This was not reduced by an olive oil (monounsaturated fat) diet. It was reduced some 70% in rats fed safflower seed oil. But the group receiving tuna fish oil (rich in n-3 PUFAs) had no arrhythmic deaths. These investigators also reported a similar antiarrhythmic action of the n-3 PUFAs in nonhuman primates. Since then others have repeated their findings in rats. When we learned about their results, I realized their findings were potentially very important, so we decided to see if we could confirm their surprising findings.