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  • Title: Serum apolipoprotein E levels predict residual cardiovascular risk in patients with chronic coronary syndrome undergoing first percutaneous coronary intervention and on-statin treatment.
    Author: Fukase T, Dohi T, Chikata Y, Takahashi N, Endo H, Doi S, Nishiyama H, Kato Y, Okai I, Iwata H, Okazaki S, Isoda K, Miyauchi K, Daida H, Minamino T.
    Journal: Atherosclerosis; 2021 Sep; 333():9-15. PubMed ID: 34418683.
    Abstract:
    BACKGROUND AND AIMS: Little is known about the long-term impact of apolipoprotein E (apoE) on residual cardiovascular risk in patients with chronic coronary syndrome (CCS) receiving statin treatment. METHODS: A total of 1109 consecutive patients (mean age, 67 ± 10 years; 83% men) with CCS who underwent their first intervention between 2000 and 2016 were included in this study. All patients had achieved low-density lipoprotein cholesterol (LDL-C) <100 mg/dL on statin treatment and were divided into two groups based on median serum apoE values. We evaluated the incidence of major adverse cardiovascular events (MACEs), including cardiovascular death, non-fatal acute coronary syndrome, and target vessel revascularization. RESULTS: A total of 552 and 557 patients were categorized to the higher and lower apoE groups, respectively. There were significant relationships between apoE levels and total cholesterol levels, triglyceride levels, high-density lipoprotein cholesterol levels, and estimated remnant cholesterol, except for LDL-C levels. During the median follow-up period of 5.1 years, 195 patients (17.6%) developed MACEs. Kaplan-Meier analysis revealed that the cumulative incidence of MACEs in the higher apoE group was significantly higher than in the lower apoE group (29.5% vs.23.8% log-rank test, p = 0.019). Using multivariable Cox hazard analysis, serum apoE level (1-mg/dL increase) (hazard ratio 1.15; 95% confidence interval 1.03-1.29, p = 0.013) was the strongest independent predictor of MACEs. CONCLUSIONS: Serum apoE level could be a strong predictor of residual cardiovascular risk in patients with CCS long-term, even if LDL-C levels are controlled with statin treatment.
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