The symptoms of a heart attack are not the same for everyone. Sometimes heart attacks are sudden and excruciating, but often, they start out slow with mild discomfort. According to the National Heart, Lung, and Blood Institute, one study found that one-third of people who had a heart attack had no chest pain. These people were likely to be older, female, or diabetic. https://taphealth24.com/2017/05/19/heart-attack-symptoms/