Abstract
Purpose: Immigration from a Third-World society to a Western society can be associated with higher blood pressure and salt sensitivity. We therefore tested whether immigrants from Afghanistan to Denmark compared with non-immigrant Danes exhibit a (i) higher 24-h ambulatory blood pressure (24-h ABP) and (ii) blunted renin response to a change in salt intake. Methods: Twenty-four-hour ABP was measured in 40 men of Afghan (Afghans) and 40 men of Danish (Danes) origin. Each group was divided into young (20-30 years, n = 20) and middle aged (40-60 years, n = 20). A 3-day low (70 mmol per 24-h) and a 3-day high (250 mmol per 24-h) salt intake were in addition instituted in subgroups of the young groups (n = 18). Results: Young and middle-aged Afghans exhibited a lower 24-h mean arterial pressure (24-h MAP) than the same respective age groups of Danes (83 ± 1 versus 90 ± 1 mm Hg, P<0·05, and 89 ± 2 versus 100 ± 1 mm Hg, P<0·05). 24-h ABP did not change in any of the young groups during increased salt intake, whereas the Danes exhibited a greater decrease in plasma renin activity (PRA) (P<0·05). Plasma noradrenaline (PNA) was significantly higher among the young Afghans. Conclusions: Afghan immigrants to Denmark exhibit a lower 24-h ABP than Danes. In young Afghans, PRA is less sensitive to changes in salt intake, while PNA is higher and may reflect their lower systolic blood pressure and/or arterial pulse pressure. Whether these hormonal differences can explain the lower 24-h ABP in Afghans should be further explored.
Original language | English |
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Journal | Clinical Physiology and Functional Imaging |
Volume | 33 |
Issue number | 6 |
Pages (from-to) | 470-7 |
Number of pages | 8 |
ISSN | 1475-0961 |
DOIs | |
Publication status | Published - Nov 2013 |
Keywords
- Adult
- Afghanistan
- Age Factors
- Biological Markers
- Blood Pressure
- Blood Pressure Monitoring, Ambulatory
- Denmark
- Emigrants and Immigrants
- Humans
- Hypertension
- Male
- Middle Aged
- Norepinephrine
- Renin
- Risk Factors
- Sex Factors
- Sodium Chloride, Dietary
- Time Factors
- Young Adult