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Ghiadoni, L. et al.

Lorenzo Ghiadoni, Giuseppe Penno, Chiara Giannarelli, Yvonne Plantinga, Melania Bernardini, Laura Pucci, Roberto Miccoli, Stefano Taddei, Antonio Salvetti, Stefano Del Prato,

Metabolic syndrome and vascular alterations in normotensive subjects at risk of diabetes mellitus.

We evaluated the possible association between early vascular abnormalities and the metabolic syndrome (MS) in 77 normotensive subjects (mean age: 50 years) at risk of developing diabetes for family history of diabetes, obesity, or impaired fasting glucose. Fifty healthy subjects were recruited as controls. MS was defined according to the ATP III criteria. Brachial artery endothelium-dependent and -independent vasodilation were assessed as flow-mediated dilation (FMD) and response to glyceryl trinitrate (GTN, 25 microg sublingual), respectively, by automatic computerized edge detection system. Carotid-femoral pulse wave velocity (PWV) and radial augmentation index (AIx) were assessed by applanation tonometry. PWV was significantly (P<0.01) higher in subjects with MS (n=29, 9.0+/-1.9 m/s) as compared with those without MS (n=48, 7.7+/-1.2 m/s) and controls (7.2+/-1.5 m/s). FMD was significantly (P<0.05) reduced in both subjects with (5.8+/-2.7%) and without MS (6.1+/-3.7%) as compared with controls (6.9+/-2.5%). No significant differences were found for response to GTN and AIx. PWV and FMD were significantly (P<0.05) affected by increasing number of MS components. Among the components of the MS, only blood pressure significantly affected PWV, whereas blood pressure and fasting glucose influenced FMD. Logistic regression analysis showed that MS was associated with increased risk of altered PVW (odd ratio: 7.95, confidence limits: 1.06 to 69.11), whereas only blood pressure component was significantly related with increased risk of impaired FMD (odd ratio: 3.60, confidence limits: 1.01 to 12.78). In conclusion, in normotensive subjects at risk of developing diabetes mellitus, the presence of MS is associated with a selective alteration of central PWV.[1]

References

Metabolic syndrome and vascular alterations in normotensive subjects at risk of diabetes mellitus. Ghiadoni, L., Penno, G., Giannarelli, C., Plantinga, Y., Bernardini, M., Pucci, L., Miccoli, R., Taddei, S., Salvetti, A., Del Prato, S. Hypertension (2008) [Pubmed]

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