Abstract
Sudden cardiac death (SCD) is usually due to ventricular fibrillation and can occur as a first manifestation of heart disease. Prevention of ventricular fibrillation and SCD with n − 3 polyunsaturated fatty acids is well documented. Trans-fatty acids (TFA) in the diet and cell membranes might affect the risk of SCD as well. We review evidence from an observational study that high levels of trans-18:2 (9 cis-, 12 trans- and 9 trans-, 12 cis-isomers of linoleic acid) in red blood cell membranes are associated with markedly higher risk of SCD. In contrast, cell membrane levels of trans-18:1 ( trans-isomers of oleic acid), the major TFA in foods, do not appear associated with higher risk of SCD. While further studies are needed to investigate possible effects of trans-18:2 on arrhythmia, it would be prudent to limit dietary intake of trans-18:2.
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