Cardiovascular risk and the omega-3 index

Area of Science:

• Cardiology
• Nutritional Science
• Biomarkers

Background:

• Sudden cardiac death (SCD) remains a significant public health concern with undefined reliable risk factors for the general population.
• The omega-3 index, representing red blood cell membrane concentrations of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), is proposed as a key indicator.

Purpose of the Study:

• To establish the omega-3 index as a reliable risk factor for sudden cardiac death (SCD).
• To evaluate the omega-3 index's utility in assessing SCD risk and monitoring EPA + DHA therapy.

Main Methods:

• The study defines the omega-3 index as the combined percentage of EPA and DHA in red blood cell membranes.
• It references epidemiological data showing a dose-dependent relationship between omega-3 index levels and SCD risk.
• Standardized laboratory procedures for omega-3 index determination are highlighted.

Main Results:

• A steep inverse relationship exists between the omega-3 index and SCD risk, observed between 6.5% and 3.3%.
• EPA + DHA demonstrate antiarrhythmic properties at both supraventricular and ventricular levels.
• Dietary intake of EPA + DHA is linked to reduced SCD incidence.

Conclusions:

• The omega-3 index is a reliable and favorably comparable risk factor for sudden cardiac death (SCD).
• It serves as a valuable tool for assessing individual SCD risk and monitoring the effectiveness of EPA + DHA supplementation.
• Current cardiac society guidelines recommend EPA + DHA for SCD prevention.