Assessment of Agreement Between Two Measurement Methods of Left Ventricular Outflow Tract (LVOT) Velocity Time Integral (VTI)

"An echocardiographic exam is realised after inclusion, measuring especially :~* LVOT VTI~* Respiratory variation of inferior veina cava diameter For theses two measurements, the manual method is first recorded, and then the automated one is done.~For patients that need fluid resuscitation of at least 250mL in less than 10minutes (indication at the discretion of the physician in charge of the patient), a second echocardiography is done according to the same protocol described before."