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Small Dense Low-Density Lipoprotein Cholesterol and Cardiovascular Risk in Statin-Treated Patients with Coronary

Junnichi Ishii1, Kosuke Kashiwabara2, Yukio Ozaki3

  • 1Department of Clinical Laboratory, Bantane Hospital, Fujita Health University School of Medicine.

Journal of Atherosclerosis and Thrombosis
|December 9, 2021
PubMed

Insights

Small dense low-density cholesterol (sdLDL-C) is linked to cardiovascular risk in statin-treated patients. High-dose statin therapy effectively lowers this risk for individuals with the highest sdLDL-C levels.

Area of Science:

  • Cardiology
  • Lipid Metabolism
  • Pharmacotherapy

Background:

  • Small dense low-density cholesterol (sdLDL-C) is an independent risk factor for cardiovascular disease.
  • Statin therapy is a cornerstone in managing coronary artery disease (CAD), but its effectiveness may vary based on lipid profiles.

Purpose of the Study:

  • To investigate the association between sdLDL-C levels and the risk of major adverse cardiovascular events (MACE) in patients with stable CAD receiving high- or low-dose statin therapy.
  • To determine if high-dose statin therapy offers differential benefits in reducing MACE based on baseline sdLDL-C levels.

Main Methods:

  • A prospective case-cohort study was conducted within the REAL-CAD randomized trial.
  • Serum sdLDL-C was measured at baseline and 6 months in 497 MACE cases and 1543 randomly selected participants.
  • Patients received either high-dose (4 mg/d) or low-dose (1 mg/d) pitavastatin.

Main Results:

  • High-dose pitavastatin significantly reduced sdLDL-C compared to low-dose therapy.
  • In patients on low-dose statins, higher baseline sdLDL-C was associated with increased MACE risk, independent of LDL-C.
  • High-dose statins reduced MACE risk by 46% in the highest sdLDL-C quartile but increased risk in the lowest quartile, indicating a significant interaction.

Conclusions:

  • sdLDL-C is a significant predictor of cardiovascular risk in statin-treated CAD patients, independent of LDL-C.
  • High-dose statin therapy mitigates cardiovascular risk in patients with elevated baseline sdLDL-C.
  • The findings highlight the importance of assessing sdLDL-C for personalized statin therapy selection in CAD patients.
Abstract

Keywords:
Coronary artery diseaseSecondary preventionSmall dense LDL cholesterolStatin therapy

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