Subpolar region affect cardiovascular system functional parameters in healthy adolescents?
Cross-Sectional (n=426)
Yes
Does living in the Polar region compared to the Subpolar region affect cardiovascular system functional parameters in healthy adolescents?
Adolescents living in Polar regions exhibit greater sympathetic nervous system activation and higher blood pressure compared to those in Subpolar regions, suggesting an environmental impact on cardiovascular regulation.
Answers are grounded in this paper and cite their sources.
Polar residence associates with higher BP and lower HRV in adolescents; hypothesis-generating and should not yet change practice.
Age features of autonomic nervous regulation of cardiac activity in 426 healthy adolescents aged 14-17 years living in areas of different latitudes, climatic and ecological conditions of the European North - in the Subpolar (64°30' N) and Polar (67°40' N) areas have been detected. Assessment of the cardiovascular system status was carried out with the use of the heart rate variability (HRV) and blood pressure (BP) parameters. The share of persons with borderline hypertension (BP level exceeded the limit of 90 percentile) also increased with age and reached 63% by the age of 17 years. Among the adolescents living in the Polar region according to the HRV and blood pressure indices, there was registered a significant increase in the proportion of persons with a predominance of sympathetic influences on the heart activity. The greatest adrenergic effects on the cardiovascular system were found in the 15-year-old adolescents of the Polar region, they had higher indices of systolic blood pressure, the heart rate and the regulatory systems stress index, as well as lower total HRV spectrum power in comparison with the 15-year-olds adolescents living in the Subpolar region.
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Демин et al. (2015) conducted a cross-sectional in Healthy adolescents (n=426). Living in the Polar region vs. Living in the Subpolar region was evaluated on Cardiovascular system status (heart rate variability and blood pressure). Adolescents living in the Polar region had higher systolic blood pressure and lower HRV than those in the Subpolar region, with borderline hypertension reaching 63% by age 17.
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