Figure 4

Cross-sectional image at 4 weeks after AMI. (A) Representative Masson's trichrome staining of hearts at 4 weeks. (B) The blue color indicates fibrosis or scar. EPC transplantation decreased fibrotic scar size compared with PBS. (C) Left ventricular systolic function calculated by fractional shortening (LVFS) was significantly increased in the EPC group at 14 days after AMI. *P < 0.01.