Inclusion Criteria:  Patients hospitalized in the Medical Intensive Care Department of the Amiens-Picardie University Hospital for the management of septic shock. Septic shock is defined by sepsis with a need for vasopressor amines to maintain a mean arterial pressure higher than or equal to 65 mmHg, and associated with hyperlactatemia (higher than 2 mmol/L). A transthoracic echocardiography should be performed within 72 hours of the diagnosis of septic shock.  Exclusion Criteria:  Patient with cardiac arrhythmias, patients with severe mitral or aortic valve disease, patients with fused mitral Doppler flow, patients with insufficient echogenicity to allow a correct assessment of left ventricular systolic function.