Cardiac surgery is sometimes associated with organ dysfunction of variable severity (renal insufficiency, cognitive decline, arrhythmias, ARDS). The phenomenon responsible is an intense inflammatory reaction induced by cardiopulmonary bypass, leading to microcirculation alterations, specially in endothelial cell and its protective layer - glycocalyx. Endothelial dysfunction then reduces the reactivity of peripheral tissues to hypoxia, and is associated with bad prognosis. High - dose corticoids administration at anesthesia induction in cardiac surgery could attenuate the intensity of this inflammatory reaction, and represents the current practice in our hospital. Nevertheless, this attitude is abandoned in numerous cardiac surgery centres.
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Flow Mediated Vasodilation change
Timeframe: 3 measurements of 5 minutes each - vascular occlusion test once daily during 48h.