Figure 1. (A) Plasma renin activity, (B) plasma concentrations of angiotensin II, (C) epinephrine, and (D) norepinephrine measured before, during, and up to 24 h after surgery. Data are expressed as mean +/-SEM; *P < 0.05, significantly different between the control and ACEI groups; (degree)P < 0.05, significantly different compared with preanesthesia values.