Focused Assessed Echocardiography to Predict Fluid Responsiveness

Fluid bolus of 500 ml of crystalloids is given over 15 minutes. Positive fluid responsiveness is defined by an increase in SV of at least 15%.

Focused transthoracic echocardiography is performed to assess expansion of stroke volume after fluid challenge. Also mitral E and A waves, left ventricle outflow tract velocity time integral (LVOT VTI) and its variability, inferior vena cava diameters during breathing cycles are measured.