Coronary endothelial function
in vivo. Coronary blood flow (CBF) before and after 60 minutes of reperfusion (A). Endothelium-dependent vasodilatation after intracoronary administration of a single bolus of acetylcholine (10-7 mol) expressed as percent change of coronary blood flow before and after cardiopulmonary bypass (CPB) at 60 min of reperfusion (B). All values are given as mean ± SEM; °p < 0.05 versus before CPB, *p < 0.05 versus control.