VEGF, bFGF, HGF and IGF‐1 contents in the CSps group were 3.06, 8.75, 1.61 and 2.54 times those in the Control group, respectively (P < 0.05) at 1 week after myocardial infarction (see also Table 1). Here, IGF1 is linked to myocardial infarction.