Different symptoms may arise depending upon the type of attack. Patient may feel acute chest pain. Problem in breathing and sweating are generally common. Someone may also feels restless. See this is my idea. But if you want some specialists opinion, I think this part might help you:
The American Heart Association and other medical experts say the body likely will send one or more of these warning signals of a heart attack:
1.Uncomfortable pressure fullness, squeezing or pain in the center of the chest lasting more than a few minutes.
2.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.
3.Chest discomfort with lightheadedness, fainting, sweating, nausea or shortness of breath.
4.Anxiety, nervousness and/or cold, sweaty skin.
5.Paleness or pallor.
6.Increased or irregular heart rate.
7.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.
....Yes if you find this symptoms in yourself or in anybody else, don't hesitate to visit doctor immediately.....Stay Healthy and be Happy. :)
Information taken from http://www.heartinfo.org/hrtatkang.html