Remnant vasoconstriction after preincubation with phentolamine (0.1 μmol/L) on the frequency—contraction curves performed in mesenteric segments of control and pregnant rats.

Results (means ± S.E.M.) are expressed as percentages of the response elicited by 75 mM KCl.
*P<0.05 vs. conditions without phentolamine at each frequency (Bonferroni test).
#P<0.05 vs. Control.
n = 8 animals per group.
Remnant vasoconstriction after preincubation with phentolamine (0.1 μmol/L) on the frequency—contraction curves performed in mesenteric segments of control and pregnant rats.