2.1 general information
A total of 100 AMI patients receiving PCI in our hospital from June 2018 to June 2019 were selected as the study subjects. Inclusion criteria: (1) complete clinical data; Meet the diagnostic criteria of AMI [7]; (3) the first time, and the operation was successful; (4) the patient is conscious and has good communication skills;( 5) patients are aware of the research content and sign the informed consent. Exclusion criteria: (1) recent infection or other major diseases of the operation; (2) combined with malignant or tumor, stroke; (3) merger of thinking disorders, mental illness. According to the random number method, 100 patients were divided into study group and control group, with 50 patients in each group, including 29 males and 21 females. The average age was 57.45±8.56 years. Cardiac function classification: Ⅰ level 10 cases, Ⅱ 17 cases, Ⅲ 23 cases. The control group included 31 males and 19 females. The average age was 57.97±8.65 years. Cardiac function classification: Ⅰ level 9 cases, Ⅱ 16 cases, 25 cases Ⅲ level. There was no statistically significant difference in gender, age and cardiac function classification between the two groups (P > 0.05), as shown in table 1. This study has been approved by the ethics committee of our hospital.