【Objective】 To explore the possibility and meaning of micro RNA-1(mi R-1) as a marker of myocardial injury for the diagnosis of acute myocardial infarction(AMI).【Methods】 The study included 49 patients in the group of AMI, while 49 patients in the normal control group. The blood samples were collected at different time points including the time of admission to hospital(T0), 8 h(T8), 12 h(T12), 24 h(T24), 7 days(7 d) and 14 days(14 d) after the onset of AMI. Real-time quantitative PCR method was used to dete...