From Name: From Email: To Name: To Email: Optional Message: There is a need to recognize heart attack symptoms more quickly from Medical News Today Door-to-balloon time is the time from when a heart attack patient arrives in the emergency room until percutaneous coronary intervention is performed to restore blood flow. ST-segment elevation myocardial infarction (STEMI) is "a severe heart attack caused by a prolonged period of blocked blood supply that affects a large area of the heart," according to the American Heart Association. more 7701 Las Colinas Blvd., Ste. 800, Irving, TX 75063