SEMA3A and myocardial infarction: The major findings were as follow: (i) Local microinjection of SLV-enhanced protein expression of Sema3a in MI border zone; (ii) Myocardial overexpression of Sema3a-attenuated sympathetic reinnervation in MI border zone and (iii) Myocardial overexpression of Sema3a significantly reduced the incidence of PES-induced malignant arrhythmia in this rat MI model.