Relation of Serum Vitamin D to Risk of Mitral Annular and Aortic Valve Calcium (from the Multi-Ethnic Study of Atherosclerosis)

Martin Tibuakuu, Di Zhao, Ian H. de Boer, Eliseo Guallar, Anna Bortnick, Pamela L. Lutsey, Matthew J. Budoff, Jorge Kizer, Bryan R. Kestenbaum, Erin D. Michos

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Abstract

Serum 25-hydroxyvitamin D [25(OH)D] concentration has been identified as a possible modifiable risk factor for cardiovascular disease (CVD). We hypothesized that serum 25(OH)D concentration would be associated with calcifications of the left-sided heart valves, which are markers of CVD risk. Aortic valve calcium (AVC) and mitral annular calcium (MAC) were quantified from cardiac computed tomography scans performed on 5,530 Multi-Ethnic Study of Atherosclerosis participants at the baseline examination (2000 to 2002) and at a follow-up visit at either Examination 2 (2002 to 2004) or Examination 3 (2004 to 2005). 25(OH)D was measured from serum samples collected at the baseline examination. Using relative risk regression, we evaluated the multivariable-adjusted risk of prevalent and incident AVC and MAC in this ethnically diverse population free of clinical CVD at baseline. The mean age of participants was 62 ± 10 years; 53% were women, 40% white, 26% black, 21% Hispanic, and 12% Chinese. Prevalent AVC and MAC were observed in 12% and 9% of study sample, respectively. There were no significant associations between 25(OH)D and prevalent AVC or MAC. Over a mean follow-up of 2.5 years, 4% developed incident AVC and 5% developed incident MAC. After adjusting for demographic variables, each 10 ng/ml higher serum 25(OH)D was associated with a 15% (relative risk 0.85, 95% confidence interval 0.74 to 0.98) lower risk of incident MAC but not AVC. However, this association was no longer significant after adjusting for lifestyle and CVD risk factors. Results suggest a possible link between serum 25(OH)D and the risk for incident MAC, but future studies with longer follow-up are needed to further test this association.

Original languageEnglish (US)
JournalAmerican Journal of Cardiology
DOIs
StateAccepted/In press - Feb 18 2017

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ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

Cite this

Tibuakuu, M., Zhao, D., de Boer, I. H., Guallar, E., Bortnick, A., Lutsey, P. L., Budoff, M. J., Kizer, J., Kestenbaum, B. R., & Michos, E. D. (Accepted/In press). Relation of Serum Vitamin D to Risk of Mitral Annular and Aortic Valve Calcium (from the Multi-Ethnic Study of Atherosclerosis). American Journal of Cardiology. https://doi.org/10.1016/j.amjcard.2017.05.004