you also need to read the article in its context..the study was...

you also need to read the article in its context..the study was done on patients already affected by stroke or heart attacks..its conclusion is:
" omega-3 PUFAs are not statistically significantly associated with major cardiovascular outcomes across patient populations," the authors wrote. "Our findings do not justify the use of omega-3 as a structured intervention in everyday clinical practice or guidelines supporting dietary omega-3 PUFA administration."

Omega 3 is a preventative natural supplement not a cure for patients already suffering from the disease. As other resarch states if taken regularly your chances of suffering from a stroke or heart attack is significantly reduced from occuring in the first place