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Impairment of endothelial function after a high-fat meal in patients with coronary artery disease

S P Zhao1, L Liu, M Gao

  • 1Department of Cardiology, Second Affiliated Hospital of Central South University, Changsha, China.

Coronary Artery Disease
|November 21, 2001
PubMed

Insights

A high-fat meal impairs endothelial function, particularly in coronary artery disease (CAD) patients. Postprandial lipid changes, especially triglycerides, are linked to this endothelial dysfunction, suggesting a role in atherosclerosis.

Area of Science:

  • Cardiovascular Medicine
  • Endocrinology
  • Lipid Metabolism

Background:

  • Endothelial dysfunction is a key factor in coronary artery disease (CAD) pathogenesis.
  • Postprandial lipid excursions following a high-fat meal can impact vascular health.
  • Normocholesterolemic individuals may still experience adverse effects from postprandial dyslipidemia.

Purpose of the Study:

  • To investigate the impact of postprandial lipid changes on endothelial function in CAD patients.
  • To compare the effects of a high-fat meal on endothelial function in CAD patients versus healthy controls.
  • To explore the relationship between triglyceride levels and endothelial function after a meal.

Main Methods:

  • Study included 50 CAD patients and 25 normocholesterolemic controls.
  • High-resolution ultrasound assessed brachial artery flow-mediated vasodilatation (FMD).
  • FMD was measured before and after a standardized high-fat meal (800 calories, 50g fat).

Main Results:

  • Postprandial serum triglyceride levels significantly increased 2-7 hours after the meal.
  • Mean FMD was significantly impaired in both CAD patients and controls post-meal.
  • The impairment in FMD was more pronounced in CAD patients compared to controls (44.4% vs 25.9%).
  • Increased 2-hour triglyceride levels correlated with reduced FMD.

Conclusions:

  • A single high-fat meal severely impairs endothelium-dependent vasodilatation in both CAD patients and controls.
  • Disordered postprandial metabolism of triglyceride-rich lipoproteins may contribute to endothelial dysfunction.
  • This dysfunction could play an atherogenic role in the progression of cardiovascular disease.
Abstract

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