Vol 26, No 2 (2019)
Original articles — Clinical cardiology
Published online: 2018-03-02

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Predictive and protective role of high-density lipoprotein cholesterol in acute myocardial infarction

Jin Sup Park12, Kwang Soo Cha12, Hye Won Lee1, Jun-Hyok Oh1, Jung Hyun Choi1, Han Cheol Lee1, Taek Jong Hong1, Myung Ho Jeong3, Shung Chull Chae4, Young Jo Kim5
Pubmed: 29512093
Cardiol J 2019;26(2):176-185.

Abstract

Background: It is unclear whether high-density lipoprotein cholesterol (HDL-C) level predicts cardiovascular events and has a protective effect in patients with acute myocardial infarction (AMI) undergo- ing percutaneous coronary intervention (PCI) and statin treatment.

Methods: A total of 15,290 AMI patients receiving statins were selected from the Korean Myocardial Infarction Registry. Baseline HDL-C level was used to identify patients with low (group A), normal (group B), and high (group C) HDL-C levels according to the Adult Treatment Panel III criteria. Clinical outcomes were compared in propensity-adjusted and matched cohorts. The primary endpoint was a composite of cardiovascular death and recurrent myocardial infarction. 

Results: At the median follow-up of 11.5 months, the primary endpoint occurred in 2.7% (112/4098), 1.4% (54/3910), and 1.2% (8/661) of patients in groups A, B, and C, respectively. In the propensity- -adjusted cohort, low HDL-C level increased the risk of primary endpoint (hazard ratio [HR] 1.755, 95% confidence interval [CI] 1.274–2.417, p = 0.001), whereas high HDL-C level did not reduce this risk (HR 0.562, 95% CI 0.275–1.146, p = 0.113). In the propensity-matched cohort, low HDL-C level increased the risk of primary endpoint (HR 1.716, 95% CI 1.210–2.434, p = 0.002), whereas high HDL-C level reduced this risk (HR 0.449, 95% CI 0.214–0.946, p = 0.035). 

Conclusions: In AMI patients treated with PCI and statins, low HDL-C level increases the risk of cardiovascular death and recurrent myocardial infarction, whereas high HDL-C level likely reduces the risk of cardiovascular events, especially for ST-elevation myocardial infarction. 

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