Low Magnesium Increases Risk for Arterial Stiffness
METHODS: Cross-sectional analysis. Evaluation of vascular stiffness in 512 RTR from two university centres at a median of 72 months post-transplantation. Determination of carotid-femoral pulse wave velocity (PWV) (SphygmoCor). A multiple linear regression analysis was used to investigate the independent relationship between magnesium serum level and PWV with the following covariates: age, diabetes, smoking status, body mass index, blood pressure, heart rate (HR), C-reactive protein (CRP), high-density lipoprotein cholesterol, parathyroid hormone and use of angiotensin-converting enzyme inhibitors/angiotensin receptor blockers, diuretics, calcium channel blockers, statins and calcineurin inhibitors next to their drug levels.
RESULTS: Lower serum magnesium was independently associated with PWV (P = 0.018) in addition to age, CRP, HR, diabetes and mean arterial pressure (model R(2) = 0.45; P < 0.001). The relationship between magnesium and PWV was attenuated (P = 0.054) after adjustment for the use of sirolimus, which was associated with higher magnesium levels (P<0.001) and lower PWV (P = 0.013). In patients >55 years (median age), however (low), magnesium remained an independent predictor of PWV (P = 0.024) after accounting for the same covariates.
CONCLUSIONS: Serum magnesium is an independent predictor of arterial stiffness in RTR, especially in patients >55 years.
Van Laecke S, Maréchal C, Verbeke F, Peeters P, Van Biesen W, Devuyst O, Jadoul M, Vanholder R.
The relation between hypomagnesaemia and vascular stiffness in renal transplant recipients.
Nephrol Dial Transplant.
Renal Division, Department of Internal Medicine, Ghent University Hospital, Ghent, Belgium.