Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Scatter plot of ∆ velocity time integral (VTI) versus ∆ dynamic filling index (DFI). ∆DFI is inversely related to ∆VTI for weaning trials located in the lower right and upper left quadrant (normal/improving load-responsiveness and blunted load-responsiveness), whereas those located in the shaded areas (lower left and upper right quadrant) show ∆DFI to be directly related to ∆VTI.
