Small LDL subclass particles cause plaque buildup to progress much faster because they enter the artery wall more easily than large LDL particles. A predominance of smaller LDL particles, referred to as Pattern B lipid phenotype, represents an atherogenic lipid profile that is associated with CVD.
Small LDL particles are typically seen in people with elevated triglyceride levels and decreased HDL-C levels (i.e. people with the metabolic syndrome, obese patients, patients with diabetes). Numerous studies have documented a link between small dense LDL particles and an increased risk of ASCVD (=Atherosclerotic cardiovascular disease).
References:
Feingold KR, Grunfeld C. Utility of Advanced Lipoprotein Testing in Clinical Practice. [Updated 2019 Nov 5]. In: Feingold KR, Anawalt B, Boyce A, et al., editors. Endotext [Internet]. South Dartmouth (MA): MDText.com, Inc.; 2000-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK355893/
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