What is the sign that the patient has myocardial infarction?

Symtoms of MI: Chest pain, pressure pain, radiates to arms and jaw. Sob along with nausea and other GI symtoms. Symptoms first manifest with activity. Some patients may have atypical presentation like heart burn. Patient are usually pale, anxious and perspiration is present. Ecg most of the time is helpful.

Chest pain: Substernal crushing persistent pain with fear, breathlessness, fainting, collapse. Proof is by ekg and troponins blood testing then choices of interventions or not.