Fig. 9. Ensembles of changes in cardiac output as shown with each monitor in all patients receiving oxytocin alone (n = 32). The percentage change in cardiac output at peak effect was 32.7% (32.8%) versus 27.8% (18.9%) in the LiDCO plus (LiDCO, Cambridge, United Kingdom) and BioZ (Cardio Dynamics International, San Diego, CA) monitors, respectively. CO = cardiac output.