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The effect of BKCa blockade with 0.2 (n=6), 0.5 (n=7) and 1.0 (n=7) mM TEA on relaxation responses to sodium nitroprusside after preconstriction with a single dose of 10−5 M phenylephrine in denuded human uterine artery rings from 9 women. Open bars represent control responses in the absence of blockade and do not differ (P=0.5, ANOVA). Responses with 0.2 and 0.5 mM TEA do not differ from control. *P=0.018 (paired t test) compared to control.
