Biological Phosphocalcic Metabolism and Coronary Artery Calcifications

Inclusion Criteria: * Hospitalization for a cardiovascular check in the Detection Centre and the Atherosclerosis Prevention (CHU Rangueil Toulouse) * In primary prevention of coronary heart disease * Introducing an intermediate cardiovascular risk according to the European SCORE equation, that is to say, a risk of cardiovascular death at 10 years greater than or equal to 1% and less than 5% * signed the informed consent, Exclusion Criteria: * Chronic renal failure patients with an estimated GFR less than 60 mL / min / 1.73m2, due to alterations in phosphate metabolism, * Patients receiving glucose-lowering therapy, * Patients with a fasting blood glucose greater capillary or equal to 1.10 g / l, confirmed by a plasma glucose greater than or equal to 1.10g / l. * The diuretic therapy patients (due to a change in urinary electrolytes) * HIV-positive patients for HIV, antiretroviral (due to a change in urinary electrolytes) * Pregnant women, * Patients under judicial protection, guardianship or trusteeship.