Figure 1. Results for each individual patient as well as the mean +/- standard deviation are plotted versus time. (Top) The mean arterial pressure response to L-arginine or placebo infusion. Mean arterial pressure decreased compared with placebo, in response to the L-arginine infusion (P < 0.050). (Upper middle) The central venous pressure response. (Lower middle) The systemic vascular resistance. (Bottom) The cardiac output response. Significance indicated with asterisk.