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Park, Duk-Woo, MD; Kim, Young-Hak, MD; Yun, Sung-Cheol, PhD; Ahn, Jung-Min, MD; Lee, Jong-Young, MD; Kim, Won-Jang, MD; Kang, Soo-Jin, MD; Lee, Seung-Whan, MD; Lee, Cheol Whan, MD; Park, Seong-Wook, MD; Park, Seung-Jung, MD
The American journal of cardiology, 04/2014, Volume: 113, Issue: 7Journal Article
Periprocedural myocardial infarction (MI) can be induced by several angiographic mechanisms. However, there are limited data on whether these mechanisms differentially affect clinical outcomes. The purpose of our study was to investigate the impact of periprocedural MI on mortality according to the underlying angiographic mechanisms after drug-eluting stent (DES) implantation. We pooled the databases from 7 coronary stent trials using DES. Periprocedural MI was classified according to its underlying angiographic mechanisms as type 1 (due to side-branch occlusion), type 2 (due to other angiographic complications), or type 3 (without angiographically identifiable causes). Among 10,889 patients treated with DES, 768 (7.1%) experienced periprocedural MI; 463 cases (60.3%) were driven by type 1 cause, 138 (18.0%) by type 2 cause, and 167 (21.7%) by type 3 cause. Mortality rates at 2 years were higher in patients with periprocedural MI than in those without (3.5% vs 2.1%, respectively). Significant differences in mortality were observed according to the angiographic mechanisms of MI (type 1: 2.8% vs type 2: 6.1% vs type 3: 3.1%). After multivariable adjustment, type 2 MI was significantly associated with an increased risk of mortality (hazard ratio 2.65, 95% confidence interval 1.77 to 3.96), whereas type 1 and type 3 MI were not related with increased mortality. In conclusion, among patients receiving DES implantation, periprocedural MI was associated with increased mortality, and there were differential associations with mortality according to the underlying angiographic mechanisms.
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