Representative histological images shown are of IgG-Fc-treated (A) and ephrinA1-Fc-treated (B) hearts 4 days post-MI. There was a 50% reduction in infarct size (C), 64% less necrosis (D), 35% less chamber dilatation (E), and 32% less thinning of the left ventricular free wall (F) in ephrinA1-Fc-treated hearts compared to IgG-Fc-treated hearts. n = 7 control, n = 9 IgG-Fc, n = 9 ephrinA1-Fc. P < 0.05: †different from control; *different from IgG-Fc. LV, left ventricle; RV, right ventricle; N, necrosis; G, granulation tissue.