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My friend reports chest pains every now and then, about once every 2 days. The pain is sharp, but lasts for only 30 seconds or so. He reports that the heart beats "through the rib cage" while this occurs, and it is most frequent when he lies down on his left side. Is it possible that he is having a minor heart attack every 2 days? I ruled this out, because it really does not seem feasible to me, but I don't know much about this. Does anybody have any similar experiences, or some tips to help him out?