Some heart attacks are sudden and intense the "movie heart attack," where no one doubts what's happening. But most heart attacks start slowly, with mild pain or discomfort. Often people affected aren't sure what's wrong and wait too long before getting help. Here are signs that can mean a heart attack is happening:

Chest discomfort. Most heart attacks involve discomfort in the center of the chest that lasts more than a few minutes, or that goes away and comes back. It can feel like uncomfortable pressure, squeezing, fullness or pain.
Discomfort in other areas of the upper body. Symptoms can include pain or discomfort in one or both arms, the back, neck, jaw or stomach.
Shortness of breath. May occur with or without chest discomfort.
Other signs: These may include breaking out in a cold sweat, nausea or lightheadedness
As with men, women's most common heart attack symptom is chest pain or discomfort. But women are somewhat more likely than men to experience some of ...more

Sweating, crushing pain in chest, left arm, pain in jaw, desire to go to toilet (very dangerous to go and strain for passing stool) etc., but some attacks are silent. MI (Myocardial Infarction) is the technical / medical term.

My father had 4 heart attacks before his death.
each time he suffered an attack ------------- the symptom was different.
but yes ---------- he had a severe pain in his left arm. moreover , he used to sweat a lot too.

Swetting,pain from neck to left hand down wards,omting tendency of omting.giddiness.

Not one but many and some times it is silent also for diabetic patient

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.

Early signals of heart attack

Uncomfortable pressure, fullness, squeezing, or pain in the chest, usually lasting longer than two minutes

Pain radiating to the shoulders, neck, jaw, arms, or back

Dizziness, fainting, sweating, nausea, shortness of breath, or weakness

None of these symptoms assures that a heart attack is in progress, but the more symptoms you have, the more likely it is a heart attack.
...more

Severe pain and sometimes some parts of the body stop functioning.

When you seen a beautiful girl and go to purpose him after she splached her hand in your face and kiked you that is the symptoms of heart attack.

Some heart attacks are sudden and intense the "movie heart attack," where no one doubts what's happening. But most heart attacks start slowly, with mild pain or discomfort. Often people affected aren't sure what's wrong and wait too long before getting help. Here are signs that can mean a heart attack is happening:

Chest discomfort. Most heart attacks involve discomfort in the center of the chest that lasts more than a few minutes, or that goes away and comes back. It can feel like uncomfortable pressure, squeezing, fullness or pain.
Discomfort in other areas of the upper body. Symptoms can include pain or discomfort in one or both arms, the back, neck, jaw or stomach.
Shortness of breath. May occur with or without chest discomfort.
Other signs: These may include breaking out in a cold sweat, nausea or lightheadedness