Relationship between the triglyceride-glucose index and coronary vascular function in patients with suspected coronary artery disease

The TyG index was independently associated with coronary vascular function, including both epicardial artery and microcirculatory function. The patients without obstructive CAD and those with a decreased CFR exhibited an increased TyG index, indicating a relationship between the TyG index and microcirculatory dysfunction. The TyG index, as a marker of metabolic health, was also related to microvascular injury. Our results provide insights into the association between the TyG index and coronary vascular function, which may inform clinical risk assessment.