HGF and Arrhythmia: While the arrhythmia score for evoked VA in the PBS group was quite high, this score was significantly reduced in the HGF-MSC and MSC groups (HGF-MSC group 1.11±1.17 vs. PBS group 4.90±1.37, P<0.01; MSC group 2.56±1.13 vs. PBS group 4.90±1.37, P<0.01) (Fig. 6D).