In the present study, all subjects were presented with high-risk and complexlesions, the IABP group had more patients with a history of pre-MI and chronicheart failure, the NT-pro BNP level was also higher, reflecting a worse cardiacfunction, which was the reason why more prophylactic IABP was used in thesepatients. The gene discussed is NPPB; the disease is myocardial infarction.