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22 December 2015 : Clinical Research  

Vitamin D Level is Associated with Increased Left Ventricular Mass and Arterial Stiffness in Older Patients with Impaired Renal Function

Jing ChangABCDEFG, Xiao-Guang YeBCE, Yuan-Ping HouBD, Jin-Ling WuB, Sheng-Li LiBE, Qian-Mei SunBDFG

DOI: 10.12659/MSM.896559

Med Sci Monit 2015; 21:3993-3999

Abstract

BACKGROUND: Impaired renal function is common among older patients. Deficiency of vitamin D is a frequent phenomenon among patients with impaired renal function, who are likely to develop cardiovascular diseases. This study aimed to explore the association of 25 (OH) D levels with left ventricular mass and arterial stiffness in older patients with impaired renal function.

MATERIAL AND METHODS: Based on their admission estimate glomerular filtration rate (eGFR), 273 inpatients (≥65 years) were allocated into a normal eGFR group (≥60 ml/min) and an impaired eGFR group (<60 ml/min). The 25 (OH) D levels were measured and the left ventricular mass index (LVMI) was estimated. Pulse wave velocity (PWV) was used to explore arterial stiffness.

RESULTS: The 25 (OH) D levels of patients in the impaired eGFR group were significantly lower than in the normal eGFR group [(11.92±6.01) μg/L vs. (18.14±8.07) μg/L, p<0.05). LVMI and PWV were both significantly higher in the impaired eGFR group than in the normal eGFR group [(104.89±33.50) g/m2 vs. (92.95±18.95) g/m2, P<0.05; (15.99±3.10) m/s vs. (13.62±2.90) m/s, P<0.05]. After adjusting for age, sex, eGFR, cardiovascular risk factors, serum calcium, and iPTH levels, the inverse association between LVMI and 25 (OH) D, PWV, and 25 (OH) D were statistically significant.

CONCLUSIONS: Vitamin D level is lower in older patients with impaired renal function. Lower vitamin D levels were correlated with higher left ventricular mass and increased arterial stiffness in older patients.

Keywords: Aged, 80 and over, Glomerular Filtration Rate, Heart Ventricles - pathology, Kidney - physiopathology, Organ Size, Vascular Stiffness, Vitamin D - blood

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750