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Lipoprotein(a) and risk of subsequent Stanford type A aortic dissection in patients with acute coronary syndrome: a

Zishuang Dong1, Yanqi Wang1, Sibo Wang2

  • 1Department of Cardiovascular Medicine, Xuzhou Central Hospital, Southeast University, Xuzhou, Jiangsu, 221009, China.

Nutrition, Metabolism, and Cardiovascular Diseases : NMCD
|August 20, 2026
PubMed

Insights

High Lipoprotein(a) [Lp(a)] levels after acute coronary syndrome (ACS) predict type A aortic dissection (AD). Lp(a) improves cardiovascular risk stratification and may have causal links to aortic aneurysm.

Area of Science:

  • Cardiovascular Medicine
  • Genetics
  • Aortic Diseases

Background:

  • Lipoprotein(a) [Lp(a)] is a known cardiovascular risk factor.
  • The association between Lp(a) and Stanford type A aortic dissection (AD) following acute coronary syndrome (ACS) is not well-established.

Purpose of the Study:

  • To investigate if Lp(a) levels at ACS presentation predict subsequent type A AD.
  • To assess the incremental predictive value of Lp(a) for type A AD.
  • To explore potential causal relationships between Lp(a) and type A AD using Mendelian randomization (MR).

Main Methods:

  • A bi-center retrospective case-control study included 222 patients with type A AD post-ACS and 751 ACS controls.
  • Overlap weighting balanced covariates; Lp(a) analyzed by log-transformation, tertiles, and a threshold of >125 nmol/L.
  • Two-sample Mendelian randomization (MR) analysis used 45 instruments, adjusting for LDL-C and systolic blood pressure.

Main Results:

  • Lp(a) levels were significantly higher in type A AD cases compared to controls (P < 0.001).
  • Each log-unit increase in Lp(a) was associated with increased type A AD risk (OR 5.14).
  • Higher Lp(a) tertiles and levels >125 nmol/L also showed increased risk, and adding Lp(a) improved risk discrimination (AUC 0.820 vs 0.697).
  • MR analysis supported associations between Lp(a) and aortic aneurysm and a composite outcome, independent of LDL-C and blood pressure.

Conclusions:

  • Elevated Lp(a) at ACS presentation is a predictor of type A AD.
  • Lp(a) enhances risk stratification for type A AD in ACS patients.
  • Genetic analysis suggests a link between Lp(a) and aortic aneurysm, though evidence for dissection was limited by statistical power.
Abstract

Keywords:
Acute coronary syndromeLipoprotein(a)Mendelian randomizationRisk predictionStanford type A aortic dissection

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