Excessive-Dose Fish Oil Might Increase Odds for A-Fib in Coronary heart Sufferers

By Amy Norton
HealthDay Reporter

MONDAY, Might 3, 2021 (HealthDay Information) — Many individuals take fish oil to guard their coronary heart, however a brand new examine means that prescription variations might increase the danger of a standard coronary heart rhythm dysfunction.

At situation are prescription-strength omega-3 fatty acids, that are naturally present in fish oil. The medicines are sometimes prescribed to folks with very excessive triglycerides, a sort of blood fats linked to elevated danger of coronary heart assault and stroke.

In keeping with the American Coronary heart Affiliation, prescription omega-3s can decrease triglycerides by 20% to 30% in most individuals.

However the medicines are additionally controversial, as a result of their final advantages for the guts are unclear.

Now the brand new examine — an evaluation of 5 previous scientific trials — suggests warning is so as. Total, trial sufferers given omega-3s have been over one-third extra prone to develop atrial fibrillation (a-fib) than these given a placebo. The fish oil doses taken ranged from 0.84 grams to 4 grams per day.


A-fib is a standard coronary heart rhythm dysfunction, or arrhythmia, through which the guts’s higher chambers start to quiver chaotically as a substitute of contracting successfully.

A-fib just isn’t instantly life-threatening, but it surely’s “not benign,” both, stated Dave Dixon, one of many researchers on the examine and an affiliate professor at Virginia Commonwealth College (VCU), in Richmond.

Over time, Dixon stated, a-fib can result in issues like coronary heart failure or stroke.

Precisely how prescription-strength omega-3 might contribute to a-fib is unclear, based on Dixon.

Nevertheless, the elevated danger was pretty constant throughout the trials — extra constant, in reality, than coronary heart advantages have been, stated co-researcher Salvatore Carbone, an assistant professor at VCU.

In all 5 trials, there have been extra a-fib

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