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The clinical outcome of patients with ST elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention (PCI), with or without achievement of low-density lipoprotein cholesterol (LDL-C) targets, has rarely been investigated. This study was performed to investigate the comparison of clinical outcome in STEMI patients with or without achievement LDL-C targets (below 70 mg/dL and/or ≥50% reduction). Between November 2013 and December 2016, 689 STEMI patients underwent primary PCI in our hospital. Patients who were deceased, lost to follow-up, had no follow-up lipid profile, or had no side effects after statin use were excluded. A total of 343 patients were classified into group 1 (with LDL-C target achievement) and 172 patients were classified into group 2 (without LDL-C target achievement). Between the two groups, a higher prevalence of left main coronary artery disease, smaller pre-PCI stenosis, and a larger pre-PCI minimal luminal diameter were noted in group 2. The incidence of post-MI angina (8.7% vs. 6.4%; p = 0.393), target vessel revascularization (2.3% vs. 3.5%; p = 0.566), and recurrent MI (1.5% vs. 1.2%; p = 1.000), showed similar results between the two groups during a one-year follow-up period. Initial LDL-C levels ≥130 mg/dL, left main coronary artery disease, and absence of diabetes mellitus were positively associated with non-achievement of LDL-C targets. After STEMI, 66.6% of patients could achieve LDL-C targets one year later. However, such patients did not show better clinical outcomes. Non-DM, initial LDL-C levels ≥130 mg/dL, and left main coronary artery disease were related to non-achievement of LDL-C targets.

The Clinical Outcomes Based on the Achievement of Low-Density Lipoprotein Cholesterol Targets after ST Elevation Myocardial Infarction