Key result
Omega-3 PUFA supplementation shows inconsistent effects on heart rate variability and cardiac autonomic control.
Why the study?
The relationship between omega-3 PUFA supplementation and heart rate variability as a marker of cardiac autonomic control and sudden cardiac death risk is not consistent and requires further research.
Does Omega-3 polyunsaturated fatty acids (PUFA) supplementation improve Heart rate variability (HRV) in various patient populations?
Does Omega-3 polyunsaturated fatty acids (PUFA) supplementation improve Heart rate variability (HRV) in various patient populations?
Omega-3 PUFA supplementation may increase heart rate variability, offering a potential mechanism for protection against sudden cardiac death, but further research is needed due to inconsistent results.
May support HRV benefit from omega-3 PUFA; leaves open consistent efficacy pending prospective trials.
Omega-3 polyunsaturated fatty acids (PUFA) may modulate autonomic control of the heart because omega-3 PUFA is abundant in the brain and other nervous tissue as well as in cardiac tissue. This might partly explain why omega-3 PUFA offer some protection against sudden cardiac death (SCD). The autonomic nervous system is involved in the pathogenesis of SCD. Heart rate variability (HRV) can be used as a non-invasive marker of cardiac autonomic control and a low HRV is a predictor for SCD and arrhythmic events. Studies on HRV and omega-3 PUFA have been performed in several populations such as patients with ischemic heart disease, patients with diabetes mellitus, patients with chronic renal failure, and in healthy subjects as well as in children. The studies have demonstrated a positive association between cellular content of omega-3 PUFA and HRV and supplementation with omega-3 PUFA seems to increase HRV which could be a possible explanation for decreased risk of arrhythmic events and SCD sometimes observed after omega-3 PUFA supplementation. However, the results are not consistent and further research is needed.
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Jeppe Hagstrup Christensen (2011) conducted a review in Sudden cardiac death and arrhythmias. Omega-3 polyunsaturated fatty acids was evaluated on Heart rate variability (HRV). Omega-3 polyunsaturated fatty acids may beneficially modulate cardiac autonomic control and increase heart rate variability, though results across trials remain inconsistent.
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