NDRG4 and myocardial infarction: In order to further verify the protective effect of NDRG4 in the heart, we injected Ad in the left ventricle of the rat to overexpress NDRG4, and through echocardiography and hemodynamic detection of the corresponding indicators, it was found that heart tissue of rats after overexpression of NDRG4 can dramatically improve the heart function reduction caused by MI, and rat serum LDH and CK-MB activity was also dramatically reduced.