Vomiting and dizziness are also symptoms of a person whose body may have gone into shock. Shock is what happens any time there is a very serious, sudden injury or health issue, and the body reacts. You find this reaction on the battlefield or in Emergency Rooms where the person has been shot. Stool discharge is much less common, though, in that situation and usually indicates a problem with the nervous or gastrointestinal systems, or perhaps a brain injury, especially when in combination with the other symptoms you listed here.
Classic signs and symptoms of acute myocardial infarction (AMI) "heart attack" include chest pain or pressure, nausea/vomiting,diaphoresis, and shortness of breath(SOB).
Keep in mind though that these are the "classic" S/S. In other words, they are very common and a high percentage of people exhibit these. However, this does not mean that all people will show these S/S.
You mentioned dizziness, this too is common because many people that are having a heart attack also have hypotension(low blood pressure), but it is not a "classic" sign.
As far as the "stool discharge" goes, if you mean diarrhea, this could possibly be present, but it is not common.
I am not really sure what you mean by stool discharge but vomiting and dizziness can be symptoms of many different things.
Some heart attacks happen very quickly, but most actually happen very slowly. They usually begin with mild pain and discomfort in the chest or upper body. According to the American Heart Association, here are the symptoms of a heart attack:
- 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 with or without chest discomfort.
- Other signs may include breaking out in a cold sweat, nausea or lightheadedness
As you can see, the first symptoms listed are pain and discomfort in the chest or upper body followed by shortness of breath. The best thing to do is see a doctor promptly. A doctor will be able to discuss your symptoms, and proceed with further testing if needed.