+ Uncomfortable pressure, fullness, squeezing or pain in the center of the chest lasting more than a few minutes. + Pain spreading to the shoulders, neck or arms. The pain may be mild to intense. It may feel like pressure, tightness, burning, or heavy weight. It may be located in the chest, upper abdomen, neck, jaw, or inside the arms or shoulders + Chest discomfort with lightheadedness, fainting, sweating, nausea or shortness of breath + Anxiety, nervousness and/or cold, sweaty skin + Paleness or pallor + Increased or irregular heart rate + Feeling of impending doom. Not all of these signs occur in every attack. Sometimes they go away and return. If some occur, get help fast. IF YOU NOTICE ONE OR MORE OF THESE SIGNS IN YOURSELF OR OTHERS, DON T WAIT (an electrocardiogram to discover any abnormalities caused by damage to the heart) Heart muscle pain - angina - is likely to be the first warning of blocked coronary arteries, the cause of most heart attacks. While there are no infallible guidelines about whether a chest pain is heart-related, it generally takes a particular form. Heart discomfort is rarely a sharp, stabbing pain. The textbook description of angina is a feeling of heaviness, pressure, tightness or aching in the chest, usually accompanied by shortness of breath. The pain generally goes away when you stop exerting yourself, and it frequently isn t especially severe, which is, perhaps, unfortunate. Even a heart attack may not be unbearably painful at first, permitting its victim to delay seeking treatment for as much as four to six hours after its onset. By then, the heart may have suffered irreversible damage. Angina is a protest from the heart muscle that it isn t getting enough oxygen because of diminished blood supply. A heart attack is simply the most extreme state of oxygen deprivation, in which whole regions of heart muscle cells begin to die for lack of oxygen. Consult a cardiologist immediately.