> Your heart’s not just going to stop. A heart attack is not actually your heart stopping. It’s caused by a lack of oxygen to the heart tissue, causing pain a

> Your heart’s not just going to stop. A heart attack is not actually your heart stopping. It’s caused by a lack of oxygen to the heart tissue, causing pain and damage. It is often not immediately fatal. It can lead, sooner or later, to cardiac arrest, which is when your heart stops completely, and often is fatal.