The serum cTnI concentrations of the AMI group at 1, 2, 4 and 4 h after surgery were not significantly correlated with the myocardial infarct range (r=–0.07, P>0.05; r=–0.05, P>0.05; r=–0.09, P>0.05; and r=–0.05, P>0.05, respectively). The gene discussed is TNNI3; the disease is myocardial infarction.