Ganter MT, et al. - Researchers assessed the performance of seven functional hemodynamic parameters simultaneously in the prediction of fluid responsiveness in mechanically ventilated cardiac surgical patients. The following monitoring systems were used to measure hemodynamics: PiCCOplus [stroke volume variation (SVV)_PiCCO, pulse pressure variation (PPV)_PiCCO), LiDCO_rapid (SVV_LiDCO, PPV_LiDCO), FloTrac (SVV_FloTrac), Philips Intellivue (PPV_Philips) and Masimo pulse oximeter (pleth variability index, PVI). They found that potential fluid responders were reliably identified by using all functional hemodynamic parameters tested except for PVI. However, prediction of fluid responsiveness via PVI after cardiac surgery may not appear suitable.