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on behalf of KAMIR-NIH registry investigators,Park, K.H.,Jeong, M.H.,Ahn, Y.,Ahn, T.H.,Seung, K.B.,Oh, D.J.,Choi, D.J.,Kim, H.S.,Gwon, H.C.,Seong, I.W.,Hwang, K.K.,Chae, S.C.,Kim, K.B.,Kim, Y.J.,Cha, Elsevier/North-Holland Biomedical Press 2016 INTERNATIONAL JOURNAL OF CARDIOLOGY Vol.215 No.-
<P>Background: Although ticagrelor has been well-known to improve clinical outcomes in patients with acute myocardial infarction (AMI) without increased bleeding risk, its clinical impacts have not been well established in East Asian patients. Methods: Between November 2011 and June 2015, a total of 8010 patients (1377 patients were prescribed ticagrelor and 6633 patients clopidogrel) undergoing successful revascularization were analyzed from Korea Acute Myocardial Infarction Registry-National Institute of Health. The patients who discontinued or occurred in-hospital switching between two antiplatelet agents were excluded. Results: After propensity score matching (1377 pairs), no difference in the composite of cardiac death, MI, stroke, or target vessel revascularization at 6 months was observed between two groups (4.2% vs. 4.9%, p = 0.499). However, the incidences of in-hospital Thrombolysis In Myocardial Infarction (TIMI) major and minor bleeding were higher in ticagrelor than clopidogrel (2.6% vs. 1.2%, p = 0.008; 3.8% vs. 2.5%, p = 0.051). The in-hospital mortality was higher in patients with than those without TIMI major bleeding (11.3% vs. 0.9%, p < 0.001). In a subgroup analysis, a higher risk for in-hospital TIMI major bleeding with ticagrelor was observed in patients = 75 years or with body weight < 60 kg (odd ratio [OR] = 3.209; 95% confidence interval [CI] = 1.356-7.592) and in those received trans-femoral intervention (OR = 1.996; 95% CI = 1.061-3.754). Conclusions: Our study shows that ticagrelor did not reduce ischemic events yet, however, was associated with increased risk of bleeding complications compared with clopidogrel. Further large-scale, long-term, randomized trials should be required to assess the outcomes of ticagrelor for East Asian patients with AMI. (C) 2016 Elsevier Ireland Ltd. All rights reserved.</P>