Figure 8.

Comparison of the potencies of K_ATP channel openers for the inhibition of spontaneous phasic activity with potencies obtained for the suppression of electrical field-stimulated contractions. The correlation coefficient was r²=0.89 and slope=1.12. The dashed line represents 1 : 1 correlation. The K_ATP channel openers are 15 fold more potent in suppressing spontaneous phasic activity than contractions evoked by electrical field-stimulation. The −log IC₅₀ data of KCOs for suppression of electrical field-stimulation taken from Buckner et al., 2000.