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Published on: November 10, 2017
Thinking beyond low-density lipoprotein cholesterol: strategies to further reduce cardiovascular risk
Rakesh K Sharma1, Vibhuti N Singh, Hanumanth K Reddy
1Medical Center of South Arkansas, El Dorado, University of Arkansas for Medical Sciences, Little Rock, AR, USA. rk1965@gmail.com
Insights
Statin therapy lowers LDL cholesterol but residual cardiovascular risk remains. Low HDL cholesterol and high triglycerides contribute significantly to this risk, impacting heart health.
Area of Science:
- Cardiology
- Lipid Metabolism
- Atherosclerosis Research
Background:
- Statin trials confirm LDL-C reduction benefits, yet residual cardiovascular risk persists.
- Low high-density lipoprotein cholesterol (HDL-C) and high triglycerides (TG) are key contributors to this residual risk.
- NCEP ATP III guidelines identify low HDL-C as an independent risk factor for coronary heart disease (CHD).
Purpose of the Study:
- To explore the role of HDL-C and TG in residual cardiovascular risk.
- To highlight the anti-atherogenic mechanisms of HDL-C.
- To emphasize the clinical significance of non-HDL-C and TG reduction.
Main Methods:
- Review of large statin trials and meta-analyses.
- Analysis of epidemiological studies on HDL-C and CHD.
- Examination of the relationship between TG, HDL-C, non-HDL-C, and cardiovascular outcomes.
Main Results:
- Statin therapy effectively reduces LDL-C but does not eliminate all cardiovascular risk.
- Low HDL-C and high TG are independently associated with increased CHD risk.
- HDL-C possesses anti-atherogenic properties, including cholesterol efflux from foam cells.
- Non-HDL-C serves as an indicator for residual risk associated with high TG.
Conclusions:
- Addressing low HDL-C and high TG is crucial for managing residual cardiovascular risk.
- Therapeutic strategies targeting HDL-C and TG can further reduce cardiovascular events.
- Monitoring non-HDL-C provides valuable insight into comprehensive lipid management.
Abstract:
Several large statin trials and meta-analyses have demonstrated a reduction in low-density lipoprotein cholesterol (LDL-C) and cardiovascular morbidity and mortality. Some trials have also highlighted the significance of residual cardiovascular risk after treatment of LDL-C to target levels. This reflects the complex nature of residual cardiovascular risk. This residual risk is partially due to low HDL-C and high triglycerides (TG) despite achievement of LDL goals with statin therapy. The NCEP ATP III guidelines reported that low HDL-C is a significant and an independent risk factor for coronary heart disease (CHD) and is inversely related to CHD. Epidemiologic studies have also shown a similar inverse relationship of HDL-C with CHD. High-density lipoprotein cholesterol (HDL-C) may directly participate in the anti-atherogenic process by promoting efflux of cholesterol of the foam cells of atherogenic lesions. Many studies have demonstrated multiple anti-atherogenic actions of HDL-C and its role in promoting efflux of cholesterol from the foam cells. The residual risk by increased TG with or without low HDL-C can be assessed by calculating non-HDL-C and a reduction in TG results in decreased CHD.
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