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What is the Optimal Low-Density Lipoprotein Cholesterol?

Andrew Gagel1, Fawzi Zghyer1, Christeen Samuel2

  • 1Johns Hopkins University School of Medicine, 1830 E Monument Street, Baltimore, MD 21287, USA.

The Medical Clinics of North America
|March 1, 2022
PubMed

Insights

Lowering low-density lipoprotein cholesterol (LDL-C) over the long term reduces cardiovascular risk. New therapies effectively lower LDL-C, but the lowest beneficial level remains unidentified.

Area of Science:

  • Cardiovascular Medicine
  • Lipidology
  • Pharmacology

Background:

  • Atherosclerotic plaque burden correlates with cumulative exposure to low-density lipoprotein cholesterol (LDL-C) and other apoB-containing lipoproteins.
  • Long-term exposure to lower LDL-C levels is linked to reduced cardiovascular event risk compared to shorter durations.
  • Novel lipid-lowering agents achieve unprecedented LDL-C reductions, demonstrating efficacy in primary and secondary prevention.

Purpose of the Study:

  • To review the relationship between LDL-C exposure and atherosclerotic cardiovascular disease.
  • To evaluate the impact of new lipid-lowering agents on cardiovascular risk.
  • To identify the threshold for LDL-C reduction beyond which no further clinical benefit is observed.

Main Methods:

  • Literature review of studies on lipid-lowering therapies and cardiovascular outcomes.
  • Analysis of data from clinical trials investigating novel lipid-reducing agents.
  • Examination of epidemiological data linking LDL-C levels to cardiovascular disease progression.

Main Results:

  • Cumulative LDL-C exposure is a key determinant of atherosclerotic plaque burden.
  • Sustained lower LDL-C levels significantly decrease cardiovascular event rates.
  • Emerging lipid-lowering drugs effectively reduce LDL-C to very low levels, improving safety and efficacy profiles.
  • No definitive LDL-C threshold has been established below which no additional clinical benefit occurs.

Conclusions:

  • Long-term management of LDL-C is crucial for reducing atherosclerotic cardiovascular disease.
  • New pharmacological interventions offer significant potential for cardiovascular risk reduction.
  • Further research is needed to determine the optimal LDL-C targets for various patient populations.

Keywords:
Atherosclerotic cardiovascular disease (ASCVD)Cerebrovascular accident (CVA)Low-density lipoprotein cholesterol (LDL-C)Peripheral arterial disease (PAD)

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