Inclusion Criteria:  Oral, free and informed consent obtained from a trusted person (health care proxy) or a close relative or consent in an emergency situation Adult patient managed in intensive care for whom the physician has decided on hemodynamic management because of signs of acute circulatory failure (systolic blood pressure < 90 mmHg, mean arterial pressure < 65 mmHg, or the need for infusion of vasopressors, skin mottling, diuresis < 0.5 mL/kg/h for a duration ≥ 2 hours, skin recoloring time > 3 sec Arterial lactate level ≥ 3 mmol L-1  Exclusion Criteria:  Person not affiliated to national health insurance Person subject to a measure of legal protection (curatorship, guardianship) Person subject to limited judicial protection Pregnancy or breastfeeding