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Fish oils in cardiovascular disease.

G A Fitzgerald1, G Braden, D J Fitzgerald

  • 1Division of Clinical Pharmacology, Vanderbilt University, Nashville, Tennessee.

Journal of Internal Medicine. Supplement
|January 1, 1989
PubMed
Summary

Omega-3 fatty acids from fish oil may lower blood pressure in hypertensives. While their role in preventing coronary heart disease is debated, they show potential in cardiovascular health.

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Area of Science:

  • Cardiovascular Science
  • Nutritional Epidemiology
  • Pharmacology

Background:

  • Studies suggest fish intake correlates with lower coronary heart disease mortality.
  • The specific role of omega-3 fatty acids versus general dietary changes remains unclear.
  • Omega-3s can alter platelet function by replacing thromboxane A2 with thromboxane A3.

Purpose of the Study:

  • To investigate the cardiovascular effects of omega-3 fatty acids.
  • To clarify whether observed benefits are due to omega-3s or other dietary factors.
  • To assess the impact of omega-3 fatty acids on blood pressure and vascular responses.

Main Methods:

  • Review of studies on fish intake and coronary heart disease.
  • Analysis of platelet eicosanoid formation.
  • Evaluation of a double-blind, controlled study on omega-3 fatty acids in mild hypertensives.
  • Examination of animal models for vascular proliferative response to injury.

Main Results:

  • Omega-3 fatty acids are inefficient platelet inhibitors.
  • High doses (15 g/day) of omega-3 fatty acids significantly reduced blood pressure in mild hypertensives.
  • Fish oils inhibit vascular proliferation in animal models, independent of lipoprotein effects.
  • Evidence suggests interference with vascular expression of mitogenic peptides.

Conclusions:

  • Omega-3 fatty acids demonstrate a blood pressure-lowering effect in mild hypertension.
  • Their direct impact on coronary heart disease prevention requires further investigation.
  • Fish oils may have therapeutic potential in vascular conditions beyond platelet inhibition.

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