What are the symptoms of heart attack?

 
All heart attacks begin suddenly, crushing chest pain that is often shown on television or in movies. In one study, for example, one third of patients who had heart attacks had chest pain. These patients were more likely to be older, female, or diabetes.
Signs and symptoms of a heart attack are not the same for everyone.Many heart attacks start slowly with mild pain or discomfort. Some people have no symptoms at all. Heart attacks that occur without any symptoms or very mild symptoms is called a silent heart attacks.
Chest pain or discomfort
The most common symptom is chest pain or discomfort. This includes new chest pain or discomfort or change in the pattern of current chest pain or discomfort.
Most heart attacks are associated with pain in the middle or the left chest, which often lasts longer than a few minutes or goes away and comes back.Discomfort can feel like uncomfortable pressure, squeezing, fullness and pain. Sensation may be mild or severe.
Heart attack pain sometimes feel like indigestion or heartburn.
Angina symptoms (JI-or-Nuh-Nuh-juh), can be similar to symptoms of a heart attack. Angina is chest pain that occurs in people with coronary artery disease, generally when active. Angina pain usually lasts only a few minutes and goes away with rest.
Chest pain or discomfort which does not disappear or change their usual pattern (for example, occurs more often, or when you are resting) may be a sign of a heart attack. 
All chest pain should check out a doctor.
Other symptoms of
Other signs and symptoms of a heart attack is the appearance of the new:
Discomfort in the upper body one or both arms, back, neck, jaw or upper abdomenShortness of breath, which can occur before or chest discomfortNausea (upset stomach), vomiting, dizziness, or sudden dizziness or start a cold sweatSleep disturbances, fatigue (tiredness), or lack of energyNot everyone has the typical symptoms of a heart attack. If you've had a heart attack, symptoms may be similar to the other. However, some people may be a model of recurrent symptoms.
The symptoms you have, the more likely you have had a heart attack.
Act fast
Signs and symptoms of a heart attack may develop suddenly. However, it may also develop slowly, sometimes within hours, days or weeks of a heart attack.
Know the warning signs of a heart attack, so you can work quickly to get treatment for yourself or someone else. The sooner you get relief, less damage to your heart can handle.