Given that FGF21 attenuates acute myocardial infarction in mice (14), it is possible that lower FGF21 levels increase the risk of MACE in patients with MI after CABG surgery, and measurement of FGF21 has a potential clinical value for distinguishing the high risk of MACE in patients with MI who have undergone CABG. Here, FGF21 is linked to myocardial infarction.