Figure 4. Treatment of porcine aortic endothelial cells with cardioplegic solutions resulted in a significant reduction of Galα1-3Galβ1-4GlcNAc-Rs; 50% less Galα1-3Galβ1-4GlcNAc-Rs were detectable on porcine aortic endothelial cells treated with UW solution at 4C for 4 hours if compared with the control group cooled at 4C without any cardioplegic solution (P = .006). In the histidine-tryptophan-ketoglutarate series, 32% less Galα1-3Galβ1-4GlcNAc-Rs were detectable on porcine aortic endothelial cells treated with histidine-tryptophan-ketoglutarate solution at 4C for 4 hours if compared to the control group cooled at 4C without any cardioplegic solution (P = .011).