The common signs that a person is about to have a heart attack, before it happens?

None really. Remember a heart attack is an occlusion of a coronary artery and doesn't mean cardiac arrest. If you develop sudden crushing chest pain not relieved with rest you may be having a heart attack. Seek urgent medical attention.
Variable. The classic chest pain going to the left arm does occur, but significant numbers of patients (25-40%) may have no warning at all. Pain in the abdomen, jaw, shoulders, neck, teeth, or just nausea may be presenting symptoms. Effort related symptoms as described may be harbingers of a heart attack. Compounding the problem is that women may present differently, with breathlessness common.

Related Questions

Concerned about my outlook. Ef of 15 in march, now 50. No heart attack, cath clear. Is this improvement positive and a good sign for recovery?

Great sign! It's not uncommon for an ef (ejection fraction or how much the heart pumps) to improve. Your's is now pretty much normal but given your history of it being low, it should always be followed closely by a heart doctor. Read more...

The night before I noticed my arm had mild pain in it almost like I pulled a muscle it had not been hurting all that day I know that unexplained left arm pain is a sign of a heart attack knowing this information I began to monitor and worry about myself a

Question unfinished. If it feels like a pulled muscle, it is most likely a pulled muscle, especially in a 26 y/o, unless you have a strong family history of early heart disease. Take some Motrin and if the pain doesn't go away in a couple of days, or gets worse, see a doctor. Read more...
Very unlikely. Yes - left arm pain could happens with heart attack but is shorted in duration, is accompanied by pressure in the chest, difficulty breathing, cold sweats, in older individuals with predisposing conditions. In your situation - i agree that most likely you pulled a muscle. Read more...