omega 3 fatty acids don't do anything, page-6

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