Abstract: ［Abstract］〓Objective〖HTSS〗〓To explore the clinical and coronary angiography features in patients with premature myocardial infarction(pMI)．
〖HTH〗〖WTHZ〗Methods〖HTSS〗〓One hundred and fiftynine patients with premature STsegment elevation myocardial infarction(pMI group) and 190 patients with nonpremature STsegment elevation myocardial infarction(nonpMI group) were collected. General data, laboratory examination results, coronary angiography results and hospital complications of the two groups were compared.
〖HTH〗〖WTHZ〗Results〖HTSS〗〓In the pMI group, the proportion of males, BMI, smoking, family history of earlyonset coronary heart disease, hyperlipidemia, diastolic blood pressure on admission, and cardiac function grade 2 or above was higher than that in the nonpMI group. In the pMI group, the proportion of hypertension, diabetes, stroke, kidney disease and anemia was lower than that in the nonpMI group. The levels of LDLC, total cholesterol, triglyceride and nonHDLC in the pMI group were all higher than those in the nonpMI group. The hemoglobin level in the pMI group was higher than that in the nonpMI group, and the serum creatinine and blood glucose levels were lower than that in the nonpMI group. The proportion of patients in the pMI group receiving coronary angiography and emergency PCI during hospitalization was higher than that in the nonpMI group. The left anterior descending artery was the most common infarctrelated vessel in the pMI group, which was higher than that in the nonpMI group. The proportion of single coronary artery involvement was higher in the pMI group. In the lesion site, the involvement of left main artery and right coronary artery was higher in the nonpMI group. The incidence of serious complications and mortality in the pMI group were lower than those in the nonpMI group.
〖HTH〗〖WTHZ〗Conclusion〖HTSS〗〓The proportion of male, smoking, family history of early onset coronary heart disease, BMI and blood lipid levels of the patients with pMI were all higher than the nonpMI patients. Left anterior descending arterys were the most common infarctrelated vasculars in pMI patients. The serious complications and mortality in hospital in pMI patients were lower than those in nonpMI patients.

Key words: myocardial infarction, disease attributes, coronary arteries