Key result
Omega-3 fatty acids reduce resting heart rate by decreasing membrane electrical excitability of cardiac myocytes through the inhibition of ion channels.
Why the study?
Do omega-3 fatty acids reduce heart rate and membrane electrical excitability in humans and animals?
Do omega-3 fatty acids reduce heart rate and membrane electrical excitability in humans and animals?
Omega-3 fatty acids directly reduce heart rate by inhibiting cardiac ion channels and decreasing membrane electrical excitability, providing a mechanistic basis for their protective effects against sudden cardiac death.
Hypothesis-generating for omega-3 effects on heart rate; extends mechanistic data but should not yet change practice.
An elevated resting heart rate is one of the strongest predictors of cardiovascular mortality and is independently associated with sudden cardiac death (SCD). Agents capable of reducing heart rate without significant side effects are therefore of particular interest for the prevention of SCD. Recent human and animal studies have shown that omega-3 fatty acids can reduce heart rate. Our work has shown that omega-3 fatty acids significantly reduce membrane electrical excitability of the cardiac myocyte by lowering its resting membrane potential and the duration of the refractory period through inhibition of ion channels. We propose that these actions may be the underlying mechanisms for the omega-3 fatty acid-induced reduction of heart rate observed in both humans and animals. The heart rate-lowering capability of omega-3 fatty acids may contribute to their preventive effect against SCD.
No takes yet. Share an insight, caveat, or question.
Jing X. Kang (2012) conducted a review in Elevated resting heart rate and sudden cardiac death. Omega-3 fatty acids (EPA and DHA) was evaluated. Omega-3 fatty acids reduce resting heart rate by decreasing membrane electrical excitability of cardiac myocytes through the inhibition of ion channels.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: