Chest pain doesn't always signal a heart attack. But that's what emergency room doctors will test for first because it's potentially the most immediate threat to your life. They may also check for life-threatening lung conditions — such as a collapsed lung or a clot in your lung.
When you have chest pain, your first thought may be that you’re having a heart attack. While chest pain is a well-established sign of a heart attack, it can also be caused by many other less serious conditions.
