Very much so..... sometimes people have small ones and not even know it. They think it is heartburn
. The only time people fall down and die from heart attacks are when they have big ones and there is a huge blockage or their is a blood clot at causes even more problems..... anyways to answer your question... yes people can, and your friend should see his doctor and get an EKG done just to be on the safe side. The risk of another one is high if gone without treatment.