Prevention of Sudden Cardiac Death by Dietary Pure ω-3 Polyunsaturated Fatty Acids in Dogs
Abstract
Background—Rat diets high in fish oil have been shown to be protective against ischemia-induced fatal ventricular arrhythmias. Increasing evidence suggests that this may also apply to humans. To confirm the evidence in animals, we tested a concentrate of the free fish-oil fatty acids and found them to be antiarrhythmic. In this study, we tested the pure free fatty acids of the 2 major dietary ω-3 polyunsaturated fatty acids in fish oil: cis-5,8,11,14,17-eicosapentaenoic acid (C20:5ω-3) and cis-4,7,10,13,16,19-docosahexaenoic acid (C22:6ω-3), and the parent ω-3 fatty acid in some vegetable oils, cis-9,12,15-α-linolenic acid (C18:3ω-3), administered intravenously on albumin or a phospholipid emulsion. Methods and Results—The tests were performed in a dog model of cardiac sudden death. Dogs were prepared with a large anterior wall myocardial infarction produced surgically and an inflatable cuff placed around the left circumflex coronary artery. With the dogs running on a treadmill 1 month after the surgery, occlusion of the left circumflex artery regularly produced ventricular fibrillation in the control tests done 1 week before and after the test, with the ω-3 fatty acids administered intravenously as their pure free fatty acid. With infusion of the eicosapentaenoic acid, 5 of 7 dogs were protected from fatal ventricular arrhythmias (P<0.02). With docosahexaenoic acid, 6 of 8 dogs were protected, and with α-linolenic acid, 6 of 8 dogs were also protected (P<0.004 for each). The before and after control studies performed on the same animal all resulted in fatal ventricular arrhythmias, from which they were defibrillated. Conclusions—These results indicate that purified ω-3 fatty acids can prevent ischemia-induced ventricular fibrillation in this dog model of sudden cardiac death.
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The findings for ALA are mechanistically supported by effects of ALA on thrombosis, inflammation, arrhythmia, and endothelial function.
“Mechanistically, these findings are supported by effects of ALA on thrombosis, inflammation, arrhythmia, and endothelial function.43–47”
From ω-3 Polyunsaturated Fatty Acid Biomarkers and Coronary Heart Disease: Pooling Project of 19 Cohort Studies (2016) · cites this paper as [46]
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- Authors
- Billman, G. E., Kang, J. X., & Leaf, A.
- Affiliations
- Harvard University (US)
- ORCID
- Kang, Jing X.
- Venue
- Circulation
- Published
- 1999-05-11
- Volume
- 99
- Issue
- 18
- Pages
- 2452-2457
- ISSN
- 0009-7322 (ISSN-L)
- 1524-4539
- OpenAlex
- W2055143941
- Cited by
- 393
- References
- 37
- Citations by year
- 2026: 2 · 2025: 1 · 2024: 2 · 2023: 6 · 2021: 4 · 2020: 3 · 2019: 5 · 2018: 7 · 2017: 7 · 2016: 8 · 2015: 2 · 2014: 9 · 2013: 16 · 2012: 19
- FWCI
- 23.06
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Circulation (publishedVersion)
- PubMed (publishedVersion)
- Funders
- American Heart Association
- National Institutes of Health (5r01dk038165-11)
- National Institute of Diabetes and Digestive and Kidney Diseases (DK-38165)
- Topics
- Health Sciences › Nursing › Nutrition and Dietetics › Fatty Acid Research and Health
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
- Health Sciences › Medicine › Pathology and Forensic Medicine › Cardiac Ischemia and Reperfusion
- Keywords
- sudden cardiac death, omega-3 polyunsaturated fatty acids, eicosapentaenoic acid, docosahexaenoic acid, alpha-linolenic acid, ventricular fibrillation, ventricular arrhythmias, myocardial infarction, ischemia, fish oil, dogs, antiarrhythmic effect, phospholipid emulsions
- MeSH terms
- Animals, Anti-Arrhythmia Agents, Docosahexaenoic Acids, Dogs, Fish Oils, Heart Rate, Infusions, Intravenous, Membrane Lipids, Myocardial Infarction, Physical Conditioning, Animal, Plant Oils, Soybean Oil, Ventricular Fibrillation, Eicosapentaenoic Acid, Death, Sudden, Cardiac, alpha-Linolenic Acid
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