Heart attacks are not commonly indicated by noticeable signs which include the infamous “Hollywood” heart attack in which a person grasps at his or her heart intensely.
As a matter of fact, there are about 25% of all heart attacks that happen silently which means there are no clear or distinguishable symptoms of it. These silent heart attacks are commonly deadly most especially to those people who delay or fail to seek medical treatment just on time.
Dr. Chauncey Crandall, one of the America’s most important cardiologists, has consumed decades of working in order to prevent, minimize and reverse the heart disease. During this time, Dr. Crandall has discovered that the heart often warn people of a possible heart attack minutes, or even weeks before it actually occur.
Here are the signs and symptoms that you should notice according to ReadandDigest:
Swelling
A lot of people believed that swelling of the either feet or ankles has to do with too much standing or sitting but little did they know that heart failure can also cause the fluid to mount up in the body. This can actually lead to swelling of the legs or abdomen as well as the feet and ankles. Nevertheless, a lot of people start to retain too much fluid that they find themselves suddenly gains weight and more often as much as 10 pounds. When this actually happens, many people lose their appetite as well.
Anxiety
A lot of survivors have said that they had feelings of impending doom or anxiety attacks just before the heart attack actually happened. Even though a lot of people with anxiety attacks believe that they are having heart disease, still, it is better for them to be safe than sorry.
Pain in other parts of the body  

Based on the heart attack victims, the pain that they have felt started in the chest and spreads to the shoulders, arms, elbows, neck, jaw, back and even in the abdomen. Nonetheless, there are times where there is no actual chest pain which only means they can only feel the pain in some other body parts. Either pain between the shoulder blades or pain in one or both arms in common. This kind of pain come and go, so do not let it fool you.
Coughing
Some people who have experienced heart failure will cough with bloody phlegm but the others simply nags and wheeze cough which is actually one of the symptoms of heart attack. This is due to the fluid that was build-up in the lungs. It is important to pay a lot of attention to these symptoms most especially if you are already having any of the symptoms that are listed here.
Common or traditional signs you should be aware of: 
Chest uneasiness
Shortness of breath
Nausea
Cold sweat
Light-headedness
Note: Do not try to ignore these symptoms thinking that they will go away sooner or later. If the symptoms that you have felt last for more than 5 to 10 minutes then call someone to drive you to the nearest hospital. You can also chew and swallow an aspirin unless you are allergic to them.