Abstract:Objective To explore the correlation analysis of different Hb levels in Tibetan plateau region on recent (in-hospital) major adverse cardiovascular events (MACE) of acute ST-segment elevation myocardial infarction (STEMI).Methods Clinical data of STEMI patients admitted to the department of cardiovascular internal medicine of Tibet autonomous region people's hospital from October 2013 to October 2018 were retrospectively analyzed. According to Hb level, they were divided into normal group (110 cases in total, male 120 ≤ Hb ≤160 g/L, female 110 ≤ Hb ≤150 g/L), higher group (69 cases in total, male 160 < HB < 180 g/L, female 150 < HB < 180 g/L), and extremely high group (121 cases in total, male/female Hb ≥180 g/L,). The incidence and correlation of recent MACE in the 3 groups were analyzed.Results Compared with the other two groups, the extremely high group had a higher incidence rate of younger age, smoking, and drinking history (P < 0.05), The levels of leukocyte, uric acid, and albumin were higher (P < 0.05), and the values of low density lipoprotein and D- dimer were lower than those of the other two groups (P < 0.05) and the normal group had a higher incidence rate of grade Ⅲ-Ⅳ in Killip classification (P < 0.05). There was no significant difference in hospital stay and MACEs incidence among the three groups (P > 0.05). Multivariate Cox stepwise regression showed that after adjusting for other factors, CAMI-STEMI score [R = 1.165, (95% CI: 1.007, 1.347), P = 0.040], and TIMI score [R = 0.861, (95% CI: 0.755, 0.980), P = 0.024] were independent predictors of MACE incidence in hospital.Conclusion High hemoglobin level has no correlation with recent (in-hospital) adverse cardiovascular events, and whether long-term cardiovascular risks have correlation needs further discussion. CAMI-STEMI score and TIMI score are independent predictors of MACE incidence in STEMI patients in Tibet plateau.