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J Clin Hypertens (Greenwich). 2008 Feb;10(2):125-9.

Seasonality of hypertension.

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Department of Biochemistry, Ninevah College of Medicine, University of Mosul, Iraq.


In this study, a group of controls and patients with essential hypertension were followed up for 1 year. Four measurements at different day temperatures were performed. In each visit, blood pressure, serum total cholesterol, and high-density lipoprotein cholesterol (HDL-C) were measured. The results showed a significant inverse relationship between mean blood pressure and serum total cholesterol levels with day temperature, while a direct relationship was observed for HDL-C value. These results suggest that in areas where significant changes in day temperature and daylight duration exist at different times of the year, blood pressure, serum cholesterol, and HDL-C levels change accordingly in a cycle with higher blood pressure and serum total cholesterol and lower HDL-C values in the coldest season.

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