Figure 1 - Effect of noradrenaline (4 µg/min, over 30 min, iv), orciprenaline (0.5 mg, iv) and isoprenaline (0.2 mg, sc) on red blood cell CA I and CA II activity. Values are reported as means ± SEM; N = 12-16 patients. *P<0.05 compared with values before treatment (paired t-test).