Retrospective collection of Wuhan Union hospital from December 1,2018 to June 30,2021 to meet the entry and discharge standards. The patient 's medical record data were divided into study group and control group according to the use of gastrodin during operation. The perioperative data and prognostic outcomes in the patient 's medical records were collected and analyzed. The degree of myocardial injury and postoperative clinical outcomes were compared between the two groups.

Inclusion Criteria:

• Patients aged≥18 years, regardless of gender;
• Patients undergoing elective cardiac surgery under general anesthesia;
• ASA grade 1 ~ 3.

Exclusion Criteria:

• Suffering from more serious genetic diseases (such as immunodeficiency, thalassemia, etc.);
• Moderate to severe malnutrition, moderate to severe anemia;
• Persistent infection;
• Severe preoperative underlying diseases (such as severe liver and kidney dysfunction)

This study included patients who were preoperatively diagnosed as requiring elective thoracic cardiac surgery under general anesthesia.