Correlation Between Triglyceride Glucose Index and Myocardial Injury Assessed by Cardiac Magnetic Resonance Imaging (CMR) in Patients With STEMI

This research aim is to investigate the correlation between triglyceride glucose index (TyG index) and myocardial infarct size, microcirculation obstruction (MVO) and intramyocardial hemorrhage (IMH) assessed by cardiac magnetic resonance imaging (CMR) in patients with ST-segment elevation myocardial infarction (STEMI), and to evaluate its value as a potential predictor of myocardial injury.To further determine the influence of TyG index on the prognosis of STEMI patients after PCI.This cohort included 674 patients with STEMI undergoing primary percutaneous coronary intervention (pPCI). Baseline clinical data were collected and cardiac magnetic resonance imaging was performed approximately 7 days after Acute Myocardial Infarction(AMI). Patients were divided into three groups according to the TyG index , namely high TyG index group, medium TyG index group and low TyG index group. Multiple linear regression, Pearson/Spearman correlation analysis and Logistics regression analysis were used to analyze the correlation between TyG index and myocardial infarct size, microcirculation obstruction and intramyocardial hemorrhage.Eventually, we came to the conclusion that the TyG index was independently associated with severity of myocardial injury after STEMI as assessed by CMR. TyG index is not only an independent predictor of microcirculation disturbance in STEMI patients, but also significantly correlated with poor cardiovascular prognosis. is a powerful marker for stratifying risk of adverse cardiovascular events.