Relationship of vitamin D and parathyroid hormone with the nocturnal blood pressure decline in hypertension.

Abstract:

OBJECTIVES:Vitamin D deficiency and high parathyroid hormone (PTH) levels have been linked with hypertension. Nondipper hypertension is associated with increased morbidity and mortality. We aimed to investigate the relationship of vitamin D and PTH levels with nondipper hypertension and nocturnal decline in untreated hypertensive patients. PATIENTS AND METHODS:This cross-sectional study included a total of 73 hypertensive and 34 normotensive participants. Each patient underwent 24-hour ambulatory blood pressure monitoring, routine biochemical tests, vitamin D, and PTH analysis. RESULTS:The study population was divided into three groups according to ambulatory blood pressure monitoring records: 40 nondippers (mean age; 59.8±10.8 years, 24 women and 16 men), 33 dipper hypertensives (mean age; 58±11.8 years, 13 women and 20 men), and 34 normotensives (mean age; 56.9±11.7 years, 19 women and 15 men). Nondipper hypertensives showed lower levels of vitamin D than dippers and normotensives (9.7±6.1 vs. 14.9±10.1 vs. 16.4±9.5 ng/ml, P=0.001, for both) and higher levels of PTH than dippers (74.8±34.7 vs. 53.3±19.9 ng/ml, P=0.001). A significant positive correlation was observed between vitamin D and nocturnal decline (r=0.34, P=0.001), whereas a significant negative correlation was present between PTH and nocturnal decline(r=-0.26, P=0.006). In multivariate analysis, PTH level was correlated independently with nocturnal decline (β=-0.07, 95% confidence interval: -0.114-0.025, P=0.003). CONCLUSION:In this study, vitamin D levels were significantly lower and PTH levels were significantly higher in nondippers. The vitamin D level was correlated positively and the PTH level was correlated negatively with nocturnal decline. In addition, PTH level was associated independently with nocturnal decline in hypertension.

journal_name

Blood Press Monit

authors

Karadag MK,Secen O

doi

10.1097/MBP.0000000000000286

subject

Has Abstract

pub_date

2017-12-01 00:00:00

pages

322-327

issue

6

eissn

1359-5237

issn

1473-5725

journal_volume

22

pub_type

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