n-3 fatty acids in the prevention of cardiac arrhythmias
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Updated: Aug 9, 2026

Testing the Efficacy of Pharmacological Agents in a Pericardial Target Delivery Model in the Swine
Published on: July 7, 2016
1Department of Medicine, Massachusetts General Hospital, Charlestown, 02129, USA.
Abstract:
In animals and probably in humans n-3 polyunsaturated fatty acids (PUFA) are antiarrhythmic. A report follows on the recent studies of the antiarrhythmic actions of PUFA. The PUFA stabilize the electrical activity of isolated cardiac myocytes by inhibiting sarcolemmal ion channels, so that a stronger electrical stimulus is required to elicit an action potential and the relative refractory period is markedly prolonged. This appears at present to be the probable major antiarrhythmic mechanism of PUFA.
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