We recently started using the Edwards FloTrac for our Triple H patients. The first round went really well, the second round did not go as well. The problem we are having is the variability with the numbers. We are following the Stroke Volume Variation (SVV) instead of the Stroke Volume Index (SVI). I am wondering if anyone else is using this to monitor fluid status for your Triple H patients and what are your parameters for treatment? Do you follow the SVV or the SVI? I would rather not go back to our pulmonary artery catheters, but if we can't find a solution that will be what is necessary.