Responses to phenylephrine (in mesenteric arteries), serotonin (in coronary artery), acetylcholine and sodium nitroprusside in Control, Sham and CPB following different recovery periods.

Data are given as mean±SEM. Abbreviations: Ach, acetylcholine; CPB, cardiopulmonary bypass; Emax, the maximal response; PE, phenylephrine; SE, serotonine; SN, sodium nitroprusside; %- percent of the relaxation.
a-P<0.05 vs Control, One-Way ANOVA with post-hoc Bonferroni test; b- p<0.05 vs Control, t\test.