Relation between parathyroid hormone and cardiovascular risk in patients with vitamin D deficiency
2013
BACKGROUND AND OBJECTIVES: Vitamin D deficiency and parathyroid hormone (PTH) are associated with an increased cardiovascular risk and arterial stiffness. The aim of our study is to compare the cardiovascular risk in subjects with low vitamin D, attending to the PTH concentration, as well as evaluating the response after administration of vitamin D. PATIENTS AND METHODS: Prospective study of patients with a concentration of 25(OH)-vitamin D below 30nmol/l. We evaluated vascular risk parameters as blood pressure, arterial stiffness, lipid profile and glucose metabolism. Patients received vitamin D supplements for 3 months, after which the previous parameters were reassessed. RESULTS: A total of 32 patients were included. Those with PTH over 65pg/ml were older, had worse renal function, higher systolic blood pressure, pulse pressure and arterial stiffness. Treatment with vitamin D showed a statistically significant trend to lower blood pressure and pulse wave velocity. CONCLUSIONS: The increase in PTH in patients with low vitamin D involves poor control of blood pressure and increased vascular stiffness. Vitamin D replacement shows a tendency to reduce these parameters.
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