People often think of heart attacks in overly-dramatized terms, such as is depicted in Hollywood movies and television shows. However, the reality is often very different to these over-the-top, onscreen portrayals. The video below will tell you what really happens in the event of a heart attack, and what you should do if and when you see the tell-tale symptoms either in yourself or someone around you. Remember - knowledge is power, so make sure you inform yourself by watching: