Signs Of Heart Attack More Condition_symptoms What Are Some Signs Of A Heart Attack?

What are some signs of a heart attack? - signs of heart attack more condition_symptoms

What are the signs of a mild and severe attack of heart? I had pain in his left shoulder, where my collarbone and I know that this is not a heart attack, but I wonder whether it is a sign of something. So I do not know, or if there is something like the dr. above. Thank you for your answers!