Circulating linoleic acid at the time of myocardial infarction and risk of primary ventricular fibrillation.

Abstract

Primary ventricular fibrillation (PVF) is a major driver of cardiac arrest in the acute phase of ST-segment elevation myocardial infarction (STEMI). Enrichment of cardiomyocyte plasma membranes with dietary polyunsaturated fatty acids (PUFA) reduces vulnerability to PVF experimentally, but clinical data are scarce. PUFA status in serum phospholipids is a valid surrogate biomarker of PUFA status in cardiomyocytes within a wide range of dietary PUFA. In this nested case-control study (n = 58 cases of STEMI-driven PVF, n = 116 control non-PVF STEMI patients matched for age, sex, smoking status, dyslipidemia, diabetes mellitus and hypertension) we determined fatty acids in serum phospholipids by gas-chromatography, and assessed differences between cases and controls, applying the Benjamini-Hochberg procedure on nominal P-values to control the false discovery rate (FDR). Significant differences between cases and controls were restricted to linoleic acid (LA), with PVF patients showing a lower level (nominal P = 0.002; FDR-corrected P = 0.027). In a conditional logistic regression model, each one standard deviation increase in the proportion of LA was related to a 42% lower prevalence of PVF (odds ratio = 0.58; 95% confidence interval, 0.37, 0.90; P = 0.02). The association lasted after the inclusion of confounders. Thus, regular consumption of LA-rich foods (nuts, oils from seeds) may protect against ischemia-driven malignant arrhythmias.

• Authors: Teresa Oliveras, Iolanda Lázaro, Ferran Rueda, Germán Cediel, Deepak L Bhatt, Montserrat Fitó, Francisco Madrid-Gambin, Oscar J Pozo, William S Harris, Cosme García-García, Aleix Sala-Vila, Antoni Bayés-Genís
• Journal: Scientific reports (Sci Rep) Vol. 12 Issue 1 Pg. 4377 (03 14 2022) ISSN: 2045-2322 [Electronic] England
• PMID: 35288655 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: © 2022. The Author(s).

Chemical References

• Fatty Acids, Unsaturated
• Phospholipids
• Linoleic Acid

Topics

• Case-Control Studies
• Fatty Acids, Unsaturated
• Humans
• Linoleic Acid
• Myocardial Infarction (epidemiology)
• Phospholipids
• ST Elevation Myocardial Infarction (epidemiology)
• Ventricular Fibrillation