Figure 3From: Potassium channel openers and prostacyclin play a crucial role in mediating the vasorelaxant activity of Gynura procumbens Concentration-relaxation curves for the 8 sub-fractions in the isolated rat aortic rings. The fractions-induced relaxations were studied on endothelium-intact aortic rings precontracted with either (a) PE or (b) KCl. Values are mean ± S.E.M (n = 6), *P < 0.05 compared with other sub-fractions.Back to article page