Classification, prevalence and cardiovascular risk of different types of hypercholesterolemia

Fernando Civeira1, Estíbaliz Jarauta1, Victoria Marco-Benedí1

  • 1Unidad de Lípidos, Hospital Universitario Miguel Servet, IIS Aragón, Zaragoza, Spain; Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, Madrid, Spain; Departamento de Medicina, Psiquiatría y Dermatología, Universidad de Zaragoza, Zaragoza, Spain.

Insights

Genetic hypercholesterolemia, particularly with elevated lipoprotein(a), leads to a worse atherosclerotic cardiovascular disease (ASCVD) prognosis. Treatment effectiveness for low-density lipoprotein cholesterol may be reduced in hyperlipoproteinemia(a).

Area of Science:

  • Cardiology
  • Genetics
  • Metabolic Disorders

Background:

  • The clinical characteristics and atherosclerotic cardiovascular disease (ASCVD) risk associated with different types of hypercholesterolemia are not fully understood.
  • Determining the cause of hypercholesterolemia is crucial for assessing ASCVD prognosis.

Purpose of the Study:

  • To investigate the frequency, clinical features, and ASCVD risk across various hypercholesterolemia types.
  • To ascertain if the underlying cause of hypercholesterolemia influences ASCVD outcomes.

Main Methods:

  • Analysis of 3474 probands with primary hypercholesterolemia, followed for ASCVD.
  • Classification of hypercholesterolemia using genetic analysis (familial hypercholesterolemia genes), polygenic risk scores, and lipid levels (including lipoprotein(a)).

Main Results:

  • Heterozygous familial hypercholesterolemia (FH) showed higher baseline low-density lipoprotein cholesterol; hyperlipoproteinemia(a) had a higher ASCVD prevalence.
  • Participants with hyperlipoproteinemia(a) had a significantly lower survival rate compared to other groups.
  • ASCVD events were independently associated with age, male sex, baseline ASCVD/diabetes/hypertension, smoking, lipoprotein(a), and high-density lipoprotein cholesterol.

Conclusions:

  • Genetic hypercholesterolemia confers a poorer ASCVD prognosis than non-genetic forms.
  • Elevated lipoprotein(a) in genetic hypercholesterolemia is linked to the worst ASCVD prognosis.
  • Standard lipid-lowering therapies may be less effective for hyperlipoproteinemia(a)-associated hypercholesterolemia.
Abstract

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