Table 2.

Maximal relaxation responses and EC₅₀ values of vessels incubated with acetylcholine to Ach of mesenteric arteries from vehicle, Ang II, tempol, tempo with Ang II infusion rats

Response	Maximum (%)	Maximum (%)	P	Log EC50 (mol/L)	Log EC50 (mol/L)	P
				Vehicle	Ang II
Ach	83.9 ± 7.9	36.0 ± 7.0	<0.01	−6.17 ± 0.06	−5.47 ± 0.04	<0.005
EDRF	54.4 ± 4.6	18.0 ± 4.7	<0.01	−6.55 ± 0.06	−5.78 ± 0.05	<0.005
EDHF	29.4 ± 2.7	18.7 ± 2.7	<0.05	−5.18 ± 0.07	−5.46 ± 0.16	ns
EDCF	5.2 ± 4.6	23.0 ± 5.6	<0.05	−4.11 ± 0.35	−4.49 ± 0.03	<0.005
				Tempol	Tempol-Ang II
Ach	88.9 ± 7.9	69.9 ± 8.9	ns	−6.21 ± 0.05	−6.16 ± 0.08	ns
EDRF	53.4 ± 5.7	41.4 ± 4.7	ns	−6.76 ± 0.09	−6.67 ± 0.01	ns
EDHF	35.4 ± 3.7	27.4 ± 4.7	ns	−5.38 ± 0.15	−5.15 ± 0.14	ns
EDCF	5.1 ± 6.2	10.4 ± 4.6	ns	−4.16 ± 0.13	−4.44 ± 0.07	ns

Data were obtained from experiments described in Figure 1.